Table of Contents

Table of Contents
Table of Contents
INTRODUCTION
WHAT IS OBD? ...........................................................................................
YOU CAN DO IT! ..................................................................................................
SAFETY PRECAUTIONS
SAFETY FIRST! ...........................................................................................
ABOUT THE TOOL
BATTERY INSTALLATION / REPLACEMENT ............................................
ADJUSTMENTS/SETTINGS AND DTC LIBRARY .......................................
TOOL CONTROLS
CONTROLS AND INDICATORS .................................................................
DISPLAY FUNCTIONS ................................................................................
VIEWING DTCs IN THE TOOL’S MEMORY ................................................
PREPARATION FOR TESTING
PRELIMINARY VEHICLE DIAGNOSTIC WORKSHEET .............................
BEFORE YOU BEGIN .................................................................................
VEHICLE SERVICE MANUALS ..................................................................
GENERAL CODE RETRIEVAL PROCEDURES
OBD1 SYSTEMS .........................................................................................
OBD2 SYSTEMS .........................................................................................
OBD2 SYSTEMS
VEHICLES COVERED ................................................................................
DIAGNOSTIC TROUBLE CODES (DTCs) ...................................................
CODE RETRIEVAL PROCEDURE ..............................................................
VIEWING ENHANCED DATA ......................................................................
VIEWING VEHICLE INFORMATION ............................................................
ERASING DIAGNOSTIC TROUBLE CODES (DTCs)...................................
I/M READINESS TESTING ..........................................................................
CHRYSLER/JEEP OBD1 SYSTEMS
CHRYSLER/JEEP OBD1 SYSTEMS ...........................................................
VEHICLES COVERED ................................................................................
INSTRUMENT PANEL INDICATOR LIGHTS ..............................................
DATA LINK CONNECTOR (DLC) ................................................................
CODE RETRIEVAL PROCEDURE ..............................................................
FORD OBD1 SYSTEMS
FORD COMPUTER SYSTEM OVERVIEW .................................................
VEHICLES COVERED ................................................................................
TEST CONNECTORS .................................................................................
CONNECTING THE TOOL ..........................................................................
DIAGNOSTIC TROUBLE CODES (DTCs) ...................................................
CODE RETRIEVAL PROCEDURES ...........................................................
ADDITIONAL TESTS FOR EEC-IV SYSTEMS ............................................
GM OBD1 SYSTEMS
YOUR VEHICLE'S COMPUTER SYSTEM ..................................................
VEHICLES COVERED ................................................................................
ABOUT THE TOOL .....................................................................................
DATA LINK CONNECTOR (DLC) ................................................................
MALFUNCTION INDICATOR LIGHT (MIL) ..................................................
DIAGNOSTIC TROUBLE CODES (DTC's) ..................................................
CODE RETRIEVAL PROCEDURE ..............................................................
TOYOTA/LEXUS OBD1 SYSTEMS
ON-BOARD VEHICLE DIAGNOSTICS (OBD1) ...........................................
VEHICLES COVERED ................................................................................
DATA LINK CONNECTOR (DLC) ................................................................
MALFUNCTION INDICATOR LIGHT (MIL) ..................................................
DIAGNOSTIC TROUBLE CODES ...............................................................
CODE RETRIEVAL PROCEDURE ..............................................................
SERVICING DTCS
SERVICING DTCs - OBD I ..........................................................................
ERASING DTCS
ERASING DTCs (OBD I SYSTEMS) ...........................................................
GLOSSARY
GLOSSARY OF TERMS AND ABBREVIATIONS.........................................
WARRANTY AND SERVICING
LIMITED ONE YEAR WARRANTY ..............................................................
SERVICE PROCEDURES ...........................................................................
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OBD2 & 1
Introduction
WHAT IS OBD?
WHAT IS OBD?
The Enhanced OBD2 & 1 Tool is designed to work on most
Chrysler, Ford, GM and Toyota OBD1 systems and all OBD2
compliant vehicles.
One of the most exciting improvements in the
automobile industry was the addition of onboard diagnostics (OBD) on vehicles, or in more
basic terms, the computer that activates the
vehicle’s “CHECK ENGINE” light. OBD1 was
designed to monitor manufacturer-specific
systems on vehicles built from 1981 to 1995.
Then came the development of OBD2, which is
on all 1996 cars and light trucks sold in the United States. These
systems are part of a government mandate to lower vehicle emissions.
The sophisticated programs in the vehicle’s on-board computer system
are designed to detect failures in a range of vehicle systems. Diagnostic
information can be accessed through a Data Link Connector test port
specifically designed for this purpose. For all OBD systems, if a problem
is found, the computer turns on the “CHECK ENGINE” light to warn the
driver, and sets a Diagnostic Trouble Code (DTC) to identify where the
problem occurred. A special diagnostic tool, such as the Enhanced
OBD2 & 1 Tool, is required to retrieve these codes, which consumers
and professionals use as a starting point for repairs.
The Enhanced OBD2 & 1 Tool provides the additional ability to retrieve
enhanced DTCs from most Chrysler/Jeep, General Motors, Ford, Mazda
and Isuzu vehicles. The types of enhanced data available depends on
the vehicle make.
OBD2 & 1
1
You Can Do It!
EASY TO USE – EASY TO VIEW – EASY TO DEFINE
Easy To Use . . . .
„
Connect the Tool to the vehicle’s test
connector.
„
Turn the ignition key "On.”
„
Press the POWER/LINK button.
Easy To View . . . .
„
The Tool retrieves stored codes, as well
as Freeze Frame data and I/M
Readiness status (OBD2 systems only).
„
Codes, I/M Readiness status and
Freeze Frame data are displayed on the
Tool’s LCD display screen. System
status is indicated by LED indicators.
Easy To Define . . . .
2
„
Read code definitions from the Tool’s
LCD display.
„
View Freeze
systems only).
Frame
data
(OBD2
OBD2 & 1
Safety Precautions
SAFETY FIRST!
SAFETY FIRST!
To avoid personal injury, instrument damage and/or
damage to your vehicle; do not use the OBD2 Code Reader
before reading this manual.
This manual describes common test procedures used
by experienced service technicians. Many test procedures
require precautions to avoid accidents that can result in
personal injury, and/or damage to your vehicle or test
equipment. Always read your vehicle's service manual and
follow its safety precautions before and during any test or
service procedure. ALWAYS observe the following general
safety precautions:
When an engine is running, it produces carbon monoxide,
a toxic and poisonous gas. To prevent serious injury or
death from carbon monoxide poisoning, operate the
vehicle ONLY in a well-ventilated area.
To protect your eyes from propelled objects as well as hot
or caustic liquids, always wear approved safety eye
protection.
When an engine is running, many parts (such as the
coolant fan, pulleys, fan belt etc.) turn at high speed. To
avoid serious injury, always be aware of moving parts.
Keep a safe distance from these parts as well as other
potentially moving objects.
Engine parts become very hot when the engine is running.
To prevent severe burns, avoid contact with hot engine
parts.
P RND L
Before starting an engine for testing or troubleshooting,
make sure the parking brake is engaged. Put the
transmission in park (for automatic transmission) or
neutral (for manual transmission). Block the drive wheels
with suitable blocks.
Connecting or disconnecting test equipment when the
ignition is ON can damage test equipment and the
vehicle's electronic components. Turn the ignition OFF
before connecting the Code Reader to or disconnecting
the Code Reader from the vehicle’s Data Link Connector
(DLC).
OBD2 & 1
3
Safety Precautions
SAFETY FIRST!
To prevent damage to the on-board computer when taking
vehicle electrical measurements, always use a digital
multimeter with at least 10 MegOhms of impedance.
Fuel and battery vapors are highly flammable. To prevent
an explosion, keep all sparks, heated items and open
flames away from the battery and fuel / fuel vapors. DO
NOT SMOKE NEAR THE VEHICLE DURING TESTING.
Don't wear loose clothing or jewelry when working on an
engine. Loose clothing can become caught in the fan,
pulleys, belts, etc. Jewelry is highly conductive, and can
cause a severe burn if it makes contact between a power
source and ground.
4
OBD2 & 1
About the Tool
BATTERY INSTALL / REPLACEMENT / ADJUSTMENTS/SETTINGS & DTC LIBRARY
BATTERY INSTALLATION / REPLACEMENT
Replace batteries when the battery symbol
is visible on display
and/or the 3 LEDS are all lit and no other data is visible on screen.
1. Locate the battery cover on the back of the Tool.
2. Slide the battery cover off (use your fingers).
3. Replace batteries with three AA-size batteries (for longer life, use
Alkaline-type batteries).
4. Reinstall the battery cover on the back of the Tool.
Language Selection After Battery Installation
The first time the unit is turned on , you
must select the desired display language
(English, French or Spanish) as follows:
1. Press and hold the POWER/LINK
button for approximately 3 seconds to
turn the Tool “ON.”
„
The Select Language screen displays.
2. Use the UP
and DOWN
the desired display language.
buttons, as necessary, to highlight
3. When the desired display language is selected, press the
button to confirm your selection.
ENTER/FF
After the initial language selection is performed, it, as well as
other settings, can be changed as desired. Proceed to
“ADJUSTMENTS/SETTINGS AND DTC LIBRARY” below for
further instructions.
ADJUSTMENTS/SETTINGS AND DTC LIBRARY
The OBD2 & 1 Tool lets you make several adjustments and settings to
configure the tool to your particular needs. It also contains an OBD2
DTC Library that allows you to search for DTC definitions. The following
functions, adjustments and settings can be performed when the OBD2 &
1 Tool is in “MENU Mode”:
„
Adjust Brightness: Adjusts the brightness of the LCD display
screen.
„
DTC Library: Lets you search the library of OBD2 DTC definitions.
„
Select Language: Sets the display language for the Tool to English,
French or Spanish.
OBD2 & 1
5
About the Tool
ADJUSTMENTS/SETTINGS AND DTC LIBRARY
„
Unit of Measurement: Sets the Unit of Measurement for the Tool’s
display to USA or Metric.
Adjustments and settings can be made only when the Tool is
NOT connected to a vehicle.
To enter the MENU Mode:
1. With the Tool OFF, press and hold the
UP
button, then press and release
the POWER/LINK
button.
„
The adjustments and setting MENU
displays.
2. Release the UP
button.
DO NOT release the UP
button until the adjustments and
settings MENU is visible on the display.
3. Make adjustments and settings as described in the following
paragraphs.
Adjusting Display Brightness
1. Use the UP
and DOWN
buttons,
as necessary, to highlight Adjust
Brightness in the MENU, then press
the ENTER/FF
button.
„
The Adjust Brightness screen displays.
„
The Brightness field shows the current brightness setting, from 0 to 43.
2. Press the UP
button to decrease the
brightness of the LCD display (make the
display darker).
3. Press the DOWN
button to increase
the brightness of the LCD display (make
the display lighter).
4. When the desired brightness is obtained, press the ENTER/FF
button to save your changes and return to the MENU.
Searching for a DTC Definition Using the DTC Library (applicable
to OBD2 systems only)
and DOWN
buttons,
1. Use the UP
as necessary, to highlight DTC Library
in the MENU, then press the ENTER/FF
button.
6
OBD2 & 1
About the Tool
ADJUSTMENTS/SETTINGS & DTC LIBRARY
„
The Enter DTC screen displays. The screen shows the code
“P0001”, with the “P” flashing.
2. Use the UP
and DOWN
buttons,
as necessary, to scroll to the desired
DTC type (P=Powertrain, U=Network,
B=Body, C=Chassis), then press the
button.
DTC SCROLL
„
The selected character displays “solid”,
and the next character begins flashing.
3. Select the remaining characters in the DTC in the same way,
button to confirm each character.
pressing the DTC SCROLL
When you have selected all the DTC characters, press the
ENTER/FF
button to view the DTC definition.
„
If you entered a “Generic” DTC
(DTCs that start with “P0”, “P2” and
some “P3”):
- The selected DTC and DTC
definition (if available), show on
the Scan Tool’s LCD display.
„
If you entered a “ManufacturerSpecific” DTC (DTCs that start with
“P1” and some “P3”):
- The “Select Manufacturer” screen
displays.
- Use the UP
and DOWN
buttons, as necessary, to highlight the appropriate manufacturer,
then press the ENTER/FF
button to display the correct DTC
for your vehicle.
If a definition for the DTC you
entered is not available, an
advisory message shows on the
CanOBD2&1 Tool’s display.
4. If you wish to view definitions for
additional DTCs, press the ENTER/FF
button to return to the DTC Library
screen, and repeat steps 2 and 3.
5. When all desired DTCs have been viewed, press the ERASE
button to exit the DTC Library.
OBD2 & 1
7
About the Tool
ADJUSTMENTS/SETTINGS AND DTC LIBRARY
Selecting the Display Language
and DOWN
buttons, as necessary, to highlight
1. Use the UP
Select Language in the MENU, then press the ENTER/FF
button.
„
The Select Language screen displays.
„
The currently selected
Language is highlighted.
display
2. Press the UP
or DOWN
button,
as necessary, to highlight the desired
display language.
3. When the desired display language is
highlighted, press the ENTER/FF
button to save your changes and return
to the MENU (shown in the selected
display language).
Setting the Unit of Measurement
and DOWN
buttons,
1. Use the UP
as necessary, to highlight Unit of
Measurement in the MENU, then press
the ENTER/FF
button.
2. Press the UP
or DOWN
button,
as necessary, to highlight the desired
Unit of Measurement.
3. When the desired Unit of Measurement
value is selected, press the ENTER/FF
button to save your changes.
Exiting the MENU Mode
and DOWN
buttons, as necessary, to highlight
1. Use the UP
Menu Exit in the MENU, then press the ENTER/FF
button.
„
8
The LCD display returns to the DTC screen (if data is currently
stored in the Tool’s memory) or the “To Link” screen (if no data
is stored).
OBD2 & 1
Tool Controls
CONTROLS AND INDICATORS
CONTROLS AND INDICATORS
11
10
7
8
6
9
1
3
2
4
5
16
12
13
14
15
Figure 1. Controls and Indicators
See Figure 1 for the locations of items 1 through 16, below.
1.
ERASE button - Erases Diagnostic Trouble Codes (DTCs), and
“Freeze Frame” data from your vehicle’s computer, and resets
Monitor status. (“Freeze Frame” data and Monitor status are
applicable to OBD2 systems only.)
2.
DTC SCROLL button - Displays the DTC View screen and/or
scrolls the LCD display to view DTCs when more than one DTC is
present.
3.
POWER/LINK button - When the Tool IS NOT connected to a
vehicle, turns the Tool “On” and “Off”. When the Tool is connected
to a vehicle, links the Tool to the vehicle’s PCM to retrieve
diagnostic data from the computer’s memory. (The LINK function is
applicable to OBD2 systems only.)
To turn the Tool "On", you must press and hold the
POWER/LINK
button for approximately 3 seconds.
OBD2 & 1
9
Tool Controls
CONTROLS AND INDICATORS
4.
ENTER/FREEZE FRAME button - When in MENU mode,
confirms the selected option or value. When retrieving and viewing
DTCs, displays Freeze Frame data for the highest priority code.
(The Freeze Frame function is applicable to OBD2 systems only.)
5.
DOWN button - When in MENU mode, scrolls DOWN through
the menu and submenu selection options. When retrieving and
viewing DTCs, scrolls down through the current display screen to
display any additional data.
6.
UP button - When in MENU mode, scrolls UP through the menu
and submenu selection options. When retrieving and viewing DTCs,
scrolls ups through the current display screen to display any
additional data.
7. GREEN LED - Indicates that all engine systems are running
normally (all Monitors on the vehicle are active and performing their
diagnostic testing, and no DTCs are present). (Monitors are
applicable to OBD2 systems only.)
8. YELLOW LED - Indicates there is a possible problem. A “Pending”
or a history DTC is present and/or some of the vehicle’s emission
monitors have not run their diagnostic testing. (Monitors and
pending DTCs are applicable to OBD2 systems only.)
9. RED LED - Indicates there is a problem in one or more of the
vehicle’s systems. The red LED is also used to show that DTC(s)
are present. DTCs are shown on the Tool’s LCD display. In this
case, the Malfunction Indicator (“Check Engine”) lamp on the
vehicle’s instrument panel will light steady on.
10. LCD Display - Displays settings Menu and submenus, test results,
Tool functions and Monitor status information. See DISPLAY
FUNCTIONS, on next page, for more details. (Monitors are
applicable to OBD2 systems only.)
11. Cable - Connects the Tool to the vehicle’s Data Link Connector
(DLC) when retrieving codes from OBD1 systems (used with items
12, 13, 14 and 16).
12. CHRYSLER Connector Cable Adaptor - Installs on cable (item 11)
when connecting to a Chrysler OBD1 Data Link Connector.
13. FORD Connector Cable Adaptor - Installs on cable (item 11) when
connecting to a Ford OBD1 Data Link Connector.
14. GM Connector Cable Adaptor - Installs on cable (item 11) when
connecting to a GM OBD1 Data Link Connector.
15. OBD II Cable - Connects the Tool to the vehicle's Data Link
Connector (DLC) when retrieving codes from OBD2 systems.
16. TOYOTA Connector Cable Adaptor - Installs on cable (item 11)
when connecting to a Toyota OBD1 Data Link Connector.
10
OBD2 & 1
Tool Controls
DISPLAY FUNCTIONS
DISPLAY FUNCTIONS
2
1
11 12
13
3
4
5
6
15
16
7
14
10
8
9
Figure 2. Display Functions
See Figure 2 for the locations of items 1 through 16, below.
1. I/M MONITOR STATUS field - Identifies the I/M Monitor status area.
(This function is applicable to OBD2 systems only.)
2. Monitor icons - Indicate which Monitors are supported by the
vehicle under test, and whether or not the associated Monitor has
run its diagnostic testing (Monitor status). When a Monitor icon is
solid, it indicates that the associated Monitor has completed its
diagnostic testing. When a Monitor icon is flashing, it indicates that
the vehicle supports the associated Monitor, but the Monitor has not
yet run its diagnostic testing. (This function is applicable to OBD2
systems only.)
3.
Vehicle icon - Indicates whether or not the Tool is being
properly powered through the vehicle’s Data Link Connector (DLC).
A visible icon indicates that the Tool is being powered through the
vehicle’s DLC connector.
4.
Link icon - Indicates whether or not the Tool is communicating
(linked) with the vehicle’s on-board computer. When visible, the Tool
is communicating with the computer. If the Link icon is not visible,
the Tool is not communicating with the computer.
5.
Computer icon - When this icon is visible it indicates that the
Tool is linked to a personal computer. An optional “PC Link Kit” is
available that makes it possible to upload retrieved data to a
personal computer.
6.
Tool Internal Battery icon - When visible, indicates the Tool
batteries are “low” and should be replaced. If the batteries are not
replaced when the battery symbol is "on", all 3 LEDs will light up
as a last resort indicator to warn you that the batteries need
replacement. No data will be displayed on screen when all 3 LEDs
are lit.
OBD2 & 1
11
Tool Controls
DISPLAY FUNCTIONS
7. DTC Display Area - Displays the Diagnostic Trouble Code (DTC)
number. Each fault is assigned a code number that is specific to that
fault.
8. Test Data Display Area - Displays DTC definitions, Freeze Frame
data, and other pertinent test information messages.
9. MIL icon - Indicates the status of the Malfunction Indicator Lamp
(MIL). The MIL icon is visible only when a DTC has commanded the
MIL on the vehicle’s dashboard to light.
10. HISTORY icon – Indicates the currently displayed DTC is a
“History” code.
11. CODE icon - Identifies the Code Number Sequence display area.
12. PENDING icon - Indicates the currently displayed DTC is a
“Pending” code. (This function is applicable to OBD2 systems only.)
13. Code Number Sequence - The Tool assigns a sequence number to
each DTC that is present in the computer’s memory, starting with
“01.” This number indicates which code is currently displayed. Code
number “01” is always the highest priority code, and the one for
which “Freeze Frame” data has been stored. (Freeze Frame data is
applicable to OBD2 systems only.)
If “01” is a “Pending” code, there may or may not be
“Freeze Frame” data stored in memory.
14. Code Enumerator - Indicates the total number of codes retrieved
from the vehicle’s computer.
12
15.
Generic DTC icon - When visible, indicates that the currently
displayed DTC is a “Generic” or “Universal” code. (This function is
applicable to OBD2 systems only.)
16.
Manufacturer Specific DTC icon - When visible, indicates that
the currently displayed DTC is a Manufacturer Specific Code. (This
function is applicable to OBD2 systems only.)
OBD2 & 1
Tool Controls
VIEWING DTCs IN THE TOOL’S MEMORY
VIEWING DTCs IN THE TOOL’S MEMORY
To view DTC’s and other diagnostic data stored in the Tool’s memory,
do the following:
1. With no DLC cable connected to the
Tool, press the POWER/LINK
button to turn the Tool “on”.
2. Press the ENTER/FF
button.
3. Use the
and
keys to highlight
and select your vehicle’s OBD system
(OBD1 or OBD2). Press the ENTER/FF
button to continue.
„
Select “Back” if you wish to return to
the Main Menu.
4. If DTCs are present in the Tool’s
memory, the first stored DTC will display
on the screen.
„
If more than one DTC is present,
use the DTC SCROLL
button to
scroll through the DTC’s.
5. “For OBD2 systems only” - Saved
Freeze Frame data and Monitor status
are also available (press the
ENTER/FF
button to view Freeze
Frame data).
6. If no DTCs are in the Tool’s memory, a
“No DTC’s are presently stored in the
Tool’s memory” message displays.
OBD2 & 1
13
Preparation for Testing
PRELIMINARY VEHICLE DIAGNOSTIC WORKSHEET
PRELIMINARY VEHICLE DIAGNOSTIC WORKSHEET
The purpose of this form is to help you gather preliminary information on
your vehicle before you retrieve codes. By having a complete account of
your vehicle's current problem(s), you will be able to systematically
pinpoint the problem(s) by comparing your answers to the fault codes
you retrieve. You can also provide this information to your mechanic to
assist in diagnosis and help avoid costly and unnecessary repairs. It is
important for you to complete this form to help you and/or your
mechanic have a clear understanding of your vehicle's problems.
NAME:
DATE:
VIN*:
YEAR:
MAKE:
MODEL:
ENGINE SIZE:
VEHICLE MILEAGE:
*VIN: Vehicle Identification Number, found at the base of the windshield
on a metallic plate, or at the driver door latch area (consult your vehicle
owner's manual for location).
TRANSMISSION:
†
Automatic
†
Manual
Please check all applicable items in each category.
DESCRIBE THE PROBLEM:
14
OBD2 & 1
Preparation for Testing
PRELIMINARY VEHICLE DIAGNOSTIC WORKSHEET
WHEN DID YOU FIRST NOTICE THE PROBLEM:
†
Just Started
†
Started Last Week
†
Started Last Month
†
Other:
m
LIST ANY REPAIRS DONE IN THE PAST SIX MONTHS:
PROBLEMS STARTING
† No symptoms
†
Cranks, but will not start
†
†
Starts, but takes a long
time
†
Right after vehicle
comes to a stop
Will not crank
ENGINE QUITS OR STALLS
†
No symptoms
†
Right after starting
†
When shifting into gear
†
While idling
During steady-speed
driving
†
During acceleration
When parking
†
†
IDLING CONDITIONS
†
No symptoms
†
Is too slow at all times
†
Is too fast
†
Is sometimes too fast or
too slow
†
Is rough or uneven
†
Fluctuates up and down
RUNNING CONDITIONS
†
No symptoms
†
Backfires
†
Runs rough
Lacks power
†
†
†
†
Bucks and jerks
Misfires or cuts out
Engine knocks, pings or
rattles
†
Poor fuel economy
†
Surges
†
Hesitates or stumbles on
accelerations
†
Dieseling or run-on
OBD2 & 1
15
Preparation for Testing
PRELIMINARY VEHICLE DIAGNOSTIC WORKSHEET
AUTOMATIC TRANSMISSION PROBLEMS (if applicable)
†
†
†
†
No symptoms
Shifts too early or too late
Changes gear incorrectly
PROBLEM OCCURS
Morning
†
†
†
Vehicle does not move
when in gear
Jerks or bucks
Afternoon
†
Anytime
†
Hot
ENGINE TEMPERATURE WHEN PROBLEM OCCURS
†
Cold
†
Warm
DRIVING CONDITIONS WHEN PROBLEM OCCURS
†
†
†
†
†
†
†
†
Short - less than 2 miles
2 - 10 miles
Long - more than 10 miles
Stop and go
While turning
While braking
At gear engagement
With A/C operating
†
†
†
†
†
†
†
With headlights on
During acceleration
Mostly driving downhill
Mostly driving uphill
Mostly driving level
Mostly driving curvy
roads
Mostly driving rough
roads
DRIVING HABITS
†
†
†
†
†
Mostly city driving
Highway
Park vehicle inside
Park vehicle outside
†
†
Drive less than 10 miles per day
Drive 10 to 50 miles per day
Drive more than 50 miles per
day
GASOLINE USED
†
†
†
87 Octane
89 Octane
†
91 Octane
More than 91 Octane
WEATHER CONDITIONS WHEN PROBLEM OCCURS
†
†
32 - 55° F (0 - 13° C)
Below freezing (32° F / 0° C)
†
Above 55° F (13° C)
CHECK ENGINE LIGHT / DASH WARNING LIGHT
†
Sometimes ON
†
†
Always ON
Never ON
PECULIAR SMELLS
†
†
†
"Hot"
Sulfur ("rotten egg")
Burning rubber
†
†
†
Gasoline
Burning oil
Electrical
STRANGE NOISES
†
†
16
Rattle
Knock
†
†
Squeak
Other
OBD2 & 1
Preparation for Testing
BEFORE YOU BEGIN
BEFORE YOU BEGIN
The Enhanced OBD2 & 1 Tool
aids in monitoring electronicand emissions-related faults in
your vehicle and retrieving fault
codes related to malfunctions in
these systems. Mechanical
problems such as low oil level or
damaged hoses, wiring or electrical connectors can cause poor engine
performance and may also cause a fault code to set. Fix any known
mechanical problems before performing any test. See your vehicle’s
service manual or a mechanic for more information.
Check the following areas before starting any test:
„
Check the engine oil, power steering fluid, transmission fluid (if
applicable), engine coolant and other fluids for proper levels. Top off
low fluid levels if needed.
„
Make sure the air filter is clean and in good condition. Make sure all
air filter ducts are properly connected. Check the air filter ducts for
holes, rips or cracks.
„
Make sure all engine belts are in good condition. Check for cracked,
torn, brittle, loose or missing belts.
„
Make sure mechanical linkages to engine sensors (throttle, gearshift
position, transmission, etc.) are secure and properly connected. See
your vehicle’s service manual for locations.
„
Check all rubber hoses (radiator) and steel hoses (vacuum/fuel) for
leaks, cracks, blockage or other damage. Make sure all hoses are
routed and connected properly.
„
Make sure all spark plugs are clean and in good condition. Check
for damaged, loose, disconnected or missing spark plug wires.
„
Make sure the battery terminals are clean and tight. Check for corrosion or broken connections. Check for proper battery and charging
system voltages.
„
Check all electrical wiring and harnesses for proper connection.
Make sure wire insulation is in good condition, and there are no bare
wires.
„
Make sure the engine is mechanically sound. If needed, perform a
compression check, engine vacuum check, timing check (if applicable), etc.
OBD2 & 1
17
Preparation for Testing
VEHICLE SERVICE MANUALS
VEHICLE SERVICE MANUALS
Always refer to the manufacturer’s service manual for your vehicle
before performing any test or repair procedures. Contact your local car
dealership, auto parts store or bookstore for availability of these
manuals. The following companies publish valuable repair manuals:
„
Haynes Publications
861 Lawrence Drive
Newbury Park, California 91320
Phone: 800-442-9637
Web: www.haynes.com
„
Mitchell 1
14145 Danielson Street
Poway, California 92064
Phone: 888-724-6742
Web: www.m1products.com
„
Motor Publications
5600 Crooks Road, Suite 200
Troy, Michigan 48098
Phone: 800-426-6867
Web: www.motor.com
FACTORY SOURCES
Ford, GM, Chrysler, Honda, Isuzu, Hyundai and Subaru Service
Manuals
„
18
Helm Inc.
14310 Hamilton Avenue
Highland Park, Michigan 48203
Phone: 800-782-4356
Web: www.helminc.com
OBD2 & 1
General Code Retrieval Procedures
OBD1 SYSTEMS / OBD2 SYSTEMS
Procedures for Retrieving Diagnostic Trouble Codes from OBD1
systems are vehicle manufacturer specific. Each manufacturer uses
their own procedure.
Procedures for retrieving Diagnostic Trouble Codes from OBD2 systems
are generic, and apply to all vehicles equipped with OBD2 systems.
From the following list, select the procedure that applies to your
vehicle’s OBD system, and proceed to appropriate section for detailed
code retrieval procedures.
OBD1 SYSTEMS
Most cars and light trucks (under 8500 GW) sold in the U.S. from early
1980’s to 1995 are equipped with what is known as the first generation
of On-Board Diagnostics or “OBD1”.
„
If your Chrysler/Jeep, Ford, GM or Toyota vehicle, (1995 and older)
is equipped with an ‘OBD1 System”, proceed to the proper section
as indicated below, for a detailed application list and code retrieval
procedures:
„
CHRYSLER/JEEP ......................... page 47
„
FORD ............................................. page 52
„
GM ................................................. page 73
„
TOYOTA ........................................ page 79
OBD2 SYSTEMS
ALL 1996 and newer cars and light trucks (under 8500 GW) sold in the
U.S. are equipped with what is known as the second generation of OnBoard Diagnostics or “OBD2”.
„
If your vehicle (1996 and newer) is equipped with an “OBD2
System”, proceed to the “OBD2 SYSTEMS” section on page 19 for
a detailed application list, code retrieval procedures, Monitor status,
and Freeze Frame data information.
OBD2 & 1
19
OBD2 Systems
VEHICLES COVERED
VEHICLES COVERED
The Enhanced OBD2 & 1 Tool is designed to work on all OBD2
compliant vehicles. All 1996 and newer vehicles (cars and light trucks)
sold in the United States are OBD2 compliant.
Federal law requires that all 1996 and newer cars and light
trucks sold in the United States must be OBD2 compliant; this
includes all Domestic, Asian and European vehicles.
Some 1994 and 1995 vehicles are OBD2 compliant. To find out if a
1994 or 1995 vehicle is OBD2 compliant, check the following:
1. The Vehicle Emissions Control Information (VECI) Label. This
label is located under the hood or by the radiator of most vehicles. If
the vehicle is OBD2 compliant, the label will state “OBD II
Certified.”
VEHICLE EMISSION CONTROL INFORMATION
ENGINE FAMILY
DISPLACEMENT
VEHICLE
MANUFACTURER
EFN2.6YBT2BA
2.6L
OBD II
CERTIFIED
THIS VEHICLE CONFORMS TO U.S. EPA AND STATE
OF CALIFORNIA REGULATIONS APPLICABLE TO
1999 MODEL YEAR NEW TLEV PASSENGER CARS.
REFER TO SERVICE MANUAL FOR ADDITIONAL INFORMATION
TUNE-UP CONDITIONS: NORMAL OPERATING ENGINE TEMPERATURE,
ACCESSORIES OFF, COOLING FAN OFF, TRANSMISSION IN NEUTRAL
EXHAUST EMISSIONS STANDARDS
CERTIFICATION
IN-USE
SPARK PLUG
TYPE NGK BPRE-11
GAP: 1.1MM
OBD II
CERTIFIED
STANDARD CATEGORY
TLEV
TLEV INTERMEDIATE
CATALYST
2. Government Regulations require that all
OBD2 compliant vehicles must have a
“common”
sixteen-pin
Data
Link
Connector (DLC).
1 2 3 4 5 6 7 8
9 10111213141516
Some 1994 and 1995 vehicles have 16-pin connectors but are
not OBD2 compliant. Only those vehicles with a Vehicle
Emissions Control Label stating “OBD II Certified” are OBD2
compliant.
Data Link Connector (DLC) Location
The 16-pin DLC is usually
located under the instrument
panel (dash), within 12 inches
(300 mm) of center of the panel,
on the driver’s side of most
vehicles. It should be easily
accessible and visible from a
kneeling position outside the
vehicle with the door open.
20
LEFT CORNER
OF DASH
NEAR
CENTER
OF DASH
BEHIND
ASHTRAY
OBD2 & 1
OBD2 Systems
DIAGNOSTIC TROUBLE CODES (DTCs)
On some Asian and European vehicles the DLC is located
behind the “ashtray” (the ashtray must be removed to
access it) or on the far left corner of the dash. If the DLC
cannot be located, consult the vehicle’s service manual for
the location.
DIAGNOSTIC TROUBLE CODES (DTCs)
Diagnostic Trouble Codes (DTCs)
Diagnostic Trouble
are meant to guide you to the
Codes (DTCs) are
proper service procedure in the
vehicle’s service manual. DO NOT
codes that identify a
replace parts based only on DTCs
specific problem area.
without first consulting the vehicle’s
service manual for proper testing
procedures for that particular system, circuit or
component.
DTCs are alphanumeric codes that are used to
identify a problem that is present in any of the systems
that are monitored by the on-board computer (PCM).
Each trouble code has an assigned message that
identifies the circuit, component or system area where
the problem was found.
OBD2 diagnostic trouble codes are made up of five characters:
„
The 1st character is a letter. It identifies the “main system” where
the fault occurred (Body, Chassis, Powertrain, or Network).
„
The 2nd character is a numeric digit. It identifies the “type” of code
(Generic or Manufacturer-Specific).
Generic DTCs are codes that are used by all vehicle
manufacturers. The standards for generic DTCs, as well as
their definitions, are set by the Society of Automotive
Engineers (SAE).
Manufacturer-Specific DTCs are codes that are controlled by
the vehicle manufacturers. The Federal Government does not
require vehicle manufacturers to go beyond the standardized
generic DTCs in order to comply with the new OBD2
emissions standards. However, manufacturers are free to
expand beyond the standardized codes to make their systems
easier to diagnose.
„
The 3rd character is a numeric digit. It identifies the specific
system or sub-system where the problem is located.
„
The 4th and 5th characters are numeric digits. They identify the
section of the system that is malfunctioning.
OBD2 & 1
21
OBD2 Systems
DIAGNOSTIC TROUBLE CODES (DTCs)
OBD2 DTC EXAMPLE
P0201 - Injector Circuit Malfunction, Cylinder 1
B
C
P
U
-
Body
Chassis
Powertrain
Network
0
1
2
3
-
Generic
Manufacturer Specific
Generic
Includes both Generic and Manufacturer
Specific Codes
P0201
Identifies the system where the
problem is located:
1 - Fuel and Air Metering
2 - Fuel and Air Metering (injector circuit
malfunction only)
3 - Ignition System or Misfire
4 - Auxiliary Emission Control System
5 - Vehicle Speed Control and Idle Control
System
6 - Computer Output Circuits
7 - Transmission
8 - Transmission
Identifies what section of the system
is malfunctioning
DTCs and MIL Status
When the vehicle’s on-board computer detects
a failure in an emissions-related component or
system, the computer’s internal diagnostic
program assigns a diagnostic trouble code
(DTC) that points to the system (and subsystem)
where the fault was found. The diagnostic
program saves the code in the computer’s
memory. It records a “Freeze Frame” of
conditions present when the fault was found, and lights the Malfunction
Indicator Lamp (MIL). Some faults require detection for two trips in a row
before the MIL is turned on.
The “Malfunction Indicator Lamp” (MIL) is the accepted term
used to describe the lamp on the dashboard that lights to warn
the driver that an emissions-related fault has been found.
Some manufacturers may still call this lamp a “Check Engine”
or “Service Engine Soon” light.
22
OBD2 & 1
OBD2 Systems
CODE RETRIEVAL PROCEDURE
CODE RETRIEVAL PROCEDURE
Retrieving and using Diagnostic Trouble Codes (DTCs) for
troubleshooting vehicle operation is only one part of an
overall diagnostic strategy.
Never replace a part based only on the DTC definition.
Each DTC has a set of testing procedures, instructions
and flow charts that must be followed to confirm the
location of the problem. This information is found in the
vehicle's service manual. Always refer to the vehicle's
service manual for detailed testing instructions.
Check your vehicle thoroughly before performing
any test. See BEFORE YOU BEGIN on page 17
for details.
ALWAYS observe safety precautions whenever working on a
vehicle. See Safety Precautions on page 3 for more information.
1. Turn the ignition OFF.
2. Locate the vehicle's 16-pin Data Link
Connector (DLC). See page 20 for
connector location.
Some DLCs have a plastic cover
that must be removed before
connecting
the
Tool
cable
connector.
If the Tool is ON, turn it OFF by
pressing the POWER/LINK
button BEFORE connecting the
Tool to the DLC.
3. Connect the OBD II Cable to the Tool,
then connect to the vehicle’s DLC.
„
If you have problems connecting the cable connector to the DLC,
rotate the connector 180° and try again.
„
If you still have problems, check the
pins on the Tool’s DLC and on the
vehicle’s DLC.
4. When the Tool’s cable connector is
properly connected to the vehicle’s DLC,
the unit automatically turns ON, and the
LCD display shows instructions for linking
to the vehicle’s on-board computer.
„
If the unit does not power on automatically when connected to
the vehicle’s DLC connector, it usually indicates there is no
power present at the vehicle’s DLC connector. Check your fuse
panel and replace any burned-out fuses.
OBD2 & 1
23
OBD2 Systems
CODE RETRIEVAL PROCEDURE
„
If replacing the fuse(s) does not correct the problem, consult
your vehicle’s repair manual to identify the proper computer
(PCM) fuse/circuit, and perform any necessary repairs before
proceeding.
5. Turn the ignition on. DO NOT start the engine.
6. Press and release the Tool’s POWER/LINK
„
button.
The Tool will automatically start a
check of the vehicle’s computer to
determine which type of communication protocol it is using. When the
Tool identifies the computer’s communication protocol, a communication link is established. The protocol
type used by the vehicle’s computer
is shown on the LCD display.
A PROTOCOL is a set of rules and procedures for
regulating data transmission between computers, and
between testing equipment and computers. As of this
writing, five different types of protocols (ISO 9141,
Keyword 2000, J1850 PWM, J1850 VPW and CAN) are in
use by vehicle manufacturers. The Tool automatically
identifies the protocol type and establishes a
communication link with the vehicle’s computer.
7. After approximately 10~60 seconds, the Tool will retrieve and
display any Diagnostic Trouble Codes, Monitor Status and Freeze
Frame Data retrieved from the vehicle’s computer memory.
„
If the Tool fails to link to the
vehicle’s computer a “Linking
Failed” message shows on the
Tool’s LCD display.
- Verify the connection at the DLC
and verify the ignition is ON.
- Turn the ignition OFF, wait 5
seconds, then turn back ON to
reset the computer.
- Ensure your vehicle is OBD2 compliant. See VEHICLES
COVERED on page 20 for vehicle compliance verification
information.
„
24
The Tool will automatically re-link to
the vehicle’s computer every 30
seconds to refresh the data being
retrieved. When data is being refreshed, the message “One moment
Auto – link in progress” is shown on
the LCD display. This action repeats
as long as the Tool is communicating with the vehicle’s computer.
OBD2 & 1
OBD2 Systems
CODE RETRIEVAL PROCEDURE
„
The Tool will display a code only if
codes are present in the vehicle’s
computer memory. If no codes are
present, a “No DTC’s are presently
stored in the vehicle’s computer”
message is displayed.
„
The Tool is capable of retrieving and
storing up to 32 codes in memory,
for immediate or later viewing.
8. To read the display:
Refer to DISPLAY FUNCTIONS on page 11 for a
description of LCD display elements.
„
A visible
icon indicates that the Tool is being powered
through the vehicle’s DLC connector.
„
A visible
icon indicates that the Tool is linked to (communicating with) the vehicle’s computer.
„
The I/M Monitor Status icons indicate the type and number of
Monitors the vehicle supports, and provides indications of the
current status of the vehicle’s Monitors. A solid Monitor icon
indicates the associated Monitor has run and completed its
testing. A blinking Monitor icon indicates the associated Monitor
has not run and completed its testing.
„
The upper right hand corner of the
display shows the number of the
code currently being displayed, the
total number of codes retrieved, the
type of code (G = Generic; M =
Manufacturer Specific), and whether
or not the displayed code commanded the MIL on. If the code
being displayed is a PENDING code,
the PENDING icon is shown.
„
The Diagnostic Trouble Code (DTC) and related code definition
are shown in the lower section of the LCD display.
In the case of long code definitions, or when viewing
Freeze Frame data, a small arrow is shown in the
upper/lower right-hand corner of the code display area
to indicate the presence of additional information. Use
and
buttons, as necessary, to view the
the
additional information.
If a definition for the currently displayed code is not
available, an advisory message shows on the Tool’s
display.
9. Read and interpret Diagnostic Trouble Codes/system condition
using the LCD display and the green, yellow and red LEDs.
OBD2 & 1
25
OBD2 Systems
CODE RETRIEVAL PROCEDURE
The green, yellow and red LEDs are used (with the LCD
display) as visual aids to make it easier to determine
engine system conditions.
„
Green LED – Indicates that all
engine systems are “OK” and
operating normally. All monitors
supported by the vehicle have run
and performed their diagnostic
testing, and no trouble codes are
present. A zero will show on the
Tool’s LCD display, and all Monitor
icons will be solid.
„
Yellow LED – Indicates one of the following conditions:
A. A PENDING CODE IS PRESENT –
If the yellow LED is illuminated, it
may indicate a Pending code is
present. Check the Tool’s LCD
display for confirmation. A Pending
code is confirmed by the presence
of a numeric code and the word
PENDING on the Tool’s LCD display.
B. MONITOR NOT RUN STATUS –
If the Tool’s LCD display shows a
zero (indicating there are no
DTC’s present in the vehicle’s
computer memory), but the yellow
LED is illuminated, it may be an
indication that some of the
Monitors supported by the vehicle
have not yet run and completed
their diagnostic testing. Check the
Tool’s LCD display for confirmation. All Monitor icons that are blinking have not yet run
and completed their diagnostic testing; all Monitor icons
that are solid have run and completed their diagnostic
testing.
26
„
Red LED – Indicates there is a
problem with one or more of the
vehicle’s systems. The red LED
is also used to indicate that
DTC(s) are present (displayed
on the Tool’s screen). In this
case, the Multifunction Indicator
(Check Engine) lamp on the
vehicle’s instrument panel will be
illuminated.
„
DTC’s that start with “P0”, “P2” and some “P3” are considered
Generic (Universal). All Generic DTC definitions are the same
on all OBD2 equipped vehicles. The Tool automatically displays
the code definitions for Generic DTC’s.
OBD2 & 1
OBD2 Systems
CODE RETRIEVAL PROCEDURE
„
DTC’s that start with “P1” and some
“P3” are Manufacturer Specific
codes and their code definitions
vary with each vehicle manufacturer.
When a Manufacturer Specific DTC
is retrieved, the LCD display shows
a list of vehicle manufacturers. Use
and DOWN
buttons,
the UP
as necessary, to highlight the appropriate manufacturer, then
press the ENTER/FF
button to display the correct code
definition for your vehicle.
If the manufacturer for your vehicle is not listed, use the
and DOWN
buttons, as necessary, to select
UP
Other manufacturer and press the ENTER/FF
button
for additional DTC information.
If the Manufacturer Specific
definition for the currently
displayed code is not available,
an advisory message shows on
the Tool’s LCD display.
10. If more than one code was retrieved
press the DTC SCROLL
button, as
necessary, to display additional codes
one at a time.
„
Whenever the Scroll function is used to view additional codes,
the Tool’s communication link with the vehicle’s computer
disconnects. To re-establish communication, press the LINK
button again.
11. Freeze Frame Data (if available) can be viewed at any time (except
button.
MENU mode) by pressing the ENTER/FF
„
In OBD2 systems, when an
emissions-related engine malfunction
occurs that causes a DTC to set, a
record or snapshot of engine
conditions at the time that the
malfunction occurred is also saved in
the vehicle’s computer memory. The
record saved is called Freeze Frame
data. Saved engine conditions
include, but are not limited to: engine speed, open or closed loop
operation, fuel system commands, coolant temperature,
calculated load value, fuel pressure, vehicle speed, air flow rate,
and intake manifold pressure.
OBD2 & 1
27
OBD2 Systems
CODE RETRIEVAL PROCEDURE
If more than one malfunction is present that causes more
than one DTC to be set, only the code with the highest
priority will contain Freeze Frame data. The code
designated “01” on the Tool display is referred to as the
PRIORITY code, and Freeze Frame data always refers to
this code. The priority code is also the one that has
commanded the MIL on.
If Freeze Frame data is not
available for the code shown
on the LCD display when the
ENTER/FF
button is
pressed, an advisory message
shows on the LCD display.
Press the DTC SCROLL
button to return to the previous
code display.
Retrieved information can be uploaded to a Personal
Computer (PC) with the use of an optional “PC Link Kit.”
See instructions included with PC-Link program for more
information.
12. When the last retrieved DTC has been displayed and the DTC
SCROLL
button is pressed, the Tool enters the “enhanced”
mode.
„
See VIEWING ENHANCED DATA on page 29 to view enhanced
DTCs and/or vehicle information for your vehicle.
„
If you do not wish to view enhanced DTCs, press the DTC
SCROLL
button to return to the OBD2 DTC screen.
13. Determine engine system(s) condition by viewing the Tool’s LCD
display for any retrieved Diagnostic Trouble Codes, code definitions,
Freeze Frame data and interpreting the green, yellow and red LEDs.
28
„
If DTC’s were retrieved and you are going to perform the repairs
yourself, proceed by consulting the Vehicle’s Service Repair
Manual for testing instructions, testing procedures, and flow
charts related to retrieved code(s).
„
If you plan to take the vehicle to a professional to have it
serviced, complete the PRELIMINARY VEHICLE DIAGNOSTIC
WORKSHEET on page 14 and take it together with the retrieved
codes, freeze frame data and LED information to aid in the
troubleshooting procedure.
„
To prolong battery life, the Tool automatically shuts “Off”
approximately three minutes after it is disconnected from the
vehicle. The DTCs retrieved, Monitor Status and Freeze Frame
data (if any) will remain in the Tool’s memory, and may be
viewed at any time by turning the unit “On”. If the Tool’s batteries
are removed, or if the Tool is re-linked to a vehicle to retrieve
codes/data, any prior codes/data in its memory are automatically
cleared.
OBD2 & 1
OBD2 Systems
VIEWING ENHANCED DATA
VIEWING ENHANCED DATA
Following the code retrieval procedure (see CODE RETRIEVAL
PROCEDURE on page 23), when the last retrieved DTC has been
displayed and the DTC SCROLL
button is pressed, the Tool enters
the “enhanced” mode. The “enhanced” mode provides the ability to
retrieve enhanced DTCs from most Chrysler/Jeep, Ford/Mazda,
GM/Isuzu, Honda/Acura and Toyota/Lexus vehicles. The types of
enhanced data available depends on the vehicle make.
You can also view vehicle information, which includes the vehicle’s VIN
number, calibration ID(s) and other related information, as well as a list
of available modules for the vehicle.
Vehicle information is available for model year 2000 and newer
OBD2-compliant vehicles only.
The screen shown when the Tool enters the “enhanced” mode depends
on the type(s) of DTC(s) returned during the code retrieval process:
„
If no DTCs were retrieved, or only generic
DTCs were retrieved, the Enhanced
and
Menu displays. Use the UP
buttons, as necessary, to
DOWN
highlight the desired option, then press
the ENTER/FF
button to view the
selected information, or, press the DTC
SCROLL
button to return to the
OBD2 DTC screen.
-
When View Enhanced DTCs is
selected, the Select Manufacturer
and
screen displays. Use the UP
buttons, as necessary, to
DOWN
highlight the appropriate manufacturer, then press the ENTER/FF
button to view enhanced DTCs.
If the manufacturer of the vehicle from which codes were
retrieved is not listed, highlight Exit and press the
ENTER/FF
button to return to the Enhanced Menu
screen. Enhanced DTCs are not available for your vehicle.
„
If a Manufacturer specific DTC was
retrieved, and the manufacturer selected
for the code was Chrysler, Jeep, Ford,
Mazda, General Motors, Isuzu, Honda,
Acura, Toyota or Lexus, the Select Data
and
menu displays. Use the UP
buttons, as necessary, to
DOWN
highlight the desired option, then press
the ENTER/FF
button to view the selected information, or, press
the DTC SCROLL
button to return to the OBD2 DTC screen.
OBD2 & 1
29
OBD2 Systems
VIEWING ENHANCED DATA
„
If a Manufacturer specific DTC was
retrieved, and the manufacturer selected
for the code was not Chrysler, Jeep, Ford,
Mazda, General Motors, Isuzu, Honda,
Acura, Toyota or Lexus, the View Vehicle
Information confirmation message displays.
button to view
Press the ENTER/FF
vehicle information, or, press the DTC
SCROLL
button to return to the OBD2 DTC screen.
Refer to the appropriate paragraph to view enhanced data for your
vehicle:
„
„
„
„
„
Chrysler/Jeep Enhanced DTCs .............page 30
Ford/Mazda Enhanced DTCs ................page 32
GM/Isuzu Enhanced DTCs ....................page 33
Honda/Acura Enhanced DTCs ..............page 35
Toyota/Lexus Enhanced DTCs..............page 36
Refer to VIEWING VEHICLE INFORMATION on page 38 to view
vehicle information for your vehicle.
If vehicle information is not
supported by the vehicle under test,
an advisory message shows on
the Tool’s display. Press the
button to exit.
ENTER/FF
Chrysler/Jeep Enhanced DTCs
When Chrysler/Jeep is selected from the Enhanced DTCs Main menu,
the Chrysler Enhanced menu displays. You may view either “Engine
DTCs” or “Transmission DTCs.”
1. Use the UP
and DOWN
buttons,
as necessary, to highlight the desired
option, then press the ENTER/FF
button.
Transmission DTCs are not supported on most Chrysler/Jeep vehicles manufactured prior to 2002.
„
A “One moment please” message displays while the Tool
retrieves the selected DTCs.
„
If the Tool fails to link to the vehicle’s
computer,
a
“Linking
Failed”
message shows on the Tool’s
display.
-
30
Verify the ignition is ON, then
press the ENTER/FF
button
to continue.
OBD2 & 1
OBD2 Systems
VIEWING ENHANCED DATA
2. To read the display:
Refer to DISPLAY FUNCTIONS on page 11 for a description
of LCD display elements.
„
A visible
icon indicates that the Tool is being powered
through the vehicle’s DLC connector.
„
A visible
icon indicates that the Tool is linked to
(communicating with) the vehicle’s computer.
„
The upper right hand corner of the
display shows the number of the
code currently being displayed, the
total number of codes retrieved.
„
The Diagnostic Trouble Code (DTC)
and related code definition are
shown in the lower section of the
LCD display.
I/M MONITOR STATUS icons are not displayed when
viewing enhanced DTCs.
In the case of long code definitions, or when viewing
Freeze Frame data, a small arrow is shown in the
upper/lower right-hand corner of the code display area
to indicate the presence of additional information. Use
the
and
buttons, as necessary, to view the
additional information.
„
The Tool will display a code only if
codes are present in the vehicle’s
computer memory. If no codes are
present, a “No Enhanced DTC’s are
presently stored in the vehicle’s
computer” is displayed. Press the
button to return to the
ENTER/FF
Chrysler Enhanced menu.
3. If more than one code was retrieved press the DTC SCROLL
button, as necessary, to display additional codes one at a time.
„
Whenever the Scroll function is used to view additional codes, the
Tool’s communication link with the vehicle’s computer disconnects.
To re-establish communication, press the LINK
button again.
4. When the last retrieved DTC has been displayed and the DTC
SCROLL
button is pressed, the Tool returns to the Chrysler
Enhanced menu.
„
To view additional enhanced DTCs, repeat steps 1 through 4, above.
„
To exit the enhanced mode, use the UP
and DOWN
buttons, as necessary, to select Exit from the Chrysler
Enhanced menu, then press the ENTER/FF
button. The
Tool returns to the OBD2 DTC screen.
OBD2 & 1
31
OBD2 Systems
VIEWING ENHANCED DATA
Ford/Mazda Enhanced DTCs
Mazda Enhanced DTCs are available for Mazda-branded
Ford vehicles only.
When Ford/Mazda is selected from the Enhanced DTCs Main menu,
the Ford/Mazda Enhanced menu displays. You may view DTCs for
either the “Continuous Memory Test”, “KOEO (Key On Engine Off) Test”
or “KOER (Key On Engine Running) Test.”
1. Use the UP
and DOWN
buttons,
as necessary, to highlight the desired option, then press the ENTER/FF
button.
When choosing to view KOER
Test DTCs, start the vehicle’s
engine before making your
selection.
„
A “One moment please” message displays, while the Tool
retrieves the selected DTCs.
„
If the Tool fails to link to the vehicle’s
computer,
a
“Linking
Failed”
message shows on the Tool’s
Display.
- Verify the ignition is ON, then
press the ENTER/FF
button
to continue.
„
If the KOER Test was selected, and the vehicle’s engine is not
running, an advisory message shows on the Tool’s display.
- Start the vehicle’s engine, then
press the ENTER/FF
button
to continue.
2. To read the display:
Refer to DISPLAY FUNCTIONS
on page 11 for a description of
LCD display elements.
32
„
A visible
icon indicates that the
Tool is being powered through the vehicle’s DLC connector.
„
A visible
icon indicates that the Tool is linked to
(communicating with) the vehicle’s computer.
„
The upper right hand corner of the
display shows the number of the
code currently being displayed, the
total number of codes retrieved.
„
The Diagnostic Trouble Code (DTC)
and related code definition are
shown in the lower section of the
LCD display.
OBD2 & 1
OBD2 Systems
VIEWING ENHANCED DATA
I/M MONITOR STATUS icons are not displayed when
viewing enhanced DTCs.
In the case of long code definitions, or when viewing
Freeze Frame data, a small arrow is shown in the
upper/lower right-hand corner of the code display area
to indicate the presence of additional information. Use
the
and
buttons, as necessary, to view the
additional information.
„
The Tool will display a code only if
codes are present in the vehicle’s
computer memory. If no codes are
present, a “No Enhanced DTC’s are
presently stored in the vehicle’s
computer” is displayed. Press the
button to return to
ENTER/FF
the Ford/Mazda Enhanced menu.
3. If more than one code was retrieved press the DTC SCROLL
button, as necessary, to display additional codes one at a time.
„
Whenever the Scroll function is used to view additional codes,
the Tool’s communication link with the vehicle’s computer
disconnects. To re-establish communication, press the LINK
button again.
4. When the last retrieved DTC has been displayed and the DTC
SCROLL
button is pressed, the Tool returns to the Ford/Mazda
Enhanced menu.
„
To view additional enhanced DTCs, repeat steps 1 through 4,
above.
„
To exit the enhanced mode, use the UP
and DOWN
buttons, as necessary, to select Exit from the Ford/Mazda
Enhanced menu, then press the ENTER/FF
button. The
Tool returns to the OBD2 DTC screen.
General Motors/Isuzu Enhanced DTCs
When GM/Isuzu is selected from the Enhanced DTCs Main menu, the
GM/Isuzu Enhanced menu displays. You may view the “MIL DTC”,
“Current DTC”, “Fail Since Clear DTC” or “History DTC.”
1. Use the UP
and DOWN
buttons,
as necessary, to highlight the desired
option, then press the ENTER/FF
button.
„
A “One moment please” message
displays while the Tool retrieves the
selected DTCs.
OBD2 & 1
33
OBD2 Systems
VIEWING ENHANCED DATA
„
If the Tool fails to link to the vehicle’s
computer,
a
“Linking
Failed”
message shows on the Tool’s
display.
- Verify the ignition is ON, then
press the ENTER/FF
button
to continue.
2. To read the display:
Refer to DISPLAY FUNCTIONS on page 11 for a description
of LCD display elements.
„
A visible
icon indicates that the Tool is being powered
through the vehicle’s DLC connector.
„
A visible
icon indicates that the Tool is linked to
(communicating with) the vehicle’s computer.
„
The upper right hand corner of the
display shows the number of the
code currently being displayed, the
total number of codes retrieved.
„
The Diagnostic Trouble Code (DTC)
and related code definition are
shown in the lower section of the
LCD display.
I/M MONITOR STATUS icons are not displayed when
viewing enhanced DTCs.
In the case of long code definitions, or when viewing
Freeze Frame data, a small arrow is shown in the
upper/lower right-hand corner of the code display area
to indicate the presence of additional information. Use
the
and
buttons, as necessary, to view the
additional information.
„
The Tool will display a code only if
codes are present in the vehicle’s
computer memory. If no codes are
present, a “No Enhanced DTC’s are
presently stored in the vehicle’s
computer” is displayed. Press the
button to return to
ENTER/FF
the GM Enhanced menu.
3. If more than one code was retrieved press the DTC SCROLL
button, as necessary, to display additional codes one at a time.
„
34
Whenever the Scroll function is used to view additional codes,
the Tool’s communication link with the vehicle’s computer
disconnects. To re-establish communication, press the LINK
button again.
OBD2 & 1
OBD2 Systems
VIEWING ENHANCED DATA
4. When the last retrieved DTC has been displayed and the DTC
SCROLL
button is pressed, the Tool returns to the GM/Isuzu
Enhanced menu.
„
To view additional enhanced DTCs, repeat steps 1 through 4, above.
„
To exit the enhanced mode, use the UP
and DOWN
buttons, as necessary, to select Exit from the GM/Isuzu
Enhanced menu, then press the ENTER/FF
button. The
Tool returns to the OBD2 DTC screen.
Honda/Acura Enhanced DTCs
When Honda/Acura is selected from the
Enhanced
DTCs
Main
menu,
the
Honda/Acura Enhanced menu displays.
Depending on the protocol used to
communicate with your vehicle, the
Honda/Acura Enhanced menu provides
options to view:
„
Permanent DTCs or Temporary DTCs
„
Confirmed DTCs or History DTCs
1. Use the UP
and DOWN
buttons,
as necessary, to highlight the desired
option, then press the ENTER/FF
button.
„
A “One moment please” message
displays while the Tool retrieves the
selected DTCs.
„
If the Tool fails to link to the vehicle’s
computer,
a
“Linking
Failed”
message shows on the Tool’s
display.
-
Verify the ignition is ON, then
press the ENTER/FF
button
to continue.
2. To read the display:
Refer to DISPLAY FUNCTIONS on page 11 for a description
of LCD display elements.
„
A visible
icon indicates that the Tool is being powered
through the vehicle’s DLC connector.
„
A visible
icon indicates that the Tool is linked to
(communicating with) the vehicle’s computer.
„
The upper right hand corner of the display shows the number of
the code currently being displayed, the total number of codes
retrieved.
OBD2 & 1
35
OBD2 Systems
VIEWING ENHANCED DATA
„
The Diagnostic Trouble Code (DTC)
and related code definition are
shown in the lower section of the
LCD display.
I/M MONITOR STATUS
icons are not displayed
when viewing enhanced
DTCs.
In the case of long code definitions, or when viewing
Freeze Frame data, a small arrow is shown in the
upper/lower right-hand corner of the code display area
to indicate the presence of additional information. Use
the
and
buttons, as necessary, to view the
additional information.
„
The Tool will display a code only if
codes are present in the vehicle’s
computer memory. If no codes are
present, a “No Enhanced DTC’s are
presently stored in the vehicle’s
computer” is displayed. Press the
button to return to the
ENTER/FF
Honda/Acura Enhanced menu.
3. If more than one code was retrieved press the DTC SCROLL
button, as necessary, to display additional codes one at a time.
„
Whenever the Scroll function is used to view additional codes,
the Tool’s communication link with the vehicle’s computer
disconnects. To re-establish communication, press the LINK
button again.
4. When the last retrieved DTC has been displayed and the DTC
button is pressed, the Tool returns to the Honda/Acura
SCROLL
Enhanced menu.
„
To view additional enhanced DTCs, repeat steps 1 through 4, above.
„
To exit the enhanced mode, use the UP
and DOWN
buttons, as necessary, to select Exit from the Honda/Acura
Enhanced menu, then press the ENTER/FF
button. The
Tool returns to the OBD2 DTC screen.
Toyota/Lexus Enhanced DTCs
When Toyota/Lexus is selected from the
Enhanced
DTCs
Main
menu,
the
Toyota/Lexus Enhanced menu displays.
Depending on the protocol used to
communicate with your vehicle, the
Toyota/Lexus Enhanced menu provides
options to view:
36
OBD2 & 1
OBD2 Systems
VIEWING ENHANCED DATA
„
Current DTCs or History DTCs
„
Current DTCs, Historical
Readiness DTCs
DTCs
or
1. Use the UP
and DOWN
buttons,
as necessary, to highlight the desired
option, then press the ENTER/FF
button.
„
A “One moment please” message displays, while the Tool
retrieves the selected DTCs.
„
If the Tool fails to link to the vehicle’s
computer, a “Linking Failed” message
shows on the Tool’s Display.
- Verify the ignition is ON, then
press the ENTER/FF
button
to continue.
2. To read the display:
Refer to DISPLAY FUNCTIONS on page 11 for a description
of LCD display elements.
„
A visible
icon indicates that the Tool is being powered
through the vehicle’s DLC connector.
„
A visible
icon indicates that the Tool is linked to
(communicating with) the vehicle’s computer.
„
The upper right hand corner of the
display shows the number of the
code currently being displayed, the
total number of codes retrieved.
„
The Diagnostic Trouble Code (DTC)
and related code definition are shown in
the lower section of the LCD display.
I/M MONITOR STATUS icons are not displayed when
viewing enhanced DTCs.
In the case of long code definitions, or when viewing
Freeze Frame data, a small arrow is shown in the
upper/lower right-hand corner of the code display area
to indicate the presence of additional information. Use
and
buttons, as necessary, to view the
the
additional information.
„
The Tool will display a code only if
codes are present in the vehicle’s
computer memory. If no codes are
present, a “No Enhanced DTC’s are
presently stored in the vehicle’s
computer” is displayed. Press the
button to return to
ENTER/FF
the Toyota/Lexus Enhanced menu.
OBD2 & 1
37
OBD2 Systems
VIEWING VEHICLE INFORMATION
3. If more than one code was retrieved press the DTC SCROLL
button, as necessary, to display additional codes one at a time.
„
Whenever the Scroll function is used to view additional codes,
the Tool’s communication link with the vehicle’s computer
disconnects. To re-establish communication, press the LINK
button again.
4. When the last retrieved DTC has been displayed and the DTC
button is pressed, the Tool returns to the
SCROLL
Toyota/Lexus Enhanced menu.
„
To view additional enhanced DTCs, repeat steps 1 through 4,
above.
„
To exit the enhanced mode, use the UP
and DOWN
buttons, as necessary, to select Exit from the Toyota/Lexus
Enhanced menu, then press the ENTER/FF
button. The
Tool returns to the OBD2 DTC screen.
VIEWING VEHICLE INFORMATION
When you select View Vehicle Info from
the Enhanced Select Data menu, or press
the ENTER/FF
button from the View
Vehicle Information confirmation message
(see VIEWING ENHANCED DATA on page
29), the Vehicle Information menu displays.
The Vehicle Information menu offers two
options for retrieving reference information
for the vehicle under test; Vehicle ID and
Available Modules.
Retrieving Vehicle ID Information
The Vehicle ID function is applicable to model year 2000 and
newer OBD2-compliant vehicles.
The Tool can retrieve a list of information (provided by the vehicle
manufacturer), unique to the vehicle under test, from the vehicle's onboard computer. This information may include:
38
„
The vehicle's VIN number
„
The control module identification number
„
The vehicle's calibration ID(s). These IDs uniquely identify the
software version(s) for the vehicle's control module(s).
„
The Vehicle's Calibration Verification Number(s) (CVNs) required by
ODB2 regulations. CVNs are used to determine if emission-related
calibrations for the vehicle under test have been changed. One or
more CVNs may be returned by the vehicle's computer.
OBD2 & 1
OBD2 Systems
ERASING DIAGNOSTIC TROUBLE CODES (DTCs)
1. On the Vehicle Information menu, use
and DOWN
buttons, as
the UP
necessary, to highlight Vehicle ID, then
press the ENTER/FF
button.
2. A "One moment please..." message
displays while the requested information
is retrieved from the vehicle's computer.
The first time the Vehicle ID function is used, it may take
several minutes to retrieve the information from the vehicle's
computer.
3. When the retrieval process is completed,
the vehicle ID information is shown on
and
the Tool's display. Use the UP
buttons, as necessary, to
DOWN
view the entire list.
4. When you have finished viewing the
retrieved vehicle ID information, press
button to return to exit.
the ENTER/FF
Viewing Available Modules
The Tool can retrieve a list of modules supported by the vehicle under test.
1. From the Vehicle Information menu, use
and DOWN
buttons, as
the UP
necessary,
to
highlight
Available
Modules, then press the ENTER/FF
button.
2. A "One moment please..." message
displays while the requested information
is retrieved from the vehicle's computer.
3. When the retrieval process is completed,
a complete list of modules supported by
the vehicle under test is shown on the
and
Tool's display. Use the UP
buttons, as necessary, to
DOWN
view the entire list.
4. When you have finished viewing the list of available modules, press
button to return to exit.
the ENTER/FF
ERASING DIAGNOSTIC TROUBLE CODES (DTCs)
When the Tool’s ERASE function is used to erase DTCs
from the vehicle's on-board computer, "Freeze Frame" data
and manufacturer-specific enhanced data are also erased.
OBD2 & 1
39
OBD2 Systems
ERASING DIAGNOSTIC TROUBLE CODES (DTCs)
If you plan to take the vehicle to a Service Center for repair, DO NOT
erase the codes from the vehicle's computer. If the codes are erased,
valuable information that might help the technician troubleshoot the
problem will also be erased.
Erase DTCs from the computer's memory as follows:
When DTCs are erased from the vehicle's computer memory, the
I/M Readiness Monitor Status program resets the status of all
Monitors to a not run "flashing" condition. To set all of the Monitors
to a DONE status, an OBD2 Drive Cycle must be performed.
Refer to your vehicle's service manual for information on how to
perform an OBD2 Drive Cycle for the vehicle under test.
The Tool must be connected to the
vehicle’s DLC to erase the codes
from the computer’s memory. If
you press the ERASE
button
when the Tool is not connected to
the vehicle’s DLC, the erase
instruction screen displays.
The Erase function can be performed only from the OBD2
DTC screen. The Erase function cannot be performed while
the Tool is in “enhanced” mode.
1. If not connected already, connect the
Tool to the vehicle's DLC, and turn the
ignition "On.” (If the Tool is already
connected and linked to the vehicle's
computer, proceed directly to step 4. If
not, continue to step 2.)
2. Turn the ignition ON. DO NOT start the
engine.
Press
and
release
the
POWER/LINK
button to establish
communication with the vehicle's computer.
3. Press and release the ERASE
button. A confirmation message shows
on the LCD display.
-
If you are sure you want to proceed
press the ERASE
button again to
erase DTCs from the vehicle’s computer.
-
If you do not want to continue with the
erase process, press the POWER/LINK
button to exit the erase mode.
4. If you chose to erase DTCs, a progress screen displays while the
erase function is in progress.
40
OBD2 & 1
OBD2 Systems
I/M READINESS TESTING
„
If the erase was successful, a
confirmation message shows on the
LCD display. Press the POWER/LINK
button to return to the DTC screen.
„
If the erase was not successful, an
advisory message shows on the
LCD display. Verify that the Tool is
properly
connected
to
the
vehicle’s DLC and that the ignition
is on, then repeat steps 2 and 3,
above.
Erasing DTCs does not fix the
problem(s) that caused the code(s)
to be set. If proper repairs to
correct the problem that caused
the code(s) to be set are not made,
the code(s) will appear again (and the check engine light will
illuminate) as soon as the vehicle is driven long enough for its
Monitors to complete their testing.
I/M READINESS TESTING
I/M is an Inspection and Maintenance program legislated by the
Government to meet federal clean-air standards.
The program requires that a vehicle be taken periodically to an
Emissions Station for an "Emissions Test" or "Smog Check,” where the
emissions-related components and systems are inspected and tested
for proper operation. Emissions Tests are generally performed once a
year, or once every two years.
On OBD2 systems, the I/M program is enhanced by requiring vehicles
to meet stricter test standards. One of the tests instituted by the Federal
Government is called I/M 240. On I/M 240, the vehicle under test is
driven under different speeds and load conditions on a dynamometer for
240 seconds, while the vehicle's emissions are measured.
Emissions tests vary depending on the geographic or regional
area in which the vehicle is registered. If the vehicle is
registered in a highly urbanized area, the I/M 240 is probably
the type of test required. If the vehicle is registered in a rural
area, the stricter “dynamometer type” test may not be required.
I/M Readiness Monitors
I/M Readiness shows whether the various emissions-related systems on
the vehicle are operating properly and are ready for Inspection and
Maintenance testing.
State and Federal Governments enacted Regulations, Procedures
and Emission Standards to ensure that all emissions-related
components and systems are continuously or periodically
monitored, tested and diagnosed whenever the vehicle is in
operation. It also requires vehicle manufacturers to automatically
OBD2 & 1
41
OBD2 Systems
I/M READINESS TESTING
detect and report any problems or faults that may increase the
vehicle's emissions to an unacceptable level.
The vehicle's emissions control system consists of several components
or sub-systems (Oxygen Sensor, Catalytic Converter, EGR, Fuel
System, etc.) that aid in reducing vehicle emissions.
To have an efficient Vehicle Emission Control System, all the emissionsrelated components and systems must work correctly whenever the
vehicle is in operation.
To comply with State and Federal Government regulations, vehicle
manufacturers designed a series of special computer programs called
"Monitors" that are programmed into the vehicle's computer. Each of
these Monitors is specifically designed to run tests and diagnostics on a
specific emissions-related component or system (Oxygen Sensor,
Catalytic Converter, EGR Valve, Fuel System, etc.) to ensure their
proper operation. Currently, there are a maximum of eleven Monitors
available for use.
Each Monitor has a specific function to test and diagnose only
its designated emissions-related component or system. The
names of the Monitors (Oxygen Sensor Monitor, Catalyst
Monitor, EGR Monitor, Misfire Monitor, etc.) describe which
component or system each Monitor is designed to test and
diagnose.
Emissions Inspection and Maintenance (I/M) Readiness
Monitor Status Information
I/M Readiness Monitor Status shows which of the vehicle's Monitors
have run and completed their diagnosis and testing, and which ones
have not yet run and completed testing and diagnosis of their
designated sections of the vehicle's emissions system.
„
If a Monitor was able to meet all the conditions required to enable it
to perform the self-diagnosis and testing of its assigned engine
system, it means the monitor "HAS RUN.”
„
If a Monitor has not yet met all the conditions required for it to
perform the self-diagnosis and testing of its assigned engine system;
it means the Monitor "HAS NOT RUN.”
The Monitor Run/Not Run status does not show whether
or not a problem exists in a system. Monitor status only
indicates whether a particular Monitor has or has not run
and performed the self-diagnosis and testing of its
associated system.
Performing I/M Readiness Quick Check
When a vehicle first comes from the factory, all Monitors indicate a
“HAVE RUN” status. This indicates that all Monitors have run and
completed their diagnostic testing. The “HAVE RUN” status
remains in the computer's memory, unless the Diagnostic Trouble
Codes are erased or the vehicle's computer memory is cleared.
42
OBD2 & 1
OBD2 Systems
I/M READINESS TESTING
The Tool allows you to retrieve Monitor/System Status Infor-mation to
help you determine if the vehicle is ready for an Emissions Test (Smog
Check). In addition to retrieving Diagnostic Trouble Codes, the Tool also
retrieves Monitor Run/Not Run status. This information is very important
since different areas of the state/country have different emissions laws
and regulations concerning Monitor Run/Not Run status.
Before an Emissions Test (Smog Check) can be performed, your
vehicle must meet certain rules, requirements and procedures legislated
by the Federal and state (country) governments where you live.
1. In most areas, one of the requirements that must be met before a
vehicle is allowed to be Emissions Tested (Smog Checked) is that
the vehicle does not have any Diagnostic Trouble Codes present
(with the exception of PENDING Diagnostic Trouble Codes).
2. In addition to the requirement that no Diagnostic Trouble Codes be
present, some areas also require that all the Monitors that a
particular vehicle supports indicate a "Has Run" status condition
before an Emissions Check may be performed.
3. Other areas may only require that some (but not all) Monitors
indicate a "Has Run" status before an Emissions Test (Smog Check)
may be performed.
Monitors with a "Has Run" status indicate that all the
required conditions they needed to perform diagnosis and
testing of their assigned engine area (system) have been
met, and all diagnostic testing has completed
successfully.
Monitors with a "Has Not Run" status have not yet met
the conditions they need to perform diagnosis and
testing of their assigned engine area (system), and have
not been able to perform diagnostic testing on that
system.
The green, yellow and red LEDs provide a quick way to help you
determine if a vehicle is ready for an Emissions Test (Smog Check).
Follow the instructions below to perform the Quick Check.
Perform the CODE RETRIEVAL PROCEDURE as described on page
23, then interpret the LED indications as follows:
Interpreting I/M Readiness Test Results
1. GREEN LED - Indicates that all engine
systems are "OK" and operating
normally (all Monitors supported by the
vehicle have run and performed their
self-diagnostic testing). The vehicle is
ready for an Emissions Test (Smog
Check), and there is a good possibility
that it can be certified.
2. YELLOW LED - Determine from the CODE RETRIEVAL
PROCEDURE (page 23) which of the two possible conditions is
causing the yellow LED to light.
OBD2 & 1
43
OBD2 Systems
I/M READINESS TESTING
„
If a "PENDING" Diagnostic Trouble
Code is causing the yellow LED to
light, it is possible that the vehicle
will be allowed to be tested for
emissions and certified. Currently,
most areas (states) will allow an
Emissions Test (Smog Check) to be
performed if the only code in the
vehicle's computer is a "PENDING"
Diagnostic Trouble Code.
„
If the illumination of the Yellow LED
is being caused by monitors that
“have not run” their diagnostic
testing, then the issue of the vehicle
being ready for an Emissions Test
(Smog Check) depends on the
emissions regulations and laws of
your local area.
- Some areas require that all Monitors indicate a "Has Run"
status before they allow an Emissions Test (Smog Check) to
be performed. Other areas only require that some, but not all,
Monitors have run their self-diagnostic testing before an
Emissions Test (Smog Check) may be performed.
From the code retrieval procedure, determine the status of
each Monitor (a solid Monitor icon shows Monitor "Has Run"
status, a flashing Monitor icon indicates "Has Not Run" status).
Take this information to an emissions professional to
determine (based on your test results) if your vehicle is ready
for an Emissions Test (Smog Check).
3. RED LED - Indicates there is a problem
with one or more of the vehicle's
systems. A vehicle displaying a red LED
is definitely not ready for an Emissions
Test (Smog Check). The red LED is
also an indication that there are
Diagnostic Trouble Code(s) present
(displayed on the Tool's screen). The
Multifunction Indicator (Check Engine)
Lamp on the vehicle's instrument panel
will light steady. The problem that is causing the red LED to light
must be repaired before an Emissions Test (Smog Check) can be
performed. It is also suggested that the vehicle be
inspected/repaired before driving the vehicle further.
If the Red LED was obtained, there is a definite problem present in
the system(s). In these cases, you have the following options.
„
44
Repair the vehicle yourself. If you are going to perform the
repairs yourself, proceed by reading the vehicle service
manual and following all its procedures and recommendations.
OBD2 & 1
OBD2 Systems
I/M READINESS TESTING
„
Take the vehicle to a professional to have it serviced. The
problem(s) causing the red LED to light must be repaired
before the vehicle is ready for an Emissions Test (Smog
Check).
Using the I/M Readiness Monitor Status to Confirm a Repair
The I/M Readiness Monitor Status function can be used (after
repair of a fault has been performed) to confirm that the repair has
been performed correctly, and/or to check for Monitor Run Status.
Use the following procedure to determine I/M Readiness Monitor
Status:
1. Using retrieved Diagnostic Trouble Codes (DTCs) and code
definitions as a guide, and following manufacturer's repair
procedures, repair the fault or faults as instructed.
2. After the fault or faults have been repaired, connect the Tool to the
vehicle's DLC and erase the code or codes from the vehicle's
computer memory.
„
See page 29 for procedures to erase DTCs from the vehicle's
on-board computer.
„
Write the codes down on a piece of paper for reference before
erasing.
3. After the erase procedure is performed, most of the Monitor icons on
the Tool’s LCD display will be flashing. Leave the Tool connected to
the vehicle, and perform a Trip Drive Cycle for each "flashing"
Monitor:
Misfire, Fuel and Comprehensive Component Monitors run
continuously and their icons will always be on solid, even after
the erase function is performed.
„
Each DTC is associated with a specific Monitor. Consult the
vehicle's service manual to identify the Monitor (or Monitors)
associated with the faults that were repaired. Follow the
manufacturer's procedures to perform a Trip Drive Cycle for the
appropriate Monitors.
„
While observing the Monitor icons on the Tool’s LCD display,
perform a Trip Drive Cycle for the appropriate Monitor or
Monitors.
WARNING: If the vehicle needs to be driven in order to perform a
Trip Drive Cycle, ALWAYS have a second person help you. One
person should drive the vehicle while the other person observes
the Monitor icons on the Tool for Monitor RUN status. Trying to
drive and observe the Tool at the same time is dangerous, and
could cause a serious traffic accident.
4. When a Monitor's Trip Drive Cycle is performed properly, the
Monitor icon on the Tool’s LCD display changes from "flashing" to
"solid,” indicating that the Monitor has run and finished its diagnostic
testing.
OBD2 & 1
45
OBD2 Systems
I/M READINESS TESTING
46
„
If, after the Monitor has run, the MIL on the vehicle's dash is not
lit, and no stored or pending codes associated with that
particular Monitor are present in the vehicle's computer, the
repair was successful.
„
If, after the Monitor has run, the MIL on the vehicle's dash lights
and/or a DTC associated with that Monitor is present in the
vehicle's computer, the repair was unsuccessful. Refer to the
vehicle's service manual and recheck repair procedures.
OBD2 & 1
Chrysler/Jeep OBD1 Systems
CHRYSLER/JEEP OBD1 SYSTEMS
CHRYSLER/JEEP OBD1 SYSTEMS
Chrysler Motors On-Board Computer Systems
Chrysler Motors introduced its first electronic fuel injected vehicle in late
1983. The on-board computer management systems used on Chrysler
vehicles have evolved over the years, and their names have changed
accordingly.
1983-87: The on-board computer used in these vehicles is a splitsystem, composed of two separate units: the Logic Module and the
Power Module. The Logic Module contains a microprocessor which
processes data received from sensors located throughout the vehicle
and makes decisions (based on these inputs) which effect engine
operation. The Logic Module is usually located on the right-hand side,
behind the kick panel. The Power Module supplies operating power to
the Logic Module, and contains the circuits which control the highcurrent devices. Power Module operation is controlled by the Logic
Module. The Power Module is located in the engine compartment, near
the vehicle’s battery.
1987-90: This system is called a Single Module Engine Controller
(SMEC). This system still uses two separate circuit boards (Logic
Module and Power Module). However, both circuit boards are located in
a common enclosure.
1989-95: This system is called a Single Board Engine Controller
(SBEC). On this system, the Logic Module and Power Module circuit
boards are integrated on a single circuit board.
1993-97:
Beginning in 1993, the computer was renamed the
Powertrain Control Module (PCM). In addition to controlling the engine
management system and emission system, the computer also takes
an active role in controlling powertrain (transmission system)
operation.
Unless otherwise specified, all references to “computer” within
this manual also apply to “Logic Module/ Power Module”,
“SMEC”, “SBEC” or “PCM”.
Jeep On-Board Computer Systems
1993-95: In 1993, Jeep on-board computer systems (fuel injected
vehicles only) were converted to the Chrysler on-board computer
systems. All 1993 through 1995 fuel injected Jeep and Chrysler vehicles
are equipped with similar on-board computer systems.
OBD2 & 1
47
Chrysler/Jeep OBD1 Systems
VEHICLES COVERED / PANEL INDICATOR LIGHTS / DLC
VEHICLES COVERED
This section covers Chrysler fuel injected vehicles from 1983-1995.
Type
Passenger
Cars
Light Truck
and Vans
Jeep
Model
Year
1983-1995
1987-1995
1992-1995
1993-1995
Model
Chrysler, Dodge and Plymouth Fuel
Injected Models Only (Excluding
Laser/Talon 1.8L, 2.0L (ALL YEARS), 1990
Monaco/Premier, 1993-1995 Intrepid, LHS,
Concorde and Vision, 1995 Avenger,
Stealth (ALL YEARS) and Cirrus 2.5L (ALL
YEARS))
Chrysler, Dodge and Plymouth Fuel
Injected Models Only
Diesel Models
Jeep Fuel Injected Models Only
INSTRUMENT PANEL INDICATOR LIGHTS
Your vehicle’s instrument panel has either a “Power Loss”, “Check
Engine” or “Malfunction Indicator Lamp”, depending on the year of the
vehicle. These lights are designed to warn you of component
malfunctions.
POWER
LOSS
CHECK
ENGINE
MALFUNCTION
INDICATOR
LAMP
If your instrument panel indicator lights do not come on when
you turn on the ignition, please refer to your vehicle’s service
manual. You may have problems in the car’s circuitry. It is
recommended that you fix these problems before retrieving
DTC’s from your vehicle’s computer.
DATA LINK CONNECTOR (DLC)
Chrysler vehicles are equipped with special
test connectors that make it possible to
connect specialized testing equipment that
communicates with the vehicle’s on-board
computer. Chrysler’s vehicle test connectors
are usually dark in color (BLACK or GREY)
and are located under the hood.
48
OBD2 & 1
Chrysler/Jeep OBD1 Systems
CODE RETRIEVAL PROCEDURE
CODE RETRIEVAL PROCEDURE
Retrieving and using Diagnostic Trouble Codes (DTCs) for
troubleshooting vehicle operation is only one part of an
overall diagnostic strategy.
Never replace a part based only on the DTC
definition. Each DTC has a set of testing procedures,
instructions and flow charts that must be followed to
confirm the location of the problem. This information
is found in the vehicle’s service manual. Always refer to
the vehicle’s service manual for detailed testing
instructions.
Check your vehicle thoroughly before performing
any test. See BEFORE YOU BEGIN on page 17 for details.
ALWAYS observe safety precautions whenever working on a
vehicle. See Safety Precautions on page 3 for more information.
1. Locate the vehicle’s Data Link Connector (DLC). See Data Link
Connector (DLC) on page 48 for connector location.
Some DLCs have a plastic cover that must be removed before
connecting the Tool’s cable connector.
2. Connect the Tool cable (with the
Chrysler Connector Cable Adaptor
attached) to the Tool, then connect the
adaptor to the vehicle’s DLC. Press the
POWER/LINK
button to turn the
Tool ON.
„
Set the parking brake, and make
sure all vehicle accessories are
turned off.
3. Turn the ignition ON. DO NOT start the
engine. Press the ENTER/FF
button to continue.
4. Select the model year of the vehicle
from which you wish to retrieve codes:
If a previous vehicle selection is currently saved in the Tool's
memory, the "Current Selection/Select New Vehicle" menu
displays. If no previous vehicle selection is stored in the Tool's
and
memory, "Select New Vehicle" displays. Use the
buttons, as necessary, to make your selection.
„
To retrieve DTCs from the vehicle selection currently in the
Tool’s memory:
OBD2 & 1
49
Chrysler/Jeep OBD1 Systems
CODE RETRIEVAL PROCEDURE
- From the “Current Selection/
Select New Vehicle” screen,
highlight Current Selection and
press the ENTER/FF
button.
- Proceed to step 5 to continue.
„
To retrieve DTCs from a new
vehicle:
- From the “Current Selection/Select
New Vehicle” screen, highlight
Select New Vehicle and press the
ENTER/FF
button; the “Select
Vehicle Year” menu displays.
- Highlight the desired year, then
press the ENTER/FF
button.
The “Current Selection/Select New Vehicle” screen displays
for your confirmation.
FCC - means 1994 Four Cylinder Control Module for
the 1994 Chrysler vehicles.
- If the year shown in the “Current Selection” field is correct,
highlight Current Selection and press the ENTER/FF
button. Proceed to step 5 to continue.
If the year shown is not correct, highlight Select New
button to return to
Vehicle and press the ENTER/FF
the “Select Vehicle Year” menu to make your corrections.
5. Prepare the vehicle to retrieve codes:
„
For 1988-1995 Chrysler/Jeep vehicles: The Tool will automatically
begin the code retrieval process. Proceed to step 6 to continue.
„
For 1984-1988 Chrysler vehicles ONLY: WITHOUT starting the
engine, turn ignition ON, OFF, ON, OFF and ON again within 5 seconds
to activate the code retrieval process. Proceed to step 6 to continue.
6. When the Tool is in the process of
retrieving codes, a “One Moment
Please...” message shows on the Tool’s
LCD display.
„
If the Tool fails to link to the vehicle’s
computer, a “Vehicle is not
responding” message shows on the
Tool’s LCD display. Do the following:
- Verify the ignition is ON.
- Check the cable connections at
the Tool and at the vehicle’s DLC.
- Turn the ignition OFF, wait 10-12
seconds, then turn back ON to
reset the computer.
50
OBD2 & 1
Chrysler/Jeep OBD1 Systems
CODE RETRIEVAL PROCEDURE
- Press the ENTER/FF
as necessary.
button and repeat steps 4 through 6
7. If the Tool was able to link to the vehicle
successfully a "Code retrieval was
successful..." message shows temporarily on the Tool’s LCD display followed
by any retrieved DTCs.
„
The Tool will display a code only if
codes are present in the vehicle's
computer memory. If no codes are
present, a "No DTC's are presently
stored in the vehicle's computer"
message is displayed.
8. If more than one code was retrieved
press the DTC SCROLL
button, as
necessary, to display additional codes
one at a time.
In the case of long code definitions, a small arrow is shown in
the upper/lower right-hand corner of the code display area to
indicate the presence of additional information. Use the
buttons, as necessary, to view the additional
and
information.
9. Disconnect the Tool from the vehicle and turn the ignition key OFF.
10. To prolong battery life, the Tool automatically shuts "Off" after
approximately three minutes of no button activity. The DTCs
retrieved will remain in the Tool's memory, and may be viewed at
any time. If the Tool’s batteries are removed, or if the Tool is relinked to a vehicle to retrieve codes, any prior codes in its memory
are automatically cleared.
„
See VIEWING DTCs IN THE TOOL’S MEMORY on page 13 to
view DTCs stored in the Tool’s memory.
11. Follow the testing and repair procedures outlined in the vehicle's
service repair manual to correct "hard" DTCs. Codes should be
addressed and eliminated in the order they were received, erasing
(see Erasing DTCs on page 88) and retesting after each repair is
made to be sure the fault was eliminated.
The green, yellow and red LEDs are used (with the LCD
display) as visual aids to make it easier to determine engine
system conditions. See Servicing DTCs on page 86 for
information on interpreting LEDs and servicing DTCs.
OBD2 & 1
51
Ford OBD1 Systems
FORD COMPUTER SYSTEM OVERVIEW - VEHICLES COVERED
FORD COMPUTER SYSTEM OVERVIEW
The Enhanced OBD2 & 1 Tool is compatible only with EEC-IV
Computer Control systems.
IMPORTANT: When the computer is in Self-Test mode (is
testing the sensors or actuators for proper operation), it relies
on voltage signals that is sends to and / or receives from the
sensors or actuators to determine whether or not these
components are operating properly. The sensors and
actuators are all connected to the computer by wires. If any
defects are present in any part of the circuit that connects
these devices to the computer (such as defective connectors
or wires, faulty grounds, improper voltage, shorts etc.), the
voltage signal that the computer receives from these devices
will be affected. The computer has no way of determining if
the improper voltage signal is being caused by a defect in the
circuit or by the sensors or actuators themselves. Keep this in
mind when servicing fault codes, and do not replace any
devices (sensors or actuators) before checking the complete
circuit (or circuits) that are part of the device from which the
code was generated.
VEHICLES COVERED
CAR - Ford, Lincoln, Mercury Computer System/Tool Application
Table
The following table lists the year and model of all the cars that are
covered by the OBD2 & 1 Tool.
8th
VIN
Digit**
Fuel Systems
(Carburetor
Model)
1.6L I-4
5, 2
EFI, EFI Turbo
2.3L I-4
5
EFI Turbo
R, J
FBC (6149)*
1.6L I-4
4, 5, 8
EFI EFI Turbo
Escort, EXP, Lynx
2.3L I-4
2.3L I-4 OHC
A, J, R
FBC
(YFA)* (6149)*
Capri, Cougar, LTD, Marquis,
Mustang, Tempo, Topaz
2.3L I-4
T, W
EFI Turbo
Capri, Cougar, Merkur XR4Ti,
Mustang, T-Bird
2.3L I-4 HSC
S, X
CFI
Tempo, Topaz
3
CFI
Capri, Cougar, LTD, Marquis,
Mustang, T-Bird
Engine
Computer
System
Application/Special Notes
1981-1982
2.3L I-4 HSC
EEC-IV
Escort, EXP, LN7, Lynx
Capri, Cougar, Mustang, TBird
Capri, Fairmont, LTD, Marquis,
Mustang, Tempo, Topaz,
Zephyr
1984-1986
3.8L V-6
52
EEC-IV
OBD2 & 1
Ford OBD1 Systems
VEHICLES COVERED - CARS
8th
VIN
Digit**
Fuel Systems
(Carburetor
Model)
5.0L V-8
F, M
CFI, SEFI
1.9L I-4
J, 9
EFI, CFI, SFI
2.0L I-4
A
SEFI
2.3L I-4
A
FBC (YFA)*
Engine
Application/Special Notes
Computer
System
1984-1986 (Cont)
Capri, Continental, Colony
Park, Cougar, Country Squire,
Crown Victoria, Grand
Marquis, LTD, Mark VII,
Marquis, Mustang, T-Bird,
Town Car
EEC-IV
1987-1993
Escort, EXP, Lynx, Tracer
Capri, LTD, Marquis, Mustang
(1996 models)
2.3L I-4 OHC
A, M
EFI
2.3L I-4
T, W
EFI Turbo
2.3L I-4 HSC
S, X
CFI, EFI, SEFI
Tempo, Topaz
D
EFI, CFI
Sable, Taurus
3.0L V-6
3.0L V-6 SHO
1, U, Y
EFI, SEFI, SFI
Probe, Sable, Taurus, Tempo,
Topaz (VIN 1 Taurus models
are Flexible Fuel)
3.8L V-6
3, 4, C,
R
CFI, EFI, SFI
Capri, Continental, Cougar,
LTD, Marquis, Mustang, Sable,
T-Bird,Taurus
4.6L V-8
W, V
SEFI
Crown Victoria, Grand
Marquis, Mark VII, Town Car
5.0L V-8
F, M,
E, T,
D, 4
SEFI
Capri, Continental, Cougar,
Crown Victoria, Grand Marquis,
Mark VII, Mustang, Mustang
Cobra, T-Bird, Town Car
1.9L I-4
J
SFI
Escort, Topaz, Tracer
2.0L I-4
A
SFI
Probe
3.0L V-6
1, U, Y
SFI
Sable, Taurus, Tempo (VIN 1
Taurus models are Flexible Fuel)
4
R
SFI
Continental, Cougar, Sable,
Taurus, T-Bird
4.6L V-8
W, V
SFI
Crown Victoria, Grand
Marquis, Mark VIII, Town Car
5.0L V-8
T, D
SFI
2.5L I-4
EEC-IV
Probe (1993 manual
transmission only)
Mustang
Capri, Cougar, Merkur,
Mustang, T-Bird, XR4Ti
1994
3.8L V-6
3.8L V-6 SC
EEC-IV
Mustang, Mustang Cobra
1995
1.9L I-4
J
SFI
Escort, Tracer
2.0L I-4
A, 3
SFI
Contour, Mystique, Probe
2.5L V-6
L
SFI
Contour, Mystique
3.0L V-6
1, U
SFI
Sable, Taurus (VIN 1 Taurus
models are Flexible Fuel)
SFI
Cougar, Sable, Taurus, T-Bird
3.0L V-6 SHO
Y
3.8L V-6
4
3.8L V-6 SC
R
OBD2 & 1
EEC-IV
53
Ford OBD1 Systems
VEHICLES COVERED - TRUCKS/VANS
Engine
8th
VIN
Digit**
Fuel Systems
(Carburetor
Model)
4.6L V8 DOHC
V
SFI
Mark VIII
5.0L V-8 HO
T
SFI
Mustang
5.0L V-8 SHP
D
Computer
System
Application/Special Notes
1995 (Cont)
EEC-IV
NOTES
* Carburetor Model. Carburetor model numbers are usually stamped on top of the
carburetor, or on a metal tab attached to the carburetor. Consult your vehicle’s repair manual
for proper identification.
**VIN Number. The VIN number(s) used in this column identify the vehicle’s engine type.
This number is the 8th digit of the VIN (Vehicle Identification Number). Consult your vehicle’s
repair manual for details.
Application Table Definitions. CFI = Central Fuel Injection; DOHC = Dual Overhead Cam;
EFI = Electronic Fuel Injection; FBC = Feedback Carburetor; HSC = High Swirl Combustion;
MFI = Multiport Fuel Injection; OHC = Overhead Cam; SC = Super Charged; SEFI =
Sequential Electronic Fuel Injection; SFI = Sequential Fuel Injection; SHO = Super High
Output
TRUCKS/VANS - Ford Computer System Tool Application Table
The following table lists the year and model of all the trucks and vans
that are covered by the OBD2 & 1 Tool.
Engine
8th
VIN
Digit**
Fuel Systems
(Carburetor
Model)
S
FBC (2150A)*
Computer
System
Application/Special Notes
1983
2.8L V-6
Bronco II and Ranger Pickup
EEC-IV
1984
2.8L V-6
S
FBC (2150A)*
4.9L I-6
Y
FBC (YFA)*
5.0L V-8
F
FBC (2150A)*
5.8L V-8
G
FBC (2150A)*
2.3L I-4 OHC
A
EFI
2.9L V-6
T
EFI
2.8L V-6
S
FBC (2150A)*
4.9L I-6
Y, 9
FBC (YFA)*,
EFI
5.0L V-8
5.0L V-8
F
N
FBC (2150A)*
EFI
5.8L V-8
G
FBC (2150A)*
7.3L V-8
M
Diesel
7.5L V-8
G
EFI
2.3L I-4 OHC
A
EFI, MFI
2.9L V-6
T
EFI
3.0L V-6
U
EFI, SEFI, SFI
EEC-IV
Bronco II, Ranger Pickup
Bronco, E and F Series
Trucks/Vans (8500 lb. GVW or
less only)
1985-1990
EEC-IV
Aerostar, Bronco II, Ranger
(excluding Diesel)
Bronco, E and F Series
Trucks/Vans (8500 lb. GVW or
less only)
E and F Series Trucks/Vans
(8500 lb. GVW or less only)
1991-1994
54
Ranger
EEC-IV
Aerostar, Ranger
OBD2 & 1
Ford OBD1 Systems
VEHICLES COVERED – TRUCKS/VANS - TEST CONNECTORS
8th
VIN
Digit**
Fuel Systems
(Carburetor
Model)
4.0L V-6
X
EFI, MFI
4.9L I-6
Y, H
EFI, MFI, SFI
5.0L V-8
N
EFI, MFI, SFI
5.8L V-8
H, R
EFI, MFI, SFI
7.3L V-8
M
Diesel
7.3L V-8
K
Turbo Diesel
7.5L V-8
G
EFI, MFI
3.0L V-6
U
SFI
Engine
Application/Special Notes
Computer
System
1991-1994 (Cont)
Aerostar, Explorer, Ranger
EEC-IV
Bronco, E and F Series
Trucks/Vans (8500 lb. GVW or
less only)
E and F Series Trucks/Vans
(Excludes 1994 diesel models)
1995
Aerostar (Excludes Explorer,
Ranger and Windstar)
4.0L V-6
X
SFI
4.9L I-6
Y
SFI
E and F series Trucks and
Vans (Excludes Natural Gas
equipped vehicles)
Bronco, E and F series Trucks
and Vans
5.0L V-8
N
SFI
5.8L V-8
H, R
MFI
7.5L V-8
G
MFI
EEC-IV
E-350; F-250-350 (Excludes
California ); F-Super Duty
(Excludes Diesel)
NOTES
* Carburetor Model. Carburetor model numbers are usually stamped on top of the carburetor, or on a metal tab attached to the carburetor. Consult your vehicle’s repair manual for
proper identification.
**VIN Number. The VIN number(s) used in this column identify the vehicle’s engine type.
This number is the 8th digit of the VIN (Vehicle Identification Number). Consult your vehicle’s
repair manual for details.
Application Table Definitions. EFI = Electronic Fuel Injection; FBC = Feedback Carburetor;
MFI = Multiport Fuel Injection; OHC = Overhead Cam; SC = Super Charged; SEFI =
Sequential Electronic Fuel Injection; SFI = Sequential Fuel Injection
TEST CONNECTORS
Ford vehicles are equipped with
special test connectors that make
it possible to connect specialized
testing
equipment
that
communicates with the vehicle's
onboard computer. Ford's vehicle
test connectors are usually dark in
color
(BLACK
or
GREY).
Sometimes they have a plastic
cover over them or are labeled
EEC Test. The connectors can be
found in the following general
locations in the engine compartment:
OBD2 & 1
6-PIN
SINGLE
PIN
EEC-IV TEST CONNECTOR
55
Ford OBD1 Systems
CONNECTING THE TOOL – DIAGNOSTIC TROUBLE CODES (DTCs)
„
Near the front corner (right or left).
„
Near the fender well (right or left).
„
Near the fire wall (right or left).
CONNECTING THE TOOL
The Tool's Ford Connector Cable Adaptor is designed to
match the vehicle's computer DLC. When properly connected,
the vehicle's DLC should match the pre-molded guides around
the adaptor. Make sure the adaptor and the vehicle's DLC
mate properly before applying force. Forcing the adaptor onto
the DLC improperly may result in damage to the adaptor
and/or Tool, and possible damage to the vehicle's computer
system.
„
Connect the Tool to BOTH.
1. large, six pin female connector with
molded housing
2. small, single pin female connector
EEC-IV
TEST
CONNECTOR
1988 and newer vehicles
may have more than one
similar connector for other
systems
(i.e.
Anti-Lock
CODE
Brakes). Only the connector
READER
with an extra single pin is the
correct test connector for
computer service codes use. If you have any questions about
the correct connector, please refer to your vehicle's service
manual for detailed information.
DIAGNOSTIC TROUBLE CODES (DTCs)
Diagnostic Trouble Codes, or Fault Codes, can be used to identify
engine systems or components that are malfunctioning. The computer
records codes for two types of problems:
„
"Hard" Diagnostic Trouble Codes
"Hard" DTCs represent problems which are happening now and
cause the instrument panel Malfunction Indicator Lamp (MIL) or
Check engine light to illuminate and remain on until the failure is
repaired. A DTC is stored in the vehicle's computer memory for
each fault detected. A Tool or Scanner can be used to retrieve
DTCs that are stored in the vehicle's computer memory.
„
Intermittent/History DTCs
Intermittent/History DTCs are stored in the computer's memory for
problems that occur intermittently, or for problems that happened in
the past but are not currently present. Intermittent DTCs may cause
the Malfunction Indicator light to flicker or stay on until the
intermittent malfunction goes away. However, the corresponding
56
OBD2 & 1
Ford OBD1 Systems
CODE RETRIEVAL PROCEDURES - OVERVIEW - KOEO TEST
fault code will be stored in memory as a history DTC. If the
malfunction that caused the history DTC to set does not recur within
a predetermined length of time (usually within 40-80 ignition key
start cycles), the computer will automatically erase the related fault
code from its memory.
CODE RETRIEVAL PROCEDURES
Overview of Ford Code Retrieval Process
Ford's computer self-diagnostic system is divided into four main
sections:
1. "Key On Engine Off" (KOEO) Self-Test
2. "Continuous Memory" (CM) Self-Test
3. "Key On Engine Running" (KOER) Self-Test
4. Other EEC-IV System tests
These Self-Tests are specially designed to monitor and/or test the
various components and circuits that are controlled by the vehicle's
computer, and to save and/or transmit diagnostic test results to the Tool
in the form of numerical fault codes.
The "Continuous Memory" Self-Test is designed to run continuously
whenever the vehicle is normal operation. If a fault is detected by the
"Continuous Memory" Self-Test, a fault code is saved in the vehicle's
computer memory for later retrieval.
Ford’s On-Board Diagnostic Self-Tests are designed in such a way that
in order to properly diagnose a problem, you must perform all the SelfTests, in the proper sequence.
As described previously, some tests are designed to detect problems
only when the vehicle is in normal operation. Some tests are designed
to activate components and detect problems only with the Key On and
Engine Off. Other tests are designed to activate components and test
their operation only with the Key On and Engine Running. Do not take
short cuts. If you fail to perform a test, or you perform a test out of
sequence, you might miss a problem that is only detected during that
part of the test.
Key On Engine Off (KOEO) Test
During the KOEO Self-Test, two groups of codes are retrieved by the
Tool.
„
The first group of codes retrieved by the Tool are called "KOEO
codes". A "KOEO" icon will show in the upper right corner of the
LCD display to indicate that the code retrieved is a "KOEO" code.
„
The second group of codes are called "Continuous Memory" codes.
A "CM" icon will show in the upper right corner of the LCD display to
indicate that the code retrieved is a "Continuous Memory" code.
OBD2 & 1
57
Ford OBD1 Systems
CODE RETRIEVAL PROCEDURES - KOEO TEST
Check your vehicle thoroughly before performing any test. See
BEFORE YOU BEGIN on page 17 for details.
ALWAYS observe safety precautions whenever working on a
vehicle. See Safety Precautions on page 3 for more information.
1. Locate the vehicle's Data Link Connector (DLC). See TEST
CONNECTORS on page 55 for connector location.
Some DLCs have a plastic cover that must be removed before
connecting the Tool's cable connector.
2. Connect the Tool cable (with the Ford
Connector Cable Adaptor attached) to
the Tool, then connect the adaptor to
the
vehicle's
DLC.
Press
the
POWER/LINK
button to turn the
Tool ON, then press the ENTER/FF
button to continue.
„
The Ford EEC-IV System menu
displays.
Use the
and
buttons, as
necessary, to make menu selections.
3. From the Ford EEC-IV System menu,
highlight KOEO Test, then press the
button.
ENTER/FF
4. Start and warm-up engine to normal operating temperature. Press
button to continue.
the ENTER/FF
5. Turn ignition key OFF and wait for the on screen prompt. If you wish
button.
to exit the KOEO test at this time, press the ENTER/FF
6. If your vehicle is equipped with one of the following engine types,
perform the added procedures described below:
„
For 4.9L engines with standard transmission: Press and hold
the clutch until all codes are sent (steps 7 through 9).
„
For 7.3L diesel engines: Press and hold accelerator until all
codes are sent (steps 7 through 9).
„
For 2.3L turbo engines with octane switch: Put switch in
premium position.
7. Turn ignition ON. DO NOT start the
engine. Press the ENTER/FF
button
to continue.
8. While codes are being retrieved, a "One
moment please KOEO test is in
progress..." message shows on the
Tool's LCD display.
58
OBD2 & 1
Ford OBD1 Systems
CODE RETRIEVAL PROCEDURES - KOEO TEST
As soon as the ignition is turned "on", the vehicle's computer
enters the Self-Test mode. Clicking sounds will be heard
coming from the engine. This is normal. It indicates that the
vehicle's computer is activating relays, solenoids, and other
components to check their operation.
WARNING: On some vehicles equipped with an Electric
Cooling Fan, the computer activates the cooling fan to
check its operation. To avoid injury, keep hands or any
part of your body a safe distance from the engine during
this test.
„
If the Tool fails to link to the
vehicle's computer, a "Vehicle is not
responding" message shows on the
Tool's LCD display. Do the following:
- Verify the ignition is ON.
- Check the cable connections at
the Tool and at the vehicle's DLC.
- Turn the ignition OFF, wait 10 seconds, then turn back ON to
reset the computer.
BE SURE to perform the added procedures in step 6, if
appropriate for your vehicle, BEFORE turning the
ignition ON.
- Press ENTER/FF
button to continue.
9. If the Tool was able to link to the vehicle successfully a "Code
retrieval was successful..." message shows temporarily on the
Tool's LCD display followed by any retrieved DTCs.
„
The Tool will display a code only if
codes are present in the vehicle's
computer memory.
„
If no problems are found during the
KOEO Self-Test, the computer
sends a "PASS" code (code 11 or
111) to the Tool.
„
If no Continuous Memory codes are
present in the vehicle's computer
memory, the Tool will display a
"PASS" code (code 11 or 111).
Most
Ford
EEC-IV
vehicle
computers up to 1991 use a twodigit code system. From 1991 to
1995 most use a three digit code
system.
10. If more than one code was retrieved, press DTC SCROLL
button, as necessary, to display additional codes one at a time.
OBD2 & 1
59
Ford OBD1 Systems
CODE RETRIEVAL PROCEDURES – ENGINE TIMING CHECK
In the case of long code definitions, a small arrow is shown in
the upper/lower right-hand corner of the code display area to
indicate the presence of additional information. Use the
buttons, as necessary, to view the additional
and
information.
11. Disconnect the Tool from the vehicle and turn the ignition key OFF.
12. To prolong battery life, the Tool automatically shuts "Off" after
approximately three minutes of no button activity. The DTCs
retrieved will remain in the Tool's memory, and may be viewed at
any time. If the Tool's batteries are removed, or if the Tool is relinked to a vehicle to retrieve codes, any prior codes in its memory
are automatically cleared.
„
See VIEWING DTCs IN THE TOOL’S MEMORY on page 13 to
view DTCs stored in the Tool's memory.
13. Follow the testing and repair procedures outlined in the vehicle's
service repair manual to correct "hard" DTCs. Codes should be
addressed and eliminated in the order they were received, erasing
(see Erasing DTCs on page 88) and retesting after each repair is
done to be sure the fault was eliminated.
IMPORTANT: DO NOT service "Continuous Memory" codes
at this time. Before "Continuous Memory" codes can be
serviced, both the KOEO and the KOER Self-Tests must pass
(a PASS code 11 or 111 is obtained). After both of these tests
have passed, erase the vehicle's computer memory (see
Erasing DTCs on page 88), take the vehicle for a short drive,
then repeat the KOEO Self-Test. If any Continuous Memory
faults are present, service them all this time. Consult the
vehicle's service repair manual for servicing Continuous
Memory Fault Codes.
The green, yellow and red LEDs are used (with the LCD
display) as visual aids to make it easier to determine engine
system conditions. See Servicing DTCs on page 86 for
information on interpreting LEDs and servicing DTCs.
Do not proceed to the ignition timing check procedure or the
KOER test until a PASS code (code 11 or 111) for KOEO test
is obtained.
Engine Timing Check
Before performing the KOER Self-Test, the vehicle's Ignition
Base Timing and the computer's ability to electronically control
timing advance must be checked for proper operation.
Maladjustment of ignition timing, or a problem in the advance
circuit, might generate false fault codes when performing the
KOER Self-Test that would cause the test to be invalid. Use
the following procedures to check for proper ignition timing
and to verify the computer's ability to electronically advance
ignition timing.
60
OBD2 & 1
Ford OBD1 Systems
CODE RETRIEVAL PROCEDURES – ENGINE TIMING CHECK
The following "Timing Check" procedure is only
applicable to 1992 and older vehicles (excluding diesel
engines). For 1993 and newer vehicles, refer to the
vehicle's service repair manual for procedures to check
and adjust timing. DO NOT ATTEMPT TO ADJUST TIMING
ON THESE VEHICLES WITHOUT MANUFACTURER'S
SPECIFICATIONS AND PROCEDURES.
For 1992 and older vehicles, the Tool can be used in combination with a
timing light to check ignition timing and the vehicle computers ability to
advance ignition timing.
Check your vehicle thoroughly before performing any test. See
BEFORE YOU BEGIN on page 17 for details.
ALWAYS observe safety precautions whenever working on a
vehicle. Read and follow Safety Precautions on page 3 before
performing this test.
„
A timing light is required to perform this test.
„
The vehicle must pass the KOEO Test (page 57) before performing
this test.
1. Locate the vehicle's Data Link Connector (DLC). See TEST
CONNECTORS on page 55 for connector location.
Some DLCs have a plastic cover that must be removed before
connecting the Tool's cable connector.
2. Connect the Tool cable (with the Ford
Connector Cable Adaptor attached) to
the Tool, then connect the adaptor to
the
vehicle's
DLC.
Press
the
POWER/LINK
button to turn the
Tool ON, then press ENTER/FF
button to continue.
„
The Ford EEC-IV System menu
displays.
Use the
and
buttons,
as necessary, to make menu
selections.
3. From the Ford EEC-IV System menu,
highlight Timing Check, then press the
button.
ENTER/FF
4. Start and warm-up engine to normal operating temperature. Press
button to continue.
the ENTER/FF
5. Turn ignition key OFF and wait for the on screen prompt. If you wish
to exit the Timing Check procedure at this time, press the
button.
ENTER/FF
6. When instructed by the message on the Tool's display, start the
button.
engine and press the ENTER/FF
OBD2 & 1
61
Ford OBD1 Systems
ADDITIONAL TESTS FOR EEC-IV SYSTEMS – KOER TEST
„
A "One moment please preparation
for test is in progress: message
shows temporarily on the Tool's
LCD display, followed by the
message "Perform Timing Check
within two minutes."
7. When "Perform Timing Check within 2
minutes" displays, perform the Timing
Check as follows:
„
The vehicle's computer is programmed to advance ignition timing
20° (±3°) above the vehicle's "base
timing" value, and to freeze this
setting for two minutes from the time
the "Perform Timing Check within 2
minutes" message displays. This
allows the user to check the
computer's ability to advance ignition timing.
„
Within this two-minute period, follow instructions in the vehicle's
service repair manual to check the ignition timing with a timing
light and ensure that it is 20° above the specified base timing
value (±3°).
Example: If base timing specification is 10° BTDC, the acceptable
timing light reading should be in the range of 27° to 33° BTDC.
Base-timing specifications can be found on the Vehicle
Emission Control Information (VECI) decal. The decal is
located under the hood or near the radiator. If the VECI decal
is missing or damaged, refer to your vehicle's service repair
manual for specifications.
8. If timing light readings are within the acceptable range:
„
Base timing and the vehicle computer's ability to advance timing
are working properly.
„
Proceed to the KOER Self-Test below.
9. If timing light readings are not within the acceptable range:
„
Base timing may be out of adjustment, or the computer may
have problems with the timing advance circuit.
„
Refer to the vehicle's service repair manual for procedures on
adjusting and/or repairing ignition timing. Repairs to ignition
timing must be made before proceeding to the KOER Test.
Key on Engine Running (KOER) Self-Test
IMPORTANT: The KOEO Self-Test (page 57) must be
performed first, and a "pass code" (code 11 or 111) must be
obtained before performing the KOER Self-Test; otherwise,
results of the KOER Self-Test may be invalid.
62
OBD2 & 1
Ford OBD1 Systems
CODE RETRIEVAL PROCEDURES - KOER TEST
Ignition timing and timing advance must be operating properly
in order for the KOER Self-Test results to be considered valid.
Perform an Engine Timing check (page 60) before performing
the KOER Self-Test.
Check your vehicle thoroughly before performing any test. See
BEFORE YOU BEGIN on page 17 for details.
ALWAYS observe safety precautions whenever working on a
vehicle. Read and follow Safety Precautions on page 3 before
performing this test.
1. Locate the vehicle's Data Link Connector (DLC). See TEST
CONNECTORS on page 55 for connector location.
Some DLCs have a plastic cover that must be removed before
connecting the Tool cable connector.
2. Connect the Tool cable (with the Ford
Connector Cable Adaptor attached) to
the Tool, then connect the adaptor to
the
vehicle's
DLC.
Press
the
POWER/LINK
button to turn the
Tool ON, then press the ENTER/FF
button to continue.
„
The Ford EEC-IV System menu displays.
Use the
and
buttons, as
necessary, to make menu selections.
3. From the Ford EEC-IV System menu,
highlight KOER Test, then press the
button.
ENTER/FF
4. Start and warm-up engine to normal operating temperature. Press
the ENTER/FF
button to continue.
5. Turn ignition key OFF and wait for the on screen prompt. If you wish
to exit the KOER test at this time, press the ENTER/FF
button.
6. When instructed by the message on the
Tool's display, start the engine and
press the ENTER/FF
button to
continue. A "One moment please KOER
test is in progress..." message shows
temporarily on the Tool's LCD display.
7. Perform the following procedures when
prompted by the message on the Tool's
display.
„
Turn the steering wheel 1/2 turn to right, hold for four seconds
and release.
„
Press the brake pedal to the floor and then release it.
„
Cycle the Overdrive Switch (if equipped).
OBD2 & 1
63
Ford OBD1 Systems
CODE RETRIEVAL PROCEDURES – KOER TEST
„
Quickly press the accelerator pedal to the floor and then release
it.
8. After the above procedures are
performed a "One moment please
KOER test is in progress..." message
shows temporarily on the Tool's LCD
display, followed by a "Retrieving
codes" message.
9. The first code displayed by the Tool is
the Cylinder Identification (ID) Code.
The Cylinder ID code identifies the
number of cylinders of the vehicle that is
under test.
If code 98 or 998 displays instead
of a Cylinder ID code, the vehicle
is operating in "Failure Mode".
The computer goes into failure
mode when it detects a signal
from a sensor that indicates the
sensor
has failed
and is
completely out of specifications.
The computer substitutes a fixed
signal value for the failed sensor
to keep the vehicle running.
Failure mode codes 98 or 998 are
usually accompanied by one or
more Diagnostic Trouble Codes that indicate the failed sensor.
A vehicle operating in failure mode is operating at a minimal
level, and the faults that are causing these Diagnostic Trouble
Codes to set must be repaired as soon as possible.
If the Tool fails to retrieve CYL ID and DTCs, its possible that
the KOEO Test was not performed properly before proceeding
to the KOER Test. Go back and perform the KOEO Test (page
57) until a PASS code is obtained.
Most Ford EEC-IV vehicle computers up to 1991 use a twodigit code system. From 1991 to 1995 most use a three-digit
code system.
10. If no problems are found during the
KOER Self-Test, the computer sends a
"PASS code" (code 11 or 111) to the
Tool. Code 11 or 111 indicates that all
the relays and actuators and their
related circuits that were tested during
the KOER Self-Test are OK, and no
faults were found.
11. After the Tool retrieves all the KOER Self-Test DTCs, turn the
engine off, and disconnect the Tool from the vehicle's test
connectors. The DTCs retrieved are now stored in the Tool's
memory.
64
OBD2 & 1
Ford OBD1 Systems
ADDITIONAL TESTS FOR EEC-IV SYSTEMS – CYLINDER BALANCE TEST
„
See VIEWING DTCs IN THE TOOL’S MEMORY on page 13 to
view DTCs stored in the Tool's memory.
All retrieved DTCs will remain in the Tool's memory. If the
KOER Test procedure is performed again, DTC's from a prior
test will automatically clear and will be replaced by the most
current DTCs retrieved.
12. All KOER codes that are retrieved by the Tool during the KOER
Self-Test represent problems that are present now (at the time the
test is performed). The related vehicle problems that caused the
codes to be sent must be repaired using the procedures described
in the vehicle's repair manual.
The green, yellow and red LEDs are used (with the LCD
display) as visual aids to make it easier to determine engine
system conditions. See Servicing DTCs on page 86 for
information on interpreting LEDs and servicing DTCs.
13. After all repairs have been completed, repeat the KOER Self-Test.
14. If a "pass code" (code 11 or 111) is
received, it indicates that the repairs
were successful and all the related
systems are working properly.
15. If a "pass code" (code 111 or 111) is not
received, the repair was unsuccessful.
Consult the vehicle's service manual
and recheck repair procedure.
ADDITIONAL TESTS FOR EEC-IV SYSTEMS
These tests are additional, supplemental tests, and are not
needed to retrieve Diagnostic Trouble Codes. Ford has
included them to further assist the technician / do-it-yourselfer
in the troubleshooting of vehicle problems.
Cylinder Balance Test (Vehicles equipped with Sequential
Electronic Fuel Injected (SEFI) systems only)
The Cylinder Balance Test assists in finding a weak or noncontributing
cylinder. The computer shuts off fuel (cuts off power to injectors) to each
cylinder, in sequence, and monitors for RPM changes (drop). Based on
this information, the computer determines if all the cylinders are
contributing power equally (for proper engine operation), or if some
cylinders are only contributing partially or not contributing at all.
SEFI Introduction
Sequential Electronic Fuel Injection (SEFI) belongs to a family of fuel
injection systems called "Multi-port/Multipoint Fuel Injection". Multi-port
(MFI) fuel injection systems contain one fuel injector per cylinder, and
the vehicle's computer electronically controls their operation. On some
OBD2 & 1
65
Ford OBD1 Systems
ADDITIONAL TESTS FOR EEC-IV SYSTEMS - CYLINDER BALANCE TEST
multi-port fuel injection systems, the injectors all fire at the same time
and at every engine revolution. On other systems the injectors fire in
groups and/or at every other engine revolution. What distinguishes
Sequential Electronic Fuel Injection systems from other multi-port fuel
injection systems is that each injector is independently energized and
fires sequentially one after the other in the proper firing order. This gives
the vehicle's computer more control to cut the fuel to one injector at a
time (this can't be accomplished on the other systems because they fire
in groups of two ore more injectors).
Cylinder Balance Test Procedure
Check your vehicle thoroughly before performing any test. See
BEFORE YOU BEGIN on page 17 for details.
ALWAYS observe safety precautions whenever working on a
vehicle. Read and follow Safety Precautions on page 3
before performing this test.
1. Locate the vehicle's Data Link Connector (DLC). See TEST
CONNECTORS on page 55 for connector location.
Some DLCs have a plastic cover that must be removed before
connecting the Tool cable connector.
2. Connect the Tool cable (with the Ford
Connector Cable Adaptor attached) to
the Tool, then connect the adaptor to
the
vehicle's
DLC.
Press
the
POWER/LINK
button to turn the
Tool ON, then press the ENTER/FF
button to continue.
„
The Ford EEC-IV System menu displays.
3. From the Ford EEC-IV System menu,
highlight Cylinder Balance Test, then
press the ENTER/FF
button.
4. Start and warm-up engine to normal
operating temperature. Press the
button to continue.
ENTER/FF
5. Turn ignition key OFF and wait for the on screen prompt. If you wish
to exit the Cylinder Balance test at this time, press the ENTER/FF
button.
6. When instructed by the message on the
Tool's display, start the engine and
press the ENTER button. A "One
moment please preparation for test is in
progress..." message shows temporarily
on the Tool's LCD display.
66
OBD2 & 1
Ford OBD1 Systems
ADDITIONAL TESTS FOR EEC-IV SYSTEMS – CYLINDER BALANCE TEST
7. When prompted by the message on the
Tool's display, lightly press the
accelerator pedal half way and release
to activate the cylinder balance test.
For 1986 models ONLY: Fully
press accelerator once and release.
„
The computer is now in Cylinder Balance Test mode, and will
start cutting fuel to each cylinder in sequence to determine if all
the cylinders are contributing equally. It may take up to five
minutes before the test results are transmitted to the Tool.
8. If the vehicle's computer fails to enter Cylinder Balance Test mode,
do the following:
„
Lightly press the accelerator pedal again as described in step 7
above.
„
Check your vehicle's fuel injection system and make sure that it
is a Sequential Electronic Fuel Injection (SEFI) system. This test
is applicable only to SEFI or SFI systems.
9. After the Cylinder Balance Test is
completed, the test results are sent to
the Tool.
„
The computer compares the power
contribution that each cylinder
makes to engine operation.
10. If all cylinders are contributing equally,
the computer determines that power
distribution is normal and a “System
Pass” message will display.
If the computer detects a
problem with a cylinder(s) when
performing the initial Cylinder
Balance Test, it needs to repeat
the test two more times to properly determine which cylinder or
cylinders are malfunctioning. If this is the case, the Tool
will display the “Lightly press the accelerator half way and
release” message again instead of the “System Pass”.
Proceed to step 11.
11. If a cylinder is not contributing at the same level as the other
cylinders, the computer prompts you to repeat the test two more
times by displaying the “Lightly press the accelerator half way and
release” message again. Each time the message displays, perform
the procedures as instructed.
OBD2 & 1
67
Ford OBD1 Systems
ADDITIONAL TESTS FOR EEC-IV SYSTEMS - RELAY AND SOLENOID TEST
12. After the repeat Cylinder Balance tests
have completed, the computer will
identify which cylinder (or cylinders) are
not contributing equally, and will send
this information to the Tool’s LCD
display.
„
If any weak cylinders are identified,
consult the vehicle’s service repair
manual to perform further testing
and/or repairs.
Relay and Solenoid Test (Output State Check)
The "Output State Check" is a special program in the vehicle's computer
that allows the user to energize (turn ON) and de-energize (turn OFF),
on command, most of the actuators (relays and solenoids) that are
controlled by the computer.
Use this test to check computer output voltages and relay/solenoid
operation.
The fuel injectors and fuel pump are not energized during this
test. Check your vehicle thoroughly before performing any test.
See BEFORE YOU BEGIN on page 17 for details.
ALWAYS observe safety precautions whenever working on a
vehicle.
Read and follow Safety Precautions on page 3 before
performing this test.
1. Locate the vehicle's Data Link Connector (DLC). See TEST
CONNECTORS on page 55 for connector location.
Some DLCS have a plastic cover that must be removed before
connecting the Tool cable connector.
2. Connect the Tool cable (with the Ford
Connector Cable Adaptor attached) to
the Tool, then connect the adaptor to
the
vehicle's
DLC.
Press
the
POWER/LINK
button to turn the
Tool ON, then press the ENTER/FF
button to continue.
„
The Ford EEC-IV System menu displays.
Use the
necessary,
selections.
and
to
buttons, as
make
menu
3. From the Ford EEC-IV System menu,
highlight Output State Check, then
button.
press the ENTER/FF
68
OBD2 & 1
Ford OBD1 Systems
ADDITIONAL TESTS FOR EEC-IV SYSTEMS - RELAY AND SOLENOID TEST
4. Start and warm-up engine to normal operating temperature. Press
the ENTER/FF
button to continue.
5. Turn ignition key OFF and wait for the on screen prompt. If you wish
to exit the Output State Check at this time, press the ENTER/FF
button.
6. If your vehicle is equipped with one of the following engine types,
perform the added procedures described below:
„
For 4.9L engines with standard transmission: Press and hold
the clutch until the "Output State Check Active" screen displays.
„
For 7.3L diesel engines: Press and hold accelerator until the
"Output State Check Active" screen displays
„
For 2.3L turbo engines with octane switch: Put switch in
premium position.
7. Turn ignition ON. DO NOT start the engine. Press the ENTER/FF
button to continue.
8. A "One moment please test is in
progress..." message shows on the
Tool's LCD display.
As soon as the ignition is turned
"on", the vehicle's computer enters
the Self-Test mode. Clicking
sounds will be heard coming from
the engine. This is normal.
WARNING: On some vehicles equipped with an Electric
Cooling Fan, the computer activates the cooling fan to
check its operation. To avoid injury, keep hands or any
part of your body a safe distance from engine during the
test.
„
If the Tool fails to link to the
vehicle's computer, a "Vehicle is not
responding" message shows on the
Tool's LCD display. Do the following:
- Verify the ignition is ON.
- Check the cable connections at
the Code Reader and at the
vehicle's DLC.
- Turn the ignition OFF, wait 10 seconds, then turn back ON to
reset the computer.
BE SURE to perform the added procedures in step 6, if
appropriate for your vehicle, BEFORE turning the ignition ON.
- Press ENTER/FF
OBD2 & 1
button to continue.
69
Ford OBD1 Systems
ADDITIONAL TESTS FOR EEC-IV SYSTEMS - WIGGLE TEST
9. If the Tool was able to link to the vehicle
successfully an "Output State check
active..." message shows temporarily on
the Tool's LCD display. This message is
followed by a display that instructs you
how to perform the test.
10. Press the accelerator pedal once, then release. This activates the
Output State Check and energizes most of the actuators (relays and
solenoids) that are controlled by the vehicle's computer.
If your vehicle is equipped with an Integrated Vehicle Speed
Control, disconnect the vacuum supply hose from the speed
control servo before pressing the accelerator. Reconnect
vacuum hose after test.
11. To de-energize the actuators, press the accelerator pedal again and
release, the actuators are now de-energized.
12. The procedure can be repeated as many times as desired by
pressing and releasing the accelerator pedal to energize and deenergize the actuators.
13. Consult the vehicle's service repair manual for a list of actuators
(solenoids and relays) controlled by the computer that apply to the
vehicle under test, and which actuators should energize and deenergize when performing the Output State Check. All applicable
actuators should be on when energized and off when de-energized.
14. If an actuator is not responding to the Output State Check, follow the
procedures described in the vehicle's service manual to check
computer actuator output circuit voltages and/or grounds.
15. The Output State Check will stay active as long as desired. To quit
the Output State Check, turn the ignition OFF and disconnect the
Tool from the vehicle.
Wiggle Test
Since any DTC’s from Wiggle Test results are saved in
Continuous Memory, it is suggested that you clear any DTC’s
in Continuous Memory before performing Wiggle Test (see
Erasing DTCs on page 88 for procedures). This way you start
with a clean slate, and any faults detected during the
procedure will be related to that particular circuit tested.
Use this test to check for intermittent faults in some circuits.
Circuits Tested:
1984 & Newer - Air Charge Temp Sensor (ACT), Barometer Pressure
Sensor (BP), Engine Coolant Temp Sensor (ECT), Exhaust Gas
Oxygen Sensor (EGO), EGR Valve Position Sensor (EVP), Manifold
Absolute Pressure (MAP), Throttle Position Sensor (TP), Vane Air Temp
Sensor (VAT)
1985 & Newer - Vane Air Flow Sensor (VAF)
70
OBD2 & 1
Ford OBD1 Systems
ADDITIONAL TESTS FOR EEC-IV SYSTEMS - WIGGLE TEST
1986 & Newer - Pressure Feedback EGR Sensor (PFE)
1990 & Newer - Exhaust Gas Oxygen Sensor (EGO), Ignition
Diagnostic Monitor (IDM) (DIS or Dual Plug DIS only), Idle Tracking
Switch (ITS), Mass Air Flow Sensor (MAF)
ALWAYS observe safety precautions whenever working on a
vehicle. Read and follow Safety Precautions on page 3 before
performing this test.
1. Locate the vehicle's Data Link Connector (DLC). See TEST
CONNECTORS on page 55 for connector location.
Some DLCs have a plastic cover that must be removed before
connecting the Tool cable connector.
2. Connect the Tool cable (with the Ford Connector Cable Adaptor
attached) to the Tool, then connect the adaptor to the vehicle's DLC.
Press the POWER/LINK
button to turn the Tool ON, then press
the ENTER/FF
button to continue.
3. From the Ford EEC-IV System menu,
highlight Wiggle Test, then press the
button.
ENTER/FF
4. Start and warm-up engine to normal
operating temperature. Press the
button to continue.
ENTER/FF
5. Turn ignition key OFF and wait for the on screen prompt. If you wish
button.
to exit the KOEO test at this time, press the ENTER/FF
6. Select the desired Wiggle Test from the
menu displayed.
„
To perform the KOEO Wiggle Test:
- Highlight KOEO Wiggle Test.
- Turn ignition ON. DO
START THE ENGINE.
- Press the ENTER/FF
to continue.
„
NOT
button
To perform the KOER Wiggle Test:
- Highlight KOER Wiggle Test.
- Turn the ignition ON and start the engine.
- Press the ENTER/FF
button to continue.
7. A "One moment please test is in
progress" message shows temporarily
on the Tool’s LCD display.
„
If the Tool fails to link to the vehicle's
computer, a "Vehicle is not
responding" message shows on the
Tool's LCD display. Do the following:
OBD2 & 1
71
Ford OBD1 Systems
ADDITIONAL TESTS FOR EEC-IV SYSTEMS - WIGGLE TEST
For KOEO Wiggle Test:
- Verify the ignition is ON.
- Turn the ignition OFF, wait 10 seconds, then turn back ON to
reset the computer. Press the ENTER/FF
button to
continue.
For KOER Wiggle Test:
- Turn the engine OFF, wait 10 seconds, then turn back ON.
Press the ENTER/FF
button to continue.
BE SURE to perform the added procedures in step 6, if
appropriate for your vehicle, BEFORE turning the ignition ON.
- Press ENTER/FF
button to continue.
8. If the Tool was able to link to the vehicle successfully, a "Wiggle test
is active..." message shows temporarily on the Tool’s LCD display.
This is followed by a message instructing you how to perform the
test.
„
Press the ENTER/FF
Test at this time.
button if you wish to exit the Wiggle
9. Wiggle, tap and move the suspected sensor or wiring.
„
If no faults are detected when
performing the Wiggle Test, a
"System Pass" message displays.
„
If a fault is detected when
performing the Wiggle Test, a
"Circuit Fault detected" message
displays.
If the Wiggle Test detects
any problems, the related
DTC will be stored by the
computer in "Continuous
Memory". To view any
Wiggle Test DTC’s you
must perform the KOEO
Test. See page 57 for
KOEO Test procedures.
10. Follow the procedures in the vehicle's service repair manual to
perform troubleshooting and repairs for Wiggle Test results.
11. The Wiggle Test will stay active as long as desired. To quit the
Wiggle Test, turn the ignition OFF and disconnect the Tool from the
vehicle.
72
OBD2 & 1
GM OBD1 Systems
YOUR VEHICLE’S COMPUTER SYSTEM - VEHICLES COVERED
YOUR VEHICLE'S COMPUTER SYSTEM
Today's vehicles are equipped with computer self-testing abilities that
can locate problems in your vehicle and store them as Diagnostic
Trouble Codes (DTC's) in the vehicle's onboard computer. The Tool
allows you access to the computer's memory and retrieves the DTC's.
VEHICLES COVERED
This Tool may be used to retrieve engine service codes from most
General Motors (GM) domestic cars and trucks (EXCEPT Geo, Nova,
Saturn and Sprint).
Model
Year
1982-93
Make
Buick
Cadillac
Chevrolet
Oldsmobile
Pontiac
1994
Trucks and
Vans
Buick
Chevrolet
Pontiac
1995
Trucks and
Vans
Chevrolet
Trucks and
Vans
OBD2 & 1
Model
Century, Electra, Electra Wagon, Estate Wagon,
Le Sabre, Le Sabre Wagon, Park Avenue, Reatta,
Regal, Grand National, Riviera, Roadmaster,
Skyhawk, Skylark, Somerset
De Ville, El Dorado, Fleetwood, Seville
Beretta, Camaro, Caprice, Cavalier, Celebrity,
Chevette, Citation, Corsica, Corvette, El Camino,
Impala, Lumina, Monte Carlo
Achieva, Calais, Custom Cruiser, Cutlass Calais,
Ciera, Cutlass Cruiser, Cruiser Wagon, Cutlass
Supreme, Supreme Classic, Delta 88, Eightyeight, Firenze, Ninety-eight, Omega, Toronado,
Touring Sedan, Trofeo
6000, 6000 STE, Bonneville, Fiero, Firebird,
Grand Am, Grand Prix, J 2000, Lemans,
J Parisienne, Phoenix, Safari, Safari Wagon,
Sunbird, T 1000
All one ton capacity or less with gas engines
Roadmaster 5.7 liter
Camaro 3.4 liter/5.7 liter, Caprice 5.7 liter,
Caprice 5.7 liter, Cavalier 3.1 liter,
Lumina 3.1 liter
Firebird 3.4 liter/5.7 liter, Sunbird 2.0 liter/
3.1 liter
All one ton capacity or less with gas engines
Caprice 4.3 liter
All one ton capacity or less with gas engines
(EXCEPT S/T Series vehicles)
73
GM OBD1 Systems
ABOUT THE TOOL - DLC – MIL - DTCs
In addition to the list on the previous page, this Tool IS
ALSO COMPATIBLE with OBD1 GM models that are
equipped with "Climate Control Computers".
For 1994 and 1995 vehicles, only the models listed above are
compatible with the Tool.
ABOUT THE TOOL
The Tool is a device that connects to your vehicle's Data Link Connector
to retrieve any Diagnostic Trouble Codes that are stored in the vehicle's
on-board computer.
DATA LINK CONNECTOR (DLC)
Your vehicle test connector is known as the
Assembly Line Data Link (ALDL) connector,
Assembly Line Communication Link (ALCL)
Connector or the Data Link Connector
(DLC). The GM DLC connector contains 12 pins and is usually black in
color. On most GM vehicles, the connector is found under the left side of
the dashboard.
MALFUNCTION INDICATOR LIGHT (MIL)
Your vehicle's instrument panel has a Malfunction Indicator Light (MIL)
also called the "Check Engine" or "Service Engine soon" light. The MIL
is an indicator to warn the vehicle operator of a problem in the computer
control system.
CHECK ENGINE
SERVICE
ENGINE
SOON
If your instrument panel indicator lights do not come on when
you turn on the ignition, please refer to your vehicle's service
manual. You may have problems in the vehicle's circuitry.
DIAGNOSTIC TROUBLE CODES (DTC's)
The service codes are also called "fault codes", "Diagnostic Trouble
Codes" (DTC's) or "trouble codes". These codes can be used to identify
systems or components that are malfunctioning. The computer records
codes for two types of problems:
„
"Hard" Diagnostic Trouble Codes
"Hard" DTCs represent problems that are occurring now and cause
the instrument panel Malfunction Indicator Lamp (MIL) or Check
Engine light to illuminate and remain on until the failure is repaired.
A DTC is stored in the vehicle's computer memory for each fault
detected. A Tool or Scanner can be used to retrieve DTCs that are
stored in the vehicle's computer memory.
74
OBD2 & 1
GM OBD1 Systems
CODE RETRIEVAL PROCEDURE
„
Intermittent/History DTCs
Intermittent/History DTCs are stored in the computer's memory for
problems that occur intermittently, or for problems that happened in
the past but are not currently present. Intermittent DTCs may cause
the Malfunction Indicator light to flicker or stay on until the
intermittent malfunction goes away. However, the corresponding
fault code will be stored in memory as a history DTC. If the
malfunction that caused the history DTC to set does not recur within
a predetermined length of time (usually within 40-80 ignition key
start cycles), the computer will automatically erase the related fault
code from its memory.
CODE RETRIEVAL PROCEDURE
Retrieving and using Diagnostic Trouble Codes (DTCs) for
troubleshooting vehicle operation is only one part of an
overall diagnostic strategy.
Never replace a part based only on the DTC definition.
Each DTC has a set of testing procedures, instructions
and flow charts that must be followed to confirm the
location of the problem. This information is found in the
vehicle's service manual. Always refer to the vehicle's
service manual for detailed testing instructions.
Check your vehicle thoroughly before performing
any test. See BEFORE YOU BEGIN on page 17
for details.
ALWAYS observe safety precautions whenever working on a
vehicle. See Safety Precautions on page 3 for more
information.
1. Locate the vehicle's Data Link Connector (DLC). See DATA LINK
CONNECTOR (DLC) on page 74 for connector location.
Some DLCs have a plastic cover that must be removed before
connecting the Tool's cable connector.
2. Connect the Tool cable (with the GM
Connector Cable Adaptor attached) to
the Tool, then connect the adaptor to
the
vehicle’s
DLC.
Press
the
POWER/LINK
button to turn the
Tool ON, then press the ENTER/FF
button to continue.
3. Select the model year of the vehicle from which you wish to retrieve
codes:
OBD2 & 1
75
GM OBD1 Systems
CODE RETRIEVAL PROCEDURE
If a previous vehicle selection is currently saved in the Tool's
memory, the "Current Selection/Select New Vehicle" menu
displays. If no previous vehicle selection is stored in the Tool's
memory, "Select New Vehicle" displays.
Use the
selections.
„
and
buttons, as necessary, to make menu
To retrieve DTCs from the vehicle selection currently in the
Tool’s memory:
- From the “Current Selection/
Select New Vehicle” screen, highlight Current Selection, turn
ignition key ON (DO NOT start
engine) and press the ENTER/FF
button.
- Proceed to step 5 to continue.
„
To retrieve DTCs from a new
vehicle:
- From the “Current Selection/
Select New Vehicle” screen,
highlight Select New Vehicle and
press the ENTER/FF
button;
the “Select Vehicle Year” menu
displays.
- Highlight the desired year, then
press the ENTER/FF
button;
the “Enter the 8th digit of VIN”
menu displays.
- Highlight the 8th digit of the
vehicle’s VIN, then press the
ENTER/FF
button.
If the “Enter 4th VIN Digit” screen displays (not applicable to all
vehicles), highlight the 4th digit of the vehicle’s VIN, then press
the ENTER/FF
button.
- The “Current Selection/Select New Vehicle” screen displays
for your confirmation.
- If the information shown in the “Current Selection” field is
correct, highlight Current Selection, turn ignition key ON (DO
NOT start engine) and press the ENTER/FF
button.
Proceed to step 4 to continue.
If the year shown is not correct, highlight Select New Vehicle
and press the ENTER/FF
button to return to the “Select
Vehicle Year” menu to make your corrections.
4. When the Tool is in the process of retrieving codes, a "One moment
please..." message shows on the Tool’s LCD display.
76
OBD2 & 1
GM OBD1 Systems
CODE RETRIEVAL PROCEDURE
„
If the Tool fails to link to the
vehicle's computer, a "Vehicle is not
responding" message shows on the
Tool’s LCD display. Do the following:
„
Verify the ignition is ON.
„
Check the cable connections at the
Tool and at the vehicle’s DLC.
„
Turn the ignition OFF, wait 10-12 seconds, then turn back ON to
reset the computer.
„
Press the ENTER/FF
necessary.
button and repeat steps 4 and 5 as
5. If the Tool was able to link to the vehicle
successfully, a "Code retrieval was
successful..." message shows temporarily on the Tool’s LCD display,
followed by any retrieved DTCs.
„
The Tool will display a code only of codes
are present in the vehicle's computer
memory. If no codes are present, a "No
DTC's are presently stored in the vehicle's
computer" is displayed.
6. If more than one code was retrieved, press the DTC SCROLL
button, as necessary, to display additional codes one at a time.
In the case of long code definitions, a small arrow is shown in the
upper/lower right-hand corner of the code display area to indicate
and
the presence of additional information. Use the
buttons, as necessary, to view the additional information.
Code 12 will always be present and it has one of the following meanings:
„
If code 12 is the only DTC retrieved and your vehicle "STARTS OK"
then code 12 indicates system "PASS" and all computer control
systems are functioning properly.
„
If code 12 is present and your vehicle "DOES NOT START", then it
may indicate a problem with the ignition control system.
7. Disconnect the Tool from the vehicle and turn the ignition key OFF.
8. To prolong battery life, the Tool automatically shuts "Off" after
approximately three minutes with no button activity. The DTCs
retrieved will remain in the Tool's memory, and may be viewed at
any time. If the Tool’s batteries are removed, or if the Tool is relinked to a vehicle to retrieve codes, any prior codes in its memory
are automatically cleared.
„
See VIEWING DTCs IN THE TOOL’S MEMORY on page 13 to
view DTCs stored in the Tool’s memory.
9. Follow the testing and repair procedures outlined in the vehicle's
service repair manual to correct "hard" DTCs. Codes should be
addressed and eliminated in the order they were received, erasing
OBD2 & 1
77
GM OBD1 Systems
CODE RETRIEVAL PROCEDURE
(see Erasing DTCs on page 88) and retesting after each repair is
made to be sure the fault was eliminated. Code 12 will appear alone
when no other fault codes are present.
„
It may be necessary to test drive the vehicle to reset "hard" fault
codes 13, 15, 24, 44, 45, and 55 after they have been erased.
Whenever codes 51, 52, 54, or 55 are displayed with other
codes, troubleshoot and eliminate the "50 Series" codes first,
then proceed with the lower numbered codes.
The green, yellow and red LEDs are used (with the LCD
display) as visual aids to make it easier to determine engine
system conditions. See Servicing DTCs on page 86 for
information on interpreting LEDs and servicing DTCs.
78
OBD2 & 1
Toyota/Lexus OBD1 Systems
ON-BOARD VEHICLE DIAGNOSTICS / VEHICLES COVERED
ON-BOARD VEHICLE DIAGNOSTICS (OBD1)
„
Beginning in 1988, California's Air Resources Board (CARB), and
later, the Federal Government's Environmental Protection Agency
(EPA), required vehicle manufacturers to include a self diagnostic
program capable of identifying an emissions-related fault via the
vehicles On-Board Computers (some manufacturers used OBD
before it was required). The first generation of Onboard Diagnostics
came to be known as OBD I.
„
OBD I is a set of self-testing or self-diagnosing instructions that are
programmed into the vehicle's on-board computer.
„
The program is specifically designed to detect failures in the sensors,
actuators, switches and wiring of the various vehicle emissionsrelated systems (fuel injection system, ignition system, EGR system,
catalytic converter, etc.). If the computer detects a failure in any one
of these components or systems, it alerts the driver by illuminating
the "Check Engine" light on the dash.
„
The computer also assigns a numeric code (OBD I systems utilized
a 2 or 3 digit code) for each specific problem that it detects, and
stores these codes in it's memory for later retrieval. The codes can
be retrieved from the computer's memory with the use of a device
called a "Tool" or a "Scan Tool".
With the exception of some 1994 and 1995 vehicles, most
vehicles from about 1982 to 1995 are equipped with OBD I
systems.
VEHICLES COVERED
The following tables identify the Toyota and Lexus OBD1 vehicles that
are covered by the Enhanced OBD2 & 1 Tool.
DLC 1 Cars
Year
1995
1992
1992
1993
1993
1994
1993
1993
1994
1994
Model
Camry Coupe
Camry Sedan
Camry Sedan
Camry Sedan
Camry Sedan
Camry Sedan
Celica
Celica
Celica
Celica
OBD2 & 1
Eng.
Size
2.2L
2.2L
3.0L
3.0L
2.2L
2.2L
2.0L
2.2L
1.8L
2.2L
Eng.
Code
5S-FE
5S-FE
2VZ-FE
3VZ-FE
5S-FE
5S-FE
3S-GTE
5S-FE
7A-FE
5S-FE
DOHC/
SOHC
DOHC
DOHC
DOHC
DOHC
DOHC
DOHC
DOHC
DOHC
DOHC
DOHC
Other
Turbo
DLC
Type
1
1
1
1
1
1
1
1
1
1
79
Toyota/Lexus OBD1 Systems
VEHICLES COVERED
Year
1992
Model
Celica
Convertible
1992
1992
1993
1995
1992
1992
1993
1993
1994
1994
1993
1993
1993
1993
1993
1994
1994
1994
1995
1995
1991
1991
1992
1992
1993
1994
Celica Coupe
Celica Coupe
Celica Coupe
Celica Coupe
Celica Liftback
Celica Liftback
Corolla Sedan
Corolla Sedan
Corolla Sedan
Corolla Sedan
ES-300
GS-300
LS-400
MR2
MR2
MR2
MR2
Paseo
Paseo
SC-300
Supra
Supra
Supra
Supra
Tercel Sedan
Tercel Sedan
Eng.
Size
2.2L
Eng.
Code
5S-FE
DOHC/
SOHC
DOHC
1.6L
2.2L
1.6L
1.8L
2.0L
2.2L
1.6L
1.8L
1.6L
1.8L
3.0L
3.0L
4.0L
2.0L
2.2L
2.0L
2.2L
1.5L
1.5L
3.0L
3.0L
3.0L
3.0L
3.0L
1.5L
1.5L
4A-FE
5S-FE
4A-FE
7A-FE
3S-GTE
5S-FE
4A-FE
7A-FE
4A-FE
7A-FE
3VZ-FE
2JZ-GE
1UZ-FE
3S-GTE
5S-FE
3S-GTE
5S-FE
5E-FE
5E-FE
2JZ-GE
7M-GTE
7M-GE
7M-GTE
7M-GE
3E-E
3E
DOHC
DOHC
DOHC
DOHC
DOHC
DOHC
DOHC
DOHC
DOHC
DOHC
DOHC
DOHC
DOHC
DOHC
DOHC
DOHC
DOHC
DOHC
DOHC
DOHC
DOHC
DOHC
DOHC
DOHC
SOHC
SOHC
Eng.
Size
3.0L
3.0L
3.0L
3.0L
3.0L
Eng.
Code
7M-GE
7M-GE
7M-GE
7M-GE
3VZ-FE
DOHC/
SOHC
DOHC
DOHC
DOHC
DOHC
DOHC
Other
A/T
A/T
Turbo
Turbo
Turbo
Turbo
Turbo
DLC
Type
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
DLC 2 Cars
Year
1989
1990
1991
1992
1993
80
Model
Cressida
Cressida
Cressida
Cressida
Camry
Other
DLC
Type
2
2
2
2
2
OBD2 & 1
Toyota/Lexus OBD1 Systems
VEHICLES COVERED
Year
1993
1993
1994
1994
1994
1995
1995
1992
1990
1991
1992
1992
1991
1992
1993
1994
1994
1993
1994
1993
Model
Supra
Supra
Camry
Supra
Supra
Supra
Supra
SC-300
ES-250
ES-250
ES-300
SC-400
LS-400
LS-400
SC-400
SC-400
SC-300
SC-400
GS-300
SC-300
Eng.
Size
3.0L
3.0L
3.0L
3.0L
3.0L
3.0L
3.0L
3.0L
2.5L
2.5L
3.0L
4.0L
4.0L
4.0L
4.0L
4.0L
3.0L
4.0L
3.0L
3.0L
Eng.
Code
2JZ-GTE
2JZ-GE
3VZ-FE
2JZ-GTE
2JZ-GE
2JZ-GTE
2JZ-GE
2JZ-GE
2VZ-FE
2VZ-FE
3VZ-FE
1UZ-FE
1UZ-FE
1UZ-FE
1UZ-FE
1UZ-FE
2JZ-GE
1UZ-FE
2JZ-GE
2JZ-GE
DOHC/
SOHC
DOHC
DOHC
DOHC
DOHC
DOHC
DOHC
DOHC
DOHC
DOHC
DOHC
DOHC
DOHC
DOHC
DOHC
DOHC
DOHC
DOHC
DOHC
DOHC
DOHC
Eng.
Size
2.4L
2.4L
2.4L
3.0L
2.4L
3.0L
2.4L
3.0L
2.4L
Eng.
Code
2TZ-FE
2TZ-FE
2TZ-FE
3VZ-FE
22R-E
3VZ-FE
22R-E
3VZ-FE
2TZ-FE
DOHC/
SOHC
DOHC
DOHC
DOHC
SOHC
SOHC
SOHC
SOHC
SOHC
DOHC
Other
Turbo
Turbo
Turbo
DLC
Type
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
DLC 1 Light Trucks
Year
1992
1993
1994
1994
1995
1995
1995
1995
1995
Model
Previa
Previa
Previa
T100
4 Runner
4 Runner
Pickup
Pickup
Previa
OBD2 & 1
Other
DLC
Type
1
1
1
1
1
1
1
1
1
81
Toyota/Lexus OBD1 Systems
DATA LINK CONNECTOR (DLC) / MIL
DATA LINK CONNECTOR (DLC)
Toyota vehicles are equipped with special Test Connectors that make it
possible to connect specialized testing equipment that communicates
with the vehicle's onboard computer. This Tool is designed for use with
two types of Toyota DLC connectors; DLC Number 1 and DLC Number
2, as described below.
The Tool's Toyota Connector Cable Adaptor is designed to
match the vehicle's DLC. Make sure the adaptor mates
properly before applying any force when making the
connection. Applying force to the connector when not mated
properly may cause damage to the connectors.
1. Type 1 connector is also known as Data Link Connector Number 1.
The type 1 DLC connector is a rectangular connector and is usually
black or gray in color. The connector is located under the hood
(engine compartment) in the following general locations:
„
Front corner (right or left)
„
Front corner (right or left)
„
Fender well (right or left)
„
Fire wall (right or left)
It has a cover labeled "DIAGNOSTIC",
"DIAGNOSIS", or "CHECK CONN", Use the
square head of the Toyota Connector Cable
Adaptor on vehicles with this type of connector.
2. Type 2 connector is also known as Data
Link Connector (DLC) Number 2. The
type 2 DLC connector is a round
connector and is usually black or gray in
color.
„
The connector is located "under the
dash" on the left hand side.
It may have a protective cap that needs to be removed before
connecting the Tool's DLC. Use the round head of the Toyota
Connector Cable Adaptor on vehicles with this type of connector.
INSTRUMENT PANEL MALFUNCTION INDICATOR LIGHTS
(MIL)
Your vehicle's instrument panel has a Malfunction Indicator Light (MIL)
also called the "Check Engine" or "Service Engine soon" light. The MIL
is an indicator to warn the vehicle operator of a problem in the computer
control system.
CHECK ENGINE
82
SERVICE
ENGINE
SOON
OBD2 & 1
Toyota/Lexus OBD1 Systems
DIAGNOSTIC TROUBLE CODES / CODE RETRIEVAL PROCEDURE
If your instrument panel indicator lights do not come on when
you turn on the ignition, please refer to your vehicle's service
manual. You may have problems in the car's circuitry. It is
recommended that you fix these problems before retrieving
DTCs from your vehicle’s computer.
DIAGNOSTIC TROUBLE CODES
Diagnostic Trouble Codes, or Fault Codes, can be used to identify
engine systems or components that are malfunctioning. The computer
records codes for the following two types of engine problems:
„
"Hard" Diagnostic Trouble Codes
"Hard" DTCs represent problems that are occurring now and cause
the instrument panel Malfunction Indicator Lamp (MIL) or Check
Engine light to illuminate and remain on until the failure is repaired.
A DTC is stored in the vehicle's computer memory for each fault
detected. A Tool or Scanner can be used to retrieve DTCs that are
stored in the vehicle's computer memory.
„
Intermittent/History DTCs
Intermittent/History DTCs are stored in the computer's memory for
problems that occur intermittently, or for problems that happened in
the past but are not currently present. Intermittent DTCs may cause
the Malfunction Indicator light to flicker or stay on until the
intermittent malfunction goes away. However, the corresponding
fault code will be stored in memory as a history DTC. If the
malfunction that caused the history DTC to set does not recur within
a predetermined length of time (usually within 40-80 ignition key
start cycles), the computer will automatically erase the related fault
code from its memory.
CODE RETRIEVAL PROCEDURE
Retrieving and using Diagnostic Trouble Codes (DTCs) for
troubleshooting vehicle operation is only one part of an
overall diagnostic strategy.
Never replace a part based only on the DTC definition.
Each DTC has a set of testing procedures, instructions and
flow charts that must be followed to confirm the location of
the problem. This information is found in the vehicle's service
manual. Always refer to the vehicle's service manual for
detailed testing instructions.
OBD2 & 1
83
Toyota/Lexus OBD1 Systems
CODE RETRIEVAL PROCEDURE
Check your vehicle thoroughly before performing any test. See
BEFORE YOU BEGIN on page 17 for details.
ALWAYS observe safety precautions whenever working on a
vehicle. See Safety Precautions on page 3 for more
information.
1. Locate the vehicle's Data Link Connector (DLC). See DATA LINK
CONNECTOR (DLC) on page 82 for connection location.
Some DLCs have a plastic cover that must be removed before
connecting the Tool's cable connector.
2. Connect the Tool cable (with the Toyota Connector Cable Adaptor
attached) to the Tool, then connect the adaptor to the vehicle’s DLC.
Press the POWER/LINK
button to turn the Tool ON.
3. Do the following before proceeding to step 4:
„
Turn ignition ON and start engine. Warm engine to operating
temperature. (Shut engine off after warm up).
„
Make sure throttle is closed.
„
Set gear lever in "park" (for automatic transmissions) or “neutral”
for manual transmissions.
„
Turn off all accessories.
4. Turn ignition ON. DO NOT start the
button
engine. Press the ENTER/FF
to continue.
„
The Tool will begin the code retrieval process.
5. When the Tool is in the process of retrieving codes, a "One moment
please..." message shows on the Tool’s LCD display.
„
If the Tool fails to link to the
vehicle’s computer a “Vehicle is not
responding” message shows on the
Tool’s LCD display. Do the following:
- Verify the ignition is ON.
- Check the cable connections at
the Tool and at the vehicle’s DLC.
- Turn the ignition OFF, wait 10-12 seconds, then turn back ON
to reset the computer.
- Press the ENTER/FF
necessary.
button and repeat steps 3 and 4 as
6. If the Tool was able to link to the vehicle
successfully a "Code retrieval was
successful..." message shows temporarily on the Tool’s LCD display followed
by any retrieved DTCs.
84
OBD2 & 1
Toyota/Lexus OBD1 Systems
CODE RETRIEVAL PROCEDURE
„
The Tool will display a code only if
codes are present in the vehicle's
computer memory. If no codes are
present, a "No DTC' are presently
stored in the vehicle's computer"
message is displayed.
7. If more than one code was retrieved
press the DTC SCROLL
, as
necessary, to display additional codes
one at a time.
In the case of long code definitions, a small arrow is shown in
the upper/lower right-hand corner of the code display area to
indicate the presence of additional information. Use the
buttons, as necessary, to view the additional
and
information.
8. Disconnect the Tool from the vehicle and turn the ignition key OFF.
9. To prolong battery life, the Tool automatically shuts "Off" after
approximately three minutes with no button activity. The DTCs
retrieved will remain in the Tool's memory, and may be viewed at
any time. If the Tool’s batteries are removed, or if the Tool is relinked to a vehicle to retrieve codes, any prior codes in its memory
are automatically cleared.
„
See VIEWING DTCs IN THE TOOL’S MEMORY on page 13 to
view DTCs stored in the Tool’s memory.
10. Follow the testing and repair procedures outlined in the vehicle's
service repair manual to correct "hard" DTCs. Codes should be
addressed and eliminated in the order they were received, erasing
(see Erasing DTCs on page 88) and retesting after each repair is
made to be sure the fault was eliminated.
The green, yellow and red LEDs are used (with the LCD
display) as visual aids to make it easier to determine engine
system conditions. See Servicing DTCs on page 86 for
information on interpreting LEDs and servicing DTCs.
OBD2 & 1
85
Servicing DTCs
OBD1
SERVICING DTCs - OBD I
Retrieving and using Diagnostic Trouble Codes (DTCs) for
troubleshooting vehicle operation is only one part of an
overall diagnostic strategy.
Never replace a part based only on the DTC definition.
Each DTC has a set of testing procedures, instructions and
flow charts that must be followed to confirm the location
of the problem. This information is found in the vehicle's
service manual. Always refer to the vehicle's service manual
for detailed testing instructions.
1. Determine engine system(s) condition by viewing the
Tool's LCD display for any retrieved Diagnostic Trouble
Codes, code definitions and interpreting the green, yellow
and red LEDs.
The green, yellow and red LEDs are used (with the LCD
display) as visual aids to make it easier to determine engine
system conditions.
2. Green LED - Indicates that all engine
systems are "OK" and operating
normally. No trouble codes are present.
If you are not experiencing any vehicle
problems NO FURTHER TESTING IS
REQUIRED.
„
If you are still experiencing vehicle
problems even through the green
LED illuminates, the problem is not
in the computer control systems.
See the NO CODES troubleshooting section of your vehicle's
repair manual for further troubleshooting instructions.
3. Yellow LED - Indicates an Intermittent or History DTC is present.
Intermittent/History DTCs are stored in the computer's memory for
problems that occur intermittently, or for problems that happened in the
past but are not currently present. Intermittent DTCs may cause the
Malfunction Indicator light to flicker or stay on until the intermittent
malfunction goes away. However, the corresponding fault code will be
stored in memory as a history DTC. If the malfunction that caused the
history DTC to set does not recur within a predetermined length of time
(usually within 40-80 ignition key start cycles), the computer will
automatically erase the related fault code from its memory.
„
86
HISTORY DTC - On some vehicles, the computer will keep a record
or history of DTCs that relate to problems that happened in the past
but are no longer present. These DTCs will not command the MIL or
Check Engine light "On", but the yellow LED will be illuminated.
OBD2 & 1
Servicing DTCs
OBD1
4. Red LED - Indicates there is a
problem with one or more of the
vehicle's systems. The red LED is
also used to indicate that DTC(s)
are present (displayed on the
Tool's screen). In this case, the
MIL or Check Engine light on the
vehicle's instrument panel will be
illuminated.
„
If DTC's were retrieved and you are going to perform the repairs
yourself, proceed by consulting the vehicle's service repair
manual for testing instructions, testing procedures, and flow
charts related to retrieved code(s).
„
If you plan to take the vehicle to a professional to have it
serviced, complete the PRELIMINARY VEHICLE DIAGNOSTIC
WORKSHEET on page 14 and take it, together with the
retrieved codes and LED information, to aid in the
Troubleshooting procedure.
Retrieved information can be uploaded to a Personal
Computer (PC) with the use of an optional PC-Link Kit. For
more information, see instructions included with PC-Link
software.
OBD2 & 1
87
Erasing DTCs
OBD1 SYSTEMS
ERASING DTCs (OBD I SYSTEMS)
When the Tool's ERASE function is used to erase DTCs
from the vehicle's on-board computer, manufacturer
specific data (where applicable) is also erased.
If you plan to take the vehicle to a service center for repair, DO NOT
erase the codes from the vehicle's computer. If the codes are erased,
valuable information that might help the technician troubleshoot the
problem will also be erased.
Erase DTC’s from the computer’s memory as follows:
1. Connect the Tool to the vehicle’s DLC. Press the ENTER/FF
button to continue.
2. Turn the ignition ON. DO NOT start the engine.
For FORD systems only, first perform step 3 below, then turn
ignition “ON” and press the ENTER/FF
button to continue.
3. Press and release the ERASE
shows on the LCD display.
button. A confirmation message
- If you are sure you want to proceed,
press the ERASE
button again to
erase DTCs from the vehicle's
computer.
- If you do not want to continue with
the erase process, press the
ENTER/FF
button to exit the
erase function.
4. If you chose to erase DTCs, a status
screen displays while the erase function
is in progress.
„
If the erase was successful, a
confirmation message shows on the
Tool’s LCD display. press the
button to exit.
ENTER/FF
Due to the differences in computer systems, the Tool can be
used to erase codes for some vehicles, while others require
codes to be erased manually. If the “To erase DTC’s consult
the vehicle’s service repair manual...” screen displays, you
must consult the vehicle’s service repair manual for
procedures to erase DTCs.
88
OBD2 & 1
Erasing DTCs
OBD1 SYSTEMS
„
If the erase was not successful, an
advisory message shows on the
LCD display. Verify that the Tool is
properly connected to the vehicle's
DLC and that the ignition is ON. If
the erase process still does not
complete, turn the ignition OFF, wait
10 seconds, then turn back ON and
repeat steps 2 and 3.
FORD systems will not display an erase was not successful
message. If the “One moment please erase in progress”
message on the display does NOT change after 3 minutes, it
indicates that the erase function has failed. Check the DLC
connections and make sure the ignition key is “ON”. Perform
the ERASE function again.
Erasing DTCs does not fix the problem(s) that caused the
code(s) to be set. If proper repairs to correct the problem that
caused the code(s) to be set are not made, the code(s) will
appear again and the check engine light will illuminate as soon
as the problem that cause the DTC to set manifests itself.
OBD2 & 1
89
Glossary
GLOSSARY OF TERMS AND ABBREVIATIONS
GLOSSARY OF TERMS AND ABBREVIATIONS
CARB – California Air Resources Board
CCM – Central Control Module
Computer Control System – An electronic control system, consisting
of an on-board computer and related sensors, switches and actuators,
used to ensure peak performance and fuel efficiency while reducing
pollutants in the vehicle’s emissions.
DIY – Do-It-Yourself
DLC – Data Link Connector
Drive Cycle – An extended set of driving procedures that takes into
consideration the various types of driving conditions encountered in real
life.
Driving Condition – A specific environmental or operation condition
under which a vehicle is operated; such as starting the vehicle when
cold, driving at steady speed (cruising), accelerating, etc.
DTC(s) – Diagnostic Trouble Code(s)
EGR – Exhaust Gas Recirculation
EPA – Environmental Protection Agency
EVAP – Evaporative Emissions System
Fault Code – See DTCs
Freeze Frame – A digital representation of engine and/or emissions
system conditions present when a fault code was recorded.
FTP – Fuel Tank Pressure
Generic Code – A DTC that applies to all OBD2 compliant vehicles.
I/M Readiness – An indication of whether or not a vehicle’s emissionsrelated system are operating properly and are ready for Inspection and
Maintenance testing.
I/M Test / Emissions Test / Smog Check – A functional test of a
vehicle to determine if tailpipe emissions are within Federal/State/Local
requirements.
LCD – Liquid Crystal Display
LED – Light Emitting Diode
LTFT – Long Term Fuel Trim, is a program in the vehicle’s computer
designed to add or subtract fuel from the vehicle to compensate for
operating conditions that vary from the ideal A/F ratio (long term).
Manufacturer Specific Code – A DTC that applies only to OBD2
compliant vehicles made by a specific manufacturer.
MIL – Malfunction Indicator Lamp (also referred to as “Check Engine”
light
OBD1 – On-Board Diagnostics Version 1 (also referred to as “OBD I”)
90
OBD2 & 1
Glossary
GLOSSARY OF TERMS AND ABBREVIATIONS
OBD2 – On-Board Diagnostics Version 2 (also referred to as “OBD II”)
On-Board Computer – The central processing unit in the vehicle’s
computer control system.
PCM – Powertrain Control Module
Pending Code – A code recorded on the “first trip” for a “two-trip” code.
If the fault that caused the code to be set is not detected on the second
trip, the code is automatically erased.
PID – Parameter Identification
STFT – Short Term Fuel Trim, is a program in the vehicle’s computer
designed to add or subtract fuel from the vehicle to compensate for
operating conditions that vary from the ideal A/F ratio. The vehicle uses
this program to make minor fuel adjustments (fine tune) on a short-term
basis.
Trip Drive Cycle – Vehicle operation that provides the necessary
driving condition to enable a vehicle Monitor to run and complete its
diagnostic testing.
VECI – Vehicle Emission Control Information Decal
OBD2 & 1
91
Notes
92
OBD2 & 1
Warranty and Servicing
LIMITED ONE YEAR WARRANTY
The Manufacturer warrants to the original purchaser that this unit is free
of defects in materials and workmanship under normal use and
maintenance for a period of one (1) year from the date of original
purchase.
If the unit fails within the one (1) year period, it will be repaired or
replaced, at the Manufacturer’s option, at no charge, when returned
prepaid to the Service Center with Proof of Purchase. The sales receipt
may be used for this purpose. Installation labor is not covered under this
warranty. All replacement parts, whether new or remanufactured,
assume as their warranty period only the remaining time of this warranty.
This warranty does not apply to damage caused by improper use,
accident, abuse, improper voltage, service, fire, flood, lightning, or other
acts of God, or if the product was altered or repaired by anyone other
than the Manufacturer’s Service Center.
The Manufacturer, under no circumstances shall be liable for any
consequential damages for breach of any written warranty of this unit.
This warranty gives you specific legal rights, and you may also have
rights, which vary from state to state. This manual is copyrighted with all
rights reserved. No portion of this document may be copied or
reproduced by any means without the express written permission of the
Manufacturer. THIS WARRANTY IS NOT TRANSFERABLE. For
service, send via U.P.S. (if possible) prepaid to Manufacturer. Allow 3-4
weeks for service/repair.
SERVICE PROCEDURES
If you have any questions, require technical support or information on
UPDATES and OPTIONAL ACCESSORIES, please contact your local
store, distributor or the Service Center.
USA & Canada:
(800) 544-4124 (6:00 AM-6:00 PM, 7 days a week PST)
All others: (714) 241-6802 (6:00 AM-6:00 PM, 7 days a week PST)
FAX: (714) 432-3979 (24 hr.)
Web: www.innova.com
OBD2 & 1
93
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