Operating Instructions

Operating Instructions
Operating Instructions
for the WABCO
Diagnostic Controller 446 300 320 0
with Program Card
ECAS 4x2-A 446 300 521 0
or
ECAS 6x2-A 446 300 527 0
or
ECAS BUS-A 446 300 529 0
March 1996 Edition
© Copyright WABCO 1996
WABCO
Fahrzeugbremsen
A Division of
WABCO Standard GmbH
1
TABLE OF CONTENTS
Page
1.
Brief description of system . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
2.
Diagnostic components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
3.
3.1
3.2
Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Vehicle with central diagnostic socket . . . . . . . . . . . . . . . . . . 5
Vehicle without central diagnostic socket . . . . . . . . . . . . . . . . 5
4.
Operating the Diagnostic Controller . . . . . . . . . . . . . . . . . . . . 6
5.
Explanation of the program . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Menu selection
Diagnosis . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Fault finding . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Test and measurement values . . . . . . . . . . . . . . . . . . . . . . . 10
Control equipment data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Functional test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
System Check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Read-only data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Cancel faults . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Multimeter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
ISO addresses, Help messages, Versions, testable ECUs
5.1
5.1.1
5.1.2
5.1.3
5.1.4
5.1.5
5.1.6
5.2
5.3
5.4
5.5
5.6
6.
Fault finding example “Cable break - movement sensor” . . . 15
7.
Malfunctions “Diagnosis” . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
8.
Circuit diagrams 4x2-A, 6x2-A, Bus-A . . . . . . . . . . . . . . . . . . 20
Abbreviations used
ECAS
ECU
Counts
AA
HA
LA
SA
VA
k(Ω)
4x2
6x2
KW
V1
2
Electronically Controlled Air Suspension
Electronic Control Unit
unit of measurement for movement or pressure sensor values
drive axle
rear axle
lift axle
trailing axle
front axle
kilo(ohm)
description code: 4 wheels, two of them driven
description code: 6 wheels, two of them driven
calendar week
version 1
1.
BRIEF DESCRIPTION OF
THE “ECAS” SYSTEM
The ECAS electronics 446 055 ... 0, combined with movement sensor 441 050 ... 0,
solenoid valve 472 900 / 905 ... 0 and
operating unit 446 056 ... 0, operates the
automatic level regulation of commercial
vehicles with air suspension. Distinctions
are drawn between 4x2, 6x2 and bus
systems with an appropriate range of
equipment (eg., partial air, full air, trailing
axle, lift axle).
The ECAS can fulfil other functions:
The ECAS system regulates the specified
level by continuous comparison between the
actual heights measured (on an inductive
basis) by the movement sensors, and the
specified heights stored in the electronics. In
the event of deviations between these
values, solenoid valves are activated and
the airbags pressurized or depressurized
until the specified level is again achieved.
The specified level can be the standard level
(running level), but it can also be any other
stored level.
All height adjustments take place within preselectable tolerance limits.
Adjustments to the level are introduced in a
matter of seconds when the vehicle is at a
standstill. In motion (recognized by a
tachometer signal), they only take place
after a delay of approximately 60 seconds.
–
automatic upper and lower height
limitation
–
correction of transverse stability
–
level and pressure checks
–
fault recognition and display
–
raise/lower lift-axle
–
load/unload trailing axle
–
start-up assistance
–
zero-point adjustment with raised liftaxle
–
LSV control
–
maintenance of residual pressure to
avoid crushing the airbags
–
kneeling (for buses), lowering over one
wheel, or the whole side, to assist
boarding at bus stops
–
start-up lock (for buses)
–
door release (for buses)
–
storage and retrieval of freely selectable
levels by means of the operating unit
When faults are recognized, the indicator
lamp lights up, and the faults are
permanently stored for diagnostic purposes
in the control electronics.
The level can be deliberately altered uing the
ECAS operating unit (truck) or the operating
switch (bus). After the change has been
completed, it, is then stored as the new
specified level. Re-adjustment takes place
automatically if there is a change in load.
3
2.
DIAGNOSTIC COMPONENTS
1
2
7
6
TRUCK 4x2-A
1
3
4
5
6
7
4
3
5
Diagnostic controller
Program card
25-pin measuring adaptor
Multimeter cable, black
Multimeter cable, red
25-pin connecting adaptor
or
Connecting cable (ISO 9141)
446 300 320 0
446 300 521 0
446 300 311 0
894 604 301 2
894 604 302 2
446 300 317 0
894 604 303 2
ECAS 6x2-A or ECAS Bus-A
1
2
3
4
5
6
7
Diagnostic controller
Program card 6x2-A or
Program card Bus-A
35-pin measuring adaptor
Multimeter cable, black
Multimeter cable, red
35-pin connecting adaptor
or
universal 35-pin connector adaptor
or
Connecting cable (ISO 9141)
The Diagnostic Controller Set
consists of Diagnostic Controller
and carrying case
4
446 300 320 0
446 300 527 0
446 300 529 0
446 300 314 0
894 604 354 2
894 604 355 2
446 300 316 0
446 300 327 0
894 604 303 2
446 300 331 0
446 300 320 0
446 300 022 2
3.
CONNECTIONS
3.1
Vehicle with an ISO 9141
Central Diagnostic Socket
When the diagnosis has been completed,
the connecting adaptor must be removed!
The diagnostic socket in the vehicle must
correspond to the pin allocation in ISO 9141
as given below. To record the diagnosis,
plug the connecting cable to the vehicle’s
ISO socket.
Pin allocation
in the diagnostic
socket:
1
1
2
2
8
8
10
1 Battery positive - (terminal 30)
2 Battery negative - (terminal 31)
8 Diagnostic K-cable
10 Diagnostic L-cable
3.2
Using the connecting adaptor, the pin
allocation of the DB-9 „Diagnostic Input“
plug on the front of the diagnostic controller
is as follows:
Vehicles without ISO 9141
Central Diagnostic Socket
If the vehicle does not have an ISO 9141
diagnostic socket, connect the diagnostic
controller using a connecting adaptor
(accessory). With the ignition switched off,
the connecting adaptor is plugged in
between the vehicle cabling and the
electronics.
ECAS-ECU
9
1 Battery positive (terminal 30)
2 Battery negative (terminal 31)
8 Diagnostic K-cable
10 Diagnostic L-cable
Connect the 9-pin plug of the connecting
cable or connecting adaptor to the
diagnostic controller. This provides both the
diagnostic connection and the power supply.
Black bars appear on the display screen.
The connecting adaptor’s red rocker
switch must be in the “1” position; this
ensures the power supply to the ECU.
Push the program card into the special slot.
Ensure that the side of the card with the
contacts is uppermost.
The following display or a similar one
appears, depending on the program card.
If not, refer to Section 7, Fault
Causes.
ECAS 6x2
Version 1.00 (English)
START
Connecting adaptor
Vehicle cabling
The first screen displays the System and
version (1.00 in the example). Press the
right-hand key.
5
4.
OPERATING THE DIAGNOSTIC CONTROLLER
The diagnostic controller is operated by
means of 3 operating keys on the front, or via
the external keypad. The assignment of keys
depends on the instructions which appear on
the display directly above the keys.
Operating the External Keypad
446 300 328 0
1 Diagnosis
4 Cancel faults
2 System Check
5 Multimeter
3 Read-only data
6 Options
Select function!
REVERSE ê MORE
Display instructions
(Function)
Operating keys
Key
Function
START
start program
EXIT
display reverts to previous
menu or program step.
(ARROW) selection of an item in the main
menu.
The next menu item is selected
ê
each time the key is depressed.
The selected menu item flashes.
CONTINUE:
the menu item selected before is
activated/cancelled.
ESCAPE in the event of malfunction you
can escape from the current
function.
6
The external keypad facilitates entry of
numerical values. The keypad is not
absolutely essential for the program cards
described in these instructions.
Functions are only assigned to the marked
keys.
E
N
T
E
R
0
The keys
can be used
instead of the three operating keys on the
diagnostic controller.
Exception: if it is necessary to enter figures
during the program, this function does not
apply.
1
9
Using the ten-key block 0
it is possible either to enter numerical data
(for example ISO addresses) or to select
numbered items from the main menu.
5.
PROGRAM STRUCTURE
Menu Selection ECAS 4x2-A 446 300 521 0
E
N
T
E
R
Using the
key, the menu item indicated
is executed. The key has the same function
as the controller key CONT.
– 1 Diagnosis
– 1 Fault finding
– 2 Control
–
–
–
–
C
Using
you can revert to the previous
main menu displayed.
1 Lift/lower
2 Pressurize-valve
3 Lamp test
4 LSV (optional)
– 3 Test and Measurement Values
*
, when there is a series of data
Using
displayed (eg., parameter, function test,
calibration data), you can revert to the
previous display.
–
–
–
–
–
1 Movement sensor values
2 Tachometer signal
3 Switch settings
4 Remote operation
5 Test of the L-cable
– 4 Control Equipment Data
– 1 Parameters
– 2 WABCO data
– 3 Memory data
– 5 Functional Test
– 6 Calibration
– 1 Calibrate
– 2 Display calibration data
– 2 System Check
– 3 Read-Only Data
– 4 Cancel faults
– 5 Multimeter
– 1 Direct current
– 2 Alternating current
– 3 Resistance
– 6 Options
–
–
–
–
1
1
3
4
ISO addresses
Help messages
Version
Testable ECUs
7
Menu Selection ECAS 6x2-A 446 300 527 0
Menu Selection ECAS Bus-A 446 300 529 0
– 1 Diagnosis
– 1 Diagnosis
– 1 Fault finding
– 1 Fault finding
– 2 Control
– 2 Control
–
–
–
–
–
–
–
–
–
–
–
1 Lift/lower
2 Pressurize-valve
3 Lamp test
4 Lift-axle/bag
5 LSV (optional)
– 3 Test and Measurement Values
–
–
–
–
–
–
1 Movement sensor values
2 Tachometer signal
3 Switch settings
4 Remote operation
5 Test of the L-cable
6 Voltage
– 4 Control Equipment Data
– 1 Parameters
– 2 WABCO data
– 3 Memory data
– 5 Functional Test
1 Lift/lower
2 Pressurize-valve
3 Lamp test
4 Control outputs
5 Throttle test
6 Kneeling function
– 3 Test and Measurement Values
–
–
–
–
–
1
2
3
4
5
Movement sensor values
Tachometer signal
Switch settings
Voltages
Pressure sensor value
– 4 Control Equipment Data
– 1 Parameters
– 2 WABCO data
– 5 Functional Test
– 6 Calibration
– 6 Calibration
–
–
–
–
– 1 Calibrate
– 2 Display calibration data
– 2 System Check
1
2
3
4
Calibrate movement sensor
Display movement sensor data
Calibrate pressure sensor
Display pressure sensor data
– 3 Read-Only Data
– 2 System Check
– 4 Cancel faults
– 3 Multimeter
– 5 Multimeter
– 1 Direct current
– 2 Alternating current
– 3 Resistance
– 6 Options
–
–
–
–
8
1
2
3
4
ISO addresses
Help messages
Version
Testable ECUs
– 1 Direct current
– 2 Alternating current
– 3 Resistance
– 4 Options.
–
–
–
–
1
2
3
4
ISO addresses
Help messages
Version
Testable ECUs
5.1
Diagnosis
When the diagnostic function is called up
from Menu Item 1, the connection is made to
the ECAS control unit.
1 Diagnosis
4 Cancel faults
2 System Check
5 Multimeter
3 Read-only data
6 Options
Select function!
EXIT
ê
CONT.
Let the cursor flash on „1“, and press the
"CONT." key (the example shown here is for
the ECAS 6x2-A).
Equipment type : ECAS 6x2
WABCO Equipment No. : 446 055 040 0
Production date: KW 38.1991
Software No.: 1.0.0.0
CONT.
The ECAS ECU data are displayed.
1 Fault finding
4 Control equip’t data
2 Control
5 Functional test
3 Test & measurem’t values 6 Calibration
Select function!
EXIT
ê CONT.
The following functions can be selected in
diagnostic mode, and the indicator lamp
flashes or lights up, depending on the
system.
5.1.1 Fault finding
If the ECAS control unit has detected a fault
in the system (indicator lamp lights up or
flashes), this function will help to find the
fault. Depending on the ECAS system and
the type of fault, the following information is
displayed:
–
Cause and location of fault displayed in
clear, eg., “fault in movement sensor rear
right”, “cable break or impedance too
high”.
–
Indication of how frequently the fault has
occurred.
–
The display “fault currently present"
means that the fault was still present
when the diagnostic mode was selected.
There then arises a more detailed fault
finding path with concrete instructions for
fault correction. An example is given on
page 15. The display “fault is not
currently present" means the fault was
not present when diagnostic mode was
selected, ie., the fault cannot be found
through the fault finding process
(electrical measurements). An example
of thhis is an intermittent contact.
On selection, electrical measurements
(resistance, for example) can be carried out
using the integral multimeter with the aid of
the measuring adaptor. To this end, the
desired and actual values are displayed.
After confirmation that repair has been
carried out, the fault is cancelled in the ECU.
It is only possible to quit the fault search path
when all faults have been cleared or when
the ignition is switched off.
5.1.2 Control
Using the "Control" function, specific
components in the ECAS system can be
controlled and their function checked. For
the ECAS 6x2-A and ECAS Bus-A programs
the following applies: if a fault is detected
during the control of the valves, a fault is
reported and the control remains ineffective
(for example, obstruction in valve, front
axle).
9
Lift/Lower
Control Outputs (only for Bus-A)
Using this function it is possible – depending
on the equipment – to control the solenoid
valves on the front and rear axle and/or the
individual airbags, and to read of the
movement sensor values on the display. The
relevant movement sensor value can be
increased by operating the pressurize key.
The start-up lock and door release can be
controlled. By pressing the “A” or “B” keys,
the display shows whether the start-up lock
and/or door release are switched on or off.
This value can be decreased by operating
the depressurize key.
It no movement sensor is connected, the
value “255” appears at the relevant point.
When there is a short circuit “0” is displayed.
Pressurize-valve
The “pressurize-valve” or “central 3/2-way
valve” is in series with the 2/2-way valves,
and determines whether “Lift” or “Lower”
operates. It is switched exclusively by the
ON key, independently of the 2/2-way
valves. The movement sensor values must
not change after the key has been operated;
if they do, there is a leak in one of the 2/2-way
valves.
Lamp Test
Depending on the system, using the lamp
test, various lamps can be switched on by a
keystroke. These can include the indicator
lamp, warning lamp, display lamp(s) for
raised lift-axle, and start-up assistance.
Lift-axle (display depends on system)
The lift-axle can be raised or lowered. By
using the RAISE or LOWER key, the valves
on the lift-axle and the airbag valve can
either be operated for 5 seconds or for the
length of time the key is depressed. The “5
sec.” control position should be selected for
a complete lift or lower operation.
10
Load Sensing Valve
(display depends on system)
By pressing the key marked “A” a solenoid
valve is triggered which supplies the LSV
regulator with supply pressure instead of
airbag pressure.
Throttle Test (only for Bus-A)
With this function it is possible to trigger the
transverse throttle or the main stream
throttle.
Kneeling Function (only for Bus-A)
Depending on the options selected, the
appropriate valves are triggered to test the
kneeling function.
5.1.3 Test and measurement values
Movement Sensor Values
The current movement sensor values are
displayed.
Tachometer Signal
With this function, the connection to the
signal output of the tachometer can be
checked. The vehicle must first be brought
up to a speed, for instance on a rolling test
rig, at which the tachometers gives a signal
(faster than 1 km/h) .
Switch Settings
WABCO Data
This function permits the status of various
switches to be displayed. Operate switch in
vehicle for this.
The ECAS control equipment data are
displayed. These are ECU model, equipment number, production date and ECU
software number.
Remote Operation
The function of the ECAS operating unit and/
or the operating switch/key can be checked.
Connect operating unit and operate all keys
one after another. The display indicates the
key being operated.
Test of the L-cable
An automatic check is made to ascertain
whether the “L-cable diagnosis” has a short
circuit or a break.
Voltage (display depends on system)
The current value for the operating voltage
and, if applicable, the voltages of the valve
relays are indicated.
Note: the valve relay voltage is
approximately 0.7 V lower than the operating
voltage.
Pressure Sensor Value (display depends
on system)
The current pressure sensor value is
displayed.
5.1.4 Control Equipment Data
Parameters
The parameters are system-specific ECU
settings which can be displayed by means of
the diagnostic controller. With the
accompanying program card 446 300 5.. 0
the parameters cannot be altered.
Memory Data (not for Bus-A)
The values for M1 and M2 stored in memory
using the ECAS operating unit are displayed
as count values for the movement sensors.
These values have been stored by means of
the ECAS operating unit by simultaneously
pressing the “STOP” and “M1”, or “STOP”
and “M2” keys.
5.1.5 Functional test
This section combines items 5.1.2 “Control”
and 5.1.3 “Test and Measurement Values”.
The test procedures, which are set out here
in another sequence, enable all system
components to be checked in turn. Selection
of this segment is particularly recommended
after comprehensive repairs. On the other
hand, item 5.2 "System Check" is to be
selected for the initial installation of the
ECAS system.
5.1.6 Calibration
The system calibration is intended largely to
counter the installation tolerances which
arise when the ECAS is installed, together
with equipment tolerances. Re-calibration is
also necessary when sensor or electronics
are changed.
How is the calibration made?
Using the "Control" key, the vehicle is
brought to the desired normal level (running
level). By operating the keys, the actual level
is stored as the normal level. Depending on
the system, further levels (upper and lower
level) are calibrated in the same way.
11
Note: at least the normal level must be
known, for instance as a distance between
the frame and the axle, in accordance with
the vehicle manufacturer’s data. It should
also be known whether the upper and lower
level are the buffer stops, for instance, or
whether other levels must be calibrated.
Fault recognition during system
calibration
If the calibration is recognised as being
incorrect, the calibration data can be read
using the "display calibration data" menu
item. The calibration level positions must
have a clear and unambiguous allocation.
A calibration must fulfil the following
requirements:
airbag is completely depressurized using
the operating keys on the Diagnostic
Controller.
Display Pressure Sensor Value
(optional)
The calibrated value of the pressure sensor
is displayed.
5.2.
System Check
After the installation of the ECAS system a
complete test of the system can be carried
out using the "system check" function. The
appropriate wiring diagram for the system
must be used:
–
electrical
measurements
of
the
components using the integral multimeter
b) <255 counts
–
c) the upper stop level must be greater than
normal level (in counts) + 3 x (tolerance
of specified level) + 3 counts
control of the components (see 5.1.2 for
explanation)
–
test and measurement values (see 5.1.3
for explanation)
d) the lower stop level must be less than
normal level - 2 x (tolerance of specified
level).
–
calibration of the system (see 5.1.6 for
explanation)
Note: the tolerances of the specified level
front/rear are laid down in parameter 6/7
(ECAS 4x2-A) and parameter 7/8 (ECAS
6x2-A) and parameter 10/12 (ECAS Bus-A).
5.3.
a) the movement sensor values entered
must be >4 counts and
Display Calibration Data
The calibration data stored in the ECAS
control unit are displayed.
Read-only Data (free-running
protocol - not for Bus-A)
This function is only possible with some
ECUS. After switching on the ignition, the
ECAS control unit provides recurring data
messages with the following content:
–
customer-specific data
–
current and stored fault, numbers
–
system-specific values
Calibrate Pressure Sensor (optional)
The pressure sensor is calibrated at
atmospheric pressure. The connected
12
The data messages can be displayed under
this menu item.
5.4.
Cancel Faults (not for Bus-A)
This function is to cancel all faults stored at
one time. If the fault is still present, it is
immediately re-entered in the ECU. The
“Cancel Faults” function is only possible with
certain ECUs.
5.5.
Multimeter
Application:
Direct voltages: vehicle supply system
voltage
Resistances: valves, relays, sensors, line
dip
1 DC Voltage
2 AC Voltage
Select function!
3 Resistance
EXIT
ê
CONT.
Electrical measurements can be carried out
within the range appropriate to the vehicle
(low voltage) by using the integral multimeter
function. To do this, only the desired
measurement function (direct current,
alternating current or resistance) need be
selected. The range of measurement is set
automatically by the equipment.
Warning:
The measuring equipment may only be used
within the following ranges:
Range
Display
definition
Accuracy of extreme value in
range at 20 °C
DC
2.0 Volt
20.0 Volt
50.0 Volt
0.1 Volt
0.1 Volt
0.1 Volt
± 0.2 %
± 0.2 %
± 0.2 %
± 0.0 Volt
± 0.1 Volt
± 0.1 Volt
AC
2.0 Volt
35.0 Volt
0.01 Volt
0.1 Volt
± 0.6 %
± 0.6 %
± 0.02 Volt
± 0.4 Volt
Resistance
20.0 kΩ
200.0 kΩ
2.0 kΩ
20.0 kΩ
95.0 kΩ
0.1 Ω
0.1 Ω
1.0 Ω
10.0 Ω
100.0 Ω
± 0.3 %
± 0.2 %
± 0.2 %
± 0.1 %
± 0.2 %
± 0.1 Ω
± 0.1 Ω
± 1.0 Ω
± 10.0 Ω
± 100.0 Ω
13
5.6.
Options
Testable ECUs
Options include the following sub-sections:
ISO Addresses
The DIAGNOSTIC CONTROLLER uses the
ISO address to communicate with the
appropriate vehicle electronics when the
system starts up. Using the ISO address, the
ECU recognises that it has to commence
data traffic with the CONTROLLER. Each
type of electronics therefore has its own
amendable address (for example ECAS
articulated bus = 16, trailer = 17).
Help messages
This function gives the operator the
possibility of obtaining additional assistance
in operating. If the function is switched on at
suitable points between the program steps,
more detailed explanations of the program
appear.
The display indicates which ECAS
electronics can be tested with this program
card.
Basically, however, other (future) ECAS
ECUs of the same type series will also be
testable, so that the program card – within
certain limits – is upwardly compatible.
Cards 446 300 5.. 0 basically recognise
whether the ECU is testable. If not, they
automatically prevent diagnostic operation
(see “Malfunctions”).
Program card
Testable ECUs *
ECAS 4x2-A
446 055 020 0
446 300 521 0
⇓
446 055 026 0
ECAS 6x2-A
446 055 040 0
446 300 527 0
446 055 041 0
446 055 042 0
446 055 044 0
Versions
446 055 046 0
Hardware:
Operating system:
Program:
Checksum:
V1 multimeter: V1
V3.1 (7.3.91)
V1.00 (3.3.93)
BC 99 (hex) CONT.
446 055 047 0
ECAS Bus-A
448 055 050 0
446 300 529 0
446 055 051 0
446 055 052 0
This function shows the as-delivered status
of the Controller used and of the
program card:
–
controller hardware
–
controller operating system with version
and production date
–
multimeter version
–
program card with version, production
date and checksum
14
446 055 054 0
* as at 09/1995
6.
EXAMPLE OF FAULT
FINDING “MOVEMENT
SENSOR CABLE BREAK”
(6x2)
The fault finding is explained in this section,
using an example.
Two faults are stored
in the ECAS-ECU
CONT.
Check rear left movement sensor
line and plug connection for damage.
Fault found?
NO
YES
Check components visually for damage. If
fault has been found, confirm with "YES". If
not, answer "NO" to go on to the next step.
Switch off ignition!
THEN disconnect ECAS ECU
connect measuring adaptor
and switch on ignition!
CONT.
This display only appears if more than one
fault has been stored.
Fault in rear left movement sensor
(Cable break or impedance too high)
The fault is currently present!
(1x occurred)
CONT.
REPAIR
Always switch off the ignition when
disconnecting the ECU! The measuring
adaptor must be firmly plugged into the
cabling plug.
ECAS 4x2: measuring adaptor 25-pin
ECAS 6x2: measuring adaptor 35-pin.
Fault location (movement sensor rear left)
and type (cable break or impedance) are
displayed.
In addition, there is an indication of whether
the fault was actually present when the
diagnosis started.
If the fault occurs several times (eg., an
intermittent contact) the frequency is
indicated
Note: If the 25-/35-pin connecting adaptor is
used, the power supply can be switched off
at the adaptor’s rocker switch (corresponds
to “Ignition Off”). This way the Diagnostic
Controller remains in operation.
Measure resistance: PIN 25/27
Should be: 100 - 140 Ω is: 95 kΩ
Check actual value!
LOW OK
HIGH
The fault search is started with the REPAIR
key.
Any further faults present are then revealed
by using "CNTINUE" key. Press "REPAIR"
to initiate the fault finding path.
Connect multimeter cables (red and black)
to the multimeter sockets on the Diagnostic
Controller. In this example, the test probes
must be plugged into sockets 25 and 27 of
the measuring adaptor. Compare the actual
value (the measured value) with the specified value. Using the appropriate key, enter
whether the actual value is LOWER, within
15
the tolerance range OK or GREATER than
the specified value (on the display
illustrated, the actual value is greater then
the specified value).
Sensor, line or plugged
connection faulty.
Change defective part.
CONT.
Test the relevant parts and, if necessary,
change them.
Note: because there es a cable break the
location of the fault cannot be more precisely
determined. The parts must be tested
individually.
In the event of more than one fault, the
display would now show the other faults. If all
faults have been indicated according to the
same or similar repair instructions, the
following screen appears:
The ECAS control equipment
has no FURTHER faults stored
CONT.
No further faults are stored.
Switch off ignition!
THEN disconnect measuring
adaptor, connect ECAS ECU
and switch on ignition!
CONT.
Always switch off the ignition when
disconnecting the ECU, or operate the
rocker switch on the adaptor!
16
All REPAIRED faults have been
cancelled in the ECAS ECU!
CONT.
Note: only faults which have been repaired
have been cancelled.
The ECAS control equipment
has NO faults stored
CONT.
The fault memory is read again for checking
purposes. The display indicates that no fault
is stored in the ECU. Otherwise the fault
search would recommence.
To quit the fault search path press CONT.
7.
MALFUNCTIONS “DIAGNOSIS”
No display
Cause
Remedy
– no power supply
– low voltage (less than approx 7 V)
– check all plugged connections
– check supply voltage
Black “bars”
IIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIII
IIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIII
Cause
Remedy
– program card not pushed in
– push program card in as far as the stop
[ [ [ Low voltage [ [ [
CONT.
Cause
Remedy
– Supply voltage too low (only during
diagnostic operation)
– check battery load capacity, and ensure
adequate supply.
17
[ [ [ Initialization error [ [ [
Switch on ignition!
Check diagnostic connection
and ISO address!
CONT.
Cause
Remedy
– Supply voltage too low (less than 18 V)
– ensure adequate supply
– No supply voltage (ignition off)
– switch on ignition, or operate rocker
switch on adptor
– ISO address incorrect
– re-enter ISO address.
Pre-set ECAS: address 16
(see 5.6 “ISO Address”)
– Incorrect ECU, or no ECU connected
– check ECU and connection
– Diagnostic line broken or transposed
– check function and correct allocation of
lines and connections
[ [ [ Incorrect passwords [ [ [
no diagnosis possible!
CONT.
Cause
Remedy
– Incorrect ECU connected
– check ECU part number
– Incorrect “WABCO data” in ECU,
or ECU defective
– if correct ECU is installed, exchange it.
[ [ [ Defective program card [ [ [
Cause
Remedy
– Defective program card
– change program card
– Incorrect program card
– Program card not fully inserted
18
– push program card in as far as the stop
[ [ [ Communications break [ [ [
Re-start diagnosis!
CONT.
Cause
Remedy
– data trasfer interrupted during diagnosis
– chek all connections
– line or voltage interruption during diagnosis
a) ISO plug in vehicle: – switch on ignition
b) Connection adaptor:
– set red rocker switch in “1” position
[ [ [ Unrecognized control unit [ [ [
No diagnosis possible with this
program card!
CONT.
Cause
Remedy
– ECU cannot be tested with this program
card
– use correct program card
– EEPROM (non volatile memory of diagnostic controller) defective
– repair diagnostic controller
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Notes:
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