vehicle theft/security systems

vehicle theft/security systems
VEHICLE THEFT/SECURITY SYSTEMS
LH
8Q - 1
VEHICLE THEFT/SECURITY SYSTEMS
TABLE OF CONTENTS
page
page
DESCRIPTION AND OPERATION
VEHICLE THEFT/SECURITY SYSTEM (VTSS) . . . 1
SENTRY KEY IMMOBILIZER SYSTEM (SKIS) . . . 1
SENTRY KEY IMMOBILIZER MODULE
(SKIM) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
SENTRY KEY IMMOBILIZER SYSTEM
INDICATOR LAMP . . . . . . . . . . . . . . . . . . . . . . . 3
SENTRY KEY IMMOBILIZER TRANSPONDER . . . 3
TRIGGERING THE VTSS. . . . . . . . . . . . . . . . . . . . 4
DIAGNOSIS AND TESTING
SENTRY KEY IMMOBILIZER SYSTEM (SKIS) . . . 4
VEHICLE THEFT SECURITY SYSTEM
SELF-TESTS. . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
SERVICE PROCEDURES
SENTRY KEY IMMOBILIZER TRANSPONDER
PROGRAMMING . . . . . . . . . . . . . . . . . . . . . . . . 5
REMOVAL AND INSTALLATION
BODY CONTROL MODULE . . . . . . . . . . . . . . . . . . 6
DECK LID SECURITY SWITCH . . . . . . . . . . . . . . . 6
LOCK CYLINDER SWITCH . . . . . . . . . . . . . . . . . . 6
SENTRY KEY IMMOBILIZER MODULE
(SKIM) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
DESCRIPTION AND OPERATION
After the vehicle is locked and the last door is
closed, the set LED indicator in the top cover will
flash quickly for 16 seconds, indicating that arming
is in progress. If no monitored systems are activated
during this period, the system will arm. After 16 seconds the indicator LED will continue to flash at a
slower rate.
This indicates that the system is armed. If the
deck lid key cylinder switch is not sensed by the system, the indicator LED will remain lit during the
arming process, although the system will still arm. If
the indicator LED does not illuminate at all upon
door closing it indicates that the system is not arming.
Passive disarming occurs upon normal vehicle
entry by unlocking either door with the ignition key/
remote transmitter. This disarming will also halt the
alarm once it has been activated.
A tamper alert exists to notify the driver that the
VTSS had been activated. This alert consists of 3
horn pulses when the vehicle is disarmed.
The VTSS will not arm by pushing down the door
lock mechanism. This will manually override the system.
VEHICLE THEFT/SECURITY SYSTEM (VTSS)
DESCRIPTION
The Vehicle Theft Security System (VTSS) is
designed to protect against whole vehicle theft. The
system monitors vehicle doors, deck lid key cylinder,
and ignition action for unauthorized operation. The
alarm activates:
• Sounding of the horn
• Flashing of the park and tail lamps
• Flashing of the headlamps
• An engine kill feature (without SKIS)
OPERATION
Upon failure of proper VTSS/SKIM communication
to the PCM, the PCM will shut off fuel after two seconds of run time. The engine will not re-crank on the
key cycle that the failure occurred, a full key down
sequence must be performed for the engine to crank
again. After six consecutive fuel shut-offs, the engine
will no longer crank on subsequent key cycles. The
failure must be corrected and a valid communication
process between the BCM (VTSS), or SKIM, and the
PCM must occur for the engine to crank and start
again.
The electronics for the VTSS are part of the Body
Control Module (BCM). The system is armed when
the vehicle is locked using the:
• Power door lock switches
• Remote Keyless Entry transmitter.
For vehicles equipped with SKIS, the doors do not
have to be locked to enable the fuel shut off feature.
SENTRY KEY IMMOBILIZER SYSTEM (SKIS)
DESCRIPTION
The Sentry Key Immobilizer System (SKIS) is
designed to provide passive protection against unauthorized vehicle use by preventing the engine from
operating. The components of this system are the
Sentry Key Immobilizer Module (SKIM), Body Control Module (BCM), Sentry Key transponder, VTSS
8Q - 2
VEHICLE THEFT/SECURITY SYSTEMS
LH
DESCRIPTION AND OPERATION (Continued)
Fig. 2 Sentry Key Immobilizer Module
Fig. 1 Sentry Key Immobilizer Module Location
1
2
3
4
–
–
–
–
STEERING WHEEL
IGNITION KEY CYLINDER
STEERING COLUMN
SENTRY KEY IMMOBILIZER MODULE
more than eight electronically coded Sentry Key
transponders. The SKIS programming also enables
the SKIM to communicate over the Programmable
Communication Interface (PCI) bus network with the
Powertrain Control Module (PCM), and/or the DRB
IIIt scan tool.
OPERATION
indicator LED, and the Powertrain Control Module
(PCM).
The SKIM is installed on the steering column near
the ignition lock cylinder. The transponder is located
under the molded rubber cap on the head of the ignition key. The VTSS indicator LED is located in the
instrument panel top cover.
OPERATION
The SKIS includes two valid Sentry Key transponders from the factory. These two Sentry Keys can be
used to program additional non-coded blank Sentry
Keys. These blank keys can be cut to match a valid
ignition key, but the engine will not start unless the
key transponder is also programmed to the vehicle.
The SKIS will recognize no more than eight valid
Sentry Key transponders at any one time.
The SKIS performs a self-test each time the ignition switch is turned to the ON position, and will
store Diagnostic Trouble Codes (DTC’s) if a system
malfunction is detected. The SKIS can be diagnosed,
and any stored DTC can be retrieved using a DRB
IIIt scan tool as described in the proper Body Diagnostic Procedures Manual.
SENTRY KEY IMMOBILIZER MODULE (SKIM)
DESCRIPTION
The Sentry Key Immobilizer Module (SKIM) contains a Radio Frequency (RF) transceiver and a central processing unit, which includes the Sentry Key
Immobilizer System (SKIS) program logic. The SKIS
programming enables the SKIM to program and
retain in memory the codes of at least two, but no
The SKIM transmits and receives RF signals
through a tuned antenna enclosed within a molded
plastic ring formation that is integral to the SKIM
housing. When the SKIM is properly installed on the
steering column, the antenna ring is oriented around
the circumference of the ignition lock cylinder housing (Fig. 1). This antenna ring must be located
within eight millimeters (0.31 inches) of the Sentry
Key in order to ensure proper RF communication
between the SKIM and the Sentry Key transponder.
For added system security, each SKIM is programmed with a unique “Secret Key” code and a
security code. The SKIM keeps the “Secret Key” code
in memory and sends the code over the PCI bus to
the PCM, which also keeps this code in its memory.
The SKIM also sends the “Secret Key” code to each of
the programmed Sentry Key transponders. The security code is used by the assembly plant to access the
SKIS for initialization, or by the dealer technician to
access the system for service. The SKIM also stores
in its memory the Vehicle Identification Number
(VIN), which it learns through a PCI bus message
from the PCM during initialization.
The SKIM and the PCM both use software that
includes a rolling code algorithm strategy, which
helps to reduce the possibility of unauthorized SKIS
disarming. The rolling code algorithm ensures security by preventing an override of the SKIS through
the unauthorized substitution of the SKIM or the
PCM. However, the use of this strategy also means
that replacement of either the SKIM or the PCM
units will require a system initialization procedure to
restore system operation.
LH
VEHICLE THEFT/SECURITY SYSTEMS
8Q - 3
DESCRIPTION AND OPERATION (Continued)
When the ignition switch is turned to the ON or
START positions, the SKIM transmits an RF signal
to excite the Sentry Key transponder. The SKIM then
listens for a return RF signal from the transponder
of the Sentry Key that is inserted in the ignition lock
cylinder. If the SKIM receives an RF signal with
valid “Secret Key” and transponder identification
codes, the SKIM sends a “valid key” message to the
PCM over the PCI bus. If the SKIM receives an
invalid RF signal or no response, it sends “invalid
key” messages to the PCM. The PCM will enable or
disable engine operation based upon the status of the
SKIM messages.
The SKIM also sends messages to the BCM which
controls the VTSS indicator LED. The SKIM sends
messages to the BCM to turn the LED on for about
three seconds when the ignition switch is turned to
the ON position as a bulb test. After completion of
the bulb test, the SKIM sends bus messages to keep
the LED off for a duration of about one second. Then
the SKIM sends messages to turn the LED on or off
based upon the results of the SKIS self-tests. If the
VTSS indicator LED comes on and stays on after the
bulb test, it indicates that the SKIM has detected a
system malfunction and/or that the SKIS has become
inoperative.
If the SKIM detects an invalid key when the ignition switch is turned to the ON position, it sends
messages to flash the VTSS indicator LED. The
SKIM can also send messages to flash the LED and
to generate a single audible chime tone. These functions serve as an indication to the customer that the
SKIS has been placed in its “Customer Learn” programming mode. See Sentry Key Immobilizer System
Transponder Programming in this section for more
information on the “Customer Learn” programming
mode.
For diagnosis or initialization of the SKIM and the
PCM, a DRB IIIt scan tool and the proper Body
Diagnostic Procedures Manual are required. The
SKIM cannot be repaired and, if faulty or damaged,
the unit must be replaced.
SENTRY KEY IMMOBILIZER SYSTEM
INDICATOR LAMP
DESCRIPTION
The Sentry Key Immobilizer System (SKIS) uses
the Vehicle Theft Security System (VTSS) indicator
LED to give an indication when the SKIS is faulty or
when the vehicle has been immobilized due to the
use of an invalid ignition key. The LED is controlled
by the BCM based upon messages received from the
Sentry Key Immobilizer Module (SKIM). The VTSS/
SKIS indicator LED is hard wired directly to the
BCM.
OPERATION
The SKIM sends messages to the BCM to turn the
LED on for about three seconds when the ignition
switch is turned to the ON position as a bulb test.
After completion of the bulb test, the SKIM sends
bus messages to the BCM to keep the LED off for a
duration of about one second. Then the SKIM sends
messages to the BCM to turn the LED on or off
based upon the results of the SKIS self-tests. If the
VTSS indicator LED comes on and stays on after the
bulb test, it indicates that the SKIM has detected a
system malfunction and/or that the SKIS has become
inoperative. If the SKIM detects an invalid key when
the ignition switch is turned to the ON position, it
sends messages to the BCM to flash the VTSS indicator LED.
The SKIM can also send messages to the BCM to
flash the LED and to generate a single audible chime
tone. These functions serve as an indication to the
customer that the SKIS has been placed in its “Customer Learn” programming mode. See Sentry Key
Immobilizer System Transponder Programming in
this section for more information on the “Customer
Learn” programming mode.
The VTSS indicator LED is housed in the Automatic Temperature Control (ATC) Sun Sensor located
in the instrument panel top cover. Refer to Group 8E
- Instrument Panel and Systems for service of ATC
Sun Sensor. If the VTSS indicator LED comes on and
stays on after the bulb test function, diagnosis of the
SKIS should be performed with a DRB IIIt scan tool
and the proper Body Diagnostic Procedures Manual.
SENTRY KEY IMMOBILIZER TRANSPONDER
DESCRIPTION
The Sentry Key Immobilizer System (SKIS) uses a
transponder that is integral to each of two ignition
key that are supplied with the vehicle when it is
shipped from the factory. The transponder chip is
insulated within a nylon mount inserted in the head
of the key, and invisible beneath a molded rubber
cap.
OPERATION
Each Sentry Key transponder has a unique transponder identification code programmed into it by the
manufacturer. The Sentry Key Immobilizer Module
(SKIM) has a unique “Secret Key” code programmed
into it by the manufacturer. When a Sentry Key
transponder is programmed into the memory of the
SKIM, the SKIM learns the transponder identification code from the transponder, and the transponder
learns the “Secret Key” code from the SKIM. Each of
these codes is stored within the transponder and in
the nonvolatile memory of the SKIM. Therefore,
8Q - 4
VEHICLE THEFT/SECURITY SYSTEMS
LH
DESCRIPTION AND OPERATION (Continued)
CAUTION: The VTSS indicator LED will trigger and
engine will continue to run if the vehicle is
equipped with SKIS and the proper key is used to
start the vehicle. This condition will occur if the
VTSS has been triggered.
NOTE: The ignition switch can be turned to the
accessory position without triggering alarm system.
DIAGNOSIS AND TESTING
SENTRY KEY IMMOBILIZER SYSTEM (SKIS)
Fig. 3 Sentry Key Immobilizer Transponder
1
2
3
4
–
–
–
–
MOLDED CAP
TRANSPONDER
MOLDED CAP REMOVED
SENTRY KEY
blank keys for the SKIS must be programmed by and
into the SKIM, in addition to being cut to match the
mechanical coding of the ignition lock cylinder. See
Sentry Key Immobilizer System Transponder Programming in this section for more information.
The Sentry Key transponder is within the range of
the SKIM transceiver antenna ring when it is
inserted in the ignition lock cylinder. When the ignition switch is turned to the START or ON positions,
the SKIM transceiver issues a Radio Frequency (RF)
signal that excites the transponder chip. The transponder chip responds by issuing an RF signal containing its transponder identification code and the
“Secret Key” code. The SKIM transceiver compares
the transponder codes with the codes stored in its
memory to determine whether a valid key is in the
ignition lock cylinder.
The Sentry Key transponder cannot be repaired
and, if faulty or damaged, it must be replaced.
TRIGGERING THE VTSS
DESCRIPTION
Any of the following actions will trigger the system:
(1) Opening any door.
(2) Removing the deck lid lock cylinder.
(3) Turning the ignition to the ON position.
OPERATION
Using the power door switch or the keyless transmitter will arm the system.
WARNING: ON VEHICLES EQUIPPED WITH AIRBAGS, REFER TO GROUP 8M - PASSIVE
RESTRAINT SYSTEMS BEFORE ATTEMPTING ANY
STEERING WHEEL, STEERING COLUMN, OR
INSTRUMENT PANEL COMPONENT DIAGNOSIS OR
SERVICE. FAILURE TO TAKE THE PROPER PRECAUTIONS COULD RESULT IN ACCIDENTAL AIRBAG DEPLOYMENT AND POSSIBLE PERSONAL
INJURY.
NOTE: The following tests may not prove conclusive in the diagnosis of this system. The most reliable, efficient, and accurate means to diagnose the
Sentry Key Immobilizer System involves the use of
a DRB IIIT scan tool. Refer to the proper Body Diagnostic Procedures Manual.
The Sentry Key Immobilizer System (SKIS) and
the Programmable Communication Interface (PCI)
bus network should be diagnosed using a DRB IIIt
scan tool. The DRB IIIt will allow confirmation that
the PCI bus is functional, that the Sentry Key Immobilizer Module (SKIM) is placing the proper messages
on the PCI bus, and that the Powertrain Control
Module (PCM) is receiving the PCI bus messages.
Refer to the proper Body Diagnostic Procedures Manual, and Group 8W, Wiring Diagrams for complete
circuit descriptions and diagrams.
(1) Check the fuses in the junction block. If OK, go
to Step 2. If not OK, repair the shorted circuit or
component as required and replace the faulty fuse.
(2) Disconnect and isolate the battery negative
remote cable from the remote terminal. Unplug the
wire harness connector at the SKIM. Check for continuity between the ground circuit cavity of the
SKIM wire harness connector and a good ground.
There should be continuity. If OK, go to Step 3. If not
OK, repair the open circuit to ground as required.
(3) Connect the battery negative remote cable.
Check for battery voltage at the fused B(+) circuit
cavity of the SKIM wire harness connector. If OK, go
LH
VEHICLE THEFT/SECURITY SYSTEMS
8Q - 5
DIAGNOSIS AND TESTING (Continued)
to Step 4. If not OK, repair the open circuit to the
fuse in the junction block as required.
(4) Turn the ignition switch to the ON position.
Check for battery voltage at the fused ignition switch
output (run/start) circuit cavity of the SKIM wire
harness connector. If OK, use a DRB IIIt scan tool
and the proper Body Diagnostic Procedures Manual
to complete the diagnosis of the SKIS. If not OK,
repair the open circuit to the fuse in the junction
block as required.
VEHICLE THEFT SECURITY SYSTEM
SELF-TESTS
A diagnostics test mode is available in the system
to verify operation of all monitored switches or circuits. To enter diagnostics, use the DRB IIIt and the
proper Body Diagnostic Procedures Manual.
When the diagnostics test mode is activated, the
horn will pulse twice to indicate that the trunk key
cylinder is in its proper position. Placing the key in
the ignition will allow the warning lamp, headlamps
and park/tail lamps to be checked for proper flashing
operation. Remove the ignition key from the ignition
switch in order to check for door lock cylinder switch
operation. At the completion of each of the following
operations, a horn pulse will occur to indicate proper
operation. Each action must be separated by a minimum of one second or horn pulse will not occur.
• Open then close each door one at a time.
• Rotate the key in each of the door lock cylinder
to the unlock position.
• Cycle the ignition switch key to the ON position
as the last step. A single horn pulse will indicate
proper operation of the ignition switch. This will also
take the system out of the stand alone diagnostic
mode.
The self diagnostic mode may also be exited by
using the scan tool.
When the RKE lock button is pressed, the BCM
will also pulse the horn. This is part of the RKE normal operation.
SERVICE PROCEDURES
SENTRY KEY IMMOBILIZER TRANSPONDER
PROGRAMMING
Two programmed Sentry Key transponders are
included with the Sentry Key Immobilizer System
(SKIS) when it is shipped from the factory. The Sentry Key Immobilizer Module (SKIM) can be programmed to recognize up to six additional
transponders, for a total of eight Sentry Keys. The
following “Customer Learn” programming procedure
for the programming of additional transponders
requires access to at least two of the valid Sentry
Keys. If two valid Sentry Keys are not available, Sentry Key programming will require the use of a DRB
IIIt scan tool and the proper Body Diagnostic Procedures Manual.
CUSTOMER LEARN
(1) Obtain the additional Sentry Key transponder
blank(s) that are to be programmed for the vehicle.
Cut the additional Sentry Key transponder blanks to
match the ignition lock cylinder mechanical key
codes.
(2) Insert one of the two valid Sentry Key transponders into the ignition switch and turn the ignition switch to the ON position.
(3) After the ignition switch has been in the ON
position for about three seconds, but no more than
fifteen seconds, cycle the ignition switch back to the
OFF position. Replace the first valid Sentry Key in
the ignition lock cylinder with the second valid Sentry Key and turn the ignition switch back to the ON
position. Both operations must be performed within
15 seconds.
(4) About ten seconds after the completion of Step
3, the VTSS indicator LED will start to flash and a
single audible chime tone will sound to indicate that
the system has entered the “Customer Learn” programming mode.
(5) Within about fifty seconds of entering the “Customer Learn” programming mode, turn the ignition
switch to the OFF position, replace the valid Sentry
Key with a blank Sentry Key transponder, and turn
the ignition switch back to the ON position.
(6) About ten seconds after the completion of Step
5, a single audible chime tone will sound and the
VTSS indicator LED will stop flashing and stay on
solid for about three seconds to indicate that the
blank Sentry Key transponder has been successfully
programmed. The SKIS will immediately return to
normal system operation following exit from the
“Customer Learn” programming mode.
(7) Go back to Step 2 and repeat this process for
each additional Sentry Key transponder blank to be
programmed.
If any of the above steps is not completed in the
proper sequence, or within the allotted time, the
SKIS will automatically exit the “Customer Learn”
programming mode. The SKIS will also automatically
exit the “Customer Learn” programming mode if it
sees a non-blank Sentry Key transponder when it
should see a blank, if it has already programmed
eight valid Sentry Keys, or if the ignition switch is
turned to the OFF position for more than about fifty
seconds.
8Q - 6
VEHICLE THEFT/SECURITY SYSTEMS
LH
REMOVAL AND INSTALLATION
BODY CONTROL MODULE
For service of the Body Control Module (BCM),
refer to Group 8E, Instrument Panel and Systems for
Removal and Installation.
NOTE: If the BCM is replaced, the VTSS must be
enabled in the new BCM via the DRB lllT, in order to
start the vehicle.
DECK LID SECURITY SWITCH
REMOVAL
(1) Open hood, disconnect and isolate the negative
battery cable remote terminal from the remote battery post.
(2) Refer to Group 23 Body, for Deck Lid Latch
Removal and Installation.
(3) Disconnect connector and remove deck lid lock
cylinder from bracket (Fig. 4), (Fig. 5), and (Fig. 6).
Fig. 5 Deck Lid Latch - Intrepid
1
2
3
4
5
–
–
–
–
–
LOCK CYLINDER BRACKET
LOCK SET
TRUNK LID
TRUNK LID LATCH
TRUNK LOCK CYLINDER
1
2
3
4
–
–
–
–
LOCK CYLINDER BRACKET AND LOCK CYLINDER
LOCK SET
TRUNK LID LATCH
TRUNK LID
Fig. 4 Deck Lid Latch - Concorde / LHS
1
2
3
4
5
6
–
–
–
–
–
–
TRUNK LID
TRUNK LID
TRUNK LID
LOCK SET
TRUCK LID
TRUNK LID
CYLINDER BRACKET
LATCH
LOCK CYLINDER
OVER SLAM BUMPERS
Fig. 6 Deck Lid Latch - 300M
INSTALLATION
For installation, reverse the above procedures.
LOCK CYLINDER SWITCH
REMOVAL
(1) Open hood, disconnect and isolate the negative
battery cable remote terminal from the remote battery post.
(2) Refer to Group 23 Body, for door trim and
water shield Removal and Installation.
(3) Disconnect wiring clip and pigtail wire connector (Fig. 7).
(4) Remove the Door Key Cylinder Switch from
door lock cylinder.
VEHICLE THEFT/SECURITY SYSTEMS
LH
8Q - 7
REMOVAL AND INSTALLATION (Continued)
Fig. 7 Door Key Cylinder Switch
1
2
3
4
5
–
–
–
–
–
DOOR KEY CYLINDER SWITCH
LOCK CYLINDER
DOOR HANDLE
PIGTAIL CONNECTOR
CLIP
INSTALLATION
For installation, reverse the above procedures.
SENTRY KEY IMMOBILIZER MODULE (SKIM)
WARNING: ON VEHICLES EQUIPPED WITH AIRBAGS, REFER TO GROUP 8M - PASSIVE
RESTRAINT SYSTEMS BEFORE ATTEMPTING ANY
STEERING WHEEL, STEERING COLUMN, OR
INSTRUMENT PANEL COMPONENT DIAGNOSIS OR
SERVICE. FAILURE TO TAKE THE PROPER PRECAUTIONS COULD RESULT IN ACCIDENTAL AIRBAG DEPLOYMENT AND POSSIBLE PERSONAL
INJURY.
REMOVAL
(1) Open hood and disconnect the negative battery
cable remote terminal from the remote battery post
(Fig. 8).
(2) Remove knee bolster. Refer to Group 8E,
Instrument Panel Systems for Removal and Installation.
Fig. 8 Negative Battery Cable Remote Terminal
1 – RIGHT STRUT TOWER
2 – AIR CLEANER INLET TUBE
3 – REMOTE TERMINAL
(3) Remove the steering column upper and lower
shrouds. Refer to Group 19, Steering for Removal
and Installation.
(4) Disengage the steering column wire harness
from the Sentry Key Immobilizer Module (SKIM).
(5) Remove the one screw securing the SKIM to
the bottom of the steering column.
(6) Slide the SKIM away from the steering column
to clear the SKIM antenna ring from around the
ignition switch lock cylinder housing (Fig. 1).
(7) Remove the SKIM from the vehicle.
INSTALLATION
(1) For installation, reverse the above procedures.
(2) If the SKIM is replaced with a new unit, a
DRB IIIt scan tool and the proper Body Diagnostic
Procedures Manual MUST be used to initialize the
new SKIM and to program at least two Sentry Key
transponders.
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