Chrysler Stratus LHD 1997, Interactive Electronic Service Manual

Page: 1067 / 1534

IMMOBILIZER
INDEX
page page
GENERAL INFORMATION
ARMING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
DISARMING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
ENABLING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
IMMOBILIZER RECEIVER . . . . . . . . . . . . . . . . . . 3
IMMOBILIZER SYSTEM . . . . . . . . . . . . . . . . . . . . 2
IMMOBILIZER TRANSMITTER . . . . . . . . . . . . . . . 3
VEHICLE IMMOBILIZER SYSTEM . . . . . . . . . . . . 2
DESCRIPTION AND OPERATION
IMMOBILIZER RECEIVER . . . . . . . . . . . . . . . . . . 4
POWER-UP MODE . . . . . . . . . . . . . . . . . . . . . . . . 4
GENERAL INFORMATION
IMMOBILIZER SYSTEM
The Immobilizer System prevents unauthorized
operation of the vehicle by disabling the engine. The
system will NOT allow the vehicle to start unless the
UNLOCK button on the RKE transmitter is pressed.
The system will be activated after turning the igni-
tion switch to the OFF position and using one of the
following methods.
(1) Press the LOCK button on the RKE transmitter.
(2) LOCK the doors by pressing a power lock but-
ton switch.
(3) LOCK the driver or passenger door using the key.
•
The Security light will flash, for about 16 sec-
onds, indicating that the engine will be disabled.
•
The Security light remaining on, indicates the
system is not operational.
•
The Immobilizer will activate automatically within
10 minutes of the ignition switch being in the OFF posi-
tion, whether the vehicle has been locked or unlocked.
•
An attempt to start the vehicle without pressing
the UNLOCK button on the RKE transmitter will result
in a warning chime and the Security light flashing.
NOTE: The ignition switch must be in the OFF posi-
tion in order for the system to be activated, whether
the doors are closed or not.
VEHICLE IMMOBILIZER SYSTEM
WARNING: ON VEHICLES EQUIPPED WITH AIR-
BAGS,
REFER TO GROUP 8M - PASSIVE
RESTRAINT SYSTEMS BEFORE ATTEMPTING
STEERING WHEEL, STEERING COLUMN, OR
INSTRUMENT PANEL COMPONENT DIAGNOSIS OR
SERVICE. FAILURE TO TAKE THE PROPER PRE-
CAUTIONS COULD RESULT IN ACCIDENTAL AIR-
BAG DEPLOYMENT AND POSSIBLE PERSONAL
INJURY.
NOTE: The following tests may not prove conclu-
sive in the diagnosis of this system. The most reli-
able, efficient, and accurate means to diagnose the
Vehicle Immobilizer System involves the use of a
DRB scan tool. Refer to the Vehicle Theft Security
System menu item on the DRB scan tool for the
procedures.
The vehicle immobilizer system and the data bus
network should be diagnosed using the DRB scan
tool. The DRB will allow confirmation that the bus is
functional, that the immobilizer receiver is placing
the proper messages on the bus, and that the Power-
train Control Module is receiving the bus messages.
Refer to the Vehicle Theft Security System menu
item on the DRB scan tool for the procedures. Refer
to 8W-39 - Vehicle Theft Security System in Group
8W - Wiring Diagrams for complete circuit descrip-
tions and diagrams.
(1) With the ignition switch in the Off position,
depress the Lock or Unlock button of the immobilizer
transmitter. Listen for the immobilizer receiver to
issue an audible chirp (Unlock) or chirps (Lock). If
OK, go to Step 2. If not OK, replace the transmitter
batteries with known good units and repeat Step 1. If
still not OK, go to Step 2.
(2) Check the fuse in the Power Distribution Cen-
ter (PDC). If OK, go to Step 3. If not OK, replace the
faulty fuse.
(3) Disconnect and isolate the battery negative
cable. Unplug the wire harness connector at the
immobilizer receiver. Check for continuity between
the ground circuit cavity of the immobilizer receiver
connector and a good ground. There should be conti-
nuity. If OK, go to Step 4. If not OK, repair the open
circuit to ground as required.
(4) Connect the battery negative cable. Check for
battery voltage at the fused B(+) circuit cavity of the
immobilizer receiver connector. If OK, refer to the
Vehicle Theft Security System menu item on the
DRB scan tool for further diagnosis. If not OK, repair
the open circuit to the PDC fuse as required.
14 - 2 FUEL SYSTEM
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