Chrysler 300M 2002 Service Manual page 2247

VEHICLE THEFT/SECURITY
Symptom:
*DRIVER DOOR KEY FAILS TO ARM OR TO DISARM VTSS
FUSED B+ OPEN
DRIVER CYLINDER LOCK SWITCH MUX CIRCUIT SHORTED TO GROUND
DRIVER CYLINDER LOCK SWITCH MUX CIRCUIT OPEN
DRIVER CYLINDER LOCK SWITCH
BCM--VTSS WON'T ARM OR DISARM WITH DOOR KEY
TEST
1 With the DRBIII in Sensors, read the DRV DOOR ARM/DISARM SW voltage.
Note: The voltage measurements are not the same for the driver and passenger lock
cylinders.
Rotate the Key in the Driver Cylinder Lock to the lock and unlock positions.
Does the DRBIII display 3.5-4.5 volts in the lock position and 6.0-7.0 volts in the
unlock position
Yes → Replace and program the Body Control Module.
→ Go To 2
No
2 Disconnect the Driver Cylinder Lock Switch harness connector
Using a 12-volt test light connected to ground, check the Fused B+ circuit.
Does the test light illuminate?
Yes → Go To 3
→ Repair the Driver Cylinder Lock Switch Fused B+ circuit for an
No
3 Disconnect the Body Control Module C4 harness connector.
Disconnect the Driver Cylinder Lock Switch harness connector.
Using a 12-volt Test Light connected to 12-volts, check the Driver Cylinder Lock
Switch MUX circuit.
Does the test light illuminate?
Yes → Repair the Driver Cylinder Lock Switch MUX circuit for a short to
→ Go To 4
No
4 Disconnect the Body Control Module C4 harness connector.
Disconnect the Driver Cylinder Lock Switch harness connector.
Measure the resistance of the Driver Cylinder Lock Switch MUX circuit between the
Driver Cylinder Lock Switch connector and the BCM C4 connector.
Is the resistance below 5.0 ohms?
Yes → Replace the Driver Cylinder Lock Switch in accordance with the
→ Repair the Driver Cylinder Lock Switch MUX circuit for an open.
No
POSSIBLE CAUSES
ACTION
Perform VTSS VERIFICATION TEST - 1A.
open.
Perform VTSS VERIFICATION TEST - 1A.
ground.
Perform VTSS VERIFICATION TEST - 1A.
Service Information.
Perform VTSS VERIFICATION TEST - 1A.
Perform VTSS VERIFICATION TEST - 1A.
524
APPLICABILITY
All
All
All
All