Chrysler 300M 2002 Service Manual page 2251

VEHICLE THEFT/SECURITY
Symptom:
*PASSENGER DOOR KEY FAILS TO ARM OR DISARM VTSS
FUSED B+ OPEN
PASSENGER CYLINDER LOCK SWITCH MUX CIRCUIT SHORTED TO GROUND
PASSENGER CYLINDER LOCK SWITCH MUX CIRCUIT OPEN
PASSENGER CYLINDER LOCK SWITCH
BCM--VTSS WON'T ARM OR DISARM WITH DOOR KEY
TEST
1 With the DRBIII in Sensors, read the PASS 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 Passenger Cylinder Lock to the lock and unlock positions.
Does the DRBIII display 3.5-4.5 volts in the unlock position and 6.0-7.0 volts in the
lock position
Yes → Replace and program the Body Control Module.
→ Go To 2
No
2 Disconnect the Passenger 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 Fused B+ circuit for an open.
No
3 Disconnect the Body Control Module C4 harness connector.
Disconnect the Passenger Cylinder Lock Switch harness connector.
Using a 12-volt Test Light connected to 12-volts, check the Passenger Cylinder Lock
Switch MUX circuit.
Does the test light illuminate?
Yes → Repair the Passenger Cylinder Lock Switch MUX circuit for a
→ Go To 4
No
4 Disconnect the Body Control Module C4 harness connector.
Disconnect the Passenger Cylinder Lock Switch harness connector.
Measure the resistance of the Passenger Cylinder Lock Switch MUX circuit between
the Passenger Cylinder Lock Switch connector and the BCM C4 connector.
Is the resistance below 5.0 ohms?
Yes → Replace the Passenger Cylinder Lock Switch in accordance with
→ Repair the Passenger Cylinder Lock Switch MUX circuit for an
No
POSSIBLE CAUSES
ACTION
Perform VTSS VERIFICATION TEST - 1A.
Perform VTSS VERIFICATION TEST - 1A.
short to ground.
Perform VTSS VERIFICATION TEST - 1A.
the Service Information.
Perform VTSS VERIFICATION TEST - 1A.
open.
Perform VTSS VERIFICATION TEST - 1A.
528
APPLICABILITY
All
All
All
All