Symptom:
*DRIVER DOOR UNLATCH INOPERATIVE
POSSIBLE CAUSES
DTC PRESENT
LATCH MOTOR
DRIVER DOOR UNLATCH DRIVER CIRCUIT OPEN
DRIVER DOOR UNLATCH RETURN CIRCUIT OPEN
BODY CONTROL MODULE - LATCH DRIVER OPEN
TEST ACTION APPLICABILITY
1 With the DRBIIIt, read DTC’s.
Does the DRBIIIt display any Door Lock related trouble codes?
All
Yes → Refer to symptom list for problems related to POWER DOOR
LOCKS/RKE.
Perform BODY VERIFICATION TEST - VER 1.
No → Go To 2
2 Disconnect the Latch Motor connector.
Connect a 12-volt test light between the Driver Door Unlatch Driver circuit and the
Driver Door Unlatch Return circuit.
With the DRBIIIt, actuate the UNLATCH DRIVER DOOR and then actuate
RETURN LATCH.
Did the test light illuminate brightly when the door was actuated?
All
Yes → Replace the Latch Motor.
Perform BODY VERIFICATION TEST - VER 1.
No → Go To 3
3 Disconnect the Body Control Module C2 connector.
Disconnect the Latch Motor connector.
Measure the resistance of the Driver Door Unlatch Driver circuit between the BCM
C2 connector and the Latch Motor connector.
Is the resistance below 5.0 ohms?
All
Yes → Go To 4
No → Repair the Driver Door Unlatch Driver circuit for an open.
Perform BODY VERIFICATION TEST - VER 1.
4 Disconnect the Body Control Module C2 connector.
Disconnect the Latch Motor connector.
Measure the resistance of the Driver Door Unlatch Return circuit between the BCM
C2 connector and the Latch Motor connector.
Is the resistance below 5.0 ohms?
All
Yes → Go To 5
No → Repair the Driver Door Unlatch Return circuit for an open.
Perform BODY VERIFICATION TEST - VER 1.
328
POWER DOOR LOCKS/RKE
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