The driver and front passenger power door lock switches are integral components of the driver door switch (DDS) and passenger door switch (PDS). The switches consist of 2 positions, lock and unlock, and are in the normally open state. When placed in either the lock or unlock positions, the switches provide a direct input to there respective door control module. When a power door lock switch is operated to the lock or unlock position, the associated door control module responds by sending a serial data message indicating a change in the switches position. This serial data message is received by the opposite door control module as well as the body control module (BCM). The DDS and PDS respond to the lock/unlock request by activating their associated power door lock motors to the appropriate direction to lock or unlock the front doors.

Schematic Reference

Door Lock/Indicator Schematics

Connector End View Reference

Component Connector End Views

Description and Operation

Power Door Locks Description and Operation

Electrical Information Reference

Scan Tool Reference

Control Module References for scan tool information

Ignition ON, command the front doors to LOCK and UNLOCK by using the driver and passenger door lock switches, the front doors should perform LOCK and UNLOCK function from each switch.

Driver Door Lock Malfunction

1. Ignition OFF, disconnect the harness connector at the driver door latch.
2. Test for less than 5 ohms between the control circuit terminal 3 and ground.

⇒	If greater than the specified range, test the control circuit for a short to voltage or an open/high resistance. If circuits test normal, replace the DDS.

3. Test for less than 5 ohms between the control circuit terminal 2 and ground.

⇒	If greater than the specified range, test the control circuit for a short to voltage or an open/high resistance. If circuit tests normal, replace the DDS.

4. Ignition ON, connect a test lamp between the control circuit terminal 3 and control circuit terminal 2.
5. Command the door to LOCK and UNLOCK by using the driver door lock switch. The test lamp should briefly illuminate when commanding the LOCK and UNLOCK states.

⇒	If the test lamp does not illuminate during either of the commands, test either control circuit for a short to ground. If the circuits test normal, replace the DDS.

6. If all circuits test normal, test or replace the driver door latch.

Passenger Door Lock Malfunction

1. Ignition OFF, disconnect the harness connector at the passenger door latch.
2. Ignition ON, test for less than 5 ohms between the control circuit terminal 5 and ground.

⇒	If greater than the specified range, test the control circuit for a short to voltage or an open/high resistance. If circuit tests normal, replace the PDS.

3. Test for less than 5 ohms between the control circuit terminal 6 and ground.

⇒	If greater than the specified range, test the control circuit for a short to voltage or an open/high resistance. If circuit tests normal, replace the PDS.

4. Connect a test lamp between the control circuit terminal 5 and control circuit terminal 6.
5. Command the door to LOCK and UNLOCK by using the passenger door lock switch. The test lamp should briefly illuminate when commanding the LOCK and UNLOCK states.

⇒	If the test lamp does not illuminate during either of the commands, test either control circuit for a short to ground. If the circuits test normal, replace the PDS.

6. If all circuits test normal, test or replace the passenger door latch.

1. Ignition OFF, disconnect the harness connector at the appropriate door latch.
2. Install a 15A fused jumper wire between one of the control terminals and 12V. Momentarily install a jumper wire between the other control terminal and ground. Reverse the jumper wires at least two times, the door latch should perform the LOCK/ UNLOCK functions.

⇒	If it does not perform as specified, replace the door latch

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.