Front Doors

The driver door lock switch is wired to the driver door switch assembly (DDSA). The lock switch receives a constant ground source. There are 2 signal circuits, one for lock signal, and one for unlock signal. When the switch is activated for a lock or unlock function, the normally open switch contacts for that function are closed and provide a switched ground signal to the DDSA. These switch activations are detected and processed by the DDSA and then communicated to the driver door module (DDM) via a serial data message.

The front passenger door lock switch is wired to the passenger front door module (PDM). The lock switch receives a constant ground source. There are 2 signal circuits, one for lock signal, and one for unlock signal. When the switch is activated for a lock or unlock function, the normally open switch contacts for that function are closed and provide a switched ground signal to the PDM.

The front doors do not have traditional door lock actuators. They have electronically controlled door latches that will operate depending on the status of the door lock system. This status is determined by the front door modules and the last known state of the lock system. If the last known state is LOCK, the latches will not release when the door handles are operated. If the last known state is UNLOCK, the latches will release when the door handles are operated. The front doors are also equipped with red door lock status indicators. The front door modules will supply power and ground to the indicators to illuminate them when the lock system is in a virtual state of lock. The indicators will not continuously illuminate when the vehicle is locked. They will illuminate for approximately 5 seconds after a lock switch activation or after a door handle has been operated and the front door modules are in a virtual state of lock.

Rear Doors

Each rear door lock actuator is powered and controlled by the right rear door module (RRDM) and left rear door module (LRDM) mounted in the individual door. The remote control door lock receiver (RCDLR), which is the master control for the door lock system, determines when the lock and unlock functions are permitted. The RCDLR receives and examines lock and unlock function requests from the individual door modules via serial data, or from RFA transmissions. The RCDLR also examines the transmission shift selector position and power mode information available over the serial data circuits. If the RCDLR determines that all conditions are correct for a lock or unlock function, a message is sent via serial data back to the individual door modules commanding them to perform the lock or unlock function requested.

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.

1. Ignition ON, observe the scan tool Driver Door Handle Switch parameter while using the exterior driver door handle. The parameter should change from Idle to Lock, and Unlock.

⇒	If the value does not change between the commanded states, refer to Driver Door Lock Switch Malfunction.

2. Observe the scan tool Door Lock Switch parameter located in the passenger door module data display menu while using the passenger door lock switch. The parameter should change from Idle to Lock, and Unlock.

⇒	If the value does not change between the commanded states, refer to Passenger Door Lock Switch Malfunction.

3. Command the doors to LOCK and UNLOCK with a scan tool. The left rear and right rear doors should LOCK and UNLOCK when changing between the commanded states.

⇒	If either rear door does not LOCK/UNLOCK refer to Rear Door Lock Malfunction.

Driver Door Lock Switch Malfunction

1. Ignition OFF, disconnect the harness connector at the appropriate driver door lock switch.
2. Test for less than 10 ohms between the ground circuit terminal C and ground.

⇒	If greater than the specified range, test the ground circuit for an open/high resistance.

3. Ignition ON, verify the scan tool Door Lock Switch parameter is Idle.

⇒	If not the specified value, test the signal circuit terminals listed below for a short to ground. If the circuit tests normal, replace the driver window switch.

•	Signal circuit terminal D

•	Signal circuit terminal E

4. Install a 3A fused jumper wire between the signal circuit terminal D and ground. Verify the scan tool door lock switch parameter is Lock.

⇒	If not the specified value, test the signal circuit for a short to voltage or an open/high resistance. If the circuit tests normal, replace the driver window switch.

5. Install a 3A fused jumper wire between the signal circuit terminal E and ground. Verify the scan tool door lock switch parameter is Unlock.

⇒	If not the specified value, test the signal circuit for a short to voltage or an open/high resistance. If the circuit tests normal, replace the driver window switch.

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

Passenger Door Lock Switch Malfunction

1. Ignition OFF, disconnect the harness connector at the passenger door lock switch.
2. Test for less than 10 ohms between the ground circuit terminal C and ground.

⇒	If greater than the specified range, test the ground circuit for an open/high resistance.

3. Ignition ON, verify the scan tool Door Lock Switch parameter is Idle.

⇒	If not the specified value, test the signal circuit terminals listed below for a short to ground. If the circuit tests normal, replace the passenger door module.

•	Signal circuit terminal D

•	Signal circuit terminal E

4. Install a 3A fused jumper wire between the signal circuit terminal D and ground. Verify the scan tool door lock switch parameter is Lock.

⇒	If not the specified value, test the signal circuit for a short to voltage or an open/high resistance. If the circuit tests normal, replace the passenger door module.

5. Install a 3A fused jumper wire between the signal circuit terminal E and ground. Verify the scan tool door lock switch parameter is Unlock.

⇒	If not the specified value, test the signal circuit for a short to voltage or an open/high resistance. If the circuit tests normal, replace the passenger door module.

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

Rear Power Door Latch Malfunction

1. Ignition OFF, disconnect the harness connector at the appropriate rear door latch assembly.
2. Test for less than 5 ohms between the control circuit terminals listed below and ground.

•	Control circuit terminal 2

•	Control circuit terminal 3

•	Control circuit terminal 5

•	Control circuit terminal 6

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

3. Connect a test lamp between the control circuit terminals listed below.

•	Control circuit terminal 2 and control circuit terminal 3

•	Control circuit terminal 5 and control circuit terminal 6

4. Command the doors to LOCK/UNLOCK with a scan tool. The test lamp should briefly illuminate when changing between the commanded states.

⇒	If the test lamp is always OFF during either of the commands, test either control circuit for a short to ground. If the circuits test normal, replace the door control module.

5. If all circuits test normal, test or replace the door latch assembly.

Power Door Lock Deadbolt Malfunction (European)

1. Ignition OFF, disconnect the harness connector at the appropriate rear door latch assembly.
2. Test for less than 5 ohms between the control circuit terminals listed below and ground:

•	Control circuit terminal 2

•	Control circuit terminal 1

•	Control circuit terminal 5

•	Control circuit terminal 4

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

3. Connect a test lamp between the control circuit terminals listed below.

•	Control circuit terminal 2 and control circuit terminal 1

•	Control circuit terminal 5 and control circuit terminal 4

4. Command the door deadbolts LOCK/UNLOCK with a scan tool. The test lamp should briefly illuminate when changing between the commanded states.

⇒	If the test lamp is always OFF during either of the commands, test either control circuit for a short to ground. If the circuits test normal, replace the door control module.

5. If all circuits test normal, test or replace the door latch assembly.

Door Latch Assembly Test

1. Ignition OFF, disconnect the harness connector at the appropriate door latch assembly.
2. Ignition ON, install a 15 amp fused jumper wire between the control terminal listed below and 12 volts.

•	Control terminal 1

•	Control terminal 4

•	Control terminal 6

•	Control terminal 8

3. Momentarily install a jumper wire between the control terminal listed below and ground. The door latch assembly should perform the LOCK/ UNLOCK function

•	Control terminal 2

•	Control terminal 3

•	Control terminal 7

•	Control terminal 9

⇒	If the function does not perform as specified, replace the door latch assembly.

4. Reverse the jumper wires; the door latch assembly should perform the UNLOCK/LOCK function.

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

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.