Power Door Locks Inoperative - Deadbolt Export

Export vehicles may be equipped with the deadbolt feature, which includes a reversible deadbolt motor contained within each door latch assembly. Each deadbolt motor is wired to the driver door module (DDM) through 2 circuits; the deadbolt lock control circuit and the deadbolt unlock control circuit. To deadbolt a door, the body control module (BCM) locks the door by momentarily applying voltage to the door latch motor control circuit. The remote control door lock receiver (RCDLR) applies ground to the door latch enable control circuit to complete the circuit to the door latch motor. To complete the deadbolting, the DDM momentarily applies voltage to the deadbolt lock control circuit and ground to the deadbolt unlock control circuit. If the content theft feature is armed at the same time, the interior door lock switches will not operate the locks.

To undeadbolt the door, the DDM reverses the polarity, applying battery voltage to the deadbolt unlock control circuit, and ground to the deadbolt lock control circuit.

Schematic Reference

Door Lock/Indicator Schematics

Connector End View Reference

Electrical Information Reference

Scan Tool Reference

Deadbolt System Inoperative All Doors

1. Ignition OFF, disconnect the C 501 inline harness connector.
2. Test for less than 1.0 ohm of resistance between the control circuit terminal 13 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 DDM.

3. Test for less than 1.0 ohm of resistance between the control circuit terminal 12 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 DDM.

4. Reconnect harness connector C 501.
5. Ignition OFF, disconnect the harness connector at the passenger door latch assembly.
6. Disconnect the harness connector at the driver door latch assembly.
7. Connect a test lamp between control circuit terminal 7 and control circuit terminal 6.
8. Command the Door Deadbolt Lock/Unlock to LOCK and UNLOCK with a scan tool. The test lamp should turn ON when commanding the LOCK and UNLOCK states.

⇒	If the test lamp remains OFF during either of the commands, test for a short to ground or an open/high resistance on either control circuit. If the circuits test normal, replace the DDM.

⇒	If the test lamp remains ON at all times, test for a short to voltage on either control circuit. If the circuits test normal, replace the DDM.

9. Connect a test lamp between control circuit terminal 2 and control circuit terminal 1.
10. Command the Door Deadbolt Lock/Unlock to LOCK and UNLOCK with a scan tool. The test lamp should turn ON when commanding the LOCK and UNLOCK states.

⇒	If the test lamp remains OFF during either of the commands, test for a short to ground or an open/high resistance on either control circuit. If the circuits test normal, replace the DDM.

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

Deadbolt System Inoperative One Door

1. Ignition OFF, disconnect the harness connector at the inoperative door latch assembly.
2. Connect a test lamp between deadbolt unlock control circuit and deadbolt lock control circuit.
3. Command the Door Deadbolt Lock/Unlock to LOCK and UNLOCK with a scan tool. The test lamp should turn ON when commanding the LOCK and UNLOCK states.

⇒	If the test lamp remains OFF during either of the commands, test for a short to ground or an open/high resistance on either control circuit.

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

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.