Power Door Locks Inoperative - Deadbolt
Power Door Locks Inoperative - Deadbolt
Diagnostic Instructions
* Perform the Diagnostic System Check - Vehicle (Initial Inspection and Diagnostic Overview) prior to using this diagnostic procedure.
* Review Strategy Based Diagnosis (Initial Inspection and Diagnostic Overview) for an overview of the diagnostic approach.
* Diagnostic Procedure Instructions (Initial Inspection and Diagnostic Overview)provides an overview of each diagnostic category.
Circuit/System Description
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.
Reference Information
Schematic Reference
Door Lock/Indicator Schematics (Door Lock/Indicator Schematics)
Connector End View Reference
Component Connector End Views (Connector Views)
Description and Operation
Power Door Locks Description and Operation (Description and Operation)
Electrical Information Reference
* Circuit Testing (Component Tests and General Diagnostics)
* Connector Repairs (Component Tests and General Diagnostics)
* Testing for Intermittent Conditions and Poor Connections (Component Tests and General Diagnostics)
* Wiring Repairs (Component Tests and General Diagnostics)
Scan Tool Reference
Control Module References (Programming and Relearning)
Circuit/System Testing
Deadbolt System Inoperative All Doors
1. Ignition OFF, disconnect the X 501 inline harness connector.
2. Ignition OFF, scan tool OFF, doors CLOSED, test for less than 5.0 ohms 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. Ignition OFF, scan tool OFF, doors CLOSED, test for less than 5.0 ohms 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 X 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.
Repair Instructions
Perform the Diagnostic Repair Verification (Verification Tests) after completing the diagnostic procedure.
* Door Lock Replacement (Door Lock Replacement)
* Control Module References (Programming and Relearning)for DDM replacement, setup, and programming