Cruze

Power Door Locks Malfunction - Dead Lock

Door latch assemblies each contain a reversible dead lock motor, each dead lock motor is controlled by 2 circuits; the dead lock control circuit and the dead lock unlock control circuit. To dead lock a door, the body control module (BCM) locks the door by momentarily energising the door lock security relay. To complete the dead locking, the BCM momentarily applies voltage to the dead lock control circuit and ground to the door lock relay control circuit and the door latches will then dead lock.

To undead lock the door, the BCM uses the same circuit as the normal door unlocking system and the dead locks will unlatch with the rest of the door locks.

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. Command the doors to LOCK and UNLOCK by pressing the appropriate central door lock switch. The doors should perform the LOCK and UNLOCK functions. If a door does not LOCK or UNLOCK, refer to Symptoms - Vehicle Access .
2. Command the doors to LOCK and manually unlock each door, attempt to open the door by using the exterior door handles. The exterior door handles should be inoperative.

⇒	If one or more doors open but not all, refer to Single Door Dead Lock Malfunction.

⇒	If all doors open, refer to All Door Dead Lock Malfunction.

3. Command the doors to UNLOCK and attempt to open the door by using the exterior door handles. The exterior door handles should open the doors.

⇒	If one or more doors open but not all, refer to Single Door Dead Lock Malfunction.

⇒	If all doors do not open, refer to All Door Dead Lock Malfunction.

Single Door Dead Lock Malfunction

Note: The dead lock diagnostic assumes the door latches function normally.

1. Ignition OFF, disconnect the wiring harness plug at the appropriate A23 door latch assembly.
2. Connect a test lamp between control circuit terminals listed below:

•	A23D door latch assembly - driver control terminal 1 and control terminal 2 (Right Hand Drive)

•	A23D door latch assembly - driver control terminal 6 and control terminal 7 (Left Hand Drive)

•	A23P door latch assembly - passenger control terminal 6 and control terminal 7 (Right Hand Drive)

•	A23P door latch assembly - passenger control terminal 1 and control terminal 2 (Left Hand Drive)

•	A23LR door latch assembly - left rear control terminal 1 and control terminal 2

•	A23RR door latch assembly - right rear control terminal 6 and control terminal 7

3. Command the door dead locks to LOCK and UNLOCK with a scan tool, the test lamp should briefly illuminate while commanding the LOCK and UNLOCK states.

⇒	If the test lamp is always OFF, test either control circuit for an open/high resistance between the connector and the circuit splice.

4. If all circuits test normal, test or replace the A23 door latch assembly.

All Door Dead Lock Malfunction

Note: The dead lock diagnostic assumes the door latches function normally.

1. Ignition OFF, disconnect the KR97 door lock relay.
2. Test for less than 10 Ω between the ground circuit terminal 86 and ground.

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

3. Connect a test lamp between the control circuit terminal 85 and ground.
4. Ignition ON, command the door dead locks to LOCK and UNLOCK with a scan tool, the test lamp should briefly illuminate when changing between the commanded states.

⇒	If the test lamp is always OFF, test the control circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the K9 BCM

5. Verify that a test lamp does not illuminate between the control circuit terminal 87 and ground.

⇒	If the test lamp illuminates, test the control circuit for a short to voltage.

6. If all circuits test normal, replace the KR97 door lock relay.

Door Catch

1. Ignition OFF, disconnect the wiring harness plug at the appropriate A23 door latch assembly.
2. Install a 25 A fused jumper wire between one of the control terminals and 12 V. Momentarily install a jumper wire between the other control terminal and ground. Reverse the jumper wires at least two times, the A23 door latch assembly should perform the LOCK and UNLOCK functions.

⇒	If it does not perform as specified, replace the A23 door latch assembly.

Perform the Diagnostic Repair Verification