Vauxhall Workshop Service and Repair Manuals

Power Door Locks Malfunction

Diagnostic Instructions

Diagnostic Fault Information

Circuit/System Description

The body control module (BCM) controls the door lock, passenger door unlock and driver door unlock circuits. Voltage is applied to the appropriate circuit when the BCM senses a door lock/unlock switch activation or a keyless entry lock or unlock command.

Reference Information

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

Circuit/System Verification

1. Ignition ON, observe the BCM scan tool All Doors Lock Command and Driver Door Unlock Command parameters while using the door lock switch. The parameter should change between Inactive and Active.

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

2. Command the All Doors Lock, Driver Door Unlock and Passenger Door(s) Unlock with the scan tool, the doors should lock and unlock.

⇒	If the driver door does not lock or unlock, refer to Driver Door Lock/Unlock Circuit Malfunction.

⇒	If one or more passenger doors do not lock or unlock, refer to Passenger Door Lock/Unlock Circuit Malfunction.

3. Command the Door Deadlock to Lock and Unlock with a scan tool. Listen or feel for the operation of the door deadlock actuators locking and unlocking.

⇒	If one or more doors do not unlock, refer to Door Deadlock Circuit Malfunction.

Circuit/System Testing

Door Lock Switch Malfunction

1. Ignition OFF, disconnect the harness connector at the S26 Hazard Lamps Switch.
2. Test for less than 5 Ω between the ground circuit terminal 7 and ground.

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

3. Ignition ON, verify the scan tool All Doors Lock Command parameter is Inactive.

⇒	If not the specified parameter, test the signal circuit terminal 11 for a short to ground. If the circuit tests normal, replace the K9 Body Control Module.

4. Verify the scan tool Driver Door Unlock Command parameter is Inactive.

⇒	If not the specified parameter, test the signal circuit terminal 9 for a short to ground. If the circuit tests normal, replace the K9 Body Control Module.

5. Install a 3 A fused jumper wire between the signal circuit terminal 9 and ground. Verify the scan tool Driver Door Unlock Command parameter is Active.

⇒	If not the specified parameter, test the signal circuit for a short to voltage or an open/high resistance. If the circuit tests normal, replace the K9 Body Control Module.

6. Install a 3 A fused jumper wire between the signal circuit terminal 11 and ground. Verify the scan tool All Doors Lock Command parameter is Active.

⇒	If not the specified parameter, test the signal circuit for a short to voltage or an open/high resistance. If the circuit tests normal, replace the K9 Body Control Module.

7. If all circuits test normal, test or replace the S26 Hazard Lamps Switch.

Driver Door Lock/Unlock Circuit Malfunction

1. Ignition OFF, disconnect the KR97 Door Lock Relay.
2. Ignition ON, connect a test lamp between the control circuit terminal 86 and ground. Verify the test lamp does not illuminate.

⇒	If the test lamp illuminates, test the signal circuit for a short to voltage. If the circuits test normal, replace the X53A Fuse Block - Rear Body or the K9 Body Control Module.

3. Test for 7-10 V between the control circuit terminal 30 and ground.

⇒	If less than the specified range, test the control circuit for an open/high resistance. If the circuits test normal, replace the X53A Fuse Block - Rear Body or the K9 Body Control Module.

⇒	If greater than the specified range, test the control circuit for a short to voltage. If the circuits test normal, replace the X53A Fuse Block - Rear Body or the K9 Body Control Module.

4. Ignition OFF, disconnect the A23D Door Latch Assembly - Driver.
5. Ignition ON, verify that the test lamp does not illuminate between the driver door control circuit listed below and ground.

•	Left hand drive A23D Door Latch Assembly - Driver terminals 1 and 2

•	Right hand drive A23D Door Latch Assembly - Driver terminals 6 and 7

⇒	If the test lamp illuminates, test the control circuit for a short to voltage. If the circuit tests normal, replace the K9 Body Control Module or the X53A Fuse Block - Rear Body.

6. Install a 3 A fused jumper wire between the control circuit terminals 30 and 87A at the KR97 Door Lock Relay.
7. Test for 7-10 V between the control circuit terminal listed below and ground.

•	Left hand drive A23D Door Latch Assembly - Driver terminal 3

•	Right hand drive A23D Door Latch Assembly - Driver terminal 8

⇒	If less than the specified range, test the control circuit for a short to ground or an open/high resistance. If the circuits test normal, replace the X53A Fuse Block - Rear Body.

⇒	If greater than the specified range, test the control circuit for a short to voltage. If the circuits test normal, replace the X53A Fuse Block - Rear Body.

8. Ignition OFF, test for less than 5 Ω between the driver door unlock and lock control circuit terminals listed below.

•	Left hand drive A23D Door Latch Assembly - Driver terminals 2 and 3

•	Right hand drive A23D Door Latch Assembly - Driver terminal 7 and 8

⇒	If greater than the specified range, test the driver door unlock and lock circuits for an open/high resistance. If both circuits test normal, replace the K9 Body Control Module.

9. Remove the jumper wire and connect the KR97 Door Lock Relay.
10. Test for less than 5 Ω between the driver door unlock and lock control circuit terminals listed below.

•	Left hand drive A23D Door Latch Assembly - Driver terminals 2 and 3

•	Right hand drive A23D Door Latch Assembly - Driver terminal 7 and 8

⇒	If greater than the specified range, replace the KR97 Door Lock Relay.

11. If all circuits test normal, test or replace the A23D Door Latch Assembly - Driver.

Passenger Door Lock/Unlock Circuit Malfunction

1. Ignition OFF, disconnect the inoperative door latch.
2. Ignition ON, verify that the test lamp does not illuminate between the passenger door control circuit listed below and ground:

•	Left hand drive A23P Door Latch Assembly - Passenger terminal 6, 7 and 8

•	Right hand drive A23P Door Latch Assembly - Passenger terminal 1, 2 and 3

•	A23LR Door Latch Assembly - Left Rear terminal 1 , 2 and 3

•	A23RR Door Latch Assembly - Right Rear terminal 6, 7, and 8

⇒	If the test lamp illuminates, test the control circuit for a short to voltage. If the circuit tests normal, replace the K9 Body Control Module.

3. Ignition OFF, test for less than 5 Ω between the door unlock and lock control circuit terminals listed below:

•	Left hand drive A23P Door Latch Assembly - Passenger terminal 7 and 8

•	Right hand drive A23P Door Latch Assembly - Passenger terminal 2 and 3

•	A23LR Door Latch Assembly - Left Rear terminal 2 and 3

•	A23RR Door Latch Assembly - Right Rear terminal 7 and 8

⇒	If greater than the specified range, test the passenger door unlock and lock circuits for an open/high resistance. If both circuits test normal, replace the K9 Body Control Module.

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

Door Deadlock Circuit Malfunction

1. Ignition OFF, disconnect the KR97 Door Lock Relay.
2. Test for less than 5 Ω between the ground circuit terminal 85 and ground.

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

3. Connect a test lamp between the signal circuit terminal 86 and ground.
4. Command the power door locks to lock and unlock using the power door lock switch. The test lamp should illuminate briefly.

⇒	If the test lamp does not illuminate, test the signal circuit for an short to ground or an open/high resistance. If the circuits test normal, replace the X53A Fuse Block - Rear Body or the K9 Body Control Module.

5. Disconnect the inoperative door latch.
6. Install a 3 A fused jumper wire between the control circuit terminals 30 and 87 at the KR97 Door Lock Relay.
7. Test for 7-10 V between the control circuit terminals listed below and ground:

•	Left hand drive A23D Door Latch Assembly - Driver terminal 1

•	Right hand drive A23D Door Latch Assembly - Driver terminal 6

•	Left hand drive A23P Door Latch Assembly - Passenger terminal 6

•	Right hand drive A23P Door Latch Assembly - Passenger terminal 1

•	A23LR Door Latch Assembly - Left Rear terminal 1

•	A23RR Door Latch Assembly - Right Rear terminal 6

⇒	If less than the specified range, test the control circuit for a short to ground or an open/high resistance. If the circuits test normal, replace the X53A Fuse Block - Rear Body.

⇒	If greater than the specified range, test the control circuit for a short to voltage. If the circuits test normal, replace the X53A Fuse Block - Rear Body.

8. Remove the jumper wire and connect the KR97 Door Lock Relay.
9. Connect a test lamp between the control circuits listed below:

•	Left hand drive A23D Door Latch Assembly - Driver terminals 1 and 2

•	Right hand drive A23D Door Latch Assembly - Driver terminals 6 and 7

•	Left hand drive A23P Door Latch Assembly - Passenger terminals 6 and 7

•	Right hand drive A23P Door Latch Assembly - Passenger terminals 1 and 2

•	A23LR Door Latch Assembly - Left Rear terminal 1 and 2

•	A23RR Door Latch Assembly - Right Rear terminal 6 and 7

10. Command the Door Deadlock to Lock and Unlock with a scan tool. Verify the test lamp illuminates briefly when changing between the commanded states.

⇒	If the test lamp does not illuminate, replace the KR97 Door Lock Relay.

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

Component Testing

Door Lock Switch Test

1. Ignition OFF, disconnect the harness connector at the S26 Hazard Lamps Switch.
2. Test for infinite resistance between the signal terminals 9 and 11 and the ground terminal 7 with the switch in the released position.

⇒	If less than the specified value, replace the S26 Hazard Lamps Switch.

3. Test for less than 5 Ω between the signal terminal 11 and the ground terminal 7 with the lock switch in the pressed position.

⇒	If greater than the specified range, replace the S26 Hazard Lamps Switch.

4. Test for less than 5 Ω between the signal terminal 9 and the ground terminal 7 with the unlock switch in the pressed position.

⇒	If greater than the specified range, replace the S26 Hazard Lamps Switch.

Door Catch Assembly Test

1. Ignition OFF, disconnect the harness connector at the appropriate door lock assembly.
2. Install a 25 A fused jumper wire between the lock control terminal and B+. Momentarily install a jumper wire between the unlock control terminal and ground. The door lock should perform the lock/unlock function.

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

3. Reverse the jumper wires; the appropriate door lock should perform the unlock/lock function.

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

Repair Instructions

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.