Vauxhall Workshop Service and Repair Manuals

Boot/Tailgate Release Malfunction

Diagnostic Instructions

Diagnostic Fault Information

Circuit/System Description

The exterior rear compartment lid release switch receives a signal from the body control module (BCM). When the exterior rear compartment lid release switch is activated the signal circuit is pulled to ground. The BCM applies battery positive voltage to the tailgate release relay control circuit which energises the relay. The tailgate release relay is grounded at all times. With the relay coil energised, the relay switch contacts close allowing battery voltage to flow to the rear compartment lid release actuator causing the rear compartment lid to release.

Reference Information

Schematic Reference

Release Systems Schematics

Connector End View Reference

Component Connector End Views

Description and Operation

Luggage Compartment Description and Operation

Electrical Information Reference

Scan Tool Reference

Control Module References for scan tool information

Circuit/System Verification

Command the boot release by using the exterior rear compartment lid release switch. The rear compartment lid release actuator should release the boot lid.

Circuit/System Testing

1. Ignition OFF, disconnect the harness connector at the S46 Tailgate Handle Switch.
2. Test for less than 10 Ω between the ground circuit terminal 3 and ground.

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

3. Ignition ON, verify the scan tool Rear Body Closure Unlatch Command parameter is Inactive.

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

4. Install a 3 A fused jumper wire between the signal circuit terminal 1 and ground. Verify the scan tool Rear Body Closure Unlatch Command parameter is Active.

⇒	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 K9 Body Control Module.

5. Connect the harness connector at the S46 Tailgate Handle Switch. Observe the scan tool Rear Body Closure Unlatch Command parameter while pressing and releasing the exterior rear compartment lid release switch. The parameter should change between Active and Inactive.

⇒	If not the specified value, test or replace the S46 Tailgate Handle Switch.

6. Ignition OFF, disconnect the harness connectors at the X50A Fuse Block - Underbonnet.
7. Test for less than 5 Ω between the ground circuit terminal 48 X1 and ground.

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

8. Connect a test lamp between the control circuit terminal 27 X2 and ground. Verify the test lamp does not illuminate.

⇒	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.

9. Command the Rear Body Closure Unlatch with a scan tool. Verify the test lamp illuminates briefly.

⇒	If the test lamp does not illuminate, test the control circuit for a short to ground or an open/high resistance. If the circuits test normal, replace the K9 Body Control Module.

10. Ignition ON, test for less than 0.3 V between the B+ circuit terminal 15 X2 and ground.

⇒	If greater than the specified value, test the B+ circuit for a short to voltage.

11. Ignition OFF, test for infinite resistance between the B+ circuit terminal 15 X2 and ground.

⇒	If less than the specified value, test the B+ circuit for a short to ground.

12. Test for less than 5 Ω between the B+ circuit terminals 15 X2 and 75 X2.

⇒	If greater than the specified value, test the B+ circuit for an open/high resistance.

13. Connect the harness connectors at the X50A Fuse Block - Underbonnet and disconnect the harness connector at the M30 Tailgate Latch.
14. Test for less than 5 Ω between the ground circuit terminal 1 and ground.

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

15. Connect a test lamp between the control circuit terminal 3 and ground. Verify the test lamp does not illuminate.

⇒	If the test lamp illuminates, test the control circuit for a short to voltage. If the circuit tests normal, replace the X50A Fuse Block - Underbonnet.

16. Command the Rear Body Closure Unlatch with a scan tool. Verify the test lamp illuminates briefly.

⇒	If the test lamp does not illuminate, test the control circuit for a short to ground or an open/high resistance. If the circuits test normal, replace the X50A Fuse Block - Underbonnet.

17. If all circuits test normal, test or replace the M30 Tailgate Latch.

Component Testing

Rear Compartment Lid Latch Test

1. Ignition OFF, disconnect the harness connector at the M30 Tailgate Latch.
2. Install a 15 A fused jumper wire between the control terminal 3 and B+. Momentarily install a jumper wire between the ground terminal 1 and ground. Verify the M30 Tailgate Latch activates.

⇒	If the actuator does not perform as specified, replace the M30 Tailgate Latch.

Rear Compartment Lid Unlatch Switch Test

1. Ignition OFF, disconnect the harness connector at the S46 Tailgate Handle Switch.
2. Test for infinite resistance between the signal terminal 1 and the ground terminal 3 with the switch in the released position.

⇒	If not the specified value, replace the S46 Tailgate Handle Switch.

3. Test for less than 5 Ω between the signal terminal 1 and the ground terminal 3 with the switch in the pressed position.

⇒	If greater than the specified range, replace the S46 Tailgate Handle Switch.

Repair Instructions

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.