Pressing the liftgate release switch closes a contact providing a ground for the liftgate release switch signal circuit. The rear fuse block will detect the voltage drop and command voltage to be supplied to the liftgate latch assembly which releases the liftgate.

Schematic Reference

Release Systems Schematics

Connector End View Reference

Component Connector End Views

Description and Operation

Rear Hatch/Gate Description and Operation

Electrical Information Reference

Scan Tool Reference

Control Module References for scan tool information

1. Ignition ON, observe the scan tool Trunk Release Switch parameter while pressing and releasing the liftgate release switch. The parameter should change between Active and Inactive.

⇒	If the parameter does not change, refer to Liftgate Release Switch Malfunction.

2. Command the Trunk Release Test with a scan tool. The liftgate latch should release the liftgate.

⇒	If the liftgate latch does not release the liftgate, refer to Liftgate Release Malfunction.

Liftgate Release Switch Malfunction

1. Ignition OFF, disconnect the harness connector at the liftgate release switch.
2. Test for less than 20 ohms 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 Trunk Release Switch parameter is Inactive.

⇒	If not the specified value, test the signal circuit terminal 1 for a short to ground. If the circuit tests normal, replace the rear fuse block.

4. Install a 3A fused jumper wire between the signal circuit terminal 1 and ground. Verify the scan tool Trunk Release Switch 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 rear fuse block.

5. If all circuits test normal, test or replace the liftgate release switch.

Liftgate Release Malfunction

1. Ignition OFF, disconnect the harness connector at the liftgate latch assembly.
2. Test for less than 5 ohms between the ground circuit terminal 2 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 1 and ground.
4. Command the Trunk Release Test ON and OFF with a scan tool. The test lamp should turn ON and OFF 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 rear fuse block.

⇒	If the test lamp is always ON, test the control circuit for a short to voltage. If the circuit tests normal, replace the rear fuse block.

5. If all circuits test normal, test or replace the liftgate latch assembly.

Liftgate Latch Assembly

1. Ignition OFF, disconnect the harness connector at the liftgate latch.
2. Install a 20A fused jumper wire between the control terminal 1 and 12 volts. Install a jumper wire between the ground terminal 2 and ground. Verify the liftgate latch activates.

⇒	If the latch does not perform as specified, replace the liftgate latch.

Liftgate Release Switch

1. Ignition OFF, disconnect the harness connector at the liftgate release switch.
2. Test for infinite resistance between the signal terminal 1 and the ground terminal 3 with the switch in the open position.

⇒	If not the specified value, replace the liftgate release switch.

3. Test for less than 2 ohms between the signal terminal 1 and the ground terminal 3 with the switch in the closed position.

⇒	If greater than the specified range, replace the liftgate release switch.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.