Volt

DTC B3265

The body control module (BCM) applies battery positive voltage to the tailgate release relay control circuit, which energises the coil side of the tailgate release relay. The switch side of the tailgate release relay then closes, supplying battery positive voltage through the relay and the relay controlled output circuit to the rear closure latch. The rear closure latch then releases the rear hatch so that it may be manually raised to an open position.

When the rear closure latch is actively being requested by the BCM.

The BCM detects a short to ground in the tailgate release relay control circuit.

The rear closure latch will malfunction.

Schematic Reference

Release Systems Schematics : Tailgate Schematics → Release System 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

Vehicle in Service Mode, command the rear closure latch to UNLATCH with a scan tool. The rear closure latch should release the rear hatch.

1. Vehicle OFF, disconnect the KR95A tailgate release relay.
2. Test for less than 10 Ω between the ground circuit terminal 48 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 44 and the ground circuit terminal 48.
4. Vehicle in Service Mode, command the rear closure latch to UNLATCH with a scan tool, the test lamp should turn ON while commanding the UNLATCH state.

⇒	If the test lamp is always ON, test the control circuit for a short to voltage. If the circuit tests normal, replace the K9 BCM.

⇒	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. If all circuits test normal, test or replace the KR95A tailgate release relay.

1. Vehicle OFF, disconnect the KR95A tailgate release relay.
2. Test for 60-200 Ω between terminals 85 and 86.

⇒	If not within the specified range, replace the KR95A tailgate release relay.

3. Test for infinite resistance between the following terminals:

•

30 and 86

•

30 and 87

•

30 and 85

•

85 and 87

⇒	If less than the specified value, replace the KR95A tailgate release relay.

4. Install a 3A fused jumper wire between relay terminal 85 and 12 V. Install a jumper wire between relay terminal 86 and ground. Test for less than 2 Ω between terminals 30 and 87.

⇒	If greater than the specified range, replace the KR95A tailgate release relay.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.