B3265

DTC B3265

Diagnostic Instructions

* Perform the Diagnostic System Check - Vehicle Diagnostic System Check - Vehicle prior to using this diagnostic procedure.

* Review Strategy Based Diagnosis Strategy Based Diagnosis for an overview of the diagnostic approach.

* Diagnostic Procedure Instructions Diagnostic Procedure Instructions provides an overview of each diagnostic category.

DTC Descriptor

DTC B3265 02
- Trunk Lid Unlatch Output Circuit Short to Ground

Diagnostic Fault Information






Circuit/System Description

When the rear compartment lid release switch is pressed, the rear compartment lid release signal circuit to the Body Control Module is grounded. When the rear compartment lid release signal circuit is grounded, the Body Control Module grounds the coil side of the trunk release relay through the trunk release relay control circuit. With ground applied to the coil side of the trunk release relay, voltage is applied to the rear compartment lid release actuator, opening the rear compartment.

Conditions for Running the DTC

Battery voltage must be between 9-16 V.

Conditions for Setting the DTC

The Body Control Module detects a short to ground in the compartment lid release relay control circuit.

Action Taken When the DTC Sets

The rear compartment lid latch will malfunction.

Conditions for Clearing the DTC

* The DTC will be current for as long as the fault is present.

* When the fault is no longer present, the DTC will be a history DTC.

* A history DTC will clear after 50 ignition cycles

Reference Information

Schematic Reference

Release Systems Schematics Release Systems Schematics

Connector End View Reference

Component Connector End Views Sunshade - Left

Description and Operation

Luggage Compartment Description and Operation Description and Operation

Electrical Information Reference

* Circuit Testing Circuit Testing

* Connector Repairs Connector Repairs

* Testing for Intermittent Conditions and Poor Connections Testing for Intermittent Conditions and Poor Connections

* Wiring Repairs Wiring Repairs

Scan Tool Reference

Control Module References Control Module References for scan tool information

Circuit/System Verification

1. Ignition ON.

2. Verify the operation of the M40 Rear Compartment Lid Latch when commanding the Trunk Lid Unlatch with a scan tool.

• If the M40 Rear Compartment Lid Latch does not UNLATCH
Refer to Circuit/System Testing.

• If the M40 Rear Compartment Lid Latch does UNLATCH

3. All OK.

Circuit/System Testing

1. Ignition OFF and all vehicle systems OFF, disconnect the X1 harness connector at the X50A Fuse Block-Underhood. It may take up to 2 minutes for all vehicle systems to power down.

2. Test for less than 10 ohms between the ground circuit terminal 71 and ground.

• If 10 ohms or greater

1. Ignition OFF.

2. Test for less than 2 ohms in the ground circuit end to end.

• If 2 ohms or greater, repair the open/high resistance in the circuit.

• If less than 2 ohms, repair the open/high resistance in the ground connection.

• If less than 10 ohms

3. Ignition OFF, connect the X1 harness connector at the X50A Fuse Block-Underhood. Disconnect the X5 harness connector at the K9 Body Control Module, ignition ON.

4. Verify the M40 Rear Compartment Lid Latch is not activated.

• If the M40 Rear Compartment Lid Latch is activated

1. Ignition OFF, disconnect the X2 harness connector at the X50A Fuse Block-Underhood.

2. Test for less than 1 V between the K9 Body Control Module control circuit terminal 11 X5 and ground.

• If 1 V or greater, repair the short to voltage on the circuit.

• If less than 1 V, replace the X50A Fuse Block-Underhood.

• If the M40 Rear Compartment Lid Latch is not activated

5. Connect a 3A fused jumper wire between the control circuit terminal 11 and B+.

6. Verify the M40 Rear Compartment Lid Latch activates.

• If the M40 Rear Compartment Lid Latch does not activate

1. Ignition OFF, remove the jumper wire, disconnect the X2 harness connector at the X50A Fuse Block-Underhood, ignition ON.

2. Test for infinite resistance between the K9 Body Control Module control circuit terminal 11 X5 and ground.

• If less than Infinite resistance, repair the short to ground on the circuit.

• If infinite resistance

3. Test for less than 2 ohms in the control circuit end to end.

• If 2 ohms or greater, repair the open/high resistance in the circuit.

• If less than 2 ohms, replace the X50A Fuse Block-Underhood.

• If the M40 Rear Compartment Lid Latch activates

7. Replace the K9 Body Control Module.

Repair Instructions

Perform the Diagnostic Repair Verification Verification Tests after completing the repair.

* Underhood Electrical Center or Junction Block Replacement Underhood Electrical Center or Junction Block Replacement

* Control Module References Control Module References for Body Control Module replacement, programming and setup