B3265

DTC B3265

Diagnostic Instructions

* Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure. Initial Inspection and Diagnostic Overview
* Review Strategy Based Diagnosis for an overview of the diagnostic approach.
* Diagnostic Procedure Instructions provides an overview of each diagnostic category.

DTC Descriptors

DTC B3265 01
- Trunk Release Output Circuit Short to Battery

DTC B3265 06
- Trunk Release Output Circuit Short to Ground or Open

Diagnostic Fault Information






Circuit/System Description

The body control module (BCM) provides a low side drive output that controls the trunk relay. The BCM monitors the voltage level on the trunk release relay control circuit to determine when a failure has occurred. The voltage level on this circuit should be high while the trunk relay is not energized, that is the trunk release feature has not been activated. Voltage will be near 0 volts when the relay is energized. When the BCM receives a trunk release signal from a switch or keyless entry transmitter, it responds by applying ground to the trunk release relay control circuit, which energizes the trunk relay.

Conditions for Running the DTC

Ignition ON.

Conditions for Setting the DTC

The following conditions exist for more than 1 second:

B3265 01

The BCM detects a short to battery in the trunk release relay control circuit when the output is active.

B3265 06

The BCM detects a short to ground or an open in the trunk release relay control circuit when the output is inactive.

Action Taken When the DTC Sets

The BCM disables the trunk release relay control until the next ignition cycle.

Conditions for Clearing the DTC

* The current DTC clears when the malfunction is no longer present.
* The history DTC will clear after 100 consecutive fault-free ignition cycles have occurred.

Diagnostic Aids

DTC B3265 06 will also set anytime the 10-amp trunk fuse is open. Besides a short to ground on the relay coil voltage supply circuit or the relay switch voltage supply circuit, a short to ground on the rear compartment lid release actuator output circuit can cause the fuse to open.

Circuit/System Verification

Command the trunk release with a scan tool. The rear compartment lid release actuator should release the trunk lid.

Circuit/System Testing

1. Ignition OFF, disconnect the TRUNK relay.
2. Ignition ON, verify that a test lamp illuminates between the B+ circuit terminal 85 and ground.

^ If the test lamp does not illuminate, test the B+ circuit for a short to ground or an open/high resistance. If the circuit tests normal and the B+ circuit fuse is open, test the control circuit terminal 87 for a short to ground.

3. Connect a test lamp between the control circuit terminal 86 and the B+ circuit terminal 85.
4. Command the trunk release 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 ON, test the control circuit for a short to ground. If the circuit tests normal, replace the BCM.
^ If the test lamp is always OFF, test the control circuit for a short to voltage or an open/high resistance. If the circuit tests normal, replace the BCM.

5. If all circuits test normal, test or replace the TRUNK relay.

Repair Instructions

Perform the Diagnostic Repair Verification after completing the diagnostic procedure. Verification Tests

* Relay Replacement (Attached to Wire Harness)
* Rear Compartment Lid Latch Replacement for sedan