B3265

DTC B3265

Diagnostic Instructions

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

The ignition is 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.



Reference Information
Schematic Reference

Release Systems Schematics (Release Systems Schematics)
Connector End View Reference

Component Connector End Views (Connector Views)
Electrical Information Reference

* Circuit Testing (Component Tests and General Diagnostics)
* Connector Repairs (Component Tests and General Diagnostics)
* Testing for Intermittent Conditions and Poor Connections (Component Tests and General Diagnostics)
* Wiring Repairs (Component Tests and General Diagnostics)

Scan Tool Reference

Control Module References (Programming and Relearning)for Scan Tool Information


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

Ignition ON, press and hold the rear compartment touch pad. The trunk lid should release.


Circuit/System Testing

1. Ignition OFF, disconnect the trunk relay from the rear fuse block.
2. Connect a test lamp between the relay coil control circuit and the relay coil voltage supply circuit.
3. Press the liftgate touch pad switch. The test lamp should momentarily turn ON each time the solenoid is commanded ON.

• If the test lamp remains ON all the time, test for a short to ground on the relay coil control circuit. If the circuit tests normal, replace the BCM.


• If the test lamp remains OFF all the time, test for a short to voltage or an open/high resistance on the relay coil control circuit. If the circuit tests normal, replace the BCM.

4. If all circuits/connections test normal, replace the trunk relay.



Repair Instructions

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

* Relay Replacement (Attached to Wire Harness) (Relay Replacement (Attached to Wire Harness))Relay Replacement (Within an Electrical Center) (Relay Replacement (Within an Electrical Center))
* Rear Compartment Lid Latch Replacement (Service and Repair)for sedan
* Control Module References (Programming and Relearning)for BCM replacement, setup, and programming