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

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

Conditions for Running the DTC

When the rear compartment lid latch release is actively being requested by the BCM.

Conditions for Setting the DTC

The BCM detects a short to ground in the rear closure relay control circuit.

Action Taken When the DTC Sets

The rear compartment lid latch will malfunction.

Conditions for Clearing the DTC

* This 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 (Connector Views)
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 (Programming and Relearning) for scan tool information

Circuit/System Verification

Ignition ON, command the M40 rear compartment lid latch to UNLATCH with a scan tool. The M40 rear compartment lid latch should release the trunk lid.

Circuit/System Testing

1. Ignition OFF, disconnect the K609 REAR CLOSURE relay.
2. Test for less than 10 ohm between the ground circuit terminal 85 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 86 and the ground circuit terminal 85.
4. Ignition ON, command the M40 rear compartment lid 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 K609 REAR CLOSURE relay.

Component Testing

Relay Test
1. Ignition OFF, disconnect the K609 REAR CLOSURE relay.
2. Test for 60-180 ohms between terminals 85 and 86.

• If not within the specified range, replace the K609 REAR CLOSURE relay.

3. Test for infinite resistance between the following terminals:

* 30 and 86
* 30 and 87
* 30 and 85
* 85 and 87

• If not the specified value, replace the K609 REAR CLOSURE relay.

4. Install a 25A fused jumper wire between relay terminal 85 and 12V. Install a jumper wire between relay terminal 86 and ground. Test for less than 2 ohm between terminals 30 and 87.

• If greater than the specified range, replace the K609 REAR CLOSURE relay.

Repair Instructions

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

* Relay Replacement (Removal and Replacement)
* Control Module References (Programming and Relearning) for BCM replacement, setup and programming