B2495

DTC B2495

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 Descriptors

DTC B2495 01

-
Endgate/Liftgate Latch Control Circuit Short to Battery

DTC B2495 02

-
Endgate/Liftgate Latch Control Circuit Short to Ground

Diagnostic Fault Information






Circuit/System Description

Pressing the liftgate switch closes a contact providing a ground for the rear closure handle switch open signal circuit. The body control module (BCM) will detect the voltage drop and command voltage to be supplied to the liftgate latch relay supply voltage circuit thus energizing the liftgate relay which provides voltage to the liftgate latch releasing the liftgate.

Conditions for Running the DTC

Battery voltage must be between 9-16 V.

Conditions for Setting the DTC

B2495 01

When the BCM detects a short to voltage on the liftgate relay control circuit.

B2495 02

When the BCM detects a short to ground on the liftgate relay control circuit.

Action Taken When the DTC Sets

The liftgate will be inoperative.

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 1-2 Shift Solenoid (SS) Valve (MN5)

Description and Operation

Rear Hatch/Gate Description and Operation Rear Hatch/Gate

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

Doors unlocked, command the liftgate release by pressing the liftgate release switch. The liftgate latch assembly should release the liftgate.

Circuit/System Testing

1. Ignition OFF, disconnect the X2 harness connector at the X51A fuse block-instrument panel.

2. Connect a test lamp between the control circuit terminal 53 and ground.

3. Command the Rear Body Closure to Unlatch with a scan tool. The test lamp should illuminate during the unlatch command.

• 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.

4. Connect a test lamp between the control circuit terminal 39 and B+.

5. Command the Rear Body Closure to Unlatch with a scan tool. The test lamp should illuminate during the unlatch command.

• 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 K9 BCM.

6. If all circuits test normal, replace the X51A fuse block-instrument panel.

Repair Instructions

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

* Instrument Panel Wiring Harness Junction Block Replacement Instrument Panel Wiring Harness Junction Block Replacement

* Control Module References Programming and Relearning for BCM replacement, programming and setup