Diagnostic Instructions
| • | Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure. |
| • | Review Strategy Based Diagnosis for an overview of the diagnostic approach. |
| • | Diagnostic Procedure Instructions provides an overview of each diagnostic category. |
DTC Descriptors
DTC B2495 01: Liftgate Latch Control Circuit Short to BatteryDTC B2495 02: Liftgate Latch Control Circuit Short to Ground
Diagnostic Fault Information
Circuit | Short to Ground | Open/High Resistance | Short to Voltage | Signal Performance |
|---|---|---|---|---|
Liftgate Relay Switch B+ | 2 | 2 | -- | -- |
Liftgate Release Switch Signal | B3265 00 | B3265 00 | B3265 00 | -- |
Liftgate Relay Low Control | -- | 2 | 2 | -- |
Liftgate Relay Coil High Control | B2495 02 | 2 | B2495 01 | -- |
Liftgate Release Actuator Control | 2 | 2 | 2 | -- |
Liftgate Switch Ground | -- | 1 | 1 | -- |
Liftgate Release Actuator Ground | -- | 2 | 2 | -- |
1. Liftgate Release Switch Inoperative 2. Liftgate Release Inoperative | ||||
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 volts.
Conditions for Setting the DTC
B2495 01
The BCM detects a short to voltage on the liftgate relay high control circuit.
B2495 02
The BCM detects a short to ground on the liftgate relay high control circuit.
Action Taken When the DTC Sets
The liftgate release latch 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
Connector End View Reference
Vehicle Access Connector End Views
Description and Operation
Rear Hatch/Gate Description and Operation
Electrical Information Reference
Scan Tool Reference
Circuit/System Verification
Command the liftgate latch to release by pressing the liftgate switch. The liftgate release actuator should release the liftgate.
Circuit/System Testing
- Ignition OFF, disconnect the X4 and X7 harness connectors at the BCM.
- Connect a 10A fused jumper wire between the control circuit terminal 13 and B+. Verify the liftgate latch does not activate.
- If all circuits test normal, replace the BCM.
| ⇒ | If the liftgate latch activates, test the control circuit terminal 22 for a short to ground. If the circuit tests normal replace the I/P fuse block. |
| ⇒ | If the fuse in the jumper wire opens, test the B+ circuit terminal 13 for a short to ground. If the circuit tests normal replace the I/P fuse block. |
Repair Instructions
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.
| • | Control Module References for BCM replacement, setup, and programming |
