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 | 1, 2 | 1 | 1 | -- |
Liftgate Relay Low Control | -- | 2 | B3265 00 | -- |
Liftgate Relay High Control | B2495 02 | 2 | B2495 01 | -- |
Liftgate Latch Control | 2 | 2 | 2 | -- |
Liftgate Latch Ground | -- | 2 | 2 | -- |
Liftgate Switch Ground | -- | 1 | 1 | -- |
1. Liftgate Release Switch Malfunction 2. Liftgate Release Malfunction | ||||
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
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
Connector End View Reference
Description and Operation
Rear Hatch/Gate Description and Operation
Electrical Information Reference
Scan Tool Reference
Control Module References for scan tool information
Circuit/System Verification
Command the liftgate release by pressing the liftgate release switch. The liftgate latch assembly should release the liftgate.
Circuit/System Testing
- Ignition OFF, disconnect the X1 harness connector at the I/P fuse block.
- Connect a test lamp between the control circuit terminal 6 and ground.
- Command the liftgate latch assembly ON and OFF by pressing and releasing the liftgate release switch, the test lamp should turn ON and OFF when changing between the commanded states.
- If all circuits test normal, replace the I/P fuse block.
| ⇒ | If the test lamp is always ON, test the control circuit for a short to voltage. If the circuit tests normal, replace the 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 BCM. |
Repair Instructions
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.
| • | Control Module References for BCM replacement, setup, and programming |
