For 1990-2009 cars only
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 |
|---|---|---|---|---|
Latch Open Control | B2495 02 | B2495 01 | B2495 01 | -- |
Latch Close Control | B2495 02 | B2495 01 | B2495 01 | -- |
Circuit/System Description
The latch motor is a bi-directional motor and latch or unlatch operation is the result of the direction of the motor rotation. The liftgate control module controls the latch motor through the control circuits by suppling power and ground in the appropriate polarity. The motor control circuits are monitored by the liftgate control module prior to activation for a high or low condition and during motor operation for an insufficient current flow condition.
Conditions for Running the DTC
| • | System voltage to the liftgate control module must be 9-16 volts. |
| • | Power open or close function is initiated. |
Conditions for Setting the DTC
| • | The liftgate control module detects a high or low condition on one of the control circuits prior to being activated. |
| • | During latch or unlatch operation the liftgate control module detects insufficient current flow on the control circuits. |
Action Taken When the DTC Sets
Power latch operation will be suspended.
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 status code. |
Reference Information
Schematic Reference
Connector End View Reference
Electrical Information Reference
Scan Tool Reference
Circuit/System Testing
- Disconnect the liftgate control module connector C2.
- Using a DMM verify that 1-3 ohms is present between the liftgate latch motor control circuit terminals in the harness connector.
- Using a DMM verify that no continuity is present between either of the motor control circuit terminals in the harness connector and ground.
- If the liftgate latch motor control circuits test normal, replace the liftgate control module.
| ⇒ | If excessive resistance is present between the motor control circuits, replace the liftgate latch assembly. |
| ⇒ | If continuity is present from a motor control circuit and ground, replace the liftgate latch assembly. |
Repair Instructions
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.
| • | Control Module References for liftgate control module replacement, setup, and programming |
