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 Descriptor
DTC B2732: Trunk Release Switch Circuit LowDiagnostic Fault Information
Circuit | Short to Ground | Open/High Resistance | Short to Voltage | Signal Performance |
|---|---|---|---|---|
Liftgate Lock Motor Unlock Control Circuit | 1 | 1 | 1 | -- |
Liftgate Lock Motor Lock Control Circuit | 1 | 1 | 1 | -- |
Liftgate Release Switch Signal | B2732 | 1, 2 | B2732 | -- |
Liftgate Release Switch Ground | -- | 1, 2 | 1, 2 | -- |
1. Liftgate Release Inoperative 2. Liftgate Release Switch Inoperative | ||||
Circuit/System Description
The liftgate release switch provides a ground input to the body control module (BCM) when the switch is closed. This input allows the BCM to detect when a liftgate release switch request is received.
Conditions for Running the DTC
Battery voltage must be between 9-16 volts.
Conditions for Setting the DTC
The BCM detects the Liftgate Release Switch Signal has a short to ground.
The conditions above must be present for more than 60 seconds.
Action Taken When the DTC Sets
| • | The BCM stores the DTC to memory. |
| • | The liftgate release switch will be inoperative. |
Conditions for Clearing the DTC
| • | This DTC will change from current to history when the fault is no longer present. |
| • | A history DTC will clear after 100 consecutive ignition cycles if the condition for the malfunction is no longer present. |
| • | The technician issues a scan tool CLEAR DTCs command. |
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
Ignition ON, observe the Liftgate Release switch parameter while pressing the Liftgate Release Switch. The reading should change between Lock and Unlock.
Circuit/System Testing
- Ignition OFF, disconnect the harness connector at the Liftgate Release Switch.
- Ignition ON, verify the scan tool Liftgate Release is Inactive.
- Install a 3-amp fused jumper wire between the signal circuit terminal D and ground. Verify the scan tool Liftgate Release is Active.
- If all circuits test normal, test or replace the liftgate release switch.
| ⇒ | If not the specified value, test the signal circuit terminal D for a short to ground. If the circuit tests normal, replace the BCM. |
| ⇒ | If not the specified value, test the signal circuit for a short to voltage or an open/high resistance. If the circuit tests normal, replace the BCM. |
Component Testing
- Ignition OFF, disconnect the harness connector at the liftgate release switch.
- Test for infinite resistance between the signal terminal D and the ground circuit terminal C with the switch in the open position.
- Test for less than 2 ohms between the signal terminal D and the ground circuit terminal C with the switch in the closed position.
| ⇒ | If not the specified value, replace the liftgate release switch. |
| ⇒ | If greater than the specified range, replace the liftgate release switch. |
Repair Instructions
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.
| • | Control Module References for BCM replacement, setup, and programming |
