B2732

DTC B2732

DTC Descriptor

DTC B2732
- Trunk Release Switch Circuit Low

Diagnostic Fault Information

Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure. Initial Inspection and Diagnostic Overview





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.

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

1. Ignition OFF, disconnect the harness connector at the Liftgate Release Switch.
2. Ignition ON, verify the scan tool Liftgate Release is Inactive.

• If not the specified value, test the signal circuit terminal D for a short to ground. If the circuit tests normal, replace the BCM.

3. Install a 3-amp fused jumper wire between the signal circuit terminal D and ground. Verify the scan tool Liftgate Release is Active.

• 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.

4. If all circuits test normal, test or replace the liftgate release switch.

Component Testing

1. Ignition OFF, disconnect the harness connector at the liftgate release switch.
2. Test for infinite resistance between the signal terminal D and the ground circuit terminal C with the switch in the open position.

• If not the specified value, replace the liftgate release switch.

3. 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 greater than the specified range, replace the liftgate release switch.

Repair Instructions

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

* Instrument Panel Multifunction Switch Assembly Replacement
* Programming and Relearning for BCM Programming and Relearning