• | 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. |
Circuit | Short to Ground | Open/High Resistance | Short to Voltage | Signal Performance |
---|---|---|---|---|
Trunk Key Switch Signal | 1, 2 | 1, 2 | 1, 2 | -- |
Trunk Release Relay Control | 1, 2 | 1, 2 | B3265 | -- |
Trunk Release Switch Signal - Exterior | B3618 | 1, 2 | 1, 2 | -- |
Trunk Release Switch Signal - Interior | 1, 2 | 1, 2 | 1, 2 | -- |
Rear Compartment Lid Pull Down Actuator B+ | 1 | 1 | 1 | -- |
Rear Compartment Lid Latch Assembly B+ | 2 | 2 | 2 | -- |
Rear Compartment Lid Key Switch Ground | 2 | 2 | 2 | -- |
Rear Compartment Lid Latch Assembly Ground | 2 | 2 | 2 | -- |
Rear Compartment Lid Pull Down Actuator Ground | 1 | 1 | 1 | -- |
Rear Compartment Lid Release Switch Exterior Ground | 1, 2 | 1, 2 | 1, 2 | -- |
Rear Compartment Lid Release Switch Interior Ground | 1, 2 | 1, 2 | 1, 2 | -- |
1. Trunk Release Inoperative - Coupe 2. Trunk Release Inoperative - Convertible |
The body control module (BCM) grounds the trunk release control signal circuit based on trunk release switch signals from either the interior rear compartment lid release switch or the exterior rear compartment lid release switch. The rear compartment lid pull down actuator is supplied battery voltage at all times via the TRUNK RELEASE fuse. When either the interior or exterior rear compartment lid release switch is pressed, the trunk release switch signal circuit is grounded. This input will request the BCM to momentarily ground the trunk release control signal circuit, which will open the rear compartment lid. For more detailed information concerning trunk release operation refer to Luggage Compartment Description and Operation .
The rear compartment lid release is active.
• | The BCM detects a short to battery on the trunk release control signal circuit. |
• | The condition is present for more than 125 ms. |
The BCM disables the rear compartment lid release for the duration of the ignition cycle.
• | The condition responsible for setting the DTC no longer exists. |
• | You issue a scan tool CLEAR DTCs command. |
• | A history DTC will clear after 50 malfunction-free ignition cycles. |
Vehicle Access Connector End Views
⇒ | If the test lamp illuminates, test for a short to voltage on the trunk release control signal circuit. If the circuit tests normal, replace the BCM. |
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.
• | Control Module References for BCM replacement, setup, and programming |