B3618

DTC B3618

Diagnostic Instructions

* Perform the Diagnostic System Check - Vehicle (Initial Inspection and Diagnostic Overview) prior to using this diagnostic procedure.
* Review Strategy Based Diagnosis (Initial Inspection and Diagnostic Overview) for an overview of the diagnostic approach.
* Diagnostic Procedure Instructions (Initial Inspection and Diagnostic Overview) provides an overview of each diagnostic category.

DTC Descriptor
DTC B3618
- Exterior Trunk Release Switch Circuit

Diagnostic Fault Information





Circuit/System Description

The exterior trunk release switch is located just under the lip of the deck lid in the license plate pocket area. As a vehicle with locked doors is approached with a key fob and the exterior trunk release switch is pressed, the keyless entry antenna transmitter broadcasts a challenge approximately in a 1-meter range to the key fob. If the response from the key fob via radio frequency (RF) is a valid response, the locked door will be passively unlocked/unlatched allowing the trunk to be opened.

Conditions for Running the DTC

Battery voltage must be between 9-16 volts.

Conditions for Setting the DTC

The remote control door lock receiver (RCDLR) detects a short to ground in the exterior trunk release switch circuit for greater than 3 minutes.

Actions Taken When the DTC Sets

The exterior trunk release switch will be inoperative.

Conditions for Clearing the DTC

* The condition responsible for setting the DTC no longer exists.
* A history DTC will clear after 50 malfunction-free ignition cycles.

Reference Information
Schematic Reference

Release Systems Schematics (Release Systems Schematics)
Connector End View Reference

Component Connector End Views (Connector Views)
Description and Operation

Luggage Compartment Description and Operation (Coupe) (Description and Operation)
Electrical Information Reference

* Circuit Testing (Component Tests and General Diagnostics)
* Connector Repairs (Component Tests and General Diagnostics)
* Testing for Intermittent Conditions and Poor Connections (Component Tests and General Diagnostics)
* Wiring Repairs (Component Tests and General Diagnostics)

Scan Tool Reference

Control Module References (Programming and Relearning) for scan tool information

Circuit/System Verification

Ignition ON, observe the scan tool Ext. Rear Compartment Lid Release Sw. parameter while pressing and releasing the exterior rear compartment lid release switch. The parameter should change between Active and Inactive.

Circuit/System Testing

1. Ignition OFF, disconnect the harness connector at the exterior rear compartment lid release switch.
2. Ignition ON, verify the scan tool Ext. Rear Compartment Lid Release Sw. parameter is Inactive.

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

3. Install a 3A fused jumper wire between the signal circuit terminal A and ground. Verify the scan tool Ext. Rear Compartment Lid Release Sw. parameter 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 RCDLR.

4. If all circuits test normal, test or replace the exterior rear compartment lid release switch.

Component Testing

1. Ignition OFF, disconnect the harness connector at the exterior rear compartment lid release switch.
2. Test for infinite resistance between the signal terminal A and the ground terminal C with the switch in the open position.

• If not the specified value, replace the exterior rear compartment lid release switch.

3. Test for less than 2 ohms between the signal terminal A and the ground terminal C with the switch in the closed position.

• If greater than the specified range, replace the exterior rear compartment lid release switch.

Repair Instructions

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

* Rear Compartment Lid Pulldown Switch Replacement (Service and Repair)
* Control Module References (Programming and Relearning) for RCDLR replacement, setup, and programming