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 B3618 02 : Exterior Trunk Release Switch Circuit Short to GroundDiagnostic Fault Information
Circuit | Short to Ground | Open/High Resistance | Short to Voltage | Signal Performance |
|---|---|---|---|---|
Trunk Relay B+ | 1 | 1 | -- | -- |
Valet Switch B+ | 1 | 1 | -- | -- |
Rear Compartment Lid Exterior Release Switch Signal | B3618 02 | 3 | 3 | -- |
Rear Compartment Lid Interior Release Switch Signal | B2730 02 | 2 | 2 | -- |
Valet Switch Signal | 1 | 1 | 1 | -- |
Rear Compartment Lid Release Actuator Control | 1 | 1 | 1 | -- |
Trunk Release Relay Control | 1 | 1 | 1 | -- |
Rear Compartment Lid Release Actuator Ground | -- | 1 | -- | -- |
Rear Compartment Lid Exterior Release Switch Ground | -- | 3 | 3 | -- |
Rear Compartment Lid Interior Release Switch Ground | -- | 2 | 2 | -- |
1. Trunk Release Malfunction 2. Trunk Release Interior Switch Malfunction 3 Trunk Release Exterior Switch Malfunction | ||||
Circuit/System Description
The exterior rear compartment lid release switch receives a signal from the remote control door lock receiver (RCDLR). When the exterior rear compartment lid release switch is activated the signal circuit is pulled to ground. The RCDLR interprets this and sends a serial data message to the rear integration module (RIM) requesting the rear compartment lid be released. The rear integration module (RIM) grounds the trunk release relay control circuit which energizes the relay. The trunk release relay is supplied with battery voltage at all times. With the relay coil energized, the relay switch contacts close allowing battery voltage to flow to the rear compartment lid release actuator causing the rear compartment lid to release.
Conditions for Running the DTC
Battery voltage must be between 9-16 volts.
Conditions for Setting the DTC
When the RCDLR detects a short to ground in the exterior trunk release switch signal circuit for greater than 60 seconds.
Action Taken When the DTC Sets
The RCDLR will ignore the switch inputs from the exterior trunk release switch.
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 DTC. |
| • | A history DTC will clear after 50 ignition cycles. |
Reference Information
Schematic Reference
Connector End View Reference
Description and Operation
Luggage Compartment Description and Operation
Electrical Information Reference
Scan Tool Reference
Control Module References for scan tool information
Circuit/System Verification
Ignition ON, observe the scan tool Trunk Release Switch parameter while using the exterior trunk release switch, the parameter should change from Active to Inactive.
Circuit/System Testing
- Ignition OFF, disconnect the harness connector at the exterior rear compartment lid release switch.
- Ignition ON, verify the scan tool Trunk Release Switch parameter is Inactive.
- Install a 3A fused jumper wire between the signal circuit terminal A and ground. Verify the scan tool Trunk Release Switch parameter is Active.
- If all circuits test normal, test or replace the exterior rear compartment lid release switch.
| ⇒ | If not the specified value, test the signal circuit terminal A for a short to ground. If the circuit tests normal, replace the RCDLR. |
| ⇒ | 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. |
Component Testing
Exterior Rear Compartment Lid Release Switch
- Ignition OFF, disconnect the harness connector at the exterior rear compartment lid release switch.
- Test for infinite resistance between the signal terminal A and the ground terminal C with the switch in the open position.
- Test for less than 2 ohms between the signal terminal A and the ground terminal C with the switch in the closed position.
| ⇒ | If not the specified value, replace the exterior rear compartment lid release switch. |
| ⇒ | If greater than the specified range, replace the exterior rear compartment lid release switch. |
Repair Instructions
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.
| • | Control Module References for RCDLR replacement, setup, and programming |
