Diagnostic Instructions
| • | Perform the prior to Diagnostic System Check - Vehicle 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 00: Exterior Liftgate Unlatch Switch CircuitDiagnostic Fault Information
Circuit | Short to Ground | Open/High Resistance | Short to Voltage | Signal Performance |
|---|---|---|---|---|
Rear Compartment Lid Exterior Release Switch Signal | B3618 00 | 2 | B3618 00 | -- |
Rear Compartment Lid Exterior Release Switch Ground | -- | B3618 00 | B3618 00 | -- |
1. Trunk Release Malfunction 2. Trunk Release Exterior Switch Malfunction | ||||
Circuit/System Description
The exterior rear compartment lid release switch receives a signal from the body control module (BCM). When the exterior rear compartment lid release switch is activated the signal circuit is pulled to ground. The BCM applies battery positive voltage to the trunk release relay control circuit which energizes the relay. The trunk release relay is grounded 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 V.
Conditions for Setting the DTC
The BCM detects a fault in the exterior trunk release switch signal circuit.
Action Taken When the DTC Sets
The rear compartment latch will not operate.
Conditions for Clearing the DTC
| • | This 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
Command the trunk release by using the exterior rear compartment lid release switch. The rear compartment lid release actuator should release the trunk lid.
Circuit/System Testing
- Ignition OFF, disconnect the harness connector at the S58A Rear Compartment Lid Release Switch - Exterior.
- Connect a 3 A jumper between the rear compartment lid exterior release switch signal terminal 1 and ground. The rear compartment lid actuator should click.
- Test for less than 1 Ω between the ground circuit terminal 3 and ground.
- If all circuits test normal, test or replace the S58A Rear Compartment Lid Release Switch - Exterior.
| ⇒ | If the rear compartment lid actuator does not click, test the rear compartment lid exterior release switch signal for an open/high resistance. |
| ⇒ | If greater than the specified range, test the ground circuit for an open/high resistance. |
Component Testing
- Ignition OFF, disconnect the harness connector at the S58A Rear Compartment Lid Release Switch - Exterior.
- Test for infinite resistance between the signal terminal 1 and the ground terminal 3 with the switch in the open position
- Test for less than 2 Ω between the signal terminal 1 and the ground terminal 3 with the switch in the closed position.
| ⇒ | If not within the specified range, replace the S58A Rear Compartment Lid Release Switch - Exterior. |
| ⇒ | If less than the specified value, replace the S58A Rear Compartment Lid Release Switch - Exterior. |
Repair Instructions
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.
| • | Control Module References for BCM replacement, setup and programming |
