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 B3641: Trunk Close Switch CircuitDiagnostic Fault Information
Circuit | Short to Ground | Open/High Resistance | Short to Voltage | Signal Performance |
|---|---|---|---|---|
Rear Compartment Lid Release Close Switch B+ | 1 | 1 | B3641 | -- |
Rear Compartment Lid Pull Down Actuator B+ | 1 | 1 | 1 | -- |
Trunk Release Switch B+ | 1 | 1 | 1 | -- |
Trunk Key Switch Signal | 1 | 1 | 1 | -- |
Trunk Release Control Signal | 1 | 1 | B3265 | -- |
Exterior Trunk Release Switch Signal | B3618 | 1 | 1 | -- |
Interior Trunk Release Switch Signal | 1 | 1 | 1 | -- |
Rear Compartment Lid Pull Down Actuator Signal | B1297 | B1297 | B1297 | -- |
Rear Compartment Lid Pull Down Actuator Ground | 1 | 1 | 1 | -- |
Rear Compartment Lid Release Switch Exterior Ground | 1 | 1 | 1 | -- |
Rear Compartment Lid Release Switch Interior Ground | 1 | 1 | 1 | -- |
Rear Compartment Lid Release Close Switch Ground | 1 | 1 | 1 | -- |
1. Trunk Release Inoperative | ||||
Circuit Description
The folding top control (FTC) module checks the integrity of the signal circuits from the rear compartment lid release close switch at least once every 300 milliseconds. The rear compartment lid release close switch has a constant battery positive voltage supplied. Pressing the rear compartment lid release close switch will apply the battery positive voltage to the rear compartment lid release close switch signal circuit to the FTC module. The FTC module monitors the signal request and will operate the rear compartment lid when battery positive voltage is received.
Conditions for Running the DTC
| • | Battery voltage must be between 9-16 volts. |
| • | DTC B1327 is not set as current. |
Conditions for Setting the DTC
The FTC module detects a short to battery in the rear compartment lid release switch circuit for more than 5 seconds.
Actions Taken When the DTC Sets
The rear compartment lid pull-down feature will be inactive from the rear compartment lid release switch.
Conditions for Clearing the DTC
| • | The condition responsible for setting the DTC no longer exists. |
| • | A history DTC will clear once 50 consecutive malfunction-free ignition cycles have occurred. |
Diagnostic Aids
A rear compartment lid release switch that is held or stuck in the closed position for more than 5 seconds will set DTC B3641.
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 Testing
- Ignition OFF, disconnect the harness connector at the rear compartment lid release switch.
- Ignition ON, verify that a test lamp illuminates between the B+ circuit terminal D and ground.
- Ignition OFF, connect the harness connector at the rear compartment lid release switch and disconnect the X2 harness connector at the FTC module.
- Ignition ON, connect a test lamp between the signal circuit terminal C1 and ground.
- Command the rear compartment lid to release by pressing and releasing the rear compartment lid release switch. The test lamp should illuminate with each press of the switch.
- If all circuits test normal, replace the FTC module.
| ⇒ | If the test lamp does not illuminate, test the B+ circuit for a short to ground or an open/high resistance. |
| ⇒ | If the test lamp is always ON, test the signal circuit for a short to voltage. If the circuit tests normal, test or replace the rear compartment lid release switch. |
| ⇒ | If the test lamp is always OFF, test the signal circuit for a short to ground or an open/high resistance. If the circuit tests normal, test or replace the rear compartment lid release switch. |
Component Testing
- Ignition OFF, disconnect the harness connector at the rear compartment lid release switch.
- Test for infinite resistance between the signal terminal A and the B+ terminal D with the switch in the open position.
- Test for less than 2 ohms between the signal terminal A and the B+ terminal D with the switch in the closed position.
| ⇒ | If not the specified value, replace the rear compartment lid release switch. |
| ⇒ | If greater than the specified range, replace the rear compartment lid release switch. |
Repair Instructions
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.
| • | Control Module References for FTC module replacement, setup, and programming |
