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 B3657 00: Valet Mode Switch CircuitDiagnostic Fault Information
Circuit | Short to Ground | Open/High Resistance | Short to Voltage | Signal Performance |
|---|---|---|---|---|
Trunk Release Relay Switch B+ | 1 | 1 | -- | -- |
Trunk Release Switch Signal | 2 | 2 | 2 | -- |
Valet Mode Switch Signal | B3657 00 | B3657 00 | B3657 00 | -- |
Rear Compartment Lid Latch Control | 2 | 2 | 2 | -- |
Trunk Release Relay Control | B3265 00 | B3265 00 | B3265 00 | -- |
Rear Compartment Lid Latch Ground | -- | 1 | 1 | -- |
Trunk Release Switch Ground | -- | 2 | 2 | -- |
Valet Switch Ground | -- | 3 | 3 | -- |
1. Trunk release is inoperative from both the switch and keyless entry transmitter 2. Trunk release is inoperative only from switch 3. Valet switch inoperative | ||||
Circuit/System Description
As a security measure, a valet switch in the glove compartment is used to disable the rear compartment release system. When the switch is activated and the glove compartment locked, it will prevent unauthorized access to the rear compartment. The body control module (BCM) monitors the valet mode switch signal circuit and when the switch is activated, the BCM detects the drop in voltage and will disable the rear compartment release system.
Conditions for Running the DTC
The system voltage is 9-16 volts.
Conditions for Setting the DTC
When the BCM detects a short to voltage or a short to ground in the valet mode switch signal circuit.
Action Taken When the DTC Sets
The BCM will disable the rear compartment release system.
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 Valet Switch parameter while pressing the top and bottom of the valet switch. The parameter should change between Active and Inactive.
Circuit/System Testing
- Ignition OFF, disconnect the harness connector at the valet switch.
- Test for less than 1 ohm between the ground circuit terminal A and ground.
- Ignition ON, verify the scan tool Valet Switch parameter is Inactive.
- Install a 3A fused jumper wire between the signal circuit terminal B and the ground circuit terminal A. Verify the scan tool Valet Switch parameter is Active.
- If all circuits test normal, test or replace the valet switch.
| ⇒ | If greater than the specified range, test the ground circuit for an open/high resistance. |
| ⇒ | If not the specified value, test the signal circuit for a short to ground. If the circuit tests normal, replace the BCM. |
| ⇒ | If not the specified value, test the signal circuit terminal B for a short to voltage or an open/high resistance. If the circuit tests normal, replace the BCM. |
Component Testing
- Ignition OFF, disconnect the harness connector at the valet switch.
- Test for infinite resistance between the signal terminal B and the ground terminal A with the switch in the open position.
- Test for less than 2 ohms between the signal terminal B and the ground terminal A with the switch in the closed position.
| ⇒ | If not the specified value, replace the valet switch. |
| ⇒ | If greater than the specified range, replace the valet switch. |
Repair Instructions
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.
Control Module References for BCM replacement, setup and programming.
