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 B0005: In Park Switch Signal CircuitDiagnostic Fault Information
Circuit | Short to Ground | Open/High Resistance | Short to Voltage | Signal Performance |
|---|---|---|---|---|
Park Brake Switch Signal | B0005 | -- | -- | -- |
Circuit/System Description
The body control module (BCM) monitors the park brake switch via the park brake switch signal circuit. With the park brake applied, the switch is closed and the signal circuit is grounded. The BCM will then send a serial data message to the instrument panel cluster (IPC) requesting the red brake warning indicator be illuminated.
Conditions for Running the DTC
Ignition is ON.
Conditions for Setting the DTC
The BCM detects the park brake switch signal is grounded and the vehicle speed is greater than 5 km/h (8 mph).
Action Taken When the DTC Sets
The red brake warning indicator is illuminated.
Conditions for Clearing the DTC
| • | A current DTC will clear when the condition for setting the DTC is no longer present. |
| • | A history DTC will clear after 100 malfunction-free ignition cycles. |
Reference Information
Schematic Reference
Connector End View Reference
Hydraulic Brake Connector End Views
Description and Operation
Hydraulic Brake System Description and Operation
Electrical Information Reference
Scan Tool Reference
Circuit/System Verification
Observe the scan tool BCM Park Brake Switch parameter while applying and releasing the park brake. The parameter should cycle between Applied and Release.
Circuit/System Testing
- Ignition OFF, disconnect the harness connector at the park brake switch.
- Ignition ON, verify the scan tool BCM Park Brake Switch parameter is Released.
- Install a 3A fused jumper wire between the signal circuit terminal A and ground. Verify the scan tool BCM Park Brake Switch parameter is Applied.
- If all circuits test normal, test or replace the park brake switch.
| ⇒ | If not the specified value, test the signal circuit terminal A for a short to ground. If the circuit tests normal, replace the BCM. |
| ⇒ | 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 BCM. |
Repair Instructions
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.
| • | Control Module References for BCM replacement, setup, and programming |
