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 Descriptors
DTC B0005 00 : In Park Signal CircuitDiagnostic Fault Information
Circuit | Short to Ground | Open/High Resistance | Short to Voltage | Signal Performance |
|---|---|---|---|---|
Brake Fluid Level Signal | 1 | C0267 00 | 1 | -- |
Park Brake Signal | B0005 00 | 1 | 1 | -- |
Ground | -- | C0267 00 | -- | -- |
1. Brake Warning Indicator Malfunction | ||||
Circuit/System Description
The body control module (BCM) monitors the status of the park brake. When the BCM receives a ground input from the park brake switch, a serial data message is sent to the instrument panel cluster (IPC) requesting illumination of the red brake warning indicator.
Conditions for Running the DTC
The ignition is ON.
Conditions for Setting the DTC
The vehicle speed is greater than 8 km/h (5 mph) and the BCM receives a ground from the park brake switch.
Action Taken When the DTC Sets
The Red Brake Warning indicator illuminates.
Conditions for Clearing the DTC
| • | The condition for the DTC is no longer present. |
| • | The electronic brake control module (EBCM) clears the history DTC when a current DTC is not detected in 100 consecutive drive cycles. |
Diagnostic Aids
This DTC may indicate that the vehicle has been driven with the park brake engaged.
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
Ignition ON, observe the scan tool BCM Park Brake Switch parameter. The reading should be Released and change between Applied and Released when pressing and depressing the park brake.
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. |
Component Testing
- Ignition OFF, disconnect the harness connector at the park brake switch.
- Test for infinite resistance between the park brake switch terminal A and ground, with the park brake released.
- Test for less than 1 ohm between the park brake switch terminal A and ground with the park brake applied.
| ⇒ | If less than specified range, replace the park brake switch. |
| ⇒ | If greater than specified range, replace the park brake switch. |
Repair Instructions
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.
| • | Control Module References for BCM and replacement, setup, and programming |
