Park Brake

DTC C0558

Diagnostic Instructions

* Perform the Diagnostic System Check - Vehicle Diagnostic System Check - Vehicle prior to using this diagnostic procedure.
* Review Strategy Based Diagnosis Strategy Based Diagnosis for an overview of the diagnostic approach.
* Diagnostic Procedure Instructions Diagnostic Procedure Instructions provide an overview of each diagnostic category.

DTC Descriptors
DTC C0558 55
- Calibration Data Too Few Transitions

DTC C0558 5A
- Calibration Data Not Plausible

Circuit/System Description

The electric parking brake control module has an internal motor, apply actuator, release actuator, and temperature sensor. The electric parking brake control module also contains the logic for applying and releasing the parking brake when commanded by the electric parking brake switch. When the electric parking brake control module receives a signal from the switch the internal circuit board temperature is checked to verify it is within operating range before the control module performs the requested operation.

Conditions for Running the DTC

Ignition OFF, ACCESSORY, or RUN mode.

Conditions for Setting the DTC

C0558 55

The electric parking brake control module detects a calibration malfunction.

C0558 5A

The electric parking brake control module detects mechanical problems with the parking brake system.

Action Taken When the DTC Sets

C0558 55
* The electric parking brake is disabled, switch command will not be accepted.
* A message and/or a warning indicator may be displayed.

C0558 5A
* The electric parking brake is disabled, one release allowed.
* A message and/or a warning indicator may be displayed.

Conditions for Clearing the DTC

* The electric parking brake module clears the history DTC when a current DTC is not detected in 40 ignition cycles.
* Calibrate the electric parking brake module.

Diagnostic Aids

* Verify the electric parking brake control module software and calibrations are the newest available versions.
* Verify the parking brake cable is not broken or pinched.

Reference Information
Schematic Reference

Park Brake System Schematics [1][2]Electrical Diagrams
Connector End View Reference

Component Connector End Views Connector Views
Description and Operation

Electronic Parking Brake Control Module Description Description and Operation
Electrical Information Reference

* Circuit Testing Circuit Testing
* Connector Repairs Connector Repairs
* Testing for Intermittent Conditions and Poor Connections Testing for Intermittent Conditions and Poor Connections
* Wiring Repairs Wiring Repairs

Scan Tool Reference

Control Module References Control Module References for scan tool information

Circuit/System Verification

1. Ignition ON, command the Parking Brake Cable Apply ON with a scan tool. Verify the Park Brake Position parameter is below 1250 counts.

• If greater than the specified value, make sure the park brake cable is connected properly and check park brake linings for excessive wear, and ensure proper clearance to drum.

2. Verify DTC C0558 is not set.

• If DTC is set, perform the Parking Brake Calibration procedure in Module Setup.

Repair Instructions

Perform the Diagnostic Repair Verification Verification Tests after completing the diagnostic procedure.

Control Module References Control Module References for Electric Parking Brake Module replacement, setup, and programming.