Park Brake

DTC C0574

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 C0574 01
- Circuit Board Temperature Sensor Short to Battery

DTC C0574 02
- Circuit Board Temperature Sensor Short to Ground

DTC C0574 54
- Circuit Board Temperature Sensor High

Circuit/System Description

The parking brake control module has an internal motor, apply actuator, release actuator, and temperature sensor. The parking brake control module also contains the logic for applying and releasing the parking brake when commanded by the park brake control switch. When the 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

Vehicle OFF, Vehicle in Service Mode, Vehicle ON, or Engine Running.

Conditions for Setting the DTC

C0574 01, C0574 02

The parking brake control module detects a short to battery or a short to ground.

C0574 54

The parking brake control module has detected an internal temperature that is above the allowed value.

Action Taken When the DTC Sets

* A message and/or a warning indicator may be displayed.

* The electric parking brake is disabled, one release allowed.

Conditions for Clearing the DTC

* The parking brake control module clears the history DTC when a current DTC is not detected in 40 consecutive drive cycles.

* The parking brake control module is replaced or the internal temperature drops below the allowed temperature.

Diagnostic Aids

Check for debris on the parking brake control module which may cause the module to overheat.

Reference Information

Schematic Reference

Park Brake System Schematics [1][2]Electrical Diagrams

Connector End View Reference

Component Connector End Views Hybrid/EV Battery Pack X1

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 Programming and Relearning for scan tool information

Circuit/System Verification

C0574 01 or C0574 02

1. Vehicle in service mode.

2. Verify no additional DTCs are set in other control modules.

• If additional DTCs are set
Refer to Diagnostic Trouble Code (DTC) List - Vehicle Diagnostic Trouble Code (DTC) List - Vehicle

• If no additional DTCs are set

3. Verify that DTC C0574 01 or C0574 02 is not set.

• If DTC C0574 01 or C0574 02 is set

1. Vehicle OFF. Remove the parking brake control module fuse and reinstall. Vehicle in service mode.

2. Verify DTC C0574 01 or C0574 02 is not set.

• If the DTC is set,
replace the K83 parking brake control module.

• If the DTC is not set

3. All OK.

• If DTC C0574 01 or C0574 02 is not set

4. Allow the K83 parking brake control module to cool down for 15 minutes.

5. Verify the scan tool Calculated System Temperature parameter is less than 105° C.

• If 105° C or greater
Replace the K83 parking brake control module.

• If less than 105° C

6. All OK.

Repair Instructions

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

Control Module References Programming and Relearning for parking brake control module replacement, programming and setup