Park Brake

DTC C0561

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 C0561 71
- System Disabled Information Stored-Invalid Serial Data Received

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. The parking brake module will verify it has a valid signal from other modules before it performs the requested operation.

Conditions for Running the DTC

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

* Battery voltage is between 9-16 V

Conditions for Setting the DTC

The parking brake control module receives an invalid serial data message or does not receive a serial data message from another module.

Action Taken When the DTC Sets

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

* The electric parking brake functionality is degraded.

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 receives Valid signals from other modules.

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

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 the scan tool park brake control module Invalid Signal Identification parameters are all Valid.

• If any parameter is Invalid
Refer to the appropriate subsection in which the failure occurred. Refer to Symptoms - Vehicle Symptoms - Vehicle

• If all parameters are Valid

4. All OK.