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DTC C0561

DTC C0561

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 C0561 71

System Disabled Information Stored-Invalid Serial Data Received

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

Conditions for Running the DTC


• Ignition OFF, ACCESSORY, or RUN mode.

• Battery voltage is between 9-16V


Conditions for Setting the DTC

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

• The electric parking brake receives Valid signals from other modules.


Reference Information

Schematic Reference

Park Brake System Schematics

Connector End View Reference

Component Connector End Views

Description and Operation

Electronic Parking Brake Control Module Description

Electrical Information Reference


• Circuit Testing

• Connector Repairs

• Testing for Intermittent Conditions and Poor Connections

• Wiring Repairs


Scan Tool Reference

Control Module References for scan tool information

Circuit/System Verification


1. Using the scan tool, locate the Invalid parameter in the Data Display.

2. Refer to the appropriate module to diagnose the invalid data signal. Do not replace the electric parking brake control module.


Repair Instructions

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.