Service Information

Volt

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 provide an overview of each diagnostic category.

DTC Descriptors

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

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

Conditions for Clearing the DTC

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

•	The hand brake control module receives Valid signals from other modules.

Reference Information

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

Using the scan tool, locate the Invalid parameter in the Data Display.
Refer to the appropriate module to diagnose the invalid data signal. Do not replace the electric hand brake control module.

Repair Instructions

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.