Antilock Brake System

DTC C0561

Diagnostic Instructions

* Perform the Diagnostic System Check - Vehicle (with HP2) (Initial Inspection and Diagnostic Overview)Diagnostic System Check - Vehicle (without HP2) (Initial Inspection and Diagnostic Overview) prior to using this diagnostic procedure.
* Review Strategy Based Diagnosis (Initial Inspection and Diagnostic Overview) for an overview of the diagnostic approach.
* Diagnostic Procedure Instructions (Initial Inspection and Diagnostic Overview) provides an overview of each diagnostic category.

DTC Descriptors
DTC C0561 4B
- System Disabled Information Stored Calibration Not Learned

DTC C0561 54
- System Disabled Information Stored Temparature High

DTC C0561 59
- System Disabled Information Stored Component Protection Time Out

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

DTC C0561 72
- System Disabled Information Stored Alive Counter Incorrect

DTC C0561 74
- System Disabled Information Stored Value of Signal Protection Calculation Incorrect

DTC C0561 75
- System Disabled Information Stored Signal Above Allowable Range

Circuit/System Description

The electronic brake control module (EBCM) receives serial data messages from other modules which are needed to perform antilock brake system (ABS), vehicle stability enhancement system (VSES), or traction control system (TCS) functions.

Conditions for Running the DTC

* Ignition ON.
* Ignition voltage is greater than 10 volts.

Conditions for Setting the DTC

The EBCM receives an invalid serial data message from another module which causes EBCM to deactivate ABS, VSES, TCS, etc.

Action Taken When the DTC Sets

* The EBCM disables the antilock brake system (ABS), traction control and the vehicle stability enhancement system (VSES) for the duration of the ignition cycle.
* A DIC message and/or a warning indicator may be displayed.

Conditions for Clearing the DTC

* The condition for the DTC is no longer present.
* It may take 2 ignition cycles to clear this DTC.
* The EBCM clears the history DTC when a current DTC is not detected in 40 consecutive drive cycles.

Reference Information
Schematic Reference

Antilock Brake System Schematics ()
Connector End View Reference

Component Connector End Views (Connector Views)
Description and Operation

ABS Description and Operation (Description and Operation)
Electrical Information Reference

* Circuit Testing (Component Tests and General Diagnostics)
* Connector Repairs (Component Tests and General Diagnostics)
* Testing for Intermittent Conditions and Poor Connections (Component Tests and General Diagnostics)
* Wiring Repairs (Component Tests and General Diagnostics)

Scan Tool Reference

Control Module References (Programming and Relearning) for scan tool information

Circuit/System Verification

1. Verify that no other DTCs are set

• If DTC is set, refer to Diagnostic Trouble Code (DTC) List - Vehicle (Diagnostic Trouble Code Descriptions)

2. With a Tech 2, view the Invalid Signal Data Display

• If no invalid signals are present, view Signal Fault Data in the Enhanced DTC Data.

3. Perform the EBCM Relearn function under Module Setup. If DTC resets, replace the EBCM.