For 1990-2009 cars only
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 Descriptor
DTC C0561 71: System Disabled Information StoredCircuit/System Description
The electronic brake control module (EBCM) disables the traction control when other electronic control modules set DTCs for components that affect the operation of the traction control system (TCS).
Conditions for Running the DTC
| • | The ignition is ON. |
| • | Ignition voltage is greater than 8 volts. |
Conditions for Setting the DTC
The engine control module (ECM) or body control module (BCM) diagnoses a condition preventing the engine control portion of the traction control function and sends a high speed GMLAN serial data message to the EBCM indicating that torque reduction is not allowed. The ECM or BCM will typically set a DTC and the EBCM will set DTC C0561.
Action Taken When the DTC Sets
| • | The EBCM disables the TCS while the DTC is current. |
| • | The traction control off indicator turns ON. |
| • | The driver information center (DIC) displays the TRACTION SYSTEM OFF message. |
| • | The antilock brake system (ABS) remains functional. |
Conditions for Clearing the DTC
| • | The condition for setting the DTC is no longer present. |
| • | The EBCM automatically clears the history DTC when a current DTC is not detected in 100 consecutive drive cycles. |
Diagnostic Aids
This DTC is for information only. As an aid to the technician, this DTC indicates that there are no problems in the ABS/TCS.
Reference Information
Schematic Reference
Antilock Brake System Schematics
Connector End View Reference
Description and Operation
Electrical Information Reference
Scan Tool Reference
