DTC C0561
Diagnostic Instructions
DTC Descriptor
DTC C0561 71: System Disabled Information Stored Invalid Serial Data Received
Circuit/System Description
The rear differential clutch control module (CCM) receives messages from other modules over GMLAN which are needed to perform all wheel drive functions.
Conditions for Running the DTC
• | Ignition voltage is greater than 9.5 volts. |
Conditions for Setting the DTC
The CCM receives an invalid message from the PCM, EBCM, modules over GMLAN which causes the CCM to deactivate.
Action Taken When the DTC Sets
All wheel drive indicator illuminates.
Conditions for Clearing the DTC
• | The condition for the DTC is no longer present. |
• | The DTC is not detected in 40 consecutive drive cycles. |
Diagnostic Aids
DTC C0561 is an indicator that the CCM receives an invalid message from the ECM, or EBCM , and does not necessarily indicate a fault is present with the CCM. This DTC should not be used as a fault indicator, but rather as a symptom to assist in the diagnosis of these other systems.
Reference Information
Schematic Reference
Rear Axle Schematics
Connector End View Reference
Component Connector End Views
Description and Operation
Rear Drive Axle Description and Operation
Electrical Information Reference
Scan Tool Reference
Control Module References for scan tool information
Circuit/System Verification
Verify that no DTCs are set in the ECM or EBCM.
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