2010 Cadillac Truck Escalade EXT AWD V8-6.2L Page 960
* Diagnostic Procedure Instructions (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic Procedure
Instructions)provides an overview of each diagnostic category.
DTC Descriptors
DTC C0561 F0
- System Disabled Information Stored Invalid Serial Data Received
DTC C0561 F1
- System Disabled Information Stored Invalid Serial Data Received
Circuit/System Description
Diagnostics are used to determine whether or not there is a fault with the brake pressure or wheel speed data being received by the fuel pump/trailer
brake control module over GMLAN serial data.
The loss of serial data brake pressure diagnostic is to determine whether or not there is a fault with the brake pressure data being received over
GMLAN. This diagnostic looks at the brake pressure signal validity and protection value signals over a period of time to determine the fault state of
the brake pressure sensor.
The loss of serial data wheel speed diagnostic is to determine whether or not there is a fault with the wheel speed data being received over
GMLAN. This diagnostic looks at the wheel speed signal validity and sequence number errors over a period of time to determine the fault state
Conditions for Running the DTC
* Ignition ON.
* Ignition voltage is 9.5-17 V.
Conditions for Setting the DTC
* The EBCM diagnoses a fault condition in the master cylinder pressure sensor, and sends a serial data message to the fuel pump/trailer brake
control module.
* The EBCM diagnoses a fault condition in the wheel speed sensors, and sends a serial data message to the fuel pump/trailer brake control
module.
* The fuel pump/trailer brake control module losses communication with the EBCM.
Action Taken When the DTC Sets
* The trailer brake control will be disabled for the remainder of the ignition cycle.
* The driver information center (DIC) will display Service Trailer Brake System.
Conditions for Clearing the DTC
* The condition for the DTC is no longer present.
* The fuel pump/trailer brake control module clears the history DTC when a current DTC is not detected in 40 consecutive drive cycles.
Reference Information
Schematic Reference
Trailer Brake Control Schematics (See: Brakes and Traction Control/Diagrams/Electrical Diagrams)
Connector End View Reference
Component Connector End Views (See: Diagrams/Connector Views)
Description and Operation
Trailer Brake Controls Description and Operation (See: Powertrain Management/Computers and Control Systems/Description and
Operation/Trailer Brake Controls Description and Operation)
Electrical Information Reference
* Circuit Testing (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic Procedures/Circuit
Testing/Circuit Testing)
* Connector Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic
Procedures/Connector Repairs/Connector Repairs)
* Testing for Intermittent Conditions and Poor Connections (See: Testing and Inspection/Component Tests and General Diagnostics/General
Electrical Diagnostic Procedures/Circuit Testing/Testing for Intermittent Conditions and Poor Connections)
* Wiring Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic Procedures/Wiring
Repairs/Wiring Repairs)
