2010 Cadillac Truck Escalade EXT AWD V8-6.2L Page 960

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)