Monday, December 28, 2020

2010 Cadillac Truck SRX AWD V6-3.0L Page 785

2010 Cadillac Truck SRX AWD V6-3.0L Page 785



* Review Strategy Based Diagnosis (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Strategy Based Diagnosis) for an



overview of the diagnostic approach.



* Diagnostic Procedure Instructions (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic Procedure



Instructions) provide an overview of each diagnostic category.



DTC Descriptors



DTC C056E 41



- Electronic Control Unit Software Not Programmed



DTC C056E 42



- Electronic Control Unit Software Calibration Not Programmed



DTC C056E 5A



- Electronic Control Unit Software Not Plausible



Circuit/System Description



The parking brake control module has an internal motor, apply actuator, release actuator, and temperature sensor. The parking brake control module



also contains the logic for applying and releasing the parking brake when commanded by the park brake control switch. When the parking brake



control module receives a signal from the switch the internal circuit board temperature is checked to verify it is within operating range before the



control module performs the requested operation.



Conditions for Running the DTC



Ignition OFF, ACCESSORY, or RUN mode.



Conditions for Setting the DTC



The parking brake control module has detected an internal software malfunction.



Actions Taken When DTC Sets



C056E 41, C056E 5A



* The electric parking brake is disabled.



* A message and/or a warning indicator may be displayed.



C056E 42



* The electric parking brake functionality is degraded.



* A message and/or a warning indicator may be displayed.



Conditions for Clearing the DTC



* The parking brake control module clears the history DTC when a current DTC is not detected in 40 ignition cycles.



* The condition for the DTC is no longer present.



* The latest software and calibrations are programmed into the parking brake control module.



Reference Information



Schematic Reference



Park Brake System Schematics (See: Brakes and Traction Control/Parking Brake System/Diagrams/Electrical Diagrams)



Connector End View Reference



Component Connector End Views (See: Diagrams/Connector Views/Connector End Views By Name)



Description and Operation



Electronic Parking Brake Control Module Description (See: Brakes and Traction Control/Parking Brake System/Parking Brake Control



Module/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)