2010 Cadillac CTS Sedan AWD V6-3.6L Page 730
DTC C0574 02
- Circuit Board Temperature Sensor Short to Ground
DTC C0574 54
- Circuit Board Temperature Sensor High
Circuit/System Description
The electric parking brake control module has an internal motor, apply actuator, release actuator, and temperature sensor. The electric parking brake
control module also contains the logic for applying and releasing the parking brake when commanded by the electric parking brake switch. When
the electric 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
C0574 01, C0574 02
The electric parking brake module detects a short to battery or a short to ground.
C0574 54
The electric parking brake module detects an internal temperature that is above the allowed value.
Action Taken When the DTC Sets
* A message and/or a warning indicator may be displayed.
* The electric parking brake is disabled, one release allowed.
Conditions for Clearing the DTC
* The electric parking brake module clears the history DTC when a current DTC is not detected in 40 ignition cycles.
* The electric parking brake module is replaced or the internal temperature drops below the allowed temperature.
Diagnostic Aids
Check for debris on the electric parking brake module which may cause the module to overheat.
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)
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/Circuit Testing/Circuit Testing)
* Connector Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/Connector Repairs/Connector Repairs)
* Testing for Intermittent Conditions and Poor Connections (See: Testing and Inspection/Component Tests and General Diagnostics/Circuit
Testing/Testing for Intermittent Conditions and Poor Connections)
* Wiring Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/Wiring Repairs/Wiring Repairs)
Scan Tool Reference
Control Module References (See: Testing and Inspection/Programming and Relearning) for scan tool information
Circuit/System Verification
C0574 01 or C0574 02
Remove the EPB fuse and reinstall. Verify DTC C0574 is not set.
