DTC C0574
Diagnostic Instructions
DTC Descriptors
DTC C0574 01: Circuit Board Temperature Sensor Short to Battery
DTC C0574 02: Circuit Board Temperature Sensor Short to Ground
DTC C0574 54: Circuit Board Temperature Sensor High
Circuit/System Description
The hand brake control module has an internal motor, apply actuator, release actuator, and temperature sensor. The hand brake control module also contains the logic for applying and releasing the hand brake when commanded by the hand brake control switch. When the hand 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 hand brake control module detects a short-circuit to battery or a short-circuit to ground.
C0574 54
The hand brake control module has detected 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 hand brake is disabled, one release allowed. |
Conditions for Clearing the DTC
| • | The hand brake control module clears the history DTC when a current DTC is not detected in 40 ignition cycles. |
| • | The hand brake control module is replaced or the internal temperature drops below the allowed temperature. |
Diagnostic Aids
Check for debris on the hand brake control module which may cause the module to overheat.
Reference Information
Schematic Reference
Hand brake System Schematics
Connector End View Reference
Component Connector End Views
Description and Operation
Electronic Hand brake Control Module Description
Electrical Information Reference
Scan Tool Reference
Control Module References for scan tool information
Circuit/System Verification
C0574 01 or C0574 02
Remove the EHB fuse and reinstall. Verify DTC C0574 is not set.
| ⇒ | If DTC is set, replace the K83 Hand brake Control Module. |
C0574 54
Note: Diagnose all other hand brake control module system related faults before performing this diagnostic. Other faults may cause the circuit board to overheat. Do not attempt to apply the electric hand brake.
- Allow the hand brake control module to cool down for 15 minutes.
- Verify DTC C0574 54 is not set.
| ⇒ | If DTC is set, replace the K83 Hand brake Control Module. |
Repair Instructions
Perform the Diagnostic Repair Verification
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