To the top of the document
Volt
   
GMDE Start Page Load static TOC Load dynamic TOC Help?

DTC C0574

Diagnostic Instructions

    • Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure.
    • Review Strategy Based Diagnosis for an overview of the diagnostic approach.
    • Diagnostic Procedure Instructions provide an overview of each diagnostic category.

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

    •  Circuit Testing
    •  Connector Repairs
    •  Testing for Intermittent Conditions and Poor Connections
    •  Wiring Repairs

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.

  1. Allow the hand brake control module to cool down for 15 minutes.
  2. Verify DTC C0574 54 is not set.
  3. If DTC is set, replace the K83 Hand brake Control Module.

Repair Instructions

Perform the Diagnostic Repair Verification

    •  Electronic Hand brake Control Module Replacement
    •  Control Module References
   


&#169© Copyright Chevrolet. All rights reserved