C028D

DTC C028D

Diagnostic Instructions

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

DTC Descriptors
DTC C028D 00
- Replace Park Brake Pad Malfunction

Circuit/System Description

The electric parking brake module has an internal motor, apply actuator, release actuator, and temperature sensor. The electric parking brake module also contains the logic for applying and releasing the park brake when commanded by the electric parking brake switch. When the electric parking brake module receives a signal from the switch, the internal circuit board temperature is checked to verify it is within operating range before the module performs the requested operation.

Conditions for Running the DTC

Ignition OFF, ACCESSORY, or RUN mode.

Conditions for Setting the DTC

The electric parking brake module has an internal counter which keeps track of dynamic applies. When the counter reaches the threshold value this DTC will set.

Action Taken When the DTC Sets

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

Conditions for Clearing the DTC

* The electric parking brake module clears the history DTC when a current DTC is not detected in 40 consecutive drive cycles.
* Adjust or replace the park brake pads.

Reference Information
Schematic Reference

Park Brake System Schematics [1][2]Electrical Diagrams
Connector End View Reference

Component Connector End Views Connector Views
Description and Operation

Electronic Parking Brake Control Module Description Description and Operation
Electrical Information Reference

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

Scan Tool Reference

Control Module References Control Module References for scan tool information

Circuit/System Verification

Verify DTC C028D is not set.

If DTC is set, replace the brake pads and perform the Parking Brake Shoe Service Reset procedure.

Repair Instructions

Perform the Diagnostic Repair Verification Verification Tests after completing the diagnostic procedure.

Control Module References Control Module References for Electric Parking Brake Module replacement, setup, and programming.