For 1990-2009 cars

### 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 C028D 00: Replace Park Brake Pad Malfunction

### 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 park brake when commanded by the electronic park brake 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 ON.

### Conditions for Setting the DTC

The parking brake control module detects a park brake pad malfunction.

### Action Taken When the DTC Sets

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 100 consecutive drive cycles.

• | Replace the park brake pads.

### Reference Information

#### Schematic Reference

Park Brake System Schematics

#### Connector End View Reference

Component Connector End Views

#### Description and Operation

Electronic Parking 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

Verify DTC C028D is not set.

⇒ | If DTC is set, replace the brake pad.

### Repair Instructions

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

Control Module References for parking brake control module replacement, setup, and programming.