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 C0298 00: Park Brake Unlatch Switch Circuit MalfunctionCircuit/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
The electric parking brake control module detects the apply or release button was activated for more than 90 seconds.
Action Taken When the DTC Sets
A message and/or a warning indicator may be displayed.
Conditions for Clearing the DTC
| • | The electric parking brake control module clears the history DTC when a current DTC is not detected in 40 ignition cycles. |
| • | The condition for the DTC is no longer present. |
| • | The electric parking brake switch button is released using the scan tool. |
Diagnostic Aids
Check if the electric parking brake switch is stuck in the apply or release position which may cause the DTC to set.
Reference Information
Schematic Reference
Connector End View Reference
Description and Operation
Electronic Parking Brake Control Module Description
Electrical Information Reference
Scan Tool Reference
Control Module References for scan tool information
Circuit/System Verification
- Verify DTC C0293 is not set.
- Command the Park Brake Switch to Released with a scan tool. The BRAKE light should turn off and the Park Brake Status on the scan tool should display Released.
| ⇒ | If DTC C0293 is set, refer to DTC C0293. |
| ⇒ | If the BRAKE light does not turn off or the Park Brake Status does not display Released replace the S91 Electric Parking Brake Switch. |
Repair Instructions
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.
Control Module References for electric parking brake control module replacement, setup, and programming
