DTC C028A
Diagnostic Instructions
DTC Descriptors
| DTC C028A 01: Park Brake Motor Circuit Short
to Battery |
| DTC C028A 02: Park Brake Motor Circuit Short
to Ground |
| DTC C028A 04: Park Brake Motor Circuit Open
Circuit |
| DTC C028A 08: Park Brake Motor Circuit
Performance-Signal Invalid |
| DTC C028A 28: Park Brake Motor Circuit
Performance-Incorrect Frequency |
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 parking brake when commanded by the 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. The parking brake control module
will also diagnose the internal park brake motor circuit to verify
it is functioning properly. The park brake motor circuit is used to
command motor operation, apply and release tension on the parking
brake cable, which will apply and release the parking brake.
The park brake will self diagnose the internal Park Brake Motor
Circuit. This circuit is used to drive the motor, which pulls on
the park brake cable, ultimately applying and releasing the park
brake.
Conditions for Running the DTC
| • |
Ignition OFF, ACCESSORY, or
RUN mode. |
| • |
Battery voltage is between 9
-16V |
Conditions for Setting the DTC
The parking brake control module detects an internal motor
malfunction.
Action Taken When the DTC Sets
| • |
The electric parking brake is
disabled. |
| • |
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
40 ignition cycles. |
| • |
The condition for the DTC is
no longer present. |
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
Scan Tool Reference
Control Module References for scan tool information
Circuit/System Verification
Verify that DTC C028A is not set.
If DTC is set, program the parking brake control module. If the DTC
resets, replace the K83 Parking Brake Control Module.
Repair Instructions
Perform the
Diagnostic Repair Verification
|
