DTC C028B
Diagnostic Instructions
DTC Descriptors
DTC C028B 08: Park Brake Motor Position Sensor Signal Performance-Signal Invalid
DTC C028B 26: Park Brake Motor Position Sensor Signal Low Frequency
DTC C028B 29: Park Brake Motor Position Sensor Signal Too Few Pulses
DTC C028B 2A: Park Brake Motor Position Sensor Signal Too Many Pulses
Circuit/System Description
The parking brake control module has an internal motor, apply actuator, release actuator, and temperature sensor. The handbrake control module also contains the logic for applying and releasing the handbrake when commanded by the handbrake 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 handbrake control module also contains an internal handbrake motor position sensor which monitors the handbrake motor position.
The Handbrake Motor Position Sensor is an internal sensor to the handbrake control module, this sensor is used to monitor the handbrake motor position.
Conditions for Running the DTC
Ignition OFF, ACCESSORY, or RUN mode.
Conditions for Setting the DTC
The handbrake control module detects an internal motor position sensor signal malfunction.
Action Taken When the DTC Sets
| • | The electric handbrake is disabled, one release allowed. |
| • | A message and/or a warning indicator may be displayed. |
Conditions for Clearing the DTC
| • | The handbrake control module clears the history DTC when a current DTC is not detected in 40 ignition cycles. |
| • | Calibrate the handbrake control module. |
Reference Information
Schematic Reference
Park Brake System Schematics
Connector End View Reference
Component Connector End Views
Description and Operation
Electronic Handbrake Control Module Description
Electrical Information Reference
Scan Tool Reference
Control Module References for scan tool information
Circuit/System Verification
Verify DTC C028B is not set.
| ⇒ | If DTC is set, perform the Handbrake Calibration procedure in Configuration/Reset Functions. If the DTC resets replace the K83 Parking Brake Control Module. |
Repair Instructions
Perform the Diagnostic Repair Verification
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