Circuit/System Verification

NOTE:

A reprogrammed Body Control Module will set this DTC if the Brake Pedal Position Sensor is not learned (Perform the BCM Brake Pedal Position Sensor Learn).

Ignition ON.
Verify the Body Control Module Brake Pedal Position Sensor Learned Released Position parameter is Yes.
- If the parameter is not Yes .
  Refer to Brake Pedal Position Sensor Calibration .
- If the parameter is Yes
Verify that DTC C0277 or C0278 is not set.
- If either DTC is set
  Refer to Diagnostic Trouble Code (DTC) List - Vehicle .
- If either DTC is not set
Verify the Brake Pedal Position Sensor or the brake pedal are not binding causing residual brake pressure to be detected.
- If a condition is found
  Repair or replace the applicable component.
- If a condition is not found
Verify the scan tool Electronic Brake Control Module Brake Pedal Position Sensor parameter changes between Active and Inactive when applying and releasing the brake pedal.
- If the parameter does not change
  Refer to Symptoms - Lighting .
- If the parameter changes
Replace the Q5 Brake Pressure Modulator.
Verify the DTC does not set while operating the vehicle within the Conditions for Running the DTC.
- If the DTC sets
  Replace the K17 Electronic Brake Control Module.
- If the DTC does not set
All OK.