Circuit/System Verification

Verify that DTC C0277 or C0278 is not set.
- If any of the DTCs are set, refer to Diagnostic Trouble Code (DTC) List - Vehicle .
Ignition ON, observe the scan tool EBCM BPP Signal parameter. The parameter should be Released when the brake pedal is not applied, and change to Applied when the brake pedal is applied.
- If the parameter does not change between applied and released, perform the Brake Pressure Modulator Valve Pressure Sensor Calibration .
Replace the brake pressure modulator valve assembly.