• | 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 provides an overview of each diagnostic category. |
The brake pedal position (BPP) sensor is an input to the body control module (BCM). The BCM then sends a serial data message to the electronic brake control module (EBCM) and other electronic control modules. The BPP sensor is a potentiometer type sensor with a 5-volt reference circuit and a low reference circuit. The IPM supplies the 5-volt reference to the BPP.
• | The ignition is ON. |
• | The vehicle speed is greater than 16 km/h (10 mph). |
• | The ignition voltage is greater than 8 volts. |
• | The brake pedal is sensed as applied during moderate to high vehicle acceleration. |
• | With the vehicle decelerating, the brake pedal is sensed as released and the master cylinder pressure is greater than 90 psi. |
• | The EBCM disables the Traction Control System (TCS) and Vehicle Stability Enhancement System (VSES) for the duration of the ignition cycle. |
• | A DIC message and/or a warning message may be displayed. |
• | The Antilock Brake System (ABS) remains functional. |
• | The condition for the DTC is no longer present and the DTC is cleared with a scan tool. |
• | The EBCM automatically clears the history DTC when a current DTC is not detected in 100 consecutive drive cycles. |
The DTC C0161 00 can be set if the vehicle has been driven with the brake applied during acceleration.
Antilock Brake System Schematics
With the ignition ON, use a scan tool to display DTCs for the body control module (BCM).
⇒ | If DTC C0277 is present, refer to Diagnostic Trouble Code (DTC) List - Vehicle. |
⇒ | If no DTCs are present, go to Diagnostic Aids. |
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.