C0163
DTC C0163-C0165
Circuit Description
The brake pedal position sensor (BPP) is an input to the electronic brake control module (EBCM). The brake pedal position sensor is a potentiometer type sensor with a 5 volt reference circuit and a low reference circuit. The BCM supplies the 5-volt reference to the BPP.
DTC Descriptors
This diagnostic procedure supports the following DTCs:
* DTC C0163 Antilock Brake System (ABS)/Traction Control System (TCS) Brake Switch/Sensor Circuit Low
* DTC C0164 Antilock Brake System (ABS)/Traction Control System (TCS) Brake Switch/Sensor Circuit High
* DTC C0165 Antilock Brake System (ABS)/Traction Control System (TCS) Brake Switch/Sensor Circuit Open
Conditions for Running the DTC
DTC C0163
The ignition is ON.
DTC C0164
The vehicle speed is greater than 40 km/h (25 mph).
Conditions for Setting the DTC
DTC C0163
The brake pedal position sensor input voltage is between 1.87 volts and 5.03 volts for 2 seconds.
DTC C0164
The brake pedal position sensor input was active for 2 consecutive ignition cycles.
Action Taken When the DTC Sets
If equipped, the following actions occur:
* The EBCM disables the TCS/VSES for the duration of the ignition cycle.
* The Traction Control and Active Handling indicator turns ON.
* The DIC displays the following messages:
- Service Traction System
- Service Active Handling
* The ABS remains functional.
Conditions for Clearing the DTC
* 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.
Diagnostic Aids
DTC C0163
Possible causes of this DTC are the following conditions:
* A signal circuit of the brake pedal position sensor is open.
* The BPP sensor needs calibration.
* All brake lamps are open.
* All brake lamp grounds are open.
* An internal EBCM problem.
DTC C0164
Possible causes of this DTC are the following conditions:
* The brake pedal position sensor circuit is shorted to voltage.
* The brake pedal position sensor is misadjusted.
* The brake pedal position sensor is stuck closed.
* A brake pedal that is binding.
Test Description
The number below refers to the step number on the diagnostic table.
2. Test for the current state of the BPP sensor.
