This DTC is set when the vehicle accelerates and the brake pressure signal is high. The criteria to set this DTC is listed below
- The vehicle exceeds 40 km/h (25 mph).
- The vehicle accelerates at a rate of 8 km/h (5 mph) per second.
- The brake pressure sensor signal output is above 1034 kPa (150 psi).
Action Taken When the DTC Sets
If equipped, the following actions will occur
- The EBCM disables the vehicle stability enhancement system (VSES) for the duration of the ignition cycle.
- The EBCM disables the TCS for the duration of the ignition cycle.
- The Traction Control Off indicator turns ON.
- The driver information center (DIC) displays the Service Stability System and Service Traction System message.
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
The brake pressure sensor is mounted to the BPMV under the EBCM and cannot be diagnosed or replaced separately. If equipped, the brake pressure sensor 5-volt reference circuit and low reference circuit is shared with other components in the vehicle stability system. DTCs can set for other components that share circuits with the brake pressure sensor.
Test Description
The number below refers to the step number on the diagnostic table.
- 2: The EBCM supplies a 5-volt reference to several sensors. DTC C0870 is set if the 5-volt reference voltage is out of range.
| Step | Action | Yes | No |
|---|---|---|---|
| Schematic Reference: ABS Schematics Connector End View Reference: ABS Connector End Views and Computer/Integrating Systems Connector End Views in Computer/Integrating Systems | |||
| 1 | Did you perform the Diagnostic System Check - Vehicle? | Go to Step 2 | Go to Diagnostic System Check - Vehicle in Vehicle DTC Information |
| 2 | Are all the stop lamps always ON or one or more inoperative? | Go to SYMPTOMS - LIGHTING SYSTEMS in Lighting Systems | Go to Step 3 |
| 3 | Use Scan Tool to display DTCs for the BCM. Does Scan tool display DTC C0277 or C0278? | Go to DIAGNOSTIC CODE INDEX in Vehicle DTC Information | Go to Step 4 |
| 4 | Confirm that the brake pedal position (BPP) is adjusted to the correct position and perform the BPP calibration procedure. Refer to BRAKE PEDAL POSITION SENSOR CALIBRATION in Lighting Systems. Operate the vehicle within the Conditions for Running the DTC as specified in the supporting text. Does the DTC reset? | Go to Step 5 | Go to Step 6 |
| 5 | Repair open or short in the center high mounted stop lamp (CHMSL) resistor. Did you find and correct the condition? | Go to Step 6 | Go to Step 2 |
| 6 | Use the scan tool in order to clear the DTCs. Operate the vehicle within the Conditions for Running the DTC as specified in the supporting text. Does the DTC reset? | Go to Step 2 | System OK |
DTC C0131-C0139
Circuit Description
The body control module (BCM) receives a signal from the brake pedal position (BPP) sensor. The BCM illuminates the stop lamps by applying battery positive voltage to the stop lamp supply voltage circuit. The electronic brake control module (EBCM) receives a voltage input from the stop lamp supply voltage circuit to determine if the brake pedal is applied.
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