Diagnostic Instructions
DTC Descriptor
DTC C0131 00: ABS Pressure Circuit
Circuit/System Description
The electronic brake control module (EBCM) uses input from the brake pedal position sensor for more accurate control during a Vehicle Stability Enhancement System (VSES) event.
Conditions for Running the DTC
| • | System Voltage is above 9 volts. |
| • | The vehicle speed is greater than 40 km/h (24 mph). |
Conditions for Setting the DTC
| • | Voltage at the pressure sensor signal output to the EBCM falls outside the 0.25-4.75 voltage range for more than 100 milliseconds. |
| • | Brake signal does not correlate to pressure signal. |
| • | Signal is erratic and changes faster than physically allowed. |
Action Taken When the DTC Sets
If equipped, the following actions occur:
| • | The EBCM disables the ABS/traction control system (TCS)/VSES for the duration of the ignition cycle. |
| • | The Traction Control indicator illuminates. |
| • | The driver information center (DIC) displays Service Stability System. |
| • | The ABS indicator illuminates. |
| • | The stability OFF indicator turns does not illuminate. |
| • | The red BRAKE warning indicator could illuminate. |
Conditions for Clearing the DTC
| • | The condition for setting the DTC is no longer present. |
| • | The EBCM clears the history DTC when a current DTC is not detected in 100 consecutive drive cycles. |
Reference Information
Schematic Reference
Antilock Brake System Schematics
Connector End View Reference
Component Connector End Views
Description and Operation
ABS Description and Operation
Electrical Information Reference
Scan Tool Reference
Control Module References
for scan tool information
Circuit/System Verification
- Verify that DTC C0277, C0297, or B3445 is not set.
- Ignition ON, observe the scan tool BPP parameter while applying and releasing the brake pedal. The reading should change between Applied and Released.
| ⇒ | If the parameter does not change between applied and release, replace the BPMV and verify DTC does not reset. If DTC reset, replace the EBCM. |
Repair Instructions
Perform the
Diagnostic Repair Verification
after completing the diagnostic procedure.
