GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Chevrolet 🢒 2009 🢒 Impala 🢒 Power and Signal Distribution 🢒 Wiring Systems and Power Management 🢒 DTC C0131

Diagnostic Instructions
    • 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.

DTC Descriptors

DTC C0131 00: Antilock Brake System (ABS) Traction Control System (TCS) Pressure Circuit

Circuit/System Description

The electronic brake control module (EBCM) monitors the internal brake pressure sensor signal, and correlates the reading with brake pedal position parameter.

Conditions for Running the DTC
    • Ignition ON.
    •  System Voltage is above 9 volts.
    •  The vehicle speed is greater than 40 km/h (24 mph).

Conditions for Setting the DTC
    •  A short to voltage, a short to ground, or an open high resistance is detected with the internal brake pressure sensor.
    • Brake pedal signal does not correlate to brake pressure signal.
    • Signal is erratic.

Action Taken When the DTC Sets
    •  The EBCM disables the VSES for the duration of the ignition cycle.
    •  A DIC message and/or a warning indicator may be displayed.

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

    •  Circuit Testing
    •  Connector Repairs
    •  Testing for Intermittent Conditions and Poor Connections
    •  Wiring Repairs

Scan Tool Reference

Control Module References for scan tool information

Circuit/System Validation
  1. Verify that DTC C0277, B3445 or B3884 is not set.
    2. ⇒DTC is set, refer to Diagnostic Trouble Code (DTC) List - Vehicle.
  2. Ignition ON, observe the scan tool EBCM BPP Signal parameter. The reading should be Released and change between Applied and Released when pressing and releasing the brake pedal.
    3. ⇒If not within the specified value, perform the scan tool BCM BPP Sensor Calibration procedure. Refer to.
  3. Ignition ON, observe the scan tool EBCM Brake Pressure Sensor Input Voltage parameter. The reading should change when pressing and releasing the brake pedal.
    4. ⇒If not within the specified value, replace the EBCM.

Repair Instructions

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

Control Module References for EBCM replacement, setup, and programming