Chevrolet Silverado / GMC Sierra. Manual — part 710

Connector End View Reference

Component Connector End Views

Description and Operation

ABS Description and Operation (With JL4) or ABS Description and Operation (Without
JL4)

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 Testing

1. Ignition OFF, disconnect the EBCM harness connector and connect a test lamp between the

battery positive voltage circuit terminal going to the ABS pump motor, and to ground.

2. Ignition ON, verify that the test lamp illuminates.

If the test lamp does not illuminate, repair the open or high resistance in the battery
positive voltage circuit.

3. Connect a test lamp between the battery positive voltage circuit and pump motor ground

circuit at the EBCM connector, verify that the test lamp illuminates.

If the test lamp does not illuminate, repair the open or high resistance in the pump
motor ground circuit.

4. Ignition OFF, remove the EBCM from the BPMV.

5. Inspect the EBCM to BPMV connector for conditions such as damage, corrosion, or

presence of brake fluid.

If connector corrosion or damage is evident, replace BPMV and/or EBCM as
necessary.

If brake fluid is present, replace both BPMV and EBCM.

6. Connect the EBCM harness to the EBCM with the BPMV still separated.

2008 Chevrolet Silverado 1500

2008 BRAKES Antilock Brake System - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra & Silverado

7. Connect a test lamp between the pump motor circuits, internal EBCM side.

8. Ignition ON, use the scan tool to perform the Pump Motor Test.

If test lamp illuminates replace the BPMV.

If test lamp does not illuminate replace the EBCM.

Repair Procedures

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

Brake Pressure Modulator Valve Replacement (JD9, JF3, JF7) or Brake Pressure
Modulator Valve Replacement (JH6, JH7)

Control Module References for EBCM replacement, setup, and programming

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

ABS/TCS System Pressure Circuit Malfunction

DTC C0131 3A

ABS/TCS Pressure Sensor Incorrect Component Installed

DTC C0131 5A

ABS/TCS Pressure Circuit Plausibility Failure

DTC C0131 01

ABS Pressure Circuit Short to Battery

DTC C0131 03

2008 Chevrolet Silverado 1500

2008 BRAKES Antilock Brake System - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra & Silverado

ABS/TCS Pressure Circuit Voltage Below Threshold

DTC C0131 06

ABS/TCS Pressure Circuit Short to Ground or Open

DTC C0131 55

ABS/TCS Pressure Sensor Expected Number of Transitions or Events not Reached

DTC C0131 0F

ABS/TCS Pressure Sensor Erratic

DTC C0131 4B

ABS/TCS Pressure Sensor Calibration not Learned

Diagnostic Fault Information

Circuit/System Description

The electronic brake control module (EBCM) uses input from the brake pressure sensor for more
accurate control during a vehicle stability enhancement system (VSES) event.

Conditions for Running the DTC

The ignition switch is in the ON position.

Ignition voltage is greater than 9.5 volts.

Conditions for Setting the DTC

Internal pressure sensor line fault.

Pressure signal does not correlate to estimated Pressure over time.

Brake Signal does not correlate to Pressure Signal.

Signal is erratic and changes faster than physically allowed.

Circuit

Short to

Ground

Open/High

Resistance

Short to

Voltage

Signal

Performance

Brake Pressure Sensor Signal
Circuit

C0131 03

C0131 00

C0131 01

C0131 3A,

5A, OF, 4B

2008 Chevrolet Silverado 1500

2008 BRAKES Antilock Brake System - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra & Silverado

Action Taken When the DTC Sets

The EBCM disables the antilock brake system (ABS)/traction control system/(TCS) and
vehicle stability enhancement system/(VSES) for the duration of the ignition cycle.

The ABS/TCS and stabilitrak indicator turns ON.

The Service Traction Control, and stabilitrak displayed on the DIC.

Conditions for Clearing the DTC

The condition for the DTC is no longer present.

The EBCM automatically clears the history DTC when a current DTC is not detected in 100
consecutive drive cycles.

Diagnostic Aids

The brake fluid pressure sensor is integral to the BPMV/EBCM. The brake fluid pressure sensor
is not serviceable. After replacing a BPMV and the DTC resets as a current code, it may be
necessary to perform a brake pressure sensor calibration with the Tech 2 in ABS, special
function.

Reference Information

Schematic Reference

Antilock Brake System Schematics

Connector End View Reference

Component Connector End Views

Description and Operation

ABS Description and Operation (With JL4) or ABS Description and Operation (Without
JL4)

Electrical Information Reference

Circuit Testing

Connector Repairs

Testing for Intermittent Conditions and Poor Connections

Wiring Repairs

2008 Chevrolet Silverado 1500

2008 BRAKES Antilock Brake System - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra & Silverado