Chevrolet Repair Questions? Ask a Chevy Mechanic for Answers ASAP
hello, my name is ***** ***** I will be glad to assist you. please allow me a couple of minutes to gather some basic info.Roy
what is the gross vehicle weight???
first, how did you determine the module was bad???
the code indicates a wire harness issue not a component issue.
what was the part number of the module they gave you???
info for you to read. it sounds like they shot from the hip instead of doing a real diagnostic
Diagnostic Instructions* Perform the Diagnostic System Check - Vehicle See: Vehicle > Initial Inspection and Diagnostic Overview > Diagnostic System Check - Vehicle prior to using this diagnostic procedure.* Review Strategy Based Diagnosis See: Vehicle > Initial Inspection and Diagnostic Overview > Strategy Based Diagnosis for an overview of the diagnostic approach.* Diagnostic Procedure Instructions See: Vehicle > Initial Inspection and Diagnostic Overview > Diagnostic Procedure Instructions provides an overview of each diagnostic category.DTC DescriptorsDTC C0131 01 - ABS Pressure Circuit Short to BatteryDTC C0131 06 - ABS Pressure Circuit Short to Ground or OpenDTC C0131 55 - ABS Pressure Circuit Expected Number of Transition/Events ExceededDTC C0131 5A - ABS Pressure Circuit Plausibility FailureDTC C0131 0F - ABS Pressure Circuit ErraticCircuit/System DescriptionThe body control module (BCM) sends a serial data message when the brake pedal is applied. The electronic brake control module (EBCM) compares the brake pressure sensor values to ensure they agree with the brake pedal applied signal.Conditions for Running the DTCIgnition ON.Conditions for Setting the DTC* Brake signal does not correlate to pressure signal.* Signal is erratic and changes faster than physically allowed.Action Taken When the DTC Sets* The Traction Control indicator turns ON.* The driver information center displays the Service Stability System message.Conditions for Clearing the DTCThe EBCM clears the history DTC when a current DTC is not detected in*****cycles.Diagnostic Aids* DTC C0131 5A can set if the brake is applied while accelerating.* This DTC may set during off road driving in sand or hilly terrain.* Anything that may cause the vehicle to decelerate without the brake pedal being applied.* The electric trailer brake is applied without the brake pedal being applied.* Inform the customer that this DTC will set if the brake is applied for 60 seconds while at speeds greater than 21 km/h (13 mph), such as a two footed driving.Reference InformationSchematic ReferenceAntilock Brake System Schematics See: Antilock Brakes / Traction Control Systems > Electrical > Antilock Brake System SchematicsConnector End View ReferenceComponent Connector End Views See: Vehicle > Connector Views > 1-2 Shift Solenoid (SS) Valve (M30)Description and OperationABS Description and Operation (Without JL4) See: Antilock Brakes / Traction Control Systems > Components > Antilock Brake System DescriptionABS Description and Operation (With JL4) See: Antilock Brakes / Traction Control Systems > Components > Antilock Brake System DescriptionElectrical Information Reference* Circuit Testing See: Vehicle > Component Tests and General Diagnostics > Circuit Testing* Connector Repairs See: Vehicle > Component Tests and General Diagnostics > Connector Repairs* Testing for Intermittent Conditions and Poor Connections See: Vehicle > Component Tests and General Diagnostics > Testing for Intermittent Conditions and Poor Connections* Wiring Repairs See: Vehicle > Component Tests and General Diagnostics > Wiring RepairsScan Tool ReferenceControl Module References See: Vehicle > Programming and Relearning > Control Module References for scan tool informationCircuit/System Testing1. Apply and release brake pedal. Verify brake lamps operate properly.♦ If brake lamps do not operate properly, refer to Symptoms - Lighting See: Lighting and Horns > Symptom Related Diagnostic Procedures > Symptoms - Lighting.2. Replace the brake pressure modulator valve and verify the DTC does not reset.♦ If the DTC resets, replace the EBCM.Repair InstructionsPerform the Diagnostic Repair Verification See: A L L Diagnostic Trouble Codes ( DTC ) > Verification Tests > Diagnostic Repair Verification after completing the diagnostic procedure.* Brake Pressure Modulator Valve Replacement (Without JL4) See: Hydraulic Control Assembly - Antilock Brakes > Removal and Replacement > Brake Pressure Modulator Valve Replacement (Without JL4)Brake Pressure Modulator Valve Replacement (With JL4) See: Hydraulic Control Assembly - Antilock Brakes > Removal and Replacement > Brake Pressure Modulator Valve Replacement (With JL4)* Control Module References See: Vehicle > Programming and Relearning > Control Module References for EBCM replacement, programming and setup
wire diagrams. check both fuses listed for power on both sides.
do you have the old abs module???
ok, the part number is *****
options, did you have trac control and stability???
ok, let me check
what was the original code before replacing the moduleare any lights on at the dash???
the module does not match up to trac and stability.
I would call this guy back and have him find the old abs module. have him verify the numbers. it looks like he may have installed the wrong module.
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