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HOMESERVICE MANUALSCHEVROLET2008CHEVY EXPRESS G2500, VAN CARGO, 6.6 6REPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 366 (ANTILOCK BRAKE SYSTEM AND TRACTION CONTROL SYSTEM)DIAGNOSTIC INFORMATION AND PROCEDURESDTC C0201: ANTILOCK BRAKE SYSTEM (ABS) ENABLE RELAY CONTACT CIRCUITTEST DESCRIPTION
2008 Chevrolet Chevy Express G2500, Van Cargo, 6.6 6

Test Description

2008 Chevrolet Chevy Express G2500, Van Cargo, 6.6 6SECTION Test Description
WARNING: This page is about a different car, the 2004 GMC Sierra, 2004 GMC Cab & Chassis Sierra, 2004 Chevrolet Silverado, and 2004 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.

The number below refers to the step number on the diagnostic table.

  1. 3:  A shorted ABS pump motor may damage the contacts within the system relay. It is imperative that the steps in the table be followed to prevent damage to a replacement EBCM.
DTC C0201

Step Action Values Yes No
Schematic Reference:  ABS Schematics  
1 Did you perform the ABS Diagnostic System Check? - Go to Step 2  Go to Diagnostic System Check - ABS 
2
  1. Use a scan tool in order to clear the DTCs.
  2. Use the scan tool in order to perform an ABS Function Test.
Does the DTC set?		 - Go to Step 3  Go to Diagnostic Aids
3 
  1. Separate the EBCM from the BPMV. Refer to Electronic Brake Control Module Replacement .
  2. Use a DMM in order to measure the resistance across the ABS pump motor.
Does the resistance measure within the specified range?		 0.3-1.0 Ω Go to Step 4  Go to Step 6 
4 Use a DMM in order to measure the resistance between the high side of the pump motor and a good ground.
Does the resistance measure less than the specified value?		 0L Go to Step 6  Go to Step 5 
5
IMPORTANT: Following EBCM replacement, use the scan tool to perform the Tire Size Calibration procedure.
Replace the EBCM. Refer to Electronic Brake Control Module Replacement .Did you complete the replacement?		 - Go to Step 7  -
6
IMPORTANT: Following EBCM replacement, use the scan tool to perform the Tire Size Calibration procedure.
Replace the EBCM and the BPMV. Refer to Electronic Brake Control Module Replacement  and Brake Pressure Modulator Valve (BPMV) Replacement .Did you complete the replacements?		 - Go to Step 7  -
7
  1. Use the scan tool in order to clear the DTCs.
  2. Operate the vehicle within the Conditions for Running the DTC as specified in the supporting text.
Does the DTC reset?		 - Go to Step 3  System OK
RENDER: 1.0x

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.