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Home >> Chevrolet >> 2011 >> Volt >> Repair and Diagnosis >> Brakes >> Traction Control >> Antilock Brake System >> Repair Instructions >> Electronic Brake Control Module Replacement >> Removal Procedure
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Removal Procedure

WARNING: Refer to Brake Fluid Irritant Warning .
CAUTION: Refer to Brake Fluid Effects on Paint and Electrical Components Caution .
CAUTION: Always connect or disconnect the wiring harness connector from the EBCM/EBTCM with the ignition switch in the OFF position. Failure to observe this precaution could result in damage to the EBCM/EBTCM.
    NOTE: The transmission must be in the PARK position, the power button in the OFF position, and the brakes not applied to ensure the brake modulator and high pressure accumulator (HPA) pressure relief occurs. This process will take approximately 1 to 3 minutes.
  1. Place the transmission in PARK.
  2. Place the power button in the OFF position.
  3. Remove the remote keyless entry (RKE) transmitter and close all of the vehicle doors.
  4. Wait approximately 3 minutes for the HPA pressure relief to occur.
    5. WARNING: Do not use a service jack to lift this vehicle. Lifting the vehicle with a jack could cause the vehicle to slip off the jack and roll; this could cause injury or death.
  5. Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle .
  6. Disconnect the electronic brake control module (EBCM) electrical connector.
    7. Fig 1: Brake Pressure Modulator Valve (BPMV) Bracket And Bolt
    GM2375835Courtesy of GENERAL MOTORS CORP.
  7. Remove the brake pressure modulator valve (BPMV) bracket bolt (1).
  8. Lower the vehicle.
  9. Without disconnecting the connectors, remove the fasteners and position the drive motor generator power inverter module aside. Refer to Drive Motor Generator Power Inverter Module Replacement .
  10. Remove the bolt and position aside the accessory wiring junction block. Refer to Accessory Wiring Junction Block Replacement .
    11. Fig 2: BPMV Return Hose Quick Connect
    GM2375837Courtesy of GENERAL MOTORS CORP.
  11. Disconnect the BPMV return hose quick connect (1).
  12. Cap the BPMV outlet port and plug the return hose to prevent brake fluid loss and contamination.
    13. Fig 3: BPMV Supply Hose Quick Connect
    GM2375838Courtesy of GENERAL MOTORS CORP.
  13. Disconnect the BPMV supply hose quick connect (1).
  14. Cap the BPMV inlet port and plug the supply hose to prevent brake fluid loss and contamination.
    15. Fig 4: Right Rear And Left Rear Brake Pipe Fittings At BPMV
    GM2375839Courtesy of GENERAL MOTORS CORP.
    NOTE: Mark the location of the brake pipe fittings at the BPMV to ensure correct installation.
  15. Disconnect the right rear (1) and left rear (2) brake pipe fittings from the BPMV.
  16. Cap the brake pipe fittings and the BPMV outlet ports to prevent brake fluid loss and contamination.
    17. Fig 5: Left Front And Right Front Secondary Brake Pipe Fittings At BPMV
    GM2375841Courtesy of GENERAL MOTORS CORP.
    NOTE: Mark the location of the brake pipe fittings at the BPMV to ensure correct installation.
  17. Disconnect the left front (1) and right front (2) secondary brake pipe fittings from the BPMV.
  18. Cap the brake pipe fittings and the BPMV outlet ports to prevent brake fluid loss and contamination.
    19. Fig 6: Master Cylinder Primary Brake Pipe Fitting
    GM2375842Courtesy of GENERAL MOTORS CORP.
  19. Disconnect the master cylinder primary brake pipe fitting (1).
  20. Cap the brake pipe fitting and the BPMV inlet port to prevent brake fluid loss and contamination.
    21. Fig 7: BPMV Bracket Nut
    GM2375845Courtesy of GENERAL MOTORS CORP.
  21. Remove the BPMV bracket nut (1).
    22. Fig 8: BPMV Bracket Bolt
    GM2375846Courtesy of GENERAL MOTORS CORP.
  22. Remove the BPMV bracket bolt (1).
  23. Remove the brake master cylinder. Refer to Master Cylinder Replacement .
  24. Carefully move the front brake pipes and remove the hydraulic control unit and bracket assembly.
    25. Fig 9: EBCM And Bolts
    GM2375848Courtesy of GENERAL MOTORS CORP.
  25. Remove the EBCM bolts (1).
    26. Fig 10: EBCM And Seal
    GM2375849Courtesy of GENERAL MOTORS CORP.
    NOTE: Do not pry the EBCM from the BPMV. The EBCM must be pulled back evenly.
  26. Carefully separate the EBCM (1) and seal (2) from the BPMV. Do not pry or force the components apart.
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