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Home >> Chevrolet >> 2017 >> Bolt EV Premier >> Repair and Diagnosis >> Brakes >> Traction Control >> Antilock Brake System >> Repair Instructions >> Electronic Brake Control Module with Brake Pressure Modulator Valve Replacement >> Removal Procedure

Removal Procedure

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.

WARNING:

Always perform the High Voltage Disabling procedure prior to servicing any High Voltage component or connection. Personal Protection Equipment (PPE) and proper procedures must be followed.

The High Voltage Disabling procedure includes the following steps:

  • Identify how to disable high voltage.
  • Identify how to test for the presence of high voltage.
  • Identify condition under which high voltage is always present and personal protection equipment (PPE) and proper procedures must be followed.

Before working on any high voltage system, be sure to wear the following Personal Protection Equipment:

  • Safety glasses with appropriate side shields when within 15 meters (50 feet) of the vehicle, either indoors or outdoors.
  • Certified and up-to-date Class "0" Insulation gloves rated at 1000V with leather protectors.
    • Visually and functionally inspect the gloves before use.
    • Wear the Insulation gloves with leather protectors at all times when working with the high voltage battery assembly, whether the system is energized or not.

Failure to follow the procedures may result in serious injury or death.

  1. Disable the high voltage system. High Voltage Disabling
  2. Remove the radiator surge tank bolts and reposition the heater surge tank from the heater surge tank bracket with the hoses connected. Heater Coolant Surge Tank Replacement
  3. Fig 1: Drive Motor Battery Positive and Negative Cable
    GM4529636Courtesy of GENERAL MOTORS COMPANY
  4. Remove Drive Motor Battery Positive and Negative Cable (1)Drive Motor Battery Positive and Negative Cable Replacement
  5. Fig 2: Brake Pressure Modulator Valve Front Pipe Fitting
    GM4514614Courtesy of GENERAL MOTORS COMPANY
    NOTE:

    Cap the brake pipe fittings to prevent brake fluid loss and contamination.

  6. Remove Brake Pressure Modulator Valve Front Pipe Fitting (1) @Brake Pressure Modulator Valve (3)
  7. Remove Brake Pressure Modulator Valve Rear Pipe Fitting (2) @Brake Pressure Modulator Valve (3)
  8. Fig 3: Brake Pressure Modulator Valve And Brake Pipe Fitting
    GM4514615Courtesy of GENERAL MOTORS COMPANY
    NOTE:

    Cap the brake pipe fittings to prevent brake fluid loss and contamination.

  9. Remove Brake Pipe Fitting (1) @Brake Pressure Modulator Valve (2)
  10. Fig 4: Electrical Connector And Electronic Brake Control Module
    GM4625990Courtesy of GENERAL MOTORS COMPANY
  11. Disconnect Electrical Connector (1) @Electronic Brake Control Module (2)
  12. Remove Body Wiring Harness Clip (3) @Brake Pressure Modulator Valve Bracket
  13. Fig 5: Brake Pressure Modulator Valve Bracket Nut
    GM4514617Courtesy of GENERAL MOTORS COMPANY
  14. Remove Brake Pressure Modulator Valve Bracket Nut (1) @Front Wheel House Panel
  15. Fig 6: Body Wiring Harness Clip And Electronic Brake Control Module Stud Bolt
    GM4514618Courtesy of GENERAL MOTORS COMPANY
  16. Remove Body Wiring Harness Clip (1) @Electronic Brake Control Module Stud Bolt (2)
  17. Fig 7: Brake Pressure Modulator Valve Bracket Nut
    GM4514619Courtesy of GENERAL MOTORS COMPANY
  18. Remove Brake Pressure Modulator Valve Bracket Nut (1) @Front Compartment Inner Side Rail
  19. Remove Electronic Brake Control Module with Brake Pressure Modulator Valve and Bracket Assembly (2) @Vehicle
  20. Fig 8: Brake Pressure Modulator Valve Insulator Nut
    GM4625988Courtesy of GENERAL MOTORS COMPANY
  21. Remove Brake Pressure Modulator Valve Insulator Nut (1) and DISCARD
  22. Remove Brake Pressure Modulator Valve Insulator Washer (2) and DISCARD
  23. Fig 9: Electronic Brake Control Module with Brake Pressure Modulator Valve
    GM4625989Courtesy of GENERAL MOTORS COMPANY
  24. Remove Electronic Brake Control Module with Brake Pressure Modulator Valve (1) @Brake Pressure Modulator Valve Bracket
  25. Remove Brake Pressure Modulator Valve Insulator (2) and DISCARD