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Home >> Toyota >> 2019 >> Mirai >> Repair and Diagnosis >> Brakes >> Mechanical - Hydraulic >> Brake System (Hydraulic) - Service Information >> Brake Booster Pump >> Removal [06/2015 - 11/2018] >> Procedure

Removal [06/2015 - 11/2018]: Procedure

  1. PRECAUTION 
    NOTE:

    After turning the power switch off, waiting time may be required before disconnecting the cable from the negative (-) auxiliary battery terminal. Therefore, make sure to read the disconnecting the cable from the negative (-) auxiliary battery terminal notices before proceeding with work.

    Refer to PRECAUTION [06/2015 - ]

  2. REMOVE BRAKE BOOSTER WITH MASTER CYLINDER ASSEMBLY 

    Refer to REMOVAL [06/2015 - 11/2018] 

  3. REMOVE WIRING HARNESS CLAMP BRACKET 
    1. Remove the bolt, nut and wire harness clamp bracket from the brake booster pump with bracket assembly.
      GTY604683Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  4. DISCONNECT BRAKE ACTUATOR HOSE 
    1. Slide the clip and disconnect the brake actuator hose from the brake booster pump with bracket assembly.
      GTY570739Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  5. REMOVE NO. 6 BRAKE TUBE CLAMP 
    1. Remove the bolt and No. 6 brake tube clamp from the brake booster pump with bracket assembly.
      GTY570740Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  6. REMOVE FRONT NO. 1 BRAKE TUBE 
    1. Using a 10 mm union nut wrench, remove the front No. 1 brake tube from the brake booster pump with bracket assembly.
      GTY570743Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  7. REMOVE FRONT SUSPENSION CROSSMEMBER SUB-ASSEMBLY 

    Refer to REMOVAL [06/2015 - 11/2018]

  8. REMOVE BRAKE BOOSTER PUMP WITH BRACKET ASSEMBLY 
    1. Disengage the clamp to separate the wire harness.
      GTY570744Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Disconnect the 2 brake booster pump assembly connectors.
    3. Disengage the clamp to separate the front No. 4 brake tube from the brake booster pump with bracket assembly.
      GTY569252Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    4. Disengage the clamp to separate the wire harness from the brake booster pump with bracket assembly.
      GTY570742Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    5. Remove the bolt and wire harness clamp bracket from the brake booster pump with bracket assembly.
      GTY570747Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    6. Remove the 3 nuts and brake booster pump with bracket assembly.
      GTY570748Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  9. REMOVE NO. 1 BRAKE TUBE CLAMP BRACKET 
    1. Remove the bolt and No. 1 brake tube clamp bracket from brake booster pump with bracket assembly.
      GTY557914Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  10. REMOVE BRAKE BOOSTER PUMP ASSEMBLY 
    1. Remove the 2 nuts, 2 brake booster pump bushings, 2 brake actuator case collars and brake booster pump assembly from the brake actuator bracket assembly.
      NOTE:
      • When handling the brake booster pump assembly, do not hold it at the parts marked *a, *b and *c in the illustration.
      • Do not drop the brake booster pump assembly when carrying it. Do not use a brake booster pump assembly that has been dropped.
      • Do not allow brake fluid to contact the inside of the connector.
      GTY593387Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *1 Nut
      *2 Brake Actuator Case Collar
      *3 Brake Booster Pump Bushing
      *4 Brake Actuator Bracket Assembly
      *5 Brake Booster Pump Assembly
      *6 Brake Actuator Bracket Cushion
      *a Union
      *b Connector
      *c Stud
    2. Remove the 2 brake actuator bracket cushions from the brake actuator bracket assembly.
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