Hydraulic Brake Booster: Removal: Removal

NOTE:

Be sure not to allow the pump to contact the floor; support it with the booster body. If the pump contacts the floor, the red brake tube between the pump and booster body may be deformed, the operating sound of the pump may become loud enough to hear within the cabin, and fluid may leak.
When installing, coat the parts indicated by arrows with lithium soap base glycol grease. Refer to COMPONENTS .
As high pressure is applied to the No. 1 brake actuator tube, never deform it.
Until the work is over, do not turn the engine switch on (IG).
Before starting the work, make sure that the engine switch is off and depress the brake pedal more than 20 times.

HINT:

When pressure in the power supply system is released, the reaction force becomes light and the stroke becomes longer.

DISCONNECT CABLE FROM NEGATIVE BATTERY TERMINAL
WARNING:
Wait at least 90 seconds after disconnecting the cable from the negative (-) battery terminal to disable the SRS system.
NOTE:
- w/ Navigation System:
  After the engine switch is turned off, the HDD navigation system requires approximately 6 minutes to record various types of memory and settings. As a result, after turning the engine switch off, wait 6 minutes or more before disconnecting the cable from the negative (-) battery terminal.
- When disconnecting the cable, some systems need to be initialized after the cable is reconnected. Refer to INITIALIZATION .
DRAIN BRAKE FLUID
NOTE:
Wash off brake fluid immediately if it comes into contact with a painted surface.
REMOVE FRONT DOOR SCUFF PLATE LH . Refer to REMOVAL - Step 6
REMOVE NO. 1 INSTRUMENT PANEL UNDER COVER SUB-ASSEMBLY . Refer to REMOVAL - Step 38
REMOVE COWL SIDE TRIM BOARD LH . Refer to REMOVAL - Step 39
REMOVE LOWER NO. 1 INSTRUMENT PANEL FINISH PANEL . Refer to REMOVAL - Step 40
REMOVE DRIVER SIDE KNEE AIRBAG ASSEMBLY . Refer to REMOVAL - Step 9
REMOVE PUSH ROD PIN See step 7
REMOVE HYDRAULIC BRAKE BOOSTER ASSEMBLY
1. Disconnect the 3 connectors from the hydraulic brake booster assembly.
  
  Fig 1: Identifying Hydraulic Brake Booster Assembly And Connectors
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Use tags or make a memo to identify the place to reconnect.
  
  Fig 2: Identifying Correct Positions Of Brake Lines To Hydraulic Brake Booster Assembly
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
3. Using a union nut wrench, disconnect the 4 brake lines from the hydraulic brake booster assembly.
  
  Fig 3: Identifying Brake Lines And Hydraulic Brake Booster Assembly
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
4. Remove the 4 nuts and pull out the hydraulic brake booster assembly.
  
  Fig 4: Identifying Brake Pedal Support Assembly And Nuts
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
REMOVE BRAKE BOOSTER GASKET
1. Remove the brake booster gasket from the hydraulic brake booster assembly.