Removal [06/2020 - 12/2021]: Procedure

1. Using the GTS, perform the accumulator pressure zero down operation.
   1. Select "Motor Deactivate" on the "ECB Utility" screen.

      Chassis > Brake/EPB > Utility 

      Tester Display
      ECB Utility

   2. Perform "Motor Deactivate" according to the display on the GTS.
   3. Select "ECB Deactivate" on the "ECB Utility" screen.

      Chassis > Brake/EPB > Utility 

      Tester Display
      ECB Utility

   4. Perform "ECB Deactivate" according to the display on the GTS.
   5. Depress the brake pedal 40 times or more to return all the fluid in the accumulator back to the reservoir.

      HINT: 

      A buzzer may sound due to low accumulator pressure. As this is not a malfunction, continue the procedure.

   6. Check that the brake pedal is firm.
      NOTE:

      If the brake pedal is not firm or the pump motor continues to operate even after depressing the brake pedal 40 times or more, the accumulator pressure zero down operation is not complete.

   7. Disconnect the cable from the negative (-) auxiliary battery terminal.

      Refer to REMOVAL [06/2020 - 12/2021]

2. When the accumulator pressure zero down could not be performed using the GTS.
   NOTE:

   If DTCs are output, the accumulator pressure zero down operation may not be complete. In this case, perform the following procedure.

   1. With the ignition switch off, disconnect the brake booster pump connector.

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      NOTE:

      Be careful not to allow any brake fluid to enter the connector.

   2. Depress the brake pedal 40 times or more to return all the fluid in the accumulator back to the reservoir.
   3. Check that the brake pedal is firm.
      NOTE:

      If the brake pedal is not firm or the pump motor continues to operate even after depressing the brake pedal 40 times or more, the accumulator pressure zero down operation is not complete.

   4. Disconnect the cable from the negative (-) auxiliary battery terminal.

      Refer to REMOVAL [06/2020 - 12/2021]

Refer to REMOVAL [06/2020 - ]

Refer to PROCEDURE - Step 6

Refer to PROCEDURE - Step 7

Refer to REMOVAL [06/2020 - 12/2021]

1. Disconnect the brake booster pump connector.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

2. Disconnect the brake fluid level warning switch connector.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

3. Release the lock lever and disconnect the connector from the brake master cylinder with pump assembly.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   	Release the lock lever
   	Disconnect the connector

   NOTE:

   Be careful not to allow any brake fluid to enter the connector.

4. Disengage the clamp to separate the engine room main wire from the brake master cylinder with pump assembly.

1. Using a union nut wrench, disconnect the 2 brake lines from the brake master cylinder with pump assembly.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   NOTE:

   • Do not kink or damage the brake lines.
   • Do not allow any foreign matter such as dirt or dust to enter the brake lines from the connecting parts.
2. Disengage the 4 clamps to remove the brake tube clamp from the brake lines.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   NOTE:

   Do not kink or damage the brake lines.

3. Disengage the 5 clamps to remove the brake tube clamp from the brake lines.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   NOTE:

   Do not kink or damage the brake lines.

Refer to REMOVAL [06/2020 - 12/2021]

Refer to PROCEDURE - Step 17

Refer to PROCEDURE - Step 2

1. Remove the brake pedal return spring from the brake pedal support assembly.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   Disconnect the connector from the brake pedal stroke sensor assembly.

2. Disengage the 2 clamps to separate the engine room main wire from the brake pedal support assembly.

1. Remove the clip and push rod pin.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. Remove the 4 nuts and brake master cylinder with pump assembly.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   *1	No. 1 Skid Control ECU
   *2	Reservoir Hose
   *3	Master Cylinder Push Rod Clevis
   *4	Boot
   *5	Reservoir
   *6	No. 1 Brake Actuator Tube
   *7	No. 1 Wire Clamp Bracket
   *8	Brake Booster with Accumulator Pump Assembly

   NOTE:

   • Do not apply excessive force to the brake lines.
   • Be careful not to allow any brake fluid to enter the connector.
   • Do not carry the brake master cylinder with pump assembly by the parts shown in the illustration.

HINT: 

Perform this procedure only when replacement of the No. 2 reservoir hose is necessary.

1. Slide the 2 clips and remove the No. 2 reservoir hose.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

2. Remove the 2 clips from the No. 2 reservoir hose.

HINT: 

Perform this procedure only when replacement of the No. 1 reservoir hose is necessary.

1. Slide the 2 clips and remove the No. 1 reservoir hose.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

2. Remove the 2 clips from the No. 1 reservoir hose.