Installation [03/2017 - 05/2023]: Procedure

1. Install a new brake master cylinder gasket to the brake master with stroke simulator cylinder assembly.

1. Temporarily install the brake master with stroke simulator cylinder assembly to the body.
   NOTE:

   • Do not kink or damage the No. 2 brake actuator tube.
   • Protect the surface of the relay block so that it does not become damaged on the brake master with stroke simulator cylinder assembly.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

2. Attach the wire harness clamp.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

3. Connect the brake fluid level warning switch connector.
4. Install the brake master with stroke simulator cylinder assembly with the 4 nuts.

   Torque: 12.7 N.m (130 kgf/cm, 9 ft.lbf) 

See step  3 [03/2017 - 04/2020], or see step  3 [04/2020 - 05/2023]

Refer to INSTALLATION [03/2017 - 05/2023]

See step  6 [03/2017 - 04/2020], or see step  6 [04/2020 - 05/2023]

Refer to PROCEDURE - Step 5 [03/2017 - 06/2019] , or refer to PROCEDURE - Step 5 [06/2019 - 04/2020] , or refer to PROCEDURE - Step 5 [04/2020 - 05/2023]

Refer to PROCEDURE - Step 6 [03/2017 - 06/2019] , or refer to PROCEDURE - Step 6 [06/2019 - 04/2020] , or refer to PROCEDURE - Step 6 [04/2020 - 05/2023]

Refer to INSTALLATION [03/2017 - 05/2023]

1. Using a union nut wrench, connect the brake tube to the brake master with stroke simulator cylinder assembly.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   Specified tightening torque 

   Torque: 15.2 N.m (155 kgf/cm, 11 ft.lbf) 

   NOTE:

   • Do not kink or damage the brake tube.
   • Do not allow any foreign matter such as dirt or dust to enter the brake tube from the connecting parts.

   HINT: 

   • Calculate the torque wrench reading when changing the fulcrum length of the torque wrench.

     Refer to PRECAUTION [03/2017 - 05/2023]

   • When using a union nut wrench (fulcrum length of 22 mm (0.8661 in.)) + torque wrench (fulcrum length of 162 mm (6.3779 in.)): 13.4 N.m (137 kgf/cm, 10 ft.lbf)

Refer to INSTALLATION [03/2017 - 05/2023]

Refer to INSTALLATION [03/2017 - 05/2023]

Refer to BLEEDING [03/2017 - ] 

Refer to ADJUSTMENT [03/2017 - 04/2020] , or refer to ADJUSTMENT [04/2020 - ] 

Refer to ON-VEHICLE INSPECTION [03/2017 - 04/2020] , or refer to ON-VEHICLE INSPECTION [04/2020 - 05/2023]

HINT: 

If removing and installing the No. 2 brake actuator tube, check for a brake fluid leak from the No. 2 brake actuator tube connection area by monitoring the accumulator pressure sensor output value from the brake actuator. Directly checking for a brake fluid leak from the No. 2 brake actuator tube connection area is difficult.

1. Turn the engine switch off.
2. Connect the Techstream to the DLC3.
3. Turn the engine switch on (IG).
4. Operate the Techstream according to the display and select "DATA LIST".

   Chassis > ABS/VSC/TRAC > Data List 

   Tester Display
   Accumulator Sensor

   Skid control ECU

   Tester Display	Measurement Item/Range	Normal Condition	Diagnostic Note
   Accumulator Pressure Sensor	Accumulator pressure sensor / min.: 0 V, max.: 5 V	Specified value: 2.6 to 3.8 V	-

5. Depress the brake pedal 4 or 5 times to operatethe pump motor, and check the output value on the Techstream with the motor stopped (not braking).

   OK

   Accumulator pressure sensor's output voltage drops 0.2 V or less for 30 seconds.

   If the voltage drops more than 0.2 V, there may be a brake fluid leak from the No. 2 brake actuator tube connection area. Remove the brake actuator and brake accumulator pump, and then repeat the procedures above from the retightening of the 2 union nuts of the No. 2 brake actuator tube.

   Specified tightening torque 

   Torque: 15.2 N.m (155 kgf/cm, 11 ft.lbf) 

   HINT: 

   • Calculate the torque wrench reading when changing the fulcrum length of the torque wrench.

     Refer to PRECAUTION [03/2017 - 05/2023]

   • When using a union nut wrench (fulcrum length of 22 mm (0.8661 in.)) + torque wrench (fulcrum length of 162 mm (6.3779 in.)): 13.4 N.m (137 kgf/cm, 10 ft.lbf)

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   *a	Torque Wrench Fulcrum Length

Refer to ON-VEHICLE INSPECTION [03/2017 - ] 

Refer to TEST MODE PROCEDURE [03/2017 - 05/2023]