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Fig. 50: Measuring Clearance Between Brake Booster Assy And SST (2 Of 2)
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
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Using SST, adjust the booster push rod length until the push rod lightly touches the pin head.
SST 09737-00020
Fig. 51: Adjusting Booster Push Rod Length
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
13.INSTALL BRAKE MASTER CYLINDER SUB-ASSY
a. Install the brake master cylinder sub-assy and vacuum check valve bracket with 2 nuts.
Torque: 13 N.m (130 kgf.cm, 9 ft.lbf)
b. Connect the brake fluid level warning switch connector to the master cylinder reservoir.
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Fig. 52: Installing Brake Master Cylinder Sub-Assy And Vacuum Check Valve Bracket With
Nuts
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
c. Using SST, install the brake tube to the brake master cylinder sub-assy and ABS & TRACTION
actuator assy.
SST 09751-36011
Torque: 15 N.m (155 kgf.cm, 11 ft.lbf)
d. Install the clamp.
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Fig. 53: Installing Brake Tube To Brake Master Cylinder Sub-Assy And ABS & TRACTION
Actuator Assy
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
14.FILL RESERVOIR WITH BRAKE FLUID
15.BLEED MASTER CYLINDER (SEE BLEEDING
)
16.BLEED BRAKE LINE (SEE BLEEDING
)
17.CHECK FLUID LEVEL IN RESERVOIR
18.CHECK FOR BRAKE FLUID LEAKAGE
If fluid leaks, tighten or replace the leaking part.
19.INSTALL ENGINE ROOM NO.3 R/B
a. Install the engine room No.3 R/B with a bolt.
20.INSTALL ENGINE ROOM SIDE COVER
COMPONENTS
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Fig. 54: Exploded View Of Brake Booster Assy
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
ON-VEHICLE INSPECTION
1.OPERATION CHECK
a. Depress the brake pedal several times with the en
gine off and check that there is no change in the
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pedal reserve distance.
b. Depress the brake pedal and start the engine. If the pedal goes down slightly, operation is normal.
If not, replace the brake booster.
Fig. 55: Identifying Brake Pedal Operation Check
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
2.AIR TIGHTNESS CHECK
a. Start the engine and stop it after 1 or 2 minutes. Depress the brake pedal several times slowly.
If the pedal can be depressed to the floor the first time, but on the 2nd or 3rd time cannot be
depressed as far, the booster is airtight.
If not, replace the brake booster.
b. Depress the brake pedal while the engine is running, and stop the engine with the pedal depressed.
If there is no change in the pedal reserve travel after the pedal is held for 30 seconds, the booster is
air tight.
If not, replace the brake booster.
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Fig. 56: Identifying Air Tightness Check
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
3.INSPECT VACUUM CHECK VALVE
a. Check that there is ventilation from the booster to engine, and no ventilation from the engine to the
booster.
b.If any fault is found, replace the vacuum check valve.
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Fig. 57: Inspecting Vacuum Check Valve
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
REPLACEMENT
1.REMOVE ENGINE ROOM SIDE COVER
2.SEPARATE ENGINE ROOM NO.3 R/B
a. Remove the bolt and separate the engine room No.3 R/B.
3.DRAIN BRAKE FLUID
a. Draw out fluid with syringe.
4.REMOVE BRAKE MASTER CYLINDER SUB-ASSY
a. Remove the clamp from the 2 brake tubes.