Toyota Tundra 2005 Service - Repair - Maintenance page 2611

GOOD
3rd
2nd
1st
Ventilation
No Ventilation
BRAKE
BRAKE BOOSTER ASSEMBLY
NO GOOD
(Double Cab)
ON−VEHICLE INSPECTION
1.
(a)
BR2238
HINT:
If the pedal goes down farthest the 1st time, and gradually rises
at the 2nd or 3rd time, the booster is airtight.
HINT:
S
S
(b)
HINT:
S
S
(c)
BR2237
If the pedal goes down farthest the 1st time, but gradually rises
after the 2nd or 3rd time, the booster is air tight.
2.
(a)
F18755
− BRAKE BOOSTER ASSEMBLY (Double Cab)
INSPECT BRAKE BOOSTER
Air tightness check.
(1) Start the engine and stop it after 1 or 2 minutes. De-
press the brake pedal several times slowly.
(2) Depress the brake pedal while the engine is run-
ning, and stop the engine with the pedal depressed.
If there is no change in the pedal reserve distance after
holding the pedal for 30 seconds, the booster is airtight.
If not, replace the brake booster.
Operating check.
(1) Depress the brake pedal several times with the igni-
tion switch OFF and check that there is no change
in the pedal reserve distance.
(2) Depress the brake pedal and start the engine.
If the pedal goes down slightly, the operation is normal.
If not, replace the brake booster.
Start the engine and stop it after 1 or 2 minutes. Depress
the brake pedal several times slowly.
INSPECT VACUUM CHECK VALVE
Check the vacuum check valve.
(1) Slide the clip and disconnect the vacuum hose.
(2) Remove the vacuum check valve.
(3) Check that there is ventilation from the booster to
the engine, and no ventilation from the engine to the
booster.
(4) If any fault is found, replace the vacuum check
valve.
BR−35
BR1XE−02