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BRAKE BOOSTER ASSY (RHD)
ON–VEHICLE INSPECTION
GOOD
3rd
2nd
1st
Ventilation
No Ventilation
AVENSIS REPAIR MANUAL (RM1018E)
BRAKE
1.
NO GOOD
(a)
HINT:
If the pedal can be depressed to the f;oor the first time, but on
the 2nd or 3rd time cannot be depreesed as far, the booster is
airtight.
BR2238
HINT:
If there is no change in the pedal reserve distance after holding
the pedal for 30 seconds, the booster is airtight.
(b)
HINT:
If the pedal goes down slightly, operation is normal.
2.
(a)
BR2237
G24221
http://vnx.su
–
BRAKE BOOSTER ASSY (RHD)
INSPECT BRAKE BOOSTER
Airtightness 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.
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.
INSPECT VACUUM CHECK VALVE
Inspect 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.
32–21
320GN–02
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