IS 250 AWD V6-2.5L (4GR-FSE) (2006)
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Vacuum Brake Booster Check Valve: Testing and Inspection
INSPECTION
1. INSPECT VACUUM CHECK VALVE
a. Inspect the vacuum check valve.
1. Remove the vacuum check valve.
2. Check that there is ventilation from the booster to the engine, and no ventilation from the engine to the booster.
HINT: If any fault is found, replace the vacuum check valve.
