Montero SR 4WD V6-3.5L SOHC (1997)
Vacuum Brake Booster Check Valve: Testing and Inspection
NOTE: The check valve should not be removed from the vacuum hose.
OPERATIONAL CHECK
1. Remove the vacuum hose.
2. Check the operation of the check valve by using a vacuum pump.
3. A connection should be made at the brake booster side and a vacuum needs to be created (a) and held.
4. Connect the vacuum pump at the intake manifold side and a vacuum should not be created (b).
CAUTION: If the check valve is defective, replace it as an assembly unit together with the vacuum hose.