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Home >> Mitsubishi >> 2003 >> Lancer LS >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 3 (Disc - Evolution) >> Testing >> Power Brake Booster >> Check Valve Inspection
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Check Valve Inspection

WARNING: This page is about a different variant/trim than selected.
CAUTION: If check valve is defective, replace check valve and vacuum hose as a unit. DO NOT disassemble check valve.

Remove vacuum hose from power brake booster. DO NOT remove check valve from hose. Check valve should hold vacuum in one direction and allow air to pass in other direction. Negative pressure should be created and held when vacuum is connected on brake booster side.

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