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Home >> Mitsubishi >> 2010 >> Lancer Evolution SE >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 77 (Basic Brake System -- Lancer Evolution) >> On-Vehicle Service >> Check Valve Operation Check

Check Valve Operation Check

WARNING: This page is about a different variant/trim than selected.
  1. Remove the check valve (Refer to MASTER CYLINDER ASSEMBLY AND BRAKE BOOSTER ASSEMBLY  ).
    CAUTION: Replace the check valve when it is faulty.
  2. Using a vacuum pump, check operation of the check valve.
    VACUUM PUMP REFERENCE CHART

    Vacuum pump connection Normal condition
    When connected to the booster side (1) Vacuum is generated and maintained.
    When connected to the engine side (2) No vacuum is generated.
    Fig 1: Checking Operation Of Check Valve Using Vacuum Pump
    G06677657Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
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