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Check Valve Operation Check

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  1. Remove the check valve (Refer to REMOVAL AND INSTALLATION <2.0 L ENGINE>  or REMOVAL AND INSTALLATION <2.4 L ENGINE> ).
    CAUTION: Replace the check valve when it is faulty.
  2. Using a vacuum pump, check operation of the check valve.
    OPERATION 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
    G05376264Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
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