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Home >> Toyota >> 2004 >> Celica GT, Standard >> Repair and Diagnosis >> Engine Performance >> Engine Control Systems >> SFI System >> Mass Air Flow (MAF) Meter >> Inspection

Mass Air Flow (MAF) Meter: Inspection

  1. INSPECT MAF METER RESISTANCE 

    Using an ohmmeter, measure the resistance between terminals THA and E2.

    Fig 1: Measuring Resistance Between Terminals THA & E2 Using An Ohmmeter
    G00945183Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    Resistance: 

    Fig 2: MAF Meter Resistance Table
    G00945182Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    If the resistance is not as specified, replace the MAF meter.

  2. INSPECT MAF METER OPERATION 
    1. Connect the MAF meter connector.
    2. Turn the ignition switch to ON.
      Fig 3: Connecting MAF Meter Connector
      G00945184Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    3. Using a voltmeter, connect the positive (+) tester probe to terminal VG, and negative (-) tester probe to terminal E2G.
    4. Blow air into the MAF meter, and check that the voltage fluctuates.

      If operation is not as specified, replaced the MAF meter.

    5. Turn the ignition switch LOCK.
    6. Disconnect the MAF meter connector.