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# MASS AIR FLOW METER > INSPECTION

## for Preparation Click here

1. INSPECT MASS AIR FLOW METER

1. Check the output voltage.

   1. Apply battery voltage across terminals 1 (+B) and 2 (E2G).

   2. Using a voltmeter, connect the positive (+) tester probe to terminal 3 (VG), and the negative (-) tester probe to terminal 2 (E2G).

   3. Blow air into the MAF meter, and check that the voltage fluctuates.
      If the result is not as specified, replace the MAF meter.

1. Check the IAT sensor.

   1. Measure the resistance between terminals 4 (THA) and 5 (E2).

      Standard resistance:

        Condition | Specified Condition
        -20°C (-4°F) | 13.6 to 18.4 kΩ
        20°C (68°F) | 2.21 to 2.69 kΩ
        60°C (140°F) | 0.493 to 0.667 kΩ

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