MASS AIR FLOW METER INSPECTION

Info Added 2017-10-06

PROCEDURE


  1. INSPECT MASS AIR FLOW METER


    1. Check the output voltage.


      1. A001SU4C01
        *a

        Component without harness connected

        (Mass Air Flow Meter)
        B00495X Air

        Connect a battery positive (+) lead to terminal 1 (+B) and negative (-) lead to terminal 2 (E2G).

        Note

        While using the battery during inspection, do not bring the positive and negative tester probes too close to each other as a short circuit may occur.

      2. Connect the positive (+) tester probe to terminal 3 (VG) and negative (-) tester probe to terminal 2 (E2G).

      3. Blow air into the mass air flow meter and check that the voltage fluctuates.

        If the result is not as specified, replace the mass air flow meter.

    2. A001VF8C01
      *a Platinum Hot Wire (Heater)
      *b Temperature Sensor (Thermistor)

      Perform a visual check for any foreign matter on the platinum hot wire (heater) and temperature sensor (thermistor) of the mass air flow meter shown in the illustration.

      OK
      There is no foreign matter.

      If the result is not as specified, replace the mass air flow meter.

    3. A001XAEC07
      *a

      Component without harness connected

      (Mass Air Flow Meter)

      Measure the resistance according to the value(s) in the table below.

      Standard Resistance
      Tester Connection Condition Specified Condition
      4 (THA) - 5 (E2) -20°C (-4°F) 12.5 to 16.9 kΩ
      20°C (68°F) 2.19 to 2.67 kΩ
      60°C (140°F) 0.50 to 0.68 kΩ

      If the result is not as specified, replace the mass air flow meter.