MASS AIR FLOW METER INSPECTION

PROCEDURE


  1. INSPECT INTAKE MASS AIR FLOW METER SUB-ASSEMBLY


    1. Check the output voltage.


      1. A01XJADE02
        Text in Illustration
        *a

        Component without harness connected

        (Intake Mass Air Flow Meter Sub-assembly)
        B001CHY Air

        Apply battery voltage across terminals 1 (+B) and 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. 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 intake mass air flow meter sub-assembly and check that the voltage fluctuates.

        If the result is not as specified, replace the intake mass air flow meter sub-assembly.

    2. A01XK2PE03
      Text in Illustration
      *1 Platinum Hot Wire (Heater)

      Perform a visual check for any foreign matter on the platinum hot wire (heater) of the intake mass air flow meter sub-assembly shown in the illustration.

      OK
      There is no foreign matter.

      If the result is not as specified, replace the intake mass air flow meter sub-assembly.

    3. Check the intake air temperature sensor.

      A01XDQCE09
      Text in Illustration
      *a

      Component without harness connected

      (Intake Mass Air Flow Meter Sub-assembly)

      		 *b Resistance
      *c Temperature *d Acceptable Range

      1. 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 intake mass air flow meter sub-assembly.