MASS AIR FLOW METER(w/o DPF) INSPECTION

PROCEDURE

1. INSPECT MASS AIR FLOW METER SUB-ASSEMBLY

   
   

   1. Check the output voltage.

      
      
      1. 

         Text in Illustration

         *a	Component without harness connected (Mass Air Flow Meter Sub-assembly)
         *b	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 negative (-) tester probe to terminal 2 (E2G).

      3. Blow air into the mass air flow meter sub-assembly, and check that the voltage fluctuates.

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

   2. 

      Text in Illustration

      *a	Platinum Hot Wire (Heater)

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

      OK
      There is no foreign material.

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

   3. Check the temperature sensor.

      

      Text in Illustration

      *a	Component without harness connected (Mass Air Flow Meter Sub-assembly)	*b	Resistance kΩ
      *c	Temperature °C (°F)	*d	Acceptable

      
      

      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) 0.5 to 0.68 kΩ

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