MASS AIR FLOW METER INSPECTION

PROCEDURE

1. INSPECT MASS AIR FLOW METER ASSEMBLY

   
   

   1. Check the output voltage.

      
      
      1. 

         Text in Illustration

         *a	Component without harness connected (Mass Air Flow Meter)
         	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 mass air flow meter and check that the voltage fluctuates.

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

   2. 

      Text in Illustration

      *1	Platinum Hot Wire (Heater)

      Perform a visual check for any foreign matter on the platinum hot wire (heater) 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 assembly.

   3. Check the intake air temperature sensor.

      

      Text in Illustration

      *1	Resistance	*2	Temperature
      *3	Acceptable Range	-	-
      *a	Component without harness connected (Mass Air Flow Meter)	-	-

      
      

      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 4 (THA) - 5 (E2) 20°C (68°F) 2.19 to 2.67 kΩ 4 (THA) - 5 (E2) 60°C (140°F) 0.50 to 0.68 kΩ

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