Scion 2005-06

Mass Air Flow Meter

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Testing



  1. Apply battery voltage across terminals 1 (+B) and 2 (E2G).
  2.  
  3. Using a voltmeter, connect the positive (+) tester probe to terminal VG, and negative (-) tester probe to terminal E2G.
  4.  
  5. Blow air into the MAF meter, and check that the voltage fluctuates.

    Click image to see an enlarged view

    Fig. Connector pin identification and resistance table-2.4L (2AZ-FE) VIN D, E

  6.  
  7. Measure the resistance between terminals 4 (THA) and 5 (E2).
  8.  
  9. If the result is not as specified, replace the MAF meter.
  10.  



Click image to see an enlarged view

Fig. MAF temperature/resistance table-1.5L (1NZ-FE) VIN T

  1. Disconnect the negative battery cable.
  2.  
  3. Remove the 2 screws and MAF meter.
  4.  
  5. Using an ohmmeter, measure the resistance between terminals THA and E2.

    Click image to see an enlarged view

    Fig. MAF terminal identification and resistance chart-1.5L (1NZ-FE) VIN T

  6.  
  7. If the resistance is not as specified, replace the MAF meter.
  8.  
  9. Connect the MAF meter connector.
  10.  
  11. Connect the negative terminal cable to the battery.
  12.  
  13. Turn the ignition switch ON.
  14.  
  15. Using a voltmeter, connect the positive (+) tester probe to terminal VG, and negative (-) tester probe to terminal E2G.
  16.  
  17. Blow air into the MAF meter, and check that the voltage fluctuates. If the operation is not as specified, replace the MAF meter.
  18.  
  19. Turn the ignition switch OFF.
  20.  
  21. Disconnect the negative terminal cable from the battery.
  22.  
  23. Disconnect the MAF meter connector.
  24.  
  25. Install the MAF meter with the 2 screws.
  26.  
  27. Reconnect MAF meter connector.
  28.  



Click image to see an enlarged view

Fig. MAF temperature/resistance table-1.5L (1NZ-FE) VIN T

  1. Disconnect the negative battery cable.
  2.  
  3. Remove the 2 screws and MAF meter.
  4.  
  5. Using an ohmmeter, measure the resistance between terminals THA and E2.

    Click image to see an enlarged view

    Fig. MAF terminal identification and resistance chart-1.5L (1NZ-FE) VIN T

  6.  
  7. If the resistance is not as specified, replace the MAF meter.
  8.  
  9. Connect the MAF meter connector.
  10.  
  11. Connect the negative terminal cable to the battery.
  12.  
  13. Turn the ignition switch ON.
  14.  
  15. Using a voltmeter, connect the positive (+) tester probe to terminal VG, and negative (-) tester probe to terminal E2G.
  16.  
  17. Blow air into the MAF meter, and check that the voltage fluctuates. If the operation is not as specified, replace the MAF meter.
  18.  
  19. Turn the ignition switch OFF.
  20.  
  21. Disconnect the negative terminal cable from the battery.
  22.  
  23. Disconnect the MAF meter connector.
  24.  
  25. Install the MAF meter with the 2 screws.
  26.  
  27. Reconnect MAF meter connector.
  28.  

 
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