Toyota Prius 2002-06

Mass Air Flow Meter

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Fig. Temperature/Resistance table

  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.

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    Fig. Terminals THA and E2

  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.

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    Fig. Terminals VG and 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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