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How to test a Nissan 6-wire stepper type IAC motor.

Engine Performance Diagnostics Chapter 20 pages 15-20

symptoms 50

  • stalling
  • start stall
  • high idle
  • check engine light (P0505 trouble code)

fix 50

  • replace faulty IAC valve

test shown enh 50

  • how to test a 6 - wire stepper motor
  • how to verify control circuit integrity
  • how to test a computer driver
  • IAC motor voltage waveforms

Tools used

  • test light (LED type is preferred for this test)
  • lab scope
  • scan tool
  • back-probing tools

end faq

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Playlist

(Chapter 20) Idle Speed Problems and Testing

Related videos:

Idle speed control error fault codes (P0507) - vacuum leak:

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Ford idle air control valve (IAC) test - stalling problems :

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Ford Idle Air Control (IAC) valve test (how to adjust minimum idle speed):

{youtube}ayjhL9jpFH8|615|345|0{/youtube}

Solenoid Type idle air control valve IAC test using a Picoscope - Ford:

{youtube}WoFt3uzQd44|615|345|0{/youtube}

end faq

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For more information on this topic, I have written a “field manual” called Engine Performance Diagnostics which is available as an eBook or paper book.

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On ScannerDanner Premium I will bring you right into my classroom at Rosedale Technical College. You will find page for page lectures taken right from my book as well as exclusive classroom type case studies. What is so special about these classroom case studies? I pull live problem vehicles directly into my classroom and we troubleshoot them in real time, using and applying the theory and testing procedures we learn during the classroom lectures. There is no better on-line training of how to troubleshoot automotive electrical and electronics systems anywhere!