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MAF sensor code P0102 from bad engine computer - (Chevy van)


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مشاهده 302

دریافت ویدئو: حجم کم کیفیت بالا
توسط محمد در 26 May 2018
توضیحات:

1996 Chevy Van G1500 5.7L Computer Problems. This was a common problem on the early General Motors full size G vans and Astro vans. They mounted the computer right below the brake master cylinder and they suffered from water intrusion. This was caused by a failure of the steel bolts that held the two halves of the aluminum computer housing together.
Knowing the circuit design of this MAF sensor was the key to proper diagnosis of a bad engine computer.

Engine Performance Diagnostics chapter 2 pages 8 and 25. Also chapter 12 pages 6 and 7

Symptoms
- multiple trouble codes (P0102, P0132, P0137, P0300, P1406, P0748)
- misfiring
- low power
- hesitation problems

Fix
- replace faulty engine computer

Tests shown
- how to test a MAF sensor circuit on a GM using a scope
- how to test for proper power and ground to a MAF sensor
- how to test a pull-down type signal circuit
- how to test an EGR valve position sensor circuit

Tools used
- scan tool
- lab scope
- backprobing tools

Playlist
- (Chapter 12) Mass Airflow Sensor Testing
https://www.youtube.com/playlist?list=PLAFYVCyenqcrUtzoyk65FMfo9pxhK6Vay

Related videos
- MAF sensor trouble code (P0102) caused by a bad ground (GM 3100) https://youtu.be/bJRLZnjS6ms
- How to test a GM MAF Sensor (Part 1)
https://youtu.be/p2QLxxstRn8
- How to test a GM MAF Sensor (Part 2)
https://youtu.be/E8sBg7kMbOw
- How to test a MAF sensor using a Picoscope - GM
https://youtu.be/h5KAHv47viw

For more information on this topic, I have written a “field manual” called Engine Performance Diagnostics which is available at www.scannerdanner.com as an eBook or paper book.
Want even more diagnostic training? Whether you are a DIY trying to fix your own car, someone looking to become an auto technician, or a current auto technician that wants to get more into diagnostics, subscribe to ScannerDanner Premium https://www.scannerdanner.com/join-scannerdanner-premium.html There is a 14 day free trial.
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!

Disclaimer:
Due to factors beyond the control of ScannerDanner LLC, it cannot guarantee against unauthorized modifications of this information, or improper use of this information. ScannerDanner LLC assumes no liability for property damage or injury incurred as a result of any of the information contained in this video. ScannerDanner LLC recommends safe practices when working with power tools, automotive lifts, lifting tools, jack stands, electrical equipment, blunt instruments, chemicals, lubricants, or any other tools or equipment seen or implied in this video. Due to factors beyond the control of ScannerDanner LLC, no information contained in this video shall create any express or implied warranty or guarantee of any particular result. Any injury, damage or loss that may result from improper use of these tools, equipment, or the information contained in this video is the sole responsibility of the user and not ScannerDanner LLC.

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