This case study is perfect for anyone interested in the working details of Toyota/Lexus coil over plug ignition system, and the very similar three-wire designs used by many other manufacturers. We spend a lot of time with the Pico on this one, but don’t forget the other basic checks I discuss, including the spark output, power balance and moving a suspected bad coil to another cylinder.
Engine Performance Diagnostics chapter 22
Symptoms
check engine light (P0304)
misfire
Fix
replace the #4 ignition coil
Tests shown
how to perform a cylinder drop test (power balance test) to identify a misfiring cylinder
how to perform a relative compression test
how to perform a spark output check on a coil over plug ignition coil
understanding three and four-wire coil circuit design and operation
understanding Toyota IGT and IGF circuits and related trouble codes
how to scope test a COP coil using voltage and current
analyzing coil current waveforms and IGT/IGF signals
identifying differences between factory and aftermarket ignition coils
Tools used
scan tool
incandescent test light
Pico four channel automotive lab scope
low amp probe
Playlist
(Chapter 22) No Spark Troubleshooting, Ignition Coil & Module Testing
• (Chapter 22) No Spark ...
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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.
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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!
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.
3 окт 2024
