2015 Ford Transit Van - Misfire Case Study Video

Bernie Diagnostician Albuquerque, New Mexico Posted   Latest   Edited  
Case Study
ATS - Automotive Test Solutions
Driveability
2015 Ford Transit-150 3.5L (G 99G) 6-spd (6R80)
Misfire

Here is a case study I have just completed covering misfire analysis. I hope this helps.

diag​.​net/file/f59ii25qq…

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Robert Owner/Technician
Weslaco, Texas
Robert Default
 

Fantastic Bernie! Love my ATS 4 Channel. Can't wait to try using the output more. Keep the video's coming. RR

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Elias Owner/Technician
Poway, California
Elias Default
 

Thats a great way of testing... my only question is couldnt the load be coming from a pcm supplied ground or signal that was shorted in the harness? And when the pcm is disconnected the short/load would not show as the signal was coming from the pcm to begin with through the shorted path in the harness?? Maybe im over thinking it.

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Bernie Diagnostician
Albuquerque, New Mexico
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No you are not over thinking this. The wiring could become shorted within the harness. Once the harness connector is removed from the ECM, take one of the scope channels and test each pin at the harness. Only one pin should have a frequency on it. If any other pin (wire) has a frequency on it they are shorted together.

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Elias Owner/Technician
Poway, California
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Thank you bernie. I appreciate the follow up!

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Jonathan Educator
Concord, California
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Elias; Good morning Sir, I hope all is well. Watching both of Bernie's videos where he uses the TTL Circuit of the ATS Scope I had the same question. While diagnosing a 1999 Ford Taurus the vehicle was setting codes for both of the Down Stream Oxygen Sensor Heater Circuits. The circuits were being pulled to ground as soon as the key was turned on (setting Low Voltage Codes). Installing the TTL…

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Edwin Mobile Technician
Charleston, South Carolina
Edwin Default
 

Bernie that is exactly why the ATS Escope 4 Elite is the most intuitive scope out there. The TTL pull down feature is an awesome addition to this scope. Thank you Bernie for all you do for our industry. Great case study. This scope disables the parts cannon!

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David Instructor
Kokomo, Indiana
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Thanks Bernie - great case study on COP drivers. Love the extra features in that scope!

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Jerry Technician
Rockville Centre, New York
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How do we know what frequency to set the pulldown signal to?

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Bernie Diagnostician
Albuquerque, New Mexico
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Jerry When looking for a circuit that maybe loaded, any frequency will work. I usually use 20 to 100 Hz, I use the TTL output for this. The pull down out is to sink current, such as to turn on a fuel injectors or ignition coils.

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Jerry Technician
Rockville Centre, New York
Jerry Default
 

Thank you very much I wasn't sure if it made any difference.

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Phil Technician
Tewksbury, Massachusetts
Phil Default
 

Another excellent case study showing a logical approach to finding the problem. What are you using to seal the wires after using your piercing probes? I have to admit that I die a little inside every time I see them being used. Up here in the North East that is a recipe for disaster after a year or two when the green fuzzies take over.

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Bernie Diagnostician
Albuquerque, New Mexico
Bernie Default
 

Phil I seal all wires with clear Plastic Dip. It comes in a large can and I put it in small containers that I carry . This works well to seal the wire and the clear is not visually noticeable.

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Brendan Owner/Technician
Browns Plains, Australia
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Great demo of some interesting handy scope features.

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