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Codes P0351 and P0354

Tiny
TRINITY ADAMS
  • MEMBER
  • 2007 FORD EDGE
  • 220,000 MILES
I’m trying find PCM pin out wiring diagram so I can check to see if it is burnt out. I know about coils going bad frying PCM, but my coils looks good on cylinder 1 and 4.
Thursday, January 30th, 2020 AT 7:35 AM

13 Replies

Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 48,363 POSTS
Hello,

Here is a guide to help you test he wiring with the engine wiring diagrams in the images below:

https://www.2carpros.com/articles/how-to-check-wiring

Check out the diagrams (below). Please let us know what you find.
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Thursday, January 30th, 2020 AT 10:45 AM
Tiny
BMDOUBLE
  • MECHANIC
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Here is a pinout for connector c175e, the center one on your PCM. Let us know if you need anything else.
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Thursday, January 30th, 2020 AT 10:46 AM
Tiny
TRINITY ADAMS
  • MEMBER
  • 7 POSTS
Thanks for info. It started out ignition coil on cylinder 1 so I switched it with number 4 didn’t fix. Can unplug coil on 1 and 4 while running no difference in engine. So today I take number 4 coil out of cylinder plugged it in held a grounded wire next to it to see if firing no fire. So I plug same coil in to number 5 plug did same thing it’s firing(coil working). Now when I unplug cylinder 1 and 4 and 5 while engine running no difference. So my question is, even though I saw coil working do you think that coil could be bad causing it burn my computer each time? Same coil on all 3 cylinder has caused them to quit working. Thinking about sending computer out tomorrow to have checked.
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Thursday, January 30th, 2020 AT 4:56 PM
Tiny
BMDOUBLE
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I would replace the coils that are in question, no doubt! The problem is that the transistor inside of the PCM goes bad and fires the coil constantly until it burns the coil out. Here is a picture of a damaged coil when the PCM goes bad all the way.
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Friday, January 31st, 2020 AT 7:08 AM
Tiny
TRINITY ADAMS
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  • 7 POSTS
Sent PCM out today.
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Friday, January 31st, 2020 AT 11:44 AM
Tiny
TRINITY ADAMS
  • MEMBER
  • 7 POSTS
Coil looks good, but when I tested trigger wire yesterday it had a ground all the time though.
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Friday, January 31st, 2020 AT 11:47 AM
Tiny
BMDOUBLE
  • MECHANIC
  • 1,139 POSTS
How exactly did you test it?
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Saturday, February 1st, 2020 AT 9:16 AM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 48,363 POSTS
Was the wiring harness connected to the PCM still when you did the testing?
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Saturday, February 1st, 2020 AT 10:16 AM
Tiny
TRINITY ADAMS
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Yes plugged in. At connector I put paper clip each one with multi meter hooked to it. Shows be a ground on trigger wire all the time (key off or on).
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Saturday, February 1st, 2020 AT 11:34 AM
Tiny
TRINITY ADAMS
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  • 7 POSTS
Visually the coil in question looks good when I measure ohms on it, it is 1.0.
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Saturday, February 1st, 2020 AT 12:04 PM
Tiny
BMDOUBLE
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Yeah that circuit should be open, so your PCM is faulty. The people you sent it to should be able to identify the faulty transistors and replace them.
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Sunday, February 2nd, 2020 AT 2:40 PM
Tiny
TRINITY ADAMS
  • MEMBER
  • 7 POSTS
Circuit board medics fixed computer ($199.00) eBay Motorcraft coils and plugs $197.00 but it’s fixed. Now if I can figure out what’s wrong with my other car all will be good.
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Wednesday, February 5th, 2020 AT 4:46 PM
Tiny
BMDOUBLE
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Yes! Good job! We can help with anything else you got.
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Thursday, February 6th, 2020 AT 9:13 AM

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