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honda accord 2003 v6 keeps frying pcm, its the 5th already

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2 years 2 months ago #54755 by Electricsanti22
honda accord 2003 v6 keeps frying pcm, its the 5th already was created by Electricsanti22
hello guys, iam working on this honda and at a previous shop pcm has been replaced 6 times so far and cust say everything works ok until 1 or 2 days driving that pcm is fried again, could you guy giveme any directions on where to start diagnosing this aprreciate it

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2 years 2 months ago #54763 by Cheryl
Replied by Cheryl on topic honda accord 2003 v6 keeps frying pcm, its the 5th already
Make sure the alternator bolts are tight. I know the older Hondas the bolts would get loose and fry pcm’s

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2 years 2 months ago #54777 by Tyler
Replied by Tyler on topic honda accord 2003 v6 keeps frying pcm, its the 5th already
What is fried about the PCM, exactly? Does it no longer communicate? Does an output no longer work?

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2 years 1 month ago - 2 years 1 month ago #54925 by Wightscope
Replied by Wightscope on topic honda accord 2003 v6 keeps frying pcm, its the 5th already
Check that no one has replaced a relay controlled by the ECU with one that does not have a resistor or diode to suppress the coil collapse spike.
Last edit: 2 years 1 month ago by Wightscope.

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2 years 1 month ago #54960 by gooe
Replied by gooe on topic honda accord 2003 v6 keeps frying pcm, its the 5th already
What is the symptom, exactly? What part of the ECM is no longer functioning?

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