FICM issue

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Aug 24, 2019 | 05:26 PM

reverendxlt

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FICM issue

Had a no start issue recently. Turned out both batteries were not good, so I replaced them. Figured the no start was FICM related, so I replaced the power supply.

In the meantime, ordered a scan gauge. Reinstalled FICM, scan gauge reading 0.00 for main power and 5.5-6 for logic power.

I think it's likely a grounding issue... but any other ideas?

Aug 24, 2019 | 06:48 PM

SmackDaddy

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Joined: Sep 2016

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From: Texas

Your FICM could be toast, it’s a symptom of cranking too much with low voltage.

Aug 24, 2019 | 07:52 PM

reverendxlt

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Well, I likely did that... crap

Aug 25, 2019 | 03:26 AM

bismic

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Send it to FICMrepair.com. No need to buy a new one.

Aug 25, 2019 | 04:35 AM

Yahiko

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Joined: Apr 2012

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From: Spanaway

While it's out take the alternator and have it bench tested.
Bad alternator can also cause FICM and Battery damage.

Aug 25, 2019 | 01:40 PM

FICMrepair.com

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Quote:

Originally Posted by Yahiko

While it's out take the alternator and have it bench tested.
Bad alternator can also cause FICM and Battery damage.

I agree with Sean - please get the alternator bench tested. When it is being tested, please be sure to test it when it is physically uncomfortably hot to the touch as bad voltage regulators show their ugliness then. Many have resorted to sticking the thing in the kitchen oven at 225 for an hour just before the test. Crazy, but it works.

Good luck!

Ed

Aug 29, 2019 | 02:04 PM

reverendxlt

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I replaced the batteries... tested the alternator... Replaced the power supply in the FICM.

Now the FMP is actually showing 0.00 for main power and 5.5 for logic... Is there a ground that would affect this?