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Old 07-19-2012, 10:08 AM
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FICM voltage question

So I connected scanguage that had the FICM voltage programmed into my new to me 2006 E-350. Turned on the key, engine off and the FICM voltage slowly creeped up from 7-48.5V over 10-15s..... My thought would be it would jump up faster than this? Battery voltage was 12.4V same as the other FICM reading on scangauge.

I have a puff of white diesel when it starts cold so I'm wondering if this FICM voltage is the cause of that?

Any thoughts or things I should check?
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Old 07-19-2012, 10:37 AM
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What does it do cranking, running, hot and cold. It should jump right up. Looks like it's shot. Good way to kill injectors. Get those batteries load tested.

Sent from my SCH-I500
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Old 07-19-2012, 10:42 AM
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Quote:
Originally Posted by southend View Post
What does it do cranking, running, hot and cold. It should jump right up. Looks like it's shot. Good way to kill injectors. Get those batteries load tested.

Sent from my SCH-I500
Cranking it does drop the battery voltage to 11.5ish or so. Once it gets to 48V it stays there solid if the engine is off or running.

This van has been sitting since April 2011 and only driven about 200kms in that time. Will test the batteries out. I have all the service done on this van and looks like in Jan 2011 they changed out the FICM at the dealership! Hopefully that means it's just weak batteries. I can solder and have the FICM guide to repair the solder connections that typically go bad. THere might even be warranty on the new FICM from the dealership too.
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Old 07-21-2012, 05:19 PM
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This is the startup delay on the FICM 48V circuit. The FMP is the FICM... the VLT is battery voltage.

the other two are just Engine Oil Temp and Coolant temps

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Old 07-21-2012, 05:23 PM
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not sure how fast a scanguage reads but My FICM is BAM at full voltage on my A/E and CTS even when I had a failing one it would read full voltage untill I started then it would drop 15 volts and slowly climb ,,

maybe try to swap the guage to a known good tuck?
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Old 07-21-2012, 05:24 PM
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I ran scan guage on my Buddy's 04 F-450 and it was 48V almost instantly. There is something up with my FICM me thinks. But the question I have to answer is... is the problem in the FICM... or the power to the FICM from the batteries

Last edited by kilo69; 07-21-2012 at 05:27 PM.
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Old 07-21-2012, 05:30 PM
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Quote:
Originally Posted by kilo69 View Post
I ran scan guage on my Buddy's 04 F-450 and it was 48V almost instantly. There is something up with my FICM me thinks. But the question I have to answer is... is the problem in the FICM... or the power to the FICM from the batteries
Probably both, that ficm is shot. Load test the batteries, replace if necessary. Test the alternator.

Sent from my SCH-I500
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Old 07-21-2012, 05:35 PM
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Batteries sound normal to me that Mimics my voltages ,, but never hurts to load test
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Old 07-21-2012, 07:54 PM
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It's your FICM! Get it switched out before you fry your injectors. I used FICM Repair.com - Your Source for FICM Repair when I had mine replaced. The longer you wait, the more damage you do! Good luck!
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