Trouble code 212 hard to find

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Jun 5, 2009 | 07:08 PM

#16

subford

Fleet Owner

Joined: Aug 2005

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From: Easton,Ks

Quote:

Originally Posted by mrf250

The reason I mention that is because maybe I'm not understanding what the ICM is.

ICM : Ignition Control Module.

Quote:

Originally Posted by mrf250

Are we talking about the Thin Film Integration - IV unit that normally attaches to the side of the Distributor like on my 86 tbird EFI and on my 96 truck is now called a DI system that mounts on the drivers side fender near the DLC and sits in a aluminum heat sink?

The Thick Film Integration (TFI) is a type of Ignition Control Module and was at one time mounted on the side of the Distributor. They moved it to the fender by the DLC plug but it is still the TFI ICM.
DI (Distributor Ignition) is a type of Ignition system and is used to denote it form the EI (Integrated Electronic Ignition System (High Data Rate)) used on some 1996 Ford that do not have a Distributor.

Quote:

Originally Posted by mrf250

Its grey and as far as I know is original. Let me know if I'm doing it wrong.

If it is Gray someone put the wrong one on and you would have an MIL (some call this light a CEL) on as your PCM would not be able to get a Ignition Diagnostic Monitor (IDM) from the ICM. This would also generate a 212 Code.
It should run a lot better with a Black one.

I think the last Gray ICM was used on 1993 Ford Trucks.

Jun 5, 2009 | 07:19 PM

#17

subford

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From: Easton,Ks

Quote:

Originally Posted by mrf250

Bill, I sent a couple of pictures to the email address in your post. First is the ICM so you can look at the color. Second is from the Haynes manual wiring showing 2 wires going into the E4OD.

Gary

I found it, Gmail put it in spam.

Jun 5, 2009 | 07:52 PM

#18

mrf250

Thread Starter

Freshman User

Joined: Jul 2006

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OK, I'll check it out. Will pull the icm looking for a part no. Never had a problem in the 5 years i've had it. Keep you posted.

Jun 11, 2009 | 08:35 AM

#19

mrf250

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I haven't followed up on the ICM black issue. Truck runs fine anyway. What I am doing is tracking down the code 624 that gives hard shifts and flashing O/D light. Got the truck back from Cottmans trans. last night after going through all the wiring. I was convinced the problem was transmission internal. It turns out that pins going to the harness were broken off. What a shock that was. How the hell can pins break in a connected harness attached to a hefty hunk of metal? $380$ later I have a new solenoid pack, harness and filter and oil change. I guess its worth it because of what I learned out of it. Still scratching my head on how those pins inside the harness broke.

Feb 23, 2023 | 06:47 PM

#20

foresixtee

Mountain Pass

Joined: Jul 2021

Posts: 193

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Beating a dead horse replying to this thread... but figured maybe someone will stumble upon it like I did in modern day.

Was about to close out of this and decided to share my fix.

Coil plug! Plastic connector had deteriorated and the two little connectors had corrosion. Thing wobbled loose and cause my whole 212 no start issue.