FICM
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FICM
I have a no start condition in my 05 f250. Had all the codes on all 8 injectors and the 611 which from the posts I've read here points to the FICM. I have the 48 volts on the FICM, but after key on, the voltage drops to 20 for a few seconds, (I think during the injector buzz test) then the voltage goes back to 48. The voltage from what I've read should stay at 48 volts. Is this correct? I took the voltage multiplier board out of the FICM and did the resolder, although I couldn't see any cracks in the solder. Put the FICM back in and still no restart and no codes.
I have the FICM back out and on the work bench. Have a 12 volt power supply hooked up. Monitoring the 48 volts while increasing the load. I took the load all the way up until the 10 amp breaker tripped on the 12 volt power supply and the 48 volts stayed solid.
Any recommendations?
I have the FICM back out and on the work bench. Have a 12 volt power supply hooked up. Monitoring the 48 volts while increasing the load. I took the load all the way up until the 10 amp breaker tripped on the 12 volt power supply and the 48 volts stayed solid.
Any recommendations?
Hotshot
Joined: Dec 2003
Posts: 15,368
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From: Stuttgart, Ar
Did you read the latest repair info compiled by Pstrang which is now in the tech folder also. Have you had your batteries checked in your vehicle? It's possible that you lost the programming in your FICM and it may need to be reflashed. Checked the ICP pressure while cranking? Dash oil pressure while cranking?
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I read Pstrang's post if I haven't read it. Read so many can't remember which is which. I've had the batteries checked. I'll have to put the FICM back in to crank and check ICP pressure. I know the dash oil pressure rises when cranking.
Had a friend (Ford service tech) come over with his laptop and a new FICM a couple days ago. He had computer problems and couldn't get communication. New FICM is setting on the seat and my friend hasn't called back yet. Thought I would take another shot at the FICM, get it to work and save a few hundred.
First no start was 12 miles from home. Towed the truck home. Cranked for a while next day and it did start. Drove it to the shop and connected the monitor. Shut it off and hasn't started since.
Do you know if the 48 volts should drop to 20 for a few seconds after key on?
Had a friend (Ford service tech) come over with his laptop and a new FICM a couple days ago. He had computer problems and couldn't get communication. New FICM is setting on the seat and my friend hasn't called back yet. Thought I would take another shot at the FICM, get it to work and save a few hundred.
First no start was 12 miles from home. Towed the truck home. Cranked for a while next day and it did start. Drove it to the shop and connected the monitor. Shut it off and hasn't started since.
Do you know if the 48 volts should drop to 20 for a few seconds after key on?
Hotshot
Joined: Dec 2003
Posts: 15,368
Likes: 121
From: Stuttgart, Ar
I read Pstrang's post if I haven't read it. Read so many can't remember which is which. I've had the batteries checked. I'll have to put the FICM back in to crank and check ICP pressure. I know the dash oil pressure rises when cranking.
Had a friend (Ford service tech) come over with his laptop and a new FICM a couple days ago. He had computer problems and couldn't get communication. New FICM is setting on the seat and my friend hasn't called back yet. Thought I would take another shot at the FICM, get it to work and save a few hundred.
First no start was 12 miles from home. Towed the truck home. Cranked for a while next day and it did start. Drove it to the shop and connected the monitor. Shut it off and hasn't started since.
Do you know if the 48 volts should drop to 20 for a few seconds after key on?
Had a friend (Ford service tech) come over with his laptop and a new FICM a couple days ago. He had computer problems and couldn't get communication. New FICM is setting on the seat and my friend hasn't called back yet. Thought I would take another shot at the FICM, get it to work and save a few hundred.
First no start was 12 miles from home. Towed the truck home. Cranked for a while next day and it did start. Drove it to the shop and connected the monitor. Shut it off and hasn't started since.
Do you know if the 48 volts should drop to 20 for a few seconds after key on?
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Freshman User
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Voltage seems to go back up to 48 after buzzing stops. I'll have to get some long jumpers so I can see the WTS light.
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Senior User
Joined: Mar 2007
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From: Qld Australia
Here's a question:-
Will the FICM eventually lose it's programming if left disconnected from battery power??
Will the FICM eventually lose it's programming if left disconnected from battery power??
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Jason
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Start with battery / terminal / wiring issues going into the FICM.
Follow link below to ensure that you have solid and clean power going into the FICM.
What is voltage when cranking?
It should be above 10V.
Senior User
Joined: Mar 2007
Posts: 204
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From: Qld Australia
Hope not. It's been over two years without power now. And being in Australia, I can't just go down to my local dealer to get it re-flashed.
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Jason
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