After having my car fixed and driving it for a whopping one week, I seem to have another issue. 

 

Whenever I start the engine my IC just completely dies. The car drives fine and everything including cruise control works, but the IC stays dead until I turn the engine off, lock the car and return in five minutes. Then it works again until I start the engine. 

 

I plugged in my BT OBD and Forscan shows the IC is getting 20V sent to it. I checked the fuses but they seem fine. The battery has 12.7 volts, and 14.5 volts with the engine on. So I was thinking it might be the voltage regulator or something inside the IC that's causing this. 

 

Is there anyone who had the same issue? 

2 hours ago, Dresden said:

Is there anyone who had the same issue? 

I have never heard of this specific issue, but your generation car has a generic issue that is well known. Ford used lead free solder on the IC to be 'green' which worked fine for a period of time, then the solder drys out causing all sorts of various electrical gremlins. Sounds like you may be subject to this. There is a whole industry now built up around repairing the IC. Not expensive, sub £100, and if you do a search on Ebay you'll find loads of places to get it done...

There's even a guy on this forum that does the repair, but I can't find the darn bookmark LOL

Find a guy called Ollie Jones on facebook, the goto guy on a focus forum i frequent.

1 hour ago, StephenFord said:

There's even a guy on this forum that does the repair

@rd457 Lyndon.

The IC already has a new solder, I had it repaired 3 months ago. Anyway, I called the guy who made the repair and he said to bring the car over. It's a two hour drive so I'm trying to figure out what might be causing the issue before I go on Tuesday. 

 

And one more funny thing, when I unplug the IC, my car still starts and drives fine. I thought the immobilizer was tied to the IC? 

On 12/31/2023 at 12:17 PM, Dresden said:

And one more funny thing, when I unplug the IC, my car still starts and drives fine. I thought the immobilizer was tied to the IC?

If we are talking about a 2008 Ford Focus then to the best of my knowledge the PATS is part of the instrument cluster on a UK specification model. However I'm lead to believe that PATS was not a standard thing on all European and North America models. 

If you have keyless entry & start on a Mk2, the cluster is not part of the PATS system.

Yeah it's keyless. Lucky me, otherwise I would have to get the car towed again.

 

I think the issue is going to be in one of the fuse boxes. Forscan is showing buttload of DTCs and they are mostly voltage related. 

It's fixed now. The voltage regulator inside the IC kept overheating, but they guy wasn't able to find out why. So he replaced the entire PCB with one from another car. Seems like these things only happen to me. 🤣