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Discussion Starter #1
I've got a 2018 Eclipse Cross (ES, 2wd). Its just over 2 yrs old now and been running great.

Then the unthinkable: FLOOD

Just moved into a new house, but was not told the street floods if it rains hard for an hour. One day my neighbor calls me at 8am. "Dude, get out and move your car NOW!". I waded through knee deep water and cringed as I opened the door and saw the gallons pouring in. Took me all day to get it close to dry and two weeks to get it completely.

A short time later I had some warning lights come on my dash: Airbags, ABS & DCS

Took it to the dealer, hoping to get it taken care of, as it's still under warranty. The first time I took it in, the warning lights had gone off on their own and there was no history of any prob, so they sent me home. But then it became more persistent, so I took it in and left it at the dealer for a week. They felt the floor damp and found corrosion on the circuit board of the PCM (onboard computer), and informed me that water damage voided the warranty, but they can replace it for approx $1,200.

Didn't have the cash to fix it. Still don't. Been driving for 6 months now without a real prob, besides no airbags, no ABS or traction stabilization.

I'm a PC technician and thought about taking out the computer and cleaning off the circuit board. Any reason I shouldn't?

Any other ideas that can help?

Thanks very much!
 

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I would.. Get a can of Deox circuit board cleaner and spray it down tooth brush it all over and hair dryer it if that doesn't work then i say it's toast.
 

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Discussion Starter #3
That’s the plan.

just trying to figure out where exactly the ECU is and how to access it.
 

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Before you go to that extreme did you pull up the carpeting under where the "dead pedal" is and check the electrical connections that are below the carpet in that area? If they got wet and then corroded it will give you those errors. ETACS is under the front dash so the water didn't get that high. I'd make darn sure all of those wiring connectors were corrosion free and good electrical continuity before ripping apart ECU boxes.
 

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Even though the water may not have reached the ETACS ECU the high humidity levels in the cabin would have caused condensation on the contacts that would lead to some level of corrosion on those contacts and any other electrical connection in the cabin, as you noted, even without submersion. For my money the best option would be to replace the affected ECU to ensure no issues in the future. As I noted in his other thread on the subject a salvage yard replacement may be cheaper but he will still be up for the cost to reset the ECU and program VIN and key codes into the replacement ECU in any case.

Personally my first port of call would have been my auto insurer to see whether the inundation was covered under my policy and let them handle the replacement.
 
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