Good for the dealer, that is the right thing to do. If it doesn't act up the first day ask them to keep it for another until it shows the issue.
Eh, I have spent decades in the computer industry, and I am not buying the "ECM Overheat" line. You don't get selective failure with overheat. All sorts of stuff goes south because the processor cannot perform operations, all operations. Look up "BSOD" if you have never experienced it with your computer.
I would go more with power loss to the servo, or a bad servo, or even a bad driver circuit to the servo. Any of the three would cause the 'lock up' condition you describe.
Don't doubt there may be a thermal problem, but those usually show up during summer months and will affect multiple functions. Back in 1980 I had an Oldsmobile Omega that when the summer temps hit Houston it was not unusual to find the antennae going up and down, the dash lights flashing, all sorts of weird stuff until the AC finally got cool air into the ECM. Then everything settled down.
Point being that when overheated, everything goes weird, not just one specific function.
Actually, I thought about it and I believe ours was an '81 also. A special order oddball, it was the Brougham coupe, 4cyl with a standard. Wife and I were both working in Houston and living out to the southwest. 75 miles a day round trip to work, about an hour and a half each way. We were just married and the gas mileage on that car was really good for it's time and saved us some serious cash. Even more surprising was how that thing was eerily quiet on the highway at the nationally mandated 55mph speed limit. I mean, like, spooky quiet.
Any resolution ?I mentioned this recall to the service writer. At the time I didnt have the vehicle to look at the manufacture date but I just bought it 10/31. While it may not fall under this recall, certainly possible its the same cause which is why I mentioned it to the dealer.
The code my car had was 1603 ECU thermal protection. Dealer cleared the code, did an extended test drive (let the technician drive it home) and the code didnt return. I just got the car back and today was my first opportunity to drive it. No lock up yet, but I only drove 30 miles. The dealer isnt claiming to have done any work but they may have checked this wiring since it was a known issue (and I brought it up). Since its not replacement of any parts it wouldnt be notated on my receipt. Hats off to this dealer though. Even though Hyundai said "give it back" they did the extended test drive, gave me a free loaner, etc. They seem concerned to get it fixed but dont have the approval to replace any parts at this point (which I understand).
It's certainly not ideal, but have you considered picking up a GoPro and mounting it on your seat area? Hopefully it can catch the lock happening and give them at least something to review on video.Hyundai customer care finally called me January 7th. So much for the 3-5 days they promised. Basically they didnt offer any assistance other than take it to a dealer if you have a concern. I went through the story with him and his demeanor was basically "what do you want me to do". He even asked something along the lines of what needs to happen for me to close this ticket. Anyway, no real help.
Steering wheel did lock up again so now its back to the dealer for the 3rd time.
My thoughts exactly. Especially in the event of an accident for insurance purposes since Hyundai hasn't been able to find anything wrong. I imagine they would claim driver error and leave you with the bills.It's certainly not ideal, but have you considered picking up a GoPro and mounting it on your seat area? Hopefully it can catch the lock happening and give them at least something to review on video.