'20 ST - Front Heated/Cooled Seats Not Working

[SFD295]

At some point my front heated/cooled Seats decided to stop working. We took a long trip and I periodically check how things are running with Forscan, and I noticed when I read the DTC's the SCME failed to read. This was new. I also got an error about the rear seat climate control, I don't recall the exact wording. We had a bunch of stuff up against the rear controls and I believe a bag was pushing multiple buttons at once, because it cleared itself once I moved everything. The SCME error did not. This coincided with the driver and passenger heated and cooled seats failing to work. No blower activation for the cooling, no heat on heating. Both seats though, which points me towards a module failure. The heated steering wheel does still work, all fuses are intact, all underseat connectors intact and plugged in, and the controls still turn on and function as they always did. All the "multi-contour" seat features still work as well, like massage.

My question is, where is the SCME and is this the likely culprit? Is it integral with the seat modules? Or is it the control module in the dash? I really can't find any information on this, though a post on the F150 site described it as integrated with the DSM now, which I understand is under the seat. I checked and pulled all relevant fuses. That did nothing. I tried to do a module reset with Forscan, but as I suspected, there's no communication with the SCME module. There is communication with every other module.

I'm stumped, and don't want to replace the wrong part. The dash controls were my original suspect, but now I'm not so sure. Thanks in advance.

 

[SFD295]

It's amazing how just typing the problem out can help fix things. I thought it through and remembered that my girl's bag ended up under my seat when the seat slid back. I pulled all the connectors off the DSM while the vehicle was off, waited about 2 mins, then replaced them. When I started the vehicle there was a delay of about 10 seconds, but all of a sudden the blowers for both cooled seats came on. So one of the connectors must have come loose. Forscan sees the SCME also. Don't know if I should delete this or if you want to leave it here mods, but for anyone who loses both climate controlled seats this may be a quick fix. Still bugs me that the seat memory and easy-entry seat continued to work, I figured that would've gone out too, but apparently not.

 

[Chamorro85]

My response was forming in my head while reading your first post. The place to look and what to try and fix the problem. Glad you figured it out. Never hurts to have a good reminder for others and you posting helped you figure it out.