I just wondered if anyone else has had had this puzzling situation:

 

2018 Superb estate L and K 190 Dsg.

 

We noticed for the first time the other evening that the passenger seat recliner wasn’t working in either direction. Complete silence, no mechanical sounds etc apart from the switch. All other seat functions ok.

But the next morning when out of curiosity I simply walked out to the car without starting it or anything, and tried it, it worked. Later on in the day same procedure, faulty again, until the next morning.....

And that is the pattern, it works first time in the morning but only then.

That recliner adjustment has probably been called on 5 times in the entire life of the car.

 

I don’t know how much control logic if any, exists on the passenger side electric seat. There’s no memory function like there is on driver side. 

But maybe there’s still enough circuitry to be a candidate for a heat fault, showing later in a warming day.

Beyond that I have no idea.

The car is at Skoda for service tomorrow and I can’t decide whether to pay an extra £60 for the technician to troubleshoot it, followed possibly by a much bigger sum to fix it, when there’s a small chance I might sort it myself.

I’ve tried giving the seat a thump when its working to see if I can induce it to stop, in case it’s a dodgy connection etc but it does not seem to be that.

 

Any advice appreciated.

 

Thanks,

Dave

 

 

sounds like a faulty seat memory driver module.

the earlier ones r known to misbehave.

 

mine was replaced under warranty about 3 yrs ago. 

 

Address 36: Seat Mem. Drvr (J810)       Labels:* None
   Part No SW: 5Q0 959 760 C    HW: 5Q0 959 760 C
   Component: Sitzmemory    H09 0024  
   Serial number: Y0006RLE37446
   Coding: 0014000000000500018280808080000000008181000000D400
   Shop #: WSC 40189 002 1048576
   ASAM Dataset: EV_SeatMemorDriveSide 002022
   ROD: EV_SeatMemorDriveSide.rod
   VCID: 3D273B8C9DFCF793584-8068

No fault code found.

Thank you JR RS

 

It’s on the passenger side which does not have the memory function.

 

 

6 hours ago, davembk said:

Thank you JR RS

 

It’s on the passenger side which does not have the memory function.

 

 

 

My passenger seat does not have memory function either....

Thanks again.

 

I’m hoping that with the passenger side having no memory function then it could be as basic as power/fuse/dual switch/motor, with maybe a couple of limit switches. Or I might be completely wrong.

I did notice that on the driver side there’s a small delay before the seat functions happen whereas the passenger side is instantaneous, making me think it might all be a bit simpler.

 

If I get some time and the determination, I might try and get to the motor and check that the 12v is reaching it.

So strange. If it’s a heat problem then in a couple of weeks it won’t even work first thing in the morning. Just going out there again 🤞🙂🤔

 

Edited 24 February, 20224 yr by davembk
Spelling mistakes

Well,

 

Still the same. In the morning it works. Try later in day, nothing. 
Following morning, fine. 
 

And that’s having the car unlocked, not driven. Just walk to the car open door, try seat and that’s it.

Have factory reset every single thing.

Thought it might even be to do with voltage level fluctuations but that’s just a guess.

 

It would be nice to fix it but who cares, it’s only a car

 

Ah well. A couple more months on. Not over fussed about it but just to say, still the same: Works  up until about 330 pm. I need to narrow it down a bit more if I can be bothered but it does look like it’s linked to a time window. So strange. As a wildcard I tried altering the vehicle time, resetting whole vehicle etc. Didn’t expect any results and got none. Earlier in year I’d thought it might be heat related ie failing when day warms up. But no, for example car in full sun today still working at 1400. But not at 1600. A real brain teaser 

I’m reasoning that there can’t be much circuitry compared with driver side as seat movement is instantaneous whereas drivers side there’s always a small delay after operating the switches  🤔 My brain has given up. I suppose I need to go in there with a multimeter and see where the voltage stops. 

The passenger side is a 'dumb' system meaning no motor regulation via sensors and such. It it simple a powered switch and a motor. No module to control it either. 

That should narrow it down to either switchpack being faulty or the motor itself. 

 

How often is the seat getting moved?

Thanks ApertureS,

 

for the confirmation that it is dumb. I think it’s time for me to get that multimeter out.

 

Hmm how often is it used 🤔 Well until we noticed it wasn’t working, probably about 3 times in 3 years. But now, probably 5 times a week when I can’t resist testing it.

It’s this time window thing that’s the puzzler. It may well be that it’s been like it from new and that the time we noticed it not working was the only time we’d used it later in the day. I’m not imagining it. It definitely ties in with a morning to mid pm time window and it seems consistent. What I’ll do is get my multimeter when it’s not working and hopefully find a point where the power is lost. Unless of course it isn’t lost and gets all the way to the motor. In which case it’s a strange motor fault 🤔 The other thing I haven’t done is recline it very far when testing in case it gets stuck at an extreme angle. Would be just my luck if it stayed broken 🤞

What makes something go faulty in the afternoon and fixed by morning? This is without the car even moved or locked/unlocked. I’ve tried it with the car left unlocked and approached with no key. I don’t even get into the car. Same results, cold days hot days dry, wet. Always ok in the morning but not in later afternoon. Then next day, all ok until late afternoon.

Reminds me of the car that didn't like vanilla ice cream