Leon 5F facelift power fold mirror retrofit question

[LeylandVCDS]

Quick question on coding please

I recently fully retrofitted power fold mirrors to my 2019 Leon ST with power mirrors and door controllers sourced from the same 2019 donor vehicle.

Everything works absolutely fine, with the mirrors folding and unfolding without issue on both the mirror control switch and when locking/unlocking the car with the keyfob.

However, a recurrent fault keeps cropping up on VCDS - Drivers door module 42, 196726 Motor for mirror fold in - open circuit - intermittent

If the mirrors are folded with the switch and a new autoscan is done, no fault is thrown up, but it's when the mirrors are UNFOLDED with either the switch or by unlocking the car that the fault shows immediately and every time.

I've searched and searched on VAG forums and on Ross Tech's website, and can't find anything other than it seems many folk having done this retrofit find the same issue on VCDS autoscans.

Screenshot of the fault attached

As said, everything is working fine, but my OCD is in overdrive! Really want to resolve this if I can.

Many thanks

 

[cairus]

It was a English Car?

 

[LeylandVCDS]

Yes, UK car, right hand drive, exactly the same as the donor car

 

[serdar_18fr]

Quick question on coding please

I recently fully retrofitted power fold mirrors to my 2019 Leon ST with power mirrors and door controllers sourced from the same 2019 donor vehicle.

Everything works absolutely fine, with the mirrors folding and unfolding without issue on both the mirror control switch and when locking/unlocking the car with the keyfob.

However, a recurrent fault keeps cropping up on VCDS - Drivers door module 42, 196726 Motor for mirror fold in - open circuit - intermittent

If the mirrors are folded with the switch and a new autoscan is done, no fault is thrown up, but it's when the mirrors are UNFOLDED with either the switch or by unlocking the car that the fault shows immediately and every time.

I've searched and searched on VAG forums and on Ross Tech's website, and can't find anything other than it seems many folk having done this retrofit find the same issue on VCDS autoscans.

Screenshot of the fault attached

As said, everything is working fine, but my OCD is in overdrive! Really want to resolve this if I can.

Many thanks

Since the control unit that's throwing the fault is the door controller, I suspect there might be a difference between the configurations of the donor car and yours, regarding the items controlled by the door controller. So if the controller is used as it was removed from the donor car, it might be expecting a signal from a sensor that does not exist in your car and throwing the open circuit error.

If you send me VINs of both cars, I can compare the PR lists and might find a difference that could be related to door controller configurations.

 

[LeylandVCDS]

Sadly I don't have the VIN number of the donor car as it was a salvage vehicle being broken for spares.
Vehicle details are as follows:
Mine - 2019 Leon 2.0TDI SE facelift ST estate/combi 5 door
Donor - 2019 Leon 1.5TSI FR Evo facelift hatchback 5 door
Door controllers and the interior adjustment switch are from the same vehicle as the mirrors themselves - all working perfectly with no issues, only the error that shows in the VCDS scans

 

[serdar_18fr]

Sadly I don't have the VIN number of the donor car as it was a salvage vehicle being broken for spares.
Vehicle details are as follows:
Mine - 2019 Leon 2.0TDI SE facelift ST estate/combi 5 door
Donor - 2019 Leon 1.5TSI FR Evo facelift hatchback 5 door
Door controllers and the interior adjustment switch are from the same vehicle as the mirrors themselves - all working perfectly with no issues, only the error that shows in the VCDS scans

Your SE car is now using a door controller configured for an FR trim, which may have, and probably has, different hardware & features.
Without that VIN, I suppose the best shot is to find an SE similar to yours, get its door controller codings and compare them with the ones you now have in your car.

 

[serdar_18fr]

Sadly I don't have the VIN number of the donor car as it was a salvage vehicle being broken for spares.
Vehicle details are as follows:
Mine - 2019 Leon 2.0TDI SE facelift ST estate/combi 5 door
Donor - 2019 Leon 1.5TSI FR Evo facelift hatchback 5 door
Door controllers and the interior adjustment switch are from the same vehicle as the mirrors themselves - all working perfectly with no issues, only the error that shows in the VCDS scans

By the way, just realized that you already have your old controllers, if there's a VCDS or OBD11 backup, that may help in comparing.

 

[cairus]

He's taken over everything. Apart from that, the folding motor is completely stupid. Two small noses and a preloaded spring limit the travel.

 

[serdar_18fr]

He's taken over everything. Apart from that, the folding motor is completely stupid. Two small noses and a preloaded spring limit the travel.

He might have backups before he installed the new ones.

 

[cairus]

there is no setting for the folding motor which enters the circuit

 

[cairus]

My facelift FR model and my partner's normal style facelift model have exactly the same coding, adjustments, etc.

 

[LeylandVCDS]

He might have backups before he installed the new ones.

I do have backups, but the originals in the car won't be comparable, surely, as they didn't support folding mirrors - that's why I changed them

 

[serdar_18fr]

I do have backups, but the originals in the car won't be comparable, surely, as they didn't support folding mirrors - that's why I changed them

Sure, but my line of thought was that the coding items in the controller other than the ones related the folding mirrors might be causing the fault.

 

[serdar_18fr]

My facelift FR model and my partner's normal style facelift model have exactly the same coding, adjustments, etc.

That is the expected case. His car is not an FR though. And SE might be different than the "normal style" that you checked.

 

[LeylandVCDS]

Here's an original scan with the old door controllers and non-powered mirrors fitted

 

[LeylandVCDS]

Sure, but my line of thought was that the coding items in the controller other than the ones related the folding mirrors might be causing the fault.

Even though the fault is specifically open circuit motor for folding mirror, always intermittent?

 

[serdar_18fr]

Even though the fault is specifically open circuit motor for folding mirror, always intermittent?

Fault descriptions are not always straightforward and leading to the right path.
Maybe it is a long shot but I would have checked and crossed that possibility.

 

[LeylandVCDS]

OK here are the comparisons:
Original 42 drivers: 00100220C002020000001000 (original controllers, non powered mirrors)
New 42 drivers: 001402205001020000001000 (new controllers, powered mirrors)

Original 52 passenger: 00100020CE01020000001000 (original controllers, non powered mirrors)
New 52 passenger: 001400205E01020000001000 (new controllers, powered mirrors)

Hope someone can marry these up to what the individual bits and bytes mean

Thanks

 

[cairus]

Das ist der erwartete Fall. Sein Auto ist allerdings kein FR. Und SE könnte sich vom „normalen Stil“, den Sie überprüft haben, unterscheiden.

Übersetzungsfehler

1x Fr
1x Style

 

[serdar_18fr]

OK here are the comparisons:
Original 42 drivers: 00100220C002020000001000 (original controllers, non powered mirrors)
New 42 drivers: 001402205001020000001000 (new controllers, powered mirrors)

Original 52 passenger: 00100020CE01020000001000 (original controllers, non powered mirrors)
New 52 passenger: 001400205E01020000001000 (new controllers, powered mirrors)

Hope someone can marry these up to what the individual bits and bytes mean

Thanks

I already got that from the files you attached before and started to working on it, with the individual bit descriptions from OBD11 long coding pages for my previous car, a 2018 Leon FR