[Bsilver]

Hey folks, I have a very odd problem with the vehicle for which I have tried various methods/permutations to get it fixed which I am unable to do so from the past 5 months, hence referring here for help.

Overview: The vehicle had a problem with the cruise control after changing the ECU which was fried. The ECU was matched to the VIN, the Instrument Cluster, Immobilizer are untouched and are the same ones which are before. After changing the ECU, the cruise control stalk was not working, and then the BCM was programmed with respect to another car with almost the same BCM number ( a letter different), and the cruise control started to work. But the mirror adjustment stalk is malfunctioning as of now. All this was done at Carmed Bangalore.

Malfunction: When in the closed position the mirrors are open, and when in the L/R position the mirrors are closed, and adjustment is allowed, which does not do any help in adjusting. The vehicle is driven by 2 different people, and adjusting the mirrors in such a way is not a solution. Carmed/and me, tried all the ways possible, and even got it back to the same coding as it was before, and still the module refuses to adjust in the open position. It is quite skeptical to both me and the guys at Carmed, for a problem which they have not encountered before, and I do not blame them for this.

Methods tried:
In the Central Electrics, the drop down list has the BCM itself, RLS, Steering Controls, 4 door modules, which are mainly the controllers for the window regulator. The Driver door bearing the part number: 6R0 959 802 EF.
The OEM coding, before anything was done was all zeroes. If we input all 0,s under the long coding for the driver door module, the passenger window is operated when the switch for the driver window is pressed, and the driver window is operated, when the switch for the passenger window is pressed, and I am referring to the main controller on the driver side which is doing this. The individual controller for the passenger side window regulator is operating fine, and opens/closes the passenger side itself. So when we changed the coding to 010000 the problem is solved. And in both this issues, the mirror problem still persists. Various codes were tried by me, including changing each and every bit from 0 to F in all entries, but neither of it gets the both mirrors to be folding when in closed position. Some codes will get only one mirror to close in the close position, leaving another one open. Adjustments are fine and working as usual in the L/R position albeit the mirrors being closed which does not serve any purpose for adjusment.

The other door controllers are all working fine and as supposed to, only the driver door is messed. After all this permutations, and having all OEM codes put back as well, still the problem is not sorted, which leaves me and the guys at Carmed in confusion as to why this is occurring. All other functions of BCM are working fine.

Will be needing suggestions for the same, flashing back the OEM coding is also done, so any other coding, if at all required would be of great help. I will attach a scan of the BCM down here which was taken by me pre and post the problem:
This is post the BCM flash which was from a similar model.
Address 09: Cent. Elect. (J519) Labels:. 7E0-937-BCM-V1.clb
Part No SW: 7E0 937 089 A HW: 7E0 937 089
Component: BCM PQ25 MMI4 H81 0744
Revision: BB081001 Serial number: 0972 205160535
Coding: 3A904AF808A10400013806D27FEB8681FB8070FF608E58C031 0000030800
Shop #: WSC 01234 785 00200
VCID: 3169A0C36829530EAC-8064

Subsystem 1 - Part No: 5K7 955 559 C Labels: 5K7-955-559.CLB
Component: RLS 090916 04 42 0106
Coding: 0668DD

Subsystem 2 - Part No SW: 6R0 959 802 EF HW: 6R0 959 802 EF Labels: 6R0-959-802.CLB
Component: J386__TSG_FT 023 2261
Serial number: 13102848160905160658
Coding: 010000

Subsystem 3 - Part No SW: 6R0 959 801 ED HW: 6R0 959 801 ED Labels: 6R0-959-801.CLB
Component: J387__TSG_BT 023 2261
Serial number: 13202849160906181953
Coding: 000000

Subsystem 4 - Part No SW: 5E0 919 719 C HW: 5E0 919 719 C
Component: E221__MFL-PR6 H05 0130
Serial number: 000000000A2229250816
Coding: 000000

Subsystem 5 - Part No SW: 6R0 959 811 S HW: 6R0 959 811 S
Component: J388__TSG_HL 022 1261
Serial number: 13102728160828114039
Coding: 000000

Subsystem 6 - Part No SW: 6R0 959 812 S HW: 6R0 959 812 S
Component: J389__TSG_HR 022 1261
Serial number: 13202729160822133717
Coding: 000000

Pre Flash:
Address 09: Cent. Elect. (J519) Labels:. 7E0-937-BCM-V1.clb
Part No SW: 7E0 937 089 A HW: 7E0 937 089
Component: BCM PQ25 MMI4 H81 0744
Revision: BB081001 Serial number: 0972 205160535
Coding: 3A904AFF08A10000013806D27FEB0681FB8070FF608618C031 0000030800
Shop #: WSC 01234 785 00200
VCID: 3169A0C36829530EAC-8064

Subsystem 1 - Part No: 5K7 955 559 C Labels: 5K7-955-559.CLB
Component: RLS 090916 04 42 0106
Coding: 0228DD

Subsystem 2 - Part No SW: 6R0 959 802 EF HW: 6R0 959 802 EF Labels: 6R0-959-802.CLB
Component: J386__TSG_FT 023 2261
Serial number: 13102848160905160658
Coding: 000000

Subsystem 3 - Part No SW: 6R0 959 801 ED HW: 6R0 959 801 ED Labels: 6R0-959-801.CLB
Component: J387__TSG_BT 023 2261
Serial number: 13202849160906181953
Coding: 000000

Subsystem 4 - Part No SW: 5E0 919 719 C HW: 5E0 919 719 C
Component: E221__MFL-PR6 H05 0130
Serial number: 000000000A2229250816
Coding: 000000

Subsystem 5 - Part No SW: 6R0 959 811 S HW: 6R0 959 811 S
Component: J388__TSG_HL 022 1261
Serial number: 13102728160828114039
Coding: 000000

Subsystem 6 - Part No SW: 6R0 959 812 S HW: 6R0 959 812 S
Component: J389__TSG_HR 022 1261
Serial number: 13202729160822133717
Coding: 000000

Do ignore the coding in RLS, as I had done it for the window closing during rain.

Happy Motoring!

[audioholic]

Was the engine controller replaced or the BCM? The best way to figure out this problem is to visit the ASC, make some friends and run a guided function to install a new BCM. That would solve the issue if it’s really got to do with wrong coding or initialisation. Else you need a place with ODIS and an online account login which can do the job for you. If that’s also not solving the issue, then a new BCM + setup via ODIS.

I’m no expert in this but from my limited experience of playing around with coding and parts, I can say this - The part number or the suffix letter has no bearing on the compatibility of the part especially with complex parts such as ECUs which have software in them. In addition to the coding values, there is also an additional layer of parameters thats flashed into these ECUs so totally there are three aspects from the software side - 1. Firmware, 2. Parameters, 3. Coding and in newer ECUs 4. Adaptations as well. All these four should be consistent to get the intended behaviour. A mismatch in any one will lead to issues.

In your case, 1 should not be a problem and you say 3 has been tweaked. Hence my doubt is on the parameters which you say that a different BCM with a suffix was programmed into yours. Thats most likely the issue since if the parameters (also referred to as dataset) was different and not what your car actually needs. This is VIN specific or specific to the installations in your vehicle. So that’s only possible via ODIS online setup where it will access the database of your car online and get the right dataset for it. Other methods may or may not work.

[Bsilver]

Originally Posted by audioholic

Was the engine controller replaced or the BCM? The best way to figure out this problem is to visit the ASC, make some friends and run a guided function to install a new BCM.

The ECU was replaced, nothing else has been touched. The ECU was programmed through ODIS where it downloads the VIN specific data and it is how I got the ECU to work without having to replace any other part. The BCM was rolled back to the same VIN data after encountering the mirror problem as well, but then it still does not work, provided it was the same exact thing which comes from the factory. Hence the question arises, if the BCM is stock and has ODIS VIN downloaded data on it, and also inputs of the codes are stock, it should revert back to the same behavior, which unfortunately is not happening. I am pretty sure ASC also would have done the setup of BCM by online VIN specific coding, which anyways has not worked. A new BCM for a small problem, whereas all the other things are perfect, does not make sense financially to me. I do not want to switch the wires to the controller as well, some have already said to figure which wire is for the close position, L/R adjustment, and switch them, which I do not intend to do so. I will try going to the ASC, and do one more programming and hope it works. Thanks for your inputs.

Happy Motoring!

[audioholic]

Originally Posted by Bsilver

The ECU was replaced, nothing else has been touched. The ECU was programmed through ODIS where it downloads the VIN specific data and it is how I got the ECU to work without having to replace any other part. The BCM was rolled back to the same VIN data after encountering the mirror problem as well, but then it still does not work, provided it was the same exact thing which comes from the factory. Hence the question arises, if the BCM is stock and has ODIS VIN downloaded data on it, and also inputs of the codes are stock, it should revert back to the same behavior, which unfortunately is not happening.

I saw the codes again and the coding on the driver door module should be the culprit. Can you check that again? For the front driver and passenger door control modules, the coding cant be all zeroes, since it will have some inbuilt functions and also configurations like driving side, and functions which will change based on that. The rear doors can remain with a null coding since they dont have special functions. If someone having a Rapid can allow you to scan their door controller coding, that should give an idea if there is an issue here. Normally in MQB the door configuration gets read in via adaptations on the BCM but I overlooked the fact that your car is of the older platform.

If I search for Polo door module coding online, especially the same vintage of your car, here is what I find(even though part numbers are different)

Subsystem 2 - Part No SW: 6R0 959 802 EF HW: 6R0 959 802 EF Labels: 6R0-959-802.CLB
Component: J386__TSG_FT 023 2551
Serial number: 13102848180603140115
Coding: 350000

Subsystem 3 - Part No SW: 6R0 959 801 ED HW: 6R0 959 801 ED Labels: 6R0-959-801.CLB
Component: J387__TSG_BT 023 2551
Serial number: 13102849180605060920
Coding: 040000

It still will add to your coding of driver door module 010000 but will enable more bits. So check if this works. The HW seems to be the same so at least the label of the coding bits should be pretty accurate.

[Bsilver]

Originally Posted by audioholic

It still will add to your coding of driver door module 010000 but will enable more bits. So check if this works. The HW seems to be the same so at least the label of the coding bits should be pretty accurate.

I tried the codes mentioned by you, the problem still persists. When I enter 350000 the left mirror closes in the closed position whereas the right mirror stays open. This was also observed when I went through all the bits from 0 to F, but then does not close the mirrors. Will do a BCM programming via ODIS one more time today and let you update here. Thanks for the inputs.

Happy Motoring!

[audioholic]

Originally Posted by Bsilver

I tried the codes mentioned by you, the problem still persists. When I enter 350000 the left mirror closes in the closed position whereas the right mirror stays open. This was also observed when I went through all the bits from 0 to F, but then does not close the mirrors. Will do a BCM programming via ODIS one more time today and let you update here. Thanks for the inputs.

Happy Motoring!

Did you try coding both the left and right door control modules? They work on a common LIN bus. So it is necessary for both of them to have the right coding. Just check online for the right coding for your door modules or request a fellow rapid owner, thats the easiest way to fix the problem.

[Bsilver]

Originally Posted by audioholic

Did you try coding both the left and right door control modules? They work on a common LIN bus. So it is necessary for both of them to have the right coding. Just check online for the right coding for your door modules or request a fellow rapid owner, thats the easiest way to fix the problem.

I just coded the driver side with the 350000, will try the passenger side, hopefully fixes the issue. If it does not then one more ODIS programming trial, may fix it.

Originally Posted by audioholic

Did you try coding both the left and right door control modules? They work on a common LIN bus. So it is necessary for both of them to have the right coding. Just check online for the right coding for your door modules or request a fellow rapid owner, thats the easiest way to fix the problem.

Thanks for the inputs @audioholic. Both the mirrors are now folding in the close position. I changed the left door control module coding to 350000 as well and that solved the problem. Once again, thanks. I was just fiddling with the driver door module, completely ignoring the passenger door module, and the fact that they are on the same data bus.

Happy Motoring!

[audioholic]

Originally Posted by Bsilver

Thanks for the inputs @audioholic. Both the mirrors are now folding in the close position. I changed the left door control module coding to 350000 as well and that solved the problem. Once again, thanks. I was just fiddling with the driver door module, completely ignoring the passenger door module, and the fact that they are on the same data bus.

Happy Motoring!

The ODIS guided function for the BCM doesnt seem to have worked properly. It has cleared the coding in the door modules and hasnt set it correctly. Hence you faced this issue. Also check if there are any other functions within the doors that arent working.

[MayurS]

Although your problem is solved, I am sharing the long coding of the Central Electrics 09 control unit in rapid with BCM 7E0 937 089B for your comparison.

3A 90 4B FF 08 A1 00 00 01 38 00 D2 2E 0B 06 80 FB C0 70 6F 60 82 18 C0 31 00 00 03 08 00

Thanks

[audioholic]

Originally Posted by MayurS

Although your problem is solved, I am sharing the long coding of the Central Electrics 09 control unit in rapid with BCM 7E0 937 089B for your comparison.

3A 90 4B FF 08 A1 00 00 01 38 00 D2 2E 0B 06 80 FB C0 70 6F 60 82 18 C0 31 00 00 03 08 00

Thanks

In addition if you can share the coding of the sub modules which includes the door controllers, it would be beneficial to him. Thanks though

[fluidicjoy]

I randomly stumbled upon this thread, but I was in a similar situation a couple of years ago when I was playing around with my Polo Window Motor module codings with the hope of getting them to auto fold VCDS showed the coding as 00000 but it turns out there was a long code which the VCDS tool couldn’t read or display on that version. Changing the long code also bricked my mirror control button, but fortunately I found a resource online. Here’s my present coding for reference.



On the PQ25 Polo, Rapid, Vento, there are no independent door control modules unlike the PQ35 Jetta or newer MQB cars which have door control modules. The window modules show up under the Central Electronics in the BCM subsection.

[Bsilver]

Originally Posted by audioholic

The ODIS guided function for the BCM doesnt seem to have worked properly. It has cleared the coding in the door modules and hasnt set it correctly. Hence you faced this issue. Also check if there are any other functions within the doors that arent working.

I did check the other functions, and they all are working fine. The ODIS did not work well with BCM, not sure why though. It had worked correctly for everything else, need more information to know on why it had failed.

Originally Posted by MayurS

Although your problem is solved, I am sharing the long coding of the Central Electrics 09 control unit in rapid with BCM 7E0 937 089B for your comparison.

3A 90 4B FF 08 A1 00 00 01 38 00 D2 2E 0B 06 80 FB C0 70 6F 60 82 18 C0 31 00 00 03 08 00

Thank you for the reference, I have ticked a few options as per my liking in the long coding helper, so my code is a little different. But I will surely refer to this, if at all I mess up something in the future. The door modules do not come in the main BCM coding though, there is a subsystem drop down menu in which it appears.

Originally Posted by fluidicjoy

I randomly stumbled upon this thread, but I was in a similar situation a couple of years ago when I was playing around with my Polo Window Motor module coding with the hope of getting them to auto fold VCDS showed the coding as 00000 but it turns out there was a long code which the VCDS tool couldn’t read or display on that version. Changing the long code also bricked my mirror control button, but fortunately I found a resource online. Here’s my present coding for reference.


On the PQ25 Polo, Rapid, Vento, there are no independent door control modules unlike the PQ35 Jetta or newer MQB cars which have door control modules. The window modules show up under the Central Electronics in the BCM subsection.

Yes, the VCDS cable was not doing any help. The fact that there was a SW of an Ameo flashed to my BCM, there were some changes to the overall way on how it behaved. I had the issue back, when I tried to code in various permutations to get the mirrors to fold in, and almost bricked the BCM, it was not responding after some attempts, and the SW/HW numbers would not load up on the control module screen, I tried removing/reinstalling, did not work. Needed ODIS which then helped. Some may say that we can refer to the other cars BCM with the same HW, and then code in all the values as it is to another car, which is wrong. Audioholics previous posts show us an answer to this. I still have an issue, but can live with it, but mentioning here. Earlier to this, when the car had stock BCM programming and nothing was touched, there was always an option in the long coding helper which assigned the fog lights to be turned on when the reverse gear is engaged, however that option is not there as of now, and the fogs turn on by default. Not a big deal, but I have also been trying to figure out on how to switch this off, and need to get right with the correct coding, instead of trying Permutations. Will update once I get time to sort this. Thanks to everyone for there valuable inputs.

Happy Motoring!

[autoliebe]

I too am facing strange issues with my Skoda Rapid 1.0 TSI AT Ambition 2021.

I recently installed auto headlight module (Polo one) - the OEM switch + Chineses module with external sensor and got my vehicle coded for unlocking features. My vehicle has got BCM 89D. Following are the issues faced after this:

1. I got enabled lock / unlock honking sound through VCDS. It does honks now but not from the vehicle's horn but from the anti theft alarm siren (installed in my car from factory). This siren sounds very less compared to the trumpet horns. I would like people to suggest any remedy as to how I could route it through vehicle horns, if possible.
   
2. I got enabled the mirror folding on lock key FOB long press. It does folds now on locking, but surprisingly, when I unlock the car and put key in the ignition, the mirror auto-unfolds - however, this happens few times and does not rest of the times. I want to understand why is it so. Is it a regular feature and if yes then why is it mis-behaving and if it is not - then how come it is unfolding? Opinions and suggestions please.
   
3. Since I was installing the Auto Headlamp switch, I got enabled Coming Home and Leaving Home function through VCDS. Now, Auto Headlamp works as it should, Coming Home also works as it should (15 secs after I lock the car) but the Leaving Home function (lights on while unlocking from Key FOB) doesn't work whatsoever. I tried Gannu's programming auto headlamp switch pdf as well - but of no use. I have got frustrated now trying every damn thing . Opinions and suggestions please.

[agambhandari]

Originally Posted by autoliebe

I too am facing strange issues with my Skoda Rapid 1.0 TSI AT Ambition 2021.

I recently installed auto headlight module (Polo one) - the OEM switch + Chineses module with external sensor and got my vehicle coded for unlocking features. My vehicle has got BCM 89D. Following are the issues faced after this:

1. I got enabled lock / unlock honking sound through VCDS. It does honks now but not from the vehicle's horn but from the anti theft alarm siren (installed in my car from factory). This siren sounds very less compared to the trumpet horns. I would like people to suggest any remedy as to how I could route it through vehicle horns, if possible.
   
2. I got enabled the mirror folding on lock key FOB long press. It does folds now on locking, but surprisingly, when I unlock the car and put key in the ignition, the mirror auto-unfolds - however, this happens few times and does not rest of the times. I want to understand why is it so. Is it a regular feature and if yes then why is it mis-behaving and if it is not - then how come it is unfolding? Opinions and suggestions please.
   
3. Since I was installing the Auto Headlamp switch, I got enabled Coming Home and Leaving Home function through VCDS. Now, Auto Headlamp works as it should, Coming Home also works as it should (15 secs after I lock the car) but the Leaving Home function (lights on while unlocking from Key FOB) doesn't work whatsoever. I tried Gannu's programming auto headlamp switch pdf as well - but of no use. I have got frustrated now trying every damn thing . Opinions and suggestions please.

All your observations are correct and its working as normal.

But to correct you, there is no separate anti theft alarm in this year Rapid, it just uses the Horn, but yes the sound is quite short.

Only Mirror folding works correctly on this, not unfolding.

The chinese switch and module that you have installed, cannot be controlled from the coding of the car or VCDS. Check with the seller how to program it.

I would expect these should have been explained by whoever did the coding for you.

[autoliebe]

Originally Posted by agambhandari

there is no separate anti theft alarm in this year Rapid, it just uses the Horn, but yes the sound is quite short.

Thanks for the response agam, but mine does have one. I have myself checked its location besides the left strut mounting below the passenger side wiper blade. The hardware is there surprisingly. I am not sure how do I route the sounds to horns now.

Only Mirror folding works correctly on this, not unfolding.

Guess I will have to live with it then.

The chinese switch and module that you have installed, cannot be controlled from the coding of the car or VCDS. Check with the seller how to program it.

The seller says that coming home / leaving home doesn’t works with Skoda and only with Polo’s. But then my counter is why coming home is working and leaving home not. I guess this can only be answered through part swapping with a polo both for the part and the vehicle compatibility.