Patil's T-roc 2020 1.5Tsi evo+Dsg7 RHD

[patil]

Rear door control module MQB LIN emulator installation in my T-roc: Unsuccessful/incompatible.
Why need a LIN emulator?
VW doesn't provide the rear door control modules in many of their budget to mid range cars to save cost. One of the many advantages of having rear door control modules is in retrofitting rear door warning/ exit lamps in OEM way.
For those who do not have rear door control modules like my T-roc, have to resort to an alternative way of wiring and installing the rear door warning lamps. I personally believe, using the rear door open ground wire of the rear door lock microswitch is not safe, but there is no alternative.
Here comes the role of a LIN emulators, conceptualized by one among many Russian wizards named Roman( HackR) from drive2 forum.
Links to his post about these emulators.
https://www.drive2.ru/l/619680906197613085/
https://www.drive2.ru/market/offers/1531579

As Roman explains in his post, his emulator bypasses the use of ground wire from door lock/unlock microswitch. Instead it uses LIN bus signal from door window motor and converts to regular analogue signal to control the rear door warning lamps. This is the main reason for me buying the emulators. There are also other advantages of the emulator, like it switches off the lamp after some time in case the door is opened for prolonged time. It also emulates the light off in a gradual fading effect similar to front door warning lamps do when doors are closed.
The connection is simple. Emulator has 5 pins, 3 input and 2 output to door warning lamps.

Wiring scheme from HackR ( Google translated)



I wired it accordingly:



But unfortunately, the lamp LEDs didn't light up when door was opened. Did multimeter check, there was almost nil output ( 1.5V instead of 12V) on pin5 of emulator.
The plausible reason given by Roman is that, these MQB LIN emulators are designed based on 5Q0 front door control modules of his Tiguan. But in my T-roc, 5Q4 front door control modules are installed from factory. Probably the bytes/ bits responsible for door open/ close in LIN communications are different in 5Q0 and 5Q4 modules.
Back to square one again

I think, I will atleast try to use unused BCM pins to power up my rear door warning lamps, instead +30 from fusebox. I have received a informative document from dear master Ciclo to study about MQB lighting control adaptations of BCM... back to school again

[ciclo]

The original LED ceiling/dome lights and my old white LED footwell lights (LC72) have/had that fade-on/fade-off feature. I also had the old white LED footwell lights programmed to be ambient/auxiliary/hall/bus lights. As we all know, both lights also turn off after the preset/programmed time.
viewtopic.php?p=573840#p573840 (use logic to achieve your goals).

I think for my fall 2024 project when I wire my rear door warning/exit lights "correctly" I'll program them like that, though the bus lights are not clear to me here.
I guess later, for my winter/Christmas 2024 project I'll program them to flash intermittently to live with excitement and hope for such a beautiful season. ...

The great and only challenge for an ideal student is to find better Masters.

[patil]

The great and only challenge for an ideal student is to find better Masters.

I don't think so



Each unused pin in BCM's can be assigned to perform upto 50 different lighting functions is crazy!!
It's mind boggling how much BCM's have evolved over a decade.

[ciclo]

Each unused pin in BCM's can be assigned to perform upto 50 different lighting functions is crazy!!
It's mind boggling how much BCM's have evolved over a decade.

I think that rather than an evolution, it is about increasingly better "ordering" what was already known and what could be known in the future.
We humans, in our position of being able to change things (like gods), have good ideas, but we are a real disaster when it comes to organizing to be able to spread our ideas in a clear and concise way.

In any case, translations can sometimes lead to confusion.

I am absolutely sure that after so many years, DV52 knows with absolute certainty that they are 'exit' and not 'entry', it is logical that editing a PDF that is so old no longer makes sense. It has happened to me on many occasions. Translators are always to blame for everything.


It is a good idea to keep things in the language of the creator.

It is always better to have an open and relaxed mind in order to achieve better goals. Let's hope that no one presses a red button because the interpreter/translator or IA made a mistake in the translation... ... we could disappear because of a simple thing like this.

[patil]

Rear door exit/ warning lamps test using unused BCM pin : successful

I must thank dear Master Ciclo for pushing me in the right path of en(light)enment.

Previously tested white LED lamps as footwell lights viewtopic.php?p=598520#p598520
Using the same BCM pin t73a /72, commanded this pin to work as rear left door exit/ warning lamps by adjusting adaptations Leuchte30FR LC72.

Code: Select all

Adaptation/parameter	RDID	Current value	Input	Unit
[VO]_Leuchte30FR LC72	$056E			
  [LO]_Lasttyp 30	  	  [VO]_36 - LED Kleinleistung	  	  
  [LO]_Lampendefektbitposition 30	  	  0	  	  
  [LO]_Fehlerort mittleres Byte DTC-DFCC 30	  	  2	  	  
  [LO]_Lichtfunktion A 30	  	  [VO]_Tuerausstiegslicht hinten links	  	  
  [LO]_Lichtfunktion B 30	  	  [VO]_nicht aktiv	  	  
  [LO]_Dimmwert AB 30	  	  100	  	  
  [LO]_Lichtansteuerung HD AB 30	  	  [VO]_always	  	  
  [LO]_Lichtfunktion C 30	  	  [VO]_nicht aktiv	  	  
  [LO]_Lichtfunktion D 30	  	  [VO]_nicht aktiv	  	  
  [LO]_Dimmwert CD 30	  	  0	  	  
  [LO]_Dimming Direction CD 30	  	  [VO]_maximize	  	  
  [LO]_Lichtfunktion E 30	  	  [VO]_nicht aktiv	  	  
  [LO]_Lichtfunktion F 30	  	  [VO]_nicht aktiv	  	  
  [LO]_Dimmwert EF 30	  	  0	  	  
  [LO]_Dimming Direction EF 30	  	  [VO]_maximize	  	  
  [LO]_Lichtfunktion G 30	  	  [VO]_nicht aktiv	  	  
  [LO]_Lichtfunktion H 30	  	  [VO]_nicht aktiv	  	  
  [LO]_Dimmwert GH 30	  	  0	  	  
  [LO]_Dimming Direction GH 30	  	  [VO]_maximize	  	  

My observations:
The light goes off after few minutes simultaneously along with interior lights, when door is kept open. I played with adaptations to bring in slow fading effect when door is closed, but couldn't figure it out. We will need 2 unused BCM pins to control each of rear door exit/ warning lamps.
Finally, I achieved what I was aiming for, OEM way of controlling rear door warning lamps
I will do rewiring of rear door warning/exit lamps at convenient time.
Emulators be damned

[ciclo]

🕉

Super congratulations!, I am very glad to know that you have succeeded.


As I already told you by email, to finally earn your place in the Olympus of the Gods ..., I think you should 'search' with the search terms 'Tuer' and/or 'Interior_light_' in the Protocol Diagnostics of your 'Exceptional' TRoc.
Perhaps, with patience and using a good translator if necessary, you can find in all those 'highlighted' adaptation channels something related to the slow fading effect for these lights. I guess it should be activated in 'decimal value/percentaje' or 'active/not active' in one of those channels.

[giannis20vt]

I am following this particular thread with great interest. Congratulations to both of you for the efforts and knowledge you offer us. Thank you very much.
I was interested in the specific part with the lighting of the doors on the way out. (door warning lamps)
I am thinking of using it for another reason (similar and of course related to lighting). More on my own thread so as not to spoil Patil's thread.

https://www.uk-polos.net/viewtopic.php? ... a&start=60

[patil]

🕉

Super congratulations!, I am very glad to know that you have succeeded.


As I already told you by email, to finally earn your place in the Olympus of the Gods ..., I think you should 'search' with the search terms 'Tuer' and/or 'Interior_light_' in the Protocol Diagnostics of your 'Exceptional' TRoc.
Perhaps, with patience and using a good translator if necessary, you can find in all those 'highlighted' adaptation channels something related to the slow fading effect for these lights. I guess it should be activated in 'decimal value/percentaje' or 'active/not active' in one of those channels.

Thank you so much for the kind words dear Master
I am working on adaptations to successfully implement slow dimming effect, I will surely post if get a breakthrough

@giannis20vt , thank you and you can ask/ post anything which you feel useful in my thread, no problem.

[patil]

OEM frameless autodimming IRVM: Improvised to perfection

Previously, I had modified the OEM frameless autodimming IRVM to fit in my T-roc. But the result was not perfect.viewtopic.php?p=605327#p605327
After carefully studying and taking measurements of the mirror ball- socket mounts of both my T-roc and new frameless mirror, I realised that, ball- socket mounts are almost identical.
I decided to buy a new frameless autodimming mirror with a different part number this time 3G0857511AD. Compared to previous frameless mirror 3G0 AC, the AD version supports sidemirror autodimming function as it has 2 additional pins. Though, AC version can also be modified in PCB by soldering 2 new wires to support side mirror autodimming. I know that, Octavia MK3 side mirrors did came with autodimming side view mirrors from the factory, they are perfect fit (1:1) for MK1 T-roc. If I get hold of those autodimming side mirrors, I will retrofit them, as new AD version frameless IRVM supports it. For now, blue tinted, heated and with integrated blinkers I got from AliExpress are doing great job

This time I took a pragmatic approach. Decided to swap the stock T-roc IRVM mount with new frameless IRVM. For this, I had to dismantle both the mirrors completely
With few expired credit/debit cards, heat gun and lot of patience, it is fairly easy job to dissemble the mirrors without damaging. Luckily, the ball-socket locking units of both mirrors turned out to be identical twins!

Stock T-roc IRVM completely dissambled:



New frameless IRVM dissambled







Comparison of lock mounts, both are similar except for the length. Top T-roc, bottom new frameless IRVM.



Replaced the lock mount of frameless IRVM with T-roc mount. Perfect swap



Final result: Comparison. Left, frameless IRVM with T-roc IRVM lock mount.



The result is very satisfying Everything is perfect, new frameless IRVM can be moved and adjustable freely like IRVM from factory



Heartfelt thanks to dear friend Szymon for helping me to get new frameless IRVM