Skoda Octavia MK4 2023, 2.0TDi DSG Ambition

[giannis20vt]

make a new wire to BCM, to an empty BCM pin with a light channel and assign it as 'position lights' or 'low beam'?

Yeah, this is a very nice option. Thanks

[giannis20vt]

Just to make sure, the types of pins for the BCM connector (the one with the 73 pins) are

000979009 for the small "holes"
000979151 for the medium "holes"
000979242 for the big "holes"

Am i right ?

[iichel]

small holes are MQS, medium is MCP2.8, large is MCP6.3

[giannis20vt]

small holes are MQS, medium is MCP2.8, large is MCP6.3

Thanks.

[iichel]

Come to think about it, the one that your arrow is pointing to is likely an MCP 1.5, to the left of that is an MCP 2.8 and the far right corner is an MCP 6.3
https://www.a4-freunde.com/showwiki.php ... uebersicht

[giannis20vt]

I made a new picture.




Is this what you mean ?

[giannis20vt]

I have started the installation
First step the wiring.
I found some pins on the BCM that are associated with the "leuchte" description on the adaptmap and have no wires attached. I decided to wire 3 so I can try other ideas in the future

The BCM T73c


Removing the BCM and find the connectors


Opening the connector T73c


Wiring 3 cables to pins 35, 36, 37




Next step is adaptation.
I bought a one-year VAG PRO subscription to OBDeleven to be able to unlock the SFD of locked modules (such as the BCM) and now I'm looking a little at how to program the "leuchte" lines.
I'm a bit familiar with the "Leuchte" board adaptation method, but I still have a lot to learn.

For example those are the lines for the pin C35

Code: Select all

ENG263449-ENG259710-Leuchte 32 AMBL 2 C35-Dimming Direction DEF 32,maximize ,20
ENG263449-ENG258905-Leuchte 32 AMBL 2 C35-Dimming Direction GHI 32,maximize ,20
ENG263449-ENG260532-Leuchte 32 AMBL 2 C35-Dimming Direction JKL 32,maximize ,20
ENG263449-ENG259737-Leuchte 32 AMBL 2 C35-Dimmwert ABC 32,0 ,20
ENG263449-ENG259346-Leuchte 32 AMBL 2 C35-Dimmwert DEF 32,0 ,20
ENG263449-ENG260258-Leuchte 32 AMBL 2 C35-Dimmwert GHI 32,0 ,20
ENG263449-ENG260382-Leuchte 32 AMBL 2 C35-Dimmwert JKL 32,0 ,20
ENG263449-ENG116482-Leuchte 32 AMBL 2 C35-Fehlerort mittleres Byte DTC-DFCC 32,00 ,20
ENG263449-ENG116584-Leuchte 32 AMBL 2 C35-Lampendefektbitposition 32,00 ,20
ENG263449-ENG116480-Leuchte 32 AMBL 2 C35-Lasttyp 32,not_active ,20
ENG263449-ENG259035-Leuchte 32 AMBL 2 C35-Lichtansteuerung HD ABC 32,Always ,20
ENG263449-ENG116483-Leuchte 32 AMBL 2 C35-Lichtfunktion A 32,not active ,20
ENG263449-ENG116484-Leuchte 32 AMBL 2 C35-Lichtfunktion B 32,not active ,20
ENG263449-ENG116487-Leuchte 32 AMBL 2 C35-Lichtfunktion C 32,not active ,20
ENG263449-ENG116488-Leuchte 32 AMBL 2 C35-Lichtfunktion D 32,not active ,20
ENG263449-ENG116491-Leuchte 32 AMBL 2 C35-Lichtfunktion E 32,not active ,20
ENG263449-ENG116492-Leuchte 32 AMBL 2 C35-Lichtfunktion F 32,not active ,20
ENG263449-ENG116495-Leuchte 32 AMBL 2 C35-Lichtfunktion G 32,not active ,20
ENG263449-ENG116496-Leuchte 32 AMBL 2 C35-Lichtfunktion H 32,not active ,20
ENG263449-ENG258763-Leuchte 32 AMBL 2 C35-Lichtfunktion I 32,not active ,20
ENG263449-ENG259842-Leuchte 32 AMBL 2 C35-Lichtfunktion J 32,not active ,20
ENG263449-ENG258857-Leuchte 32 AMBL 2 C35-Lichtfunktion K 32,not active ,20
ENG263449-ENG260175-Leuchte 32 AMBL 2 C35-Lichtfunktion L 32,not active ,20

I don't know how to deal with those 2 lines
ENG263449-ENG116482-Leuchte 32 AMBL 2 C35-Fehlerort mittleres Byte DTC-DFCC 32,00 ,20
ENG263449-ENG116584-Leuchte 32 AMBL 2 C35-Lampendefektbitposition 32,00 ,20

[iichel]

I think you can ignore the error detection for now, if you install the correct type of load. Are you familiar with the writings of DV52 about the light channels?

[giannis20vt]

I think you can ignore the error detection for now, if you install the correct type of load. Are you familiar with the writings of DV52 about the light channels?

Yes, I read DV52's writings about light channels. Excellent work and understandable.
The only thing that is not clear to me is the error detection lines. If I can leave them at 0 for now, that's fine. I don't want to mess with something I don't know.
But I don't know if it will work without fixing these lines. if you know that then it's fine.

[giannis20vt]

well, first attempt for adaptation the "leuchte" lines

I unlocked the SFD with the ODBeleven and i did the adaptation with VCDS.

I tried several combinations but no one worked so far.

I tried with VCDS, then with ODBeleven. The adaptations changed but there is no change at the end of the wire C35.



Any ideas ?

[iichel]

set to different function like terminal 15, terminal 58 to try that first

[giannis20vt]

I went to my car again to try what you suggested iichel.
Without doing anything I checked to see if the cable from pin C35 was getting power and.... yes it was. It worked simultaneously with the position lights, exactly as it was in the adaptation. Immediately there was an error to the dash, something like error to light system, i don't remember exactly.
So made some other adaptations, changed to

C35


C36


C37


to check the response of each one. Nothing happened.
I finished the SFD unlock and made a fault scan.
An error appeared


So i wondering about the correct way of changing the adaptation with the SFD lock. It may take some time for the new settings to work or something similar.

[giannis20vt]

Two hours after the second attempt, the C35 working fine (i changed the "Lasttyp 32" from to "allgemaine_LED_met_Open_Load_Diagnose12W" to "LED_Kleinleistung_ohne_Open_Load_diagnose".

The error gone. But the C36 and C37 not corresponding to any change.
Possibly not working even though the Pins are present in the BCM.

I searched and found that in Golf8, pin C35 and C61 are responsible for the front LED bar on the mask. The BCM is the same in GOLF8 and OCTAVIA. Pins C36 and C37 are not used there either.

[iichel]

is there a physical pin present in the BCM?

[giannis20vt]

is there a physical pin present in the BCM?

Yes there are. All of them. (35, 36, 37)