T6 OEM LED-headlight retrofit

[Grim Reaper]

I guess the only way to prove it would be to put a scope on it and see if the feed is PWM.

 

[Andy_dea]

My rear lights are t6.1 leds, again no coding was needed for them, just resistors in the looms to stop any bulb warning light on the dash

 

[Dayoster]

I forgot that my retrofit was from twin H7 to LED and I didn't take in consideration upgrade from H4.
So complete VCDS coding for LED upgrade/retrofit from either H4 or twin H7 should be as follows
Byte 18 bit 0 1
Byte 18 bit 1 1
Byte 18 bit 2 0
Byte 18 bit 3 0
Byte 18 bit 4 1
Byte 18 bit 5 1
Byte 18 bit 6 1
Byte 18 bit 7 0
Byte 21 bit 0 1
Byte 22 bit 2 0
Byte 22 bit 4 1
Byte 23 bit 5 0

am i correct in assuming that the 0 or 1 at the end of each line means whether the bit should be ticked or not?

 

[Robert]

am i correct in assuming that the 0 or 1 at the end of each line means whether the bit should be ticked or not?

100% correct

 

[Dayoster]

Iv installed my led lights and wired them up, changed the bcm coding to what was mentioned in previous posts by Robert. But im having issues.

everythings works as it should with ignition on, but wheni start the van the dipped beam goes off after 5seconds and wont come back on. If i hold full beam the headlights go wappy.

tried a battery d/c.

original headlights were h4.


original coding
A0AC393A0A61341193284F746CEB8E740F84710F60CC6D60330400230840

current coding
A0AC393A0A61341193284F746CEB8E740F84730F60CD7940330400230840

If anyone could help that would be great. Cannot drivein the dark at the moment

 

[scotia]

Iv installed my led lights and wired them up, changed the bcm coding to what was mentioned in previous posts by Robert. But im having issues.

everythings works as it should with ignition on, but wheni start the van the dipped beam goes off after 5seconds and wont come back on. If i hold full beam the headlights go wappy.

tried a battery d/c.

original headlights were h4.


original coding
A0AC393A0A61341193284F746CEB8E740F84710F60CC6D60330400230840

current coding
A0AC393A0A61341193284F746CEB8E740F84730F60CD7940330400230840

If anyone could help that would be great. Cannot drivein the dark at the moment

Just an idea as I don't know but maybe the same as here: https://www.t6forum.com/threads/t6-led-headlight-retrofit.2460/post-318902

Byte 16?

 

[Pauly]

Iv installed my led lights and wired them up, changed the bcm coding to what was mentioned in previous posts by Robert. But im having issues.

everythings works as it should with ignition on, but wheni start the van the dipped beam goes off after 5seconds and wont come back on. If i hold full beam the headlights go wappy.

tried a battery d/c.

original headlights were h4.


original coding
A0AC393A0A61341193284F746CEB8E740F84710F60CC6D60330400230840

current coding
A0AC393A0A61341193284F746CEB8E740F84730F60CD7940330400230840

If anyone could help that would be great. Cannot drivein the dark at the moment

That’s standard behaviour before coding them in

 

[Dayoster]

That’s standard behaviour before coding them in

Iv done the coding as mentioned in previous posts

 

[Flyingspanner]

Anyone provide them as struggling to find one ?

You can buy my one as 2019 has dimming done from dash photo sensor not rotary button.

 

[Flyingspanner]

Iv done the coding as mentioned in previous posts

Looking at the code you posted, you still have the same 16 as your original code?

 

[Dayoster]

T6 OEM LED-headlight retrofit

Thanks a lot, really helped out. Im using the halogen sidelight signal pin 10 to supply the LED headlight pins 10 and 12. But when fitted this into the car, the DRL works fine, with the engine off. As soon as the engine is on, the DRL flickers on and off. I checked voltages and the with...

www.t6forum.com

this is the coding list i followed, no byte 16 modification

 

[Flyingspanner]

Did you run the two new wires from pin 5&6 J519 plug B (white plug if my memory serves) to pin 10 L &R headlight plug?

 

[Dayoster]

56 + 28 to pin 14 at headlights
and 5 + 6 to pin 10 at headlights

 

[Dreynolds10]

Byte 16 is to switch off lamp monitoring otherwise you will likely get a warning light on the dash. (C0 is the new value).

Your byte 23 looks different. Mine is 60 (the same as your original) but your new code is showing 40.

Not sure if that will make a difference.

Have you fitted level sensors as well?

 

[Flyingspanner]

Try C0 in 16, bits 0 to 3 only show up in L2 coding helper on my standard coding.

 

[Robert]

Iv installed my led lights and wired them up, changed the bcm coding to what was mentioned in previous posts by Robert. But im having issues.

everythings works as it should with ignition on, but wheni start the van the dipped beam goes off after 5seconds and wont come back on. If i hold full beam the headlights go wappy.

tried a battery d/c.

original headlights were h4.


original coding
A0AC393A0A61341193284F746CEB8E740F84710F60CC6D60330400230840

current coding
A0AC393A0A61341193284F746CEB8E740F84730F60CD7940330400230840

If anyone could help that would be great. Cannot drivein the dark at the moment

Try value 77 in Byte 18, but can you also quote your both power module part numbers?

 

[Dayoster]

4G0907697G
7PP941571AC

Byte 16 is to switch off lamp monitoring otherwise you will likely get a warning light on the dash. (C0 is the new value).

Your byte 23 looks different. Mine is 60 (the same as your original) but your new code is showing 40.

Not sure if that will make a difference.

Have you fitted level sensors as well?

No not at the monent, just the headlights but ill be doing the level sensors in a month or 2

 

[Grim Reaper]

Central Electrics (Module 09)
rewrite your coding string to
A0AC393A0A61341193284F746CEB8E74D084730F60CD7940330400230840

this has the changed D0 in byte 16

 

[Grim Reaper]

Byte 16 is to switch off lamp monitoring otherwise you will likely get a warning light on the dash. (C0 is the new value).

Your byte 23 looks different. Mine is 60 (the same as your original) but your new code is showing 40.

Not sure if that will make a difference.

Have you fitted level sensors as well?

Byte 23 relates to things like whether your fog lights stay on with high beams and so on, they could well be different depending on preferences.


0.

Byte 23 Bit 0 Alternative Voltage Supply for High Beam and Terminal 58d​

1. Byte 23 Bit 1 Rear fog light (NSL) in high beam (FL) inactive (Nebelschlusslicht (NSL) bei Fernlicht (FL) inaktiv)
2. Byte 23 Bit 2-3 00 Daytime running lights (TFL) via exit for daytime running lights (TFL) (Tagfahrlicht (TFL) über Ausgang für Tagfahrlicht (TFL))
3. Byte 23 Bit 4 Daytime running light (TFL) is switched off when the handbrake is pulled (Abschaltung Tagfahrlicht (TFL) bei gezogener Handbremse)
4. Byte 23 Bit 5 Daytime running lights with parking light (Tagfahrlicht bei Standlicht)
5. Byte 23 Bit 6 Function "Daytime Running Light (DRL)" active
6. Byte 23 Bit 7 Switch off the daytime running lights when the turning lights active (Tagfahrlicht beim Blinken abschalten)

(credit to andys for codes list)​

 

[Dayoster]

Problem fixed by changing byte 16 to D0