LED tail lights coding

charly · Mar 29, 2017

Hi All
Does anyone know or had dealings with replacing normal rear light clusters for the new LED units.
I have a couple of new sets of LED clusters and I have a 2014 Yeti, the lights are a direct replacement and connecting plugs are the same.
The usual problems occur with bulb failure warnings even though everything works great.
I am not too sure resistors are the way to go as Yetis have 2 x 21w standard tail bulbs in each side and ohms law works it out that I will need a 36w 4ohm load resistor which are available in 50w units to make up the missing current draw as the LEDS for back driving lights only draw 400ma which is 6w.
I am told its possible to code the new LED clusters with VCDS but I guess this will be in the dreaded byte 18 and to be honest I am very apprehensive to play around with byte 18 in case I end up with a mess I cannot get out of or worse damage my BCM.
if anyone knows how this can be done I would be very grateful for a few pointers or maybe it would be better to get them coded by the stealer.

Regards
Charly

Dana · Mar 29, 2017

Hi Charly,

Please post the Auto-Scan. That will show us if nasty Byte 18 has the real value shown -or- if they masked with a pair of 00s. The scan will also include the brand and software level of the BCM in the event that coding modifications are relevant like the Mk6 Golf.

charly · Mar 29, 2017

Hi Dana
Thanks for the quick reply the scan is below its an old scan but nothing has changed since I took it except a media interface so the info should be here or I can take a fresh one if needed.

Code:

Sunday,03,August,2014,17:35:32:17123
VCDS -- Windows Based VAG/VAS Emulator
VCDS Version: 12.12.2.0 (x64)
Data version: 20140212




VIN: TMBMD75L8F6015255  




Chassis Type: 5L (7N0)
Scan: 01 03 08 09 10 15 16 17 19 22 25 37 42 44 46 52 56 62 72 77
         


VIN: TMBMD75L8F6015255   


01-Engine -- Status: OK 0000
03-ABS Brakes -- Status: OK 0000
04-Steering Angle -- Status: OK 0000
08-Auto HVAC -- Status: OK 0000
09-Cent. Elect. -- Status: OK 0000
10-Park/Steer Assist -- Status: OK 0000
15-Airbags -- Status: OK 0000
16-Steering wheel -- Status: OK 0000
17-Instruments -- Status: OK 0000
19-CAN Gateway -- Status: OK 0000
22-AWD -- Status: OK 0000
25-Immobilizer -- Status: OK 0000
37-Navigation -- Status: OK 0000
42-Door Elect, Driver -- Status: OK 0000
44-Steering Assist -- Status: OK 0000
46-Central Conv. -- Status: OK 0000
52-Door Elect, Pass. -- Status: OK 0000
56-Radio -- Status: OK 0000
62-Door, Rear Left -- Status: OK 0000
72-Door, Rear Right -- Status: OK 0000
77-Telephone -- Status: OK 0000
 
-------------------------------------------------------------------------------
Address 01: Engine (J623-CFHC)       Labels: 03L-906-018-CFF.clb
   Part No SW: 03L 906 018 QL    HW: 03L 907 309 AG
   Component: R4 2,0L EDC   H25 6890  
   Revision: 42H25---    Serial number:               
   Coding: 00190012042700080000
   Shop #: WSC 33361 790 00098
   ASAM Dataset: EV_ECM20TDI01103L906018QL 003005
   ROD: EV_ECM20TDI01103L906018QJ.rod
   VCID: 840CFD900F597C3E3FF-80D1


No fault code found.
Readiness: N/A


-------------------------------------------------------------------------------
Address 03: ABS Brakes (J104)       Labels: 1K0-907-379-60EC1F.clb
   Part No SW: 1K0 907 379 BM    HW: 1K0 907 379 BM
   Component: ESP MK60EC1   H46 0164  
   Revision: 00H46001    
   Coding: 933F400E092301FFC90D02E9901E8082A0000021
   Shop #: WSC 33361 790 00098
   VCID: 7EF80F78E9B596EEE9B-802B


No fault code found.


-------------------------------------------------------------------------------
Address 08: Auto HVAC (J255)       Labels: 5K0-907-044.clb
   Part No SW: 3T0 907 044 CD    HW: 3T0 907 044 CD
   Component: Climatronic   H19 0709  
   Revision: 00001009    
   Coding: 0010000002
   Shop #: WSC 33361 790 00062
   ASAM Dataset: EV_Climatronic A01010
   ROD: EV_ClimaAutoBasis_SE36.rod
   VCID: 76E81758C985DEAEB1B-8023


No fault code found.


-------------------------------------------------------------------------------
Address 09: Cent. Elect. (J519)       Labels: 1K0-937-08x-09.clb
   Part No SW: 1K0 937 086 AA    HW: 1K0 937 086 AA
   Component: BCM PQ35  M   112 0771  
   Revision: AF112771    
   Coding: 48000ABCA05BF1C0400800C0510001EC4B0000AE724D8160E48140000040
   Shop #: WSC 33361 790 00098
   VCID: 6FE6223CBEDFEF6672D-803A


   Subsystem 1 - Part No: 5L2 955 119 B  Labels: 1KX-955-119.CLB
   Component: SK356  26  0610 
   Coding: 00F7B5


   Subsystem 2 - Part No: 1K8 951 171 
   Component: DWA-Sensor 00  001 0104 


   Subsystem 3 - Part No: 1K0 951 605 C
   Component: LIN BACKUP HO  H05 1501 


No fault code found.


-------------------------------------------------------------------------------
Address 10: Park/Steer Assist (J446)       Labels: 5J0-919-475.clb
   Part No SW: 5J0 919 475 B    HW: 5J0 919 475 A
   Component: PARKHILFE 4K  H11 0010  
   Revision: --H11---    Serial number: 32901417401696
   Coding: 108007
   Shop #: WSC 33361 790 00098
   ASAM Dataset: EV_EPHVA14SKxxx0000 002001
   ROD: EV_EPHVA14SKxxx0000.rod
   VCID: 346CED509F798CBE4FF-8061


No fault code found.


-------------------------------------------------------------------------------
Address 15: Airbags (J234)       Labels: 5K0-959-655.clb
   Part No SW: 5C0 959 655 B    HW: 5C0 959 655 B
   Component: AirbagVW10    014 0613  
   Serial number: 003G5RATAR0+  
   Coding: 00004E42
   Shop #: WSC 33361 790 00098
   ASAM Dataset: EV_AirbaVW10SMEVW360 A01014
   ROD: EV_AirbaVW10SMEVW360.rod
   VCID: 3162E444606BB996249-8064


   Crash sensor for side airbag; driver side: 
   Subsystem 1 - Part No SW: 5K0 959 354     HW: 5K0 959 354 
   Component: S.Sens.Fahr.V  H02 ---- 
   Serial number: 3572MSME312B2B45ZZZW


   Crash sensor for side airbag; passenger side: 
   Subsystem 2 - Part No SW: 5K0 959 354     HW: 5K0 959 354 
   Component: S.Sens.Beif.V  H02 ---- 
   Serial number: 3582MSME472A2B45ZZZ$


   Crash sensor for side airbag; rear driver side: 
   Subsystem 3 - Part No SW: 5K0 959 351 A    HW: 5K0 959 351 A
   Component: S.Sens.Fahr.H  H02 ---- 
   Serial number: 3516KSME68024A2FZZZ-


   Crash sensor for side airbag; rear passenger side: 
   Subsystem 4 - Part No SW: 5K0 959 351 A    HW: 5K0 959 351 A
   Component: S.Sens.Beif.H  H02 ---- 
   Serial number: 3526KSME5458372FZZZ$


No fault code found.


-------------------------------------------------------------------------------
Address 16: Steering wheel (J527)       Labels: 5K0-953-569.clb
   Part No SW: 5K0 953 521 DQ    HW: 5K0 953 569 AH
   Component: LENKS.MODUL   016 0140  
   Revision: FF010042    Serial number: 20140619100569
   Coding: 1082140000
   Shop #: WSC 33361 790 00098
   ASAM Dataset: EV_SMLSNGVOLWSXS A01004
   ROD: EV_SMLSNGVOLWS.rod
   VCID: 7EF80F78E1B596EEE9B-802B


   Multi Function Steering Wheel Control Module: 
   Subsystem 1 - Part No SW: 5E0 919 719 F    HW: 5E0 919 719 F
   Component: E221__MFL-PR6  H04 0130 
   Coding: 820000


No fault code found.


-------------------------------------------------------------------------------
Address 17: Instruments (J285)       Labels: 5K0-920-xxx-17.clb
   Part No SW: 5L0 920 940 P    HW: 5L0 920 940 P
   Component: KOMBI         H02 0905  
   Serial number: 00000000000000
   Coding: 420E01
   Shop #: WSC 33361 790 00098
   ASAM Dataset: EV_Kombi_UDS_VDD_RM09 A04727
   ROD: EV_Kombi_UDS_VDD_RM09_SE35.rod
   VCID: 3972DC64B81B71D69C9-806C


No fault code found.


-------------------------------------------------------------------------------
Address 19: CAN Gateway (J533)       Labels: None
   Part No SW: 7N0 907 530 AP    HW: 7N0 907 530 AK
   Component: J533  Gateway H57 1653  
   Revision:   H57       Serial number: 190614F1000750
   Coding: 356303
   Shop #: WSC 33361 790 00098
   VCID: 7EF80F78E9B596EEE9B-802B


No fault code found.


-------------------------------------------------------------------------------
Address 22: AWD (J492)       Labels: None
   Part No SW: 0AY 907 554 F    HW: 0AY 907 554 F
   Component: Haldex4Motion H52 7521  
   Serial number: HA1-00014.05.14
   Coding: 0301
   Shop #: WSC 73430 790 00098
   ASAM Dataset: EV_AllWheelContrHA1VW37X 002001
   ROD: EV_AllWheelContrHA1VW37X_AU21.rod
   VCID: 4E989FB81195C66E59B-801B


No fault code found.


-------------------------------------------------------------------------------
Address 25: Immobilizer (J334)       Labels: 5K0-920-xxx-25.clb
   Part No SW: 5K0 953 234     HW: 5K0 953 234 
   Component: IMMO          H02 0905  
   Serial number: 00000000000000
   Coding: 000000
   Shop #: WSC 33361 790 00098
   ASAM Dataset: EV_Immo_UDS_VDD_RM09 A03710
   ROD: EV_Immo_UDS_VDD_RM09_SE36.rod
   VCID: EAD0B3280D3D8A4EA53-80BF


No fault code found.


-------------------------------------------------------------------------------
Address 37: Navigation (J0506)       Labels: 1T0-035-680.clb
   Part No SW: 1T0 035 680 H    HW: 1T0 035 680 H
   Component: RNS-MID       H64 4120  
   Revision: AB001001    Serial number: VWZ6Z7J8313233
   Coding: 040000000400009F0004
   Shop #: WSC 12345 123 12345
   VCID: 336EEE4C92778B86565-8066


   Subsystem 1 - Part No: 3T0 051 859 Q
   Component: EU West V10  8048 


No fault code found.


-------------------------------------------------------------------------------
Address 42: Door Elect, Driver (J386)       Labels: 7N0-959-793.clb
   Part No SW: 7N0 959 793 F    HW: 7N0 959 793 F
   Component: TSG FA        H03 0553  
   Revision:             Serial number: 0000106647040 
   Coding: 011402208001231004
   Shop #: WSC 33361 790 00098
   VCID: 458AA094CCE30536E81-8010


No fault code found.


-------------------------------------------------------------------------------
Address 44: Steering Assist        Labels: 1Kx-909-14x-44.clb
   Part No: 1K0 909 144 R
   Component: EPS_ZFLS Kl. 70     3501  
   Revision: 00H22000    
   Shop #: WSC 33361 790 00098
   VCID: 3972DC64701B71D69C9-806C


No fault code found.


-------------------------------------------------------------------------------
Address 52: Door Elect, Pass. (J387)       Labels: 7N0-959-792.clb
   Part No SW: 7N0 959 792 F    HW: 7N0 959 792 F
   Component: TSG BF        H03 0553  
   Revision:             Serial number: 0000106672842 
   Coding: 011400208001231004
   Shop #: WSC 33361 790 00098
   VCID: 448CBD90C7D93C3EFFF-8011


No fault code found.


-------------------------------------------------------------------------------
Address 56: Radio (J0506)       Labels: 1T0-035-680.clb
   Part No SW: 1T0 035 680 H    HW: 1T0 035 680 H
   Component: RNS-MID       H64 4120  
   Revision: AB001001    Serial number: VWZ6Z7J8313233
   Coding: 040000000400009F0004
   Shop #: WSC 12345 123 12345
   VCID: 336EEE4C92778B86565-8066


   Subsystem 1 - Part No: 3T0 051 859 Q
   Component: EU West V10  8048 


No fault code found.


-------------------------------------------------------------------------------
Address 62: Door, Rear Left (J388)       Labels: 7N0-959-795.clb
   Part No SW: 7N0 959 795 E    HW: 7N0 959 795 E
   Component: TSG HL        H03 0553  
   Revision:             Serial number: 0000107487704 
   Coding: 010000200001531004
   Shop #: WSC 33361 790 00098
   VCID: 4688A798F1E50E2EE1B-8013


No fault code found.


-------------------------------------------------------------------------------
Address 72: Door, Rear Right (J389)       Labels: 7N0-959-795.clb
   Part No SW: 7N0 959 795 E    HW: 7N0 959 795 E
   Component: TSG HR        H03 0553  
   Revision:             Serial number: 0000107485089 
   Coding: 010000200001531004
   Shop #: WSC 33361 790 00098
   VCID: 4688A798F1E50E2EE1B-8013


No fault code found.


-------------------------------------------------------------------------------
Address 77: Telephone (J412)       Labels: 7P6-035-730.clb
   Part No SW: 7P6 035 730 N    HW: 7P6 035 730 N
   Component: TELEFON       H16 4217  
   Revision: 1B001001    Serial number: 00007666367404
   Coding: 0200000000010110
   Shop #: WSC 33361 790 00098
   ASAM Dataset: EV_UHVNA 002720
   ROD: EV_UHVNA.rod
   VCID: 3D7AC874AC334DF6B01-8068


No fault code found.


End   ---------------------------------------------------------------------

Uwe · Mar 29, 2017

Code:

Address 09: Cent. Elect. (J519)       Labels: 1K0-937-08x-09.clb
   Part No SW: 1K0 937 086 AA    HW: 1K0 937 086 AA
   Component: BCM PQ35  M   112 0771  
   Revision: AF112771    
   Coding: 48000ABCA05BF1C0400800C0510001EC4B0000AE724D8160E48140000040
   Shop #: WSC 33361 790 00098
   VCID: 6FE6223CBEDFEF6672D-803A

........

-Uwe-

charly · Mar 29, 2017

Hi Uwe

To be honest I knew it was Zero Zero as when I was looking at the different options the VCDS software it warned me in RED not to mess with it which is why I have left it alone.
Does this mean we cannot code the Rear LED lights or is there anyway to find the correct coding or is it only doable with dealers software.
I really do not understand why VAG have done this and only this area maybe you throw some light on it for me.

Regards
Charly

Uwe · Mar 29, 2017

charly said:
To be honest I knew it was Zero Zero as when I was looking at the different options the VCDS software it warned me in RED not to mess with it which is why I have left it alone.
Does this mean we cannot code the Rear LED lights or is there anyway to find the correct coding or is it only doable with dealers software.
I really do not understand why VAG have done this and only this area maybe you throw some light on it for me.

I'm far from an expert with this Byte 18 nonsense. My understanding: The fact that the existing value is masked does not prevent other values from being tried, it just means we don't know what value to restore if other values that you try don't work out.

Now as to what values you may want to try in this particular car: I will defer to others.

-Uwe-

langers2k · Mar 30, 2017

You need to backup the existing light config before changing byte 18 which is not something VCDS can do.

Where are you in the UK? I might be able to help if you're close enough having done something similar to my PQ35 based Octavia.

If you can, it's also worth trying to find an autoscan of a Yeti with factory LED lights to see if byte 18 is still 00.

TBAx · Mar 30, 2017

I already performed this retrofit with direct editing of the BCMs light config (which is masked behind thr 0x00 in Byte 18).

So if you are near Germany this would take us roughly 10 minutes. You might however find an experienced VCP user to help you.

As for Byte 18 changing it to anything different than 0x00 will mean you can not go back. You must then find either the correct value or the original one. Since there are 255 possibilities that is way to go. For increased fun, I've read stories where people where able to even brick the BCM using the bruteforce method. :/

Dana · Apr 3, 2017

I agree with both of those replies. VCDS can't read or change the EEPROM and that's where you will find the original configuration so it can be backed up.

We may be able to do that one day but it isn't going to happen anytime real soon with VCDS. If that function is implemented we need to make sure it won't brick modules (which can happen with normal coding at times).

charly · Apr 7, 2017

Hi
Thanks for all the input to the problem everyone, I now realize there are 3 ways to go which are

Number 1, risk bricking the BCM and play with byte 18,

Number 2, go from where I live in UK to Germany which is tooo far.

Number 3, final option is to use load/ballast resistors which is easier than what I originally thought as it turns out the 2 tail light bulbs are 5w wedge type bulbs and not 21w bulbs so the load would only have to total 10w and not 42w per cluster.

I have already tried number 3 with 25w 25ohm ballast for the tail light which work 100% but the brake lights both flash 5 times rapid every time the lights are turned on and then work normally.
I have used 50w 8ohm for a 21w load on the brake lights and it seems after a bit of research this flashing is due to cold start diagnostics from the BCM to test the load and make sure bulbs are correctly working.
I am not sure how to stop this happening with ballast resistors or capacitors fitted or even if its possible to stop this cold start check, but there is a warning elsewhere that this can cause premature wear on the LEDs causing shorter life, I fail to see how this can happen if its just a 12v feed that the BCM is sending to the brakelights to test unless it is ramping up the volts somehow.
My only other option is to try to find someone in the UK who can code these properly like TBAx in Germany can do, I am not worried to change byte 18 as long as I know its not going to cost a new BCM or end up not being able to return to a working correct hex value for the car.

langers2k · Apr 8, 2017

Don't mess with byte 18 without a backup!

I'm in the UK with the right kit to backup and edit the light config - it just depends where you are. Even if you're not close I might be able to suggest some that is.

As I said in post #7, where in the UK are you

Enriquez · Apr 9, 2017

Option 4 is use the tool can read/writ eeprom (VAS 5054a, VCP etc) and use VAG Helper.

charly · Apr 10, 2017

Looks like im going to have to invest in VCP as it seems it can get into all the cracks that VCDS cannot.

I will private message you Langers2k now

Sorry I didnt answer anyone earlier but I only just noticed page 2 lol

LED tail lights coding

charly

Verified VCDS User

Dana

Administrator

charly

Verified VCDS User

Uwe

Benevolent Dictator

charly

Verified VCDS User

Uwe

Benevolent Dictator

langers2k

Verified VCDS User

TBAx

Verified VCDS User

Dana

Administrator

charly

Verified VCDS User

langers2k

Verified VCDS User

Enriquez

Verified VCDS User

charly

Verified VCDS User