VW T5 CCS retrofit interior light BCM upgrade issue

   #1  

amigokola

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Hi to all retrofit Maniacs ;)
Lately I retrofitted CCS in VW T5. All was ok but interior lights didnt work.
I found out that I need to add to BCM extra feed which I did ( T73a/63 T73b/68 from SA9)
Now interior light is working properly but as soon as I turn on lights or reverse gear foult pops out..
Old BCM 7H0937086F
Any suggestions ?? Someone had this problem before ??
Code:
VIN: WV3ZZZ7JZBX012654   License Plate: SG 12345
Mileage: 301800km-187529mi   Repair Order: T5 BCM Upgrade



--------------------------------------------------------------------------------
--------------------------------------------------------------------------------


Chassis Type: 7J-VN75 (6N0)
Scan: 01 03 04 08 09 15 17 19 25 56 69 0B

VIN: WV3ZZZ7JZBX012654   Mileage: 301800km-187529miles

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: Malfunction 0010
15-Airbags -- Status: OK 0000
17-Instruments -- Status: OK 0000
19-CAN Gateway -- Status: OK 0000
25-Immobilizer -- Status: OK 0000
56-Radio -- Status: OK 0000
69-Trailer -- Status: OK 0000
-------------------------------------------------------------------------------
Address 01: Engine (J623-CAAC)       Labels:. 03L-906-022-CAA.clb
   Part No SW: 03L 906 022 CH    HW: 03L 907 309 K
   Component: R4 2,0L EDC   H42 9970  
   Revision: 26H42---    Serial number: 00000000000000
   Coding: 01194012233400080000
   Shop #: WSC 12345 123 34567
   ASAM Dataset: EV_ECM20TDI01103L906022CH 002013
   ROD: EV_ECM20TDI01103L906019AM_002.rod
   VCID: 6D92D365BC77E4EED9-8038

No fault code found.
Readiness: 0 0 0 0 1 

-------------------------------------------------------------------------------
Address 03: ABS Brakes (-----)       Labels: 7E0-907-37x-MK25AXT.clb
   Part No SW: 7E0 907 379 G    HW: 7E0 907 379 E
   Component: ESP MK25A XT  H43 0105  
   Revision: 00H43001    
   Coding: 408724AF89A5029724A891766B6210
   Shop #: WSC 35110 377 49152
   VCID: 36203C0981A16736E8-8062

No fault code found.

-------------------------------------------------------------------------------
Address 08: Auto HVAC (J301)       Labels:| 7E5-907-047.clb
   Part No SW: 7E5 907 047 AL    HW: 7E5 907 047 AL
   Component: Climatic-T5   H11 0203  
   Revision: 00005001    
   Coding: 0000000002
   Shop #: WSC 35110 790 50316
   ASAM Dataset: EV_ClimaticT5 A01003
   ROD: EV_ClimaT5Basis.rod
   VCID: 79BAF735F83F484E45-802C

No fault code found.

-------------------------------------------------------------------------------
Address 09: Cent. Elect. (J519)       Labels:. 7H0-937-08x-09.clb
   Part No SW: 7H0 937 089 D    HW: 7H0 937 089 
   Component: BCM T5GP Li4  H47 0230  
   Revision: BS047001    Serial number: 0398 144110130
   Coding: A00012800E210000000008103C0B8C140080410F60040000300000000000
   Shop #: WSC 00999 123 04321
   VCID: 373E310D86AB9E3EF3-8062

2 Faults Found:
03304 - Response Closing Status of Rear Right Door 
            008 - Implausible Signal
             Freeze Frame:
                    Fault Status: 01101000
                    Fault Priority: 2
                    Fault Frequency: 1
                    Reset counter: 92
                    Mileage: 301807 km
                    Time Indication: 0
                    Date: 2015.02.08
                    Time: 15:16:23

00978 - Lamp for Low Beam; Left (M29) 
            010 - Open or Short to Plus
             Freeze Frame:
                    Fault Status: 01101010
                    Fault Priority: 3
                    Fault Frequency: 1
                    Reset counter: 92
                    Mileage: 301807 km
                    Time Indication: 0
                    Date: 2015.02.08
                    Time: 15:19:01


-------------------------------------------------------------------------------
Address 15: Airbags (J234)       Labels:| 5K0-959-655.clb
   Part No SW: 7E0 959 655 B    HW: 7E0 959 655 B
   Component: VW10Airbag003 H06 0013  
   Revision: --------    Serial number: 003HL004WWVB
   Coding: 000000000000000000000000000000003033
   Shop #: WSC 35110 790 50316
   ASAM Dataset: EV_AirbaVW10BPAVN750 A01026
   ROD: EV_AirbaVW10BPAVN750.rod
   VCID: 35223B0594A76C2EE1-8060

No fault code found.

-------------------------------------------------------------------------------
Address 17: Instruments (J285)       Labels:| 5K0-920-xxx-17.clb-SRI1
   Part No SW: 7E0 920 860 C    HW: 7E0 920 860 C
   Component: KOMBI         H04 0204  
   Serial number: 00000000000000
   Coding: 160A00
   Shop #: WSC 12345 123 34567
   ASAM Dataset: EV_Kombi_UDS_VDD_RM09 A04086
   ROD: EV_Kombi_UDS_VDD_RM09_004_VW32.rod
   VCID: 281CE271531501C66A-807C

No fault code found.

-------------------------------------------------------------------------------
Address 19: CAN Gateway (J533)       Labels:. 6N0-909-901-6R.clb
   Part No SW: 6N0 909 901     HW: 7H0 937 089 
   Component: GW-K-CAN TP20 0230  
   Coding: 042200
   Shop #: WSC 00999 123 04321
   VCID: 70ACCA11A3450906F2-8024

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          H04 0204  
   Serial number:               
   Coding: 000000
   Shop #: WSC 00000 000 00000
   ASAM Dataset: EV_Immo_UDS_VDD_RM09 A03008
   ROD: EV_Immo_UDS_VDD_RM09_VW31.rod
   VCID: 6A98D8798D99F3D6BC-803E

No fault code found.

-------------------------------------------------------------------------------
Address 56: Radio (J503)       Labels:. 5M0-035-1xx-56.clb
   Part No SW: 7E0 035 156 A    HW: 7E0 035 156 A
   Component: Radio         H30 0072  
   Revision: R0000000    Serial number: VWZAZ1L0752496
   Coding: 0000020001
   Shop #: WSC 35110 377 08192
   VCID: 210AFF55382FF08E2D-8074

No fault code found.

-------------------------------------------------------------------------------
Address 69: Trailer (J345)       Labels:. 1K0-907-383-V2.clb
   Part No SW: 1K0 907 383 F    HW: 1K0 907 383 F
   Component: Anhaenger     H09 0100  
   Revision: 3A001001    Serial number: 00000144348400
   Coding: 410D000100000000
   Shop #: WSC 35110 377 08192
   VCID: 302C0A1163C54906B2-8064

No fault code found.
 
   #2  

iichel

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IIRC the reverse light needs to go via BCM as well. Just like i.e. low beam. You did a BCM low to BCM Max conversion, that is not a plug and play swap to a 089 BCM.
For that, an 087 BCM would have been better.
 
   #3  

amigokola

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Yes I know but there was no used 087 only 089 available.
Why it throws only M29 foult and no other bulbs ??
I sit on wiring diagrams for a while now but there are a lot of versions depending on year in T5...
For me it is unclear why after adding this two extra power feed cables BCM react on light switch like this ??
 
   #4  

iichel

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Reverse light in 086:
Code:
Gearbox  ______ BCM
            \ 
              Reverse light
Reverse light in 089 BCM:
Code:
Gearbox -------- BCM ------ Reverse light
With this high-level illustration, the difference between 086 and 089 BCM is hopefully clear.
Now you have an 089 BCM with 086 wiring. All works as per the 086 scheme, but the BCM is receiving only the input. It wants to output a signal to power the reverse light but finds nothing (like a blown light).
Hence the warning light. Same will probably happen with the license plate lights and low beams. At least, in principle. The low beams are a bit more complicated.
 
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   #5  

amigokola

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Ok but why BCM throws only M29 foult and not reverse bulb and M30 from right side dipped beam ??
 
   #6  

iichel

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Since your 089 BCM is probably still coded with the coding of your 086 BCM but is parameterized to work with the wiring as per the 089 diagram. So it's confused, to say the least.
 
   #7  

amigokola

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Ok. I'll try it tomorrow. Thx.
 
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   #8  

iichel

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Yes. My recommendation is to find yourself the wiring diagrams for the T5.2 or T6.
Find the wiring that you now have in basic equipment and look at the wiring in the basic equipment for 7L6 (start/stop). Wire your car as it were a car with start/stop for the low beam, fog light, DRL, reverse light and license plate lights.
Then we'll have a look at the coding.
Alternatively, find a 087 BCM and it will be plug and play.
 
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