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Thread: Transporter T5 GP retrofit BCM from T6 ==> instrument lighting is fading in and out

  1. #1
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    Transporter T5 GP retrofit BCM from T6 ==> instrument lighting is fading in and out

    Hallo @ all, i retrofitet the BCM from a T6 into a T5 GP.

    I changed
    - 7H0 937 090 B BCM PQ25 Max4 H74 0712
    to
    - 7E0 937 090 C BCM PQ25 Max4 H82 0752

    Everything is working whell, but the "instrument lighting" is fading in and out when enabled, the Time for the fading can be adjusted by the Light-Intensity-Switch.

    Here is the info from the BCM:

    Code:
    Address 09: Cent. Elect. (J519)       Labels:. 7E0-937-BCM-V1.clb
       Part No SW: 7E0 937 090 C    HW: 7E0 937 090 C
       Component: BCM PQ25 Max4 H82 0752  
       Revision: B9082001    Serial number: 4000 088181300
       Coding: E0A0393A0A21201301280E716EAB8FD50694662F60857851320000020040
       Shop #: WSC 12345 123 12345
       VCID: 2B02F23693056C2F4F5-807E
    
       Subsystem 1 - Part No: 1K0 955 559 AH  Labels: 1K0-955-559-AG.CLB
       Component: RLS 071013 05  54  0403 
       Coding: 02252E
    
       Subsystem 2 - Part No SW: 7E0 959 801 J    HW: 7E0 959 801 J  Labels: 7E0-959-80X-V2.CLB
       Component: J386__TSG_FT  003 8652 
       Serial number: KU0KU008101300018609
       Coding: 0400A1
    
       Subsystem 3 - Part No SW: 7E0 959 802 J    HW: 7E0 959 802 J  Labels: 7E0-959-80X-V2.CLB
       Component: J387__TSG_BT  003 8652 
       Serial number: KU0KU002101300011203
       Coding: 1400A1
    
       Subsystem 4 - Part No SW: 7E0 959 442 A    HW: 7E0 959 442 A  Labels: 3C8-959-537.CLB
       Component: E221__MFL-DC1  H02 0103 
       Serial number: 29150002355190075477
       Coding: B4FFFF
    
    No fault code found.
    Does someone have and Idea ?

    Greetings

    Dennis

  2. #2
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    Found the Issue.
    It looks like the T6 BCM 7E0 937 090 C is not capable of suplying the needed current for the Instrument lighting.
    Thats the source of the lighting fading in and out ....

    With T5 BCM 7H0 937 090 B the Klemme 58_out from T73b Pin 1 or later T73b Pin 4 had enoth current.
    In T6 an aditional Relay J602 is needed, which is controlled by T73 pin 7

  3. #3
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    Hi Dennis,
    May I ask you for the reason of the t6 BCM retrofit?
    What would you like to achive?
    I have a Caravelle T5.1 and resally interested every upgrades tweeks and trick.

    If yuou do not mind would you tell me a bit more?

  4. #4
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    The T6 BCM is needed for ACC Retrofit.
    But the BCM is the easy Part of it.
    ABS, Steering Wheel, Airbag ECU need to be changed, too.
    And Component Protection and SWAP need to be solved, too.

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  6. #5
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    Quote Originally Posted by dnoermann View Post
    The T6 BCM is needed for ACC Retrofit.
    But the BCM is the easy Part of it.
    ABS, Steering Wheel, Airbag ECU need to be changed, too.
    And Component Protection and SWAP need to be solved, too.
    Thank you Sir, so I do not need to worry about it. I am lucky I have ACC

  7. #6
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    Quote Originally Posted by Limalex View Post
    I have a Caravelle T5.1 and resally interested every upgrades tweeks and trick.
    Quote Originally Posted by Limalex View Post
    Thank you Sir, so I do not need to worry about it. I am lucky I have ACC
    Hm, that is impossible

    May i ask which exact Year/Month is your Car ?

    Bacause ACC was only available @ the T6, which started in Mid 2015.

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  9. #7
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    Quote Originally Posted by dnoermann View Post
    Hm, that is impossible
    Well You might right. Lets clarify

    Is not the ACC the cruise control?

    My one 2012/November Caravelle Executive

  10. #8
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    Quote Originally Posted by Limalex View Post
    Well You might right. Lets clarify

    Is not the ACC the cruise control?

    My one 2012/November Caravelle Executive
    Ok you deffenetly right myone not adaptive

    watching this thread with interrest.

    But I need to surt ouit my MFSW first

    Are you planning to do a How to guide?
    Last edited by Limalex; 11-29-2019 at 02:23 PM.

  11. #9
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    Quote Originally Posted by Limalex View Post
    Ok you deffenetly right myone not adaptive

    Lets see i have to work some other things out before i do a howto ...

  12. #10
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    Quote Originally Posted by dnoermann View Post

    Lets see i have to work some other things out before i do a howto ...
    Happy to wait

    So basically if you succeed you will Be able to use t6 steering wheel with a cruise control?

    Which BCM you trying to fit ? Is it the latest Euro 6?

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