Retrofit ACC VW T6

   #21  

Robert-VW

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Isn't this error about cruise buttons?

Code:
0786 - Databus
          U1122 00 [009] - Implausible Message
          [FAULT_CHK_mGRA_Neu]
          Confirmed - Tested Since Memory Clear

Coding perhaps incorrect? In gateway? Steering wheel module?
Thanks everyone for help.
Problem has been resolved.
Faulty LHS MFSW buttons 7E0 959 442 A (new set on order).
ACC retrofit completed successfully :thumbs:
 
   #22  

ED30R

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7E0 959 442 A
Hey.

You say the buttons didn’t work, did they output test ok when you looked at measuring blocks? I’ve a t6 with similar fault codes (not to hand) but the output test on buttons work in measuring blocks.
 
   #23  

Robert-VW

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I have checked LHS buttons functionality in advanced measuring blocks.
Normally four buttons respond accordingly (RES, SET, 0/1, CNL).

Actually I have tried 3 sets of buttons all together.
First 2 were second hand and 3rd one brand new.
Both second hand produced same fault code and ACC wouldn't work.
Third one fixed the problem instantly.

As far as I remember, one of the buttons( not sure now which one: RES, SET, 0/1, CNL) didn't respond in VCDS and instead (ACC distance button) responded.
 
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