Enable Trailer Assist on MQB cars

   #1  

hadez16

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Hi all,

the following script is a one-clicker to enable the Trailer Assist on MQB cars just by coding.
This was already successful coded on a VW Passat B8, VW Tiguan AD or Golf MK7.5

Requirements are of course a trailer hitch, a Trailer Assist capable rear view camera and of course a PLA 3.0 parking assist PDC unit.

If you own AreaView, your rear view camera is capable of it.

Code:
StartVCDS()
CheckForUnits("6C,69",1) ;RVC and trailer as a requirement otherwise error
OpenUnit("6C")
	TestComponent("Areaview",1) ; it is most likely that one already has the AreaView RVC
	ChangeCoding("10:3","")
CloseUnit()
OpenUnit("10")
	TestComponent("PLA 3.0",1) ; PLA required
	LoginToUnit("71679")
	ChangeCoding("0:3","")
CloseUnit()
OpenUnit("5F")
	ChangeAdpChannel("menu_display_trailer_assistant","not activated")
	ChangeAdpChannel("menu_display_trailer_assistant_over_threshold_high","not activated")
	ChangeAdpChannel("Trailer_Assistant_0x36","not activated")
	ChangeAdpChannel("Trailer_Assistant_msg_bus_0x36","Comfort data bus")
CloseUnit()
OpenUnit("17")
	ChangeCoding("12:5","")
CloseUnit()

ClearAllDTCs()

Cheers,
hadez16
 
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   #2  

hadez16

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The script had flaws. I edited my first post.

Is "Comfort data bus" the right expression in the english VCDS version? At least that is what I found...

And yes, the trailer_assistant channels should be deactivated except for the databus channel, otherweise there can be problems with the RVC.
Feedback would be appreciated ;)
 
   #3  

downtime

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Sorry, old thread but maybe the script should be update. Also ABS has trailer assist related bit. Byte 24 bit 7 ARA trailer assist.
 
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hadez16

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Sorry, old thread but maybe the script should be update. Also ABS has trailer assist related bit. Byte 24 bit 7 ARA trailer assist.

Hey,

I did activate Trailer Assist already on many MQB cars but never changed the ABS coding.
Do you know in what situation this bit has any effect?
 
   #5  

downtime

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Good question. Maybe there’s some auto braking feature as well?

Have you compared ABS coding from a car which has trailer assist from factory?
 
   #6  

DV52

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Sorry, old thread but maybe the script should be update. Also ABS has trailer assist related bit. Byte 24 bit 7 ARA trailer assist.

And, the ABS module also has IDE04774-Vehicle and trailer stabilization. Not sure what this does but my MQB platform A3 had factory fitted trailer function and this channel was factory set to not active
 
   #7  

downtime

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I had that as well set to not active and I have a factory tow bar. Trailer stabilization function I think is ESP feature that will help stabilize the car + trailer combo if it starts to get out of control on slippery conditions. I set it to active on my car and have not seen any ill effects at least.
 
   #8  

brundozg

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Hi, resurrecting the topic after 2 years. Got interested about it as I will be dragging a trailer pretty often in next few months.
Few questions:
-how to know if car has "Trailer Assist capable rear view camera"? Answer to my own question; J928 Part No SW: 5Q0 907 556 D HW: 5Q0 907 556 are ok, J772 is not suitable
-Is it worth activating IDE04774-Vehicle and trailer stabilization on car with trailer hitch and J345 trailer module, but without trailer assist?
-did anyone find out when Byte 24 bit 7 ARA trailer assist should be coded?
 
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   #9  

AINils

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@downtime is correct in ZDC for MK100 ABS Byte 24 > Bit 7 is named ARA, so it is related to it. But same like @hadez16, never code it till now, and it works in every case
 
   #10  

simonbennetts

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Hi - I'm relatively new with VCDS but have successfully coded bits and bobs before on my T5 and T6 and am moderately IT literate - I'm trying to enable trailer assist on my 2018 Tiguan R-Line. From what I can see, I have all the necessary components (swivelling towbar, park assist PLA 3.0 & RVC Compact H12 0231 backup cam). I can code the instrument unit (12:5) and the park assist module (0:3) but when I try to save the coding for the camera (10:3), I get an Error 31: Request out of range when hitting "Do It!". Does this suggest the camera is not capable? It has the lines that move with the steering etc and I thought would be OK?

Camera Image

Also, the Park Assist throws an error when done but I'm guessing I just need to ignore that and clear and it will then be OK?

Thanks
Simon
 
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Robert-VW

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You need a Compact + camera.

See below.
Screenshot-20221203-140149-Photos.jpg


The one on the right in the photo above has NO TRAILER ASSIST support.
The one on the left supports TRAILER ASSIST.
 
   #13  

simonbennetts

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Many thanks for the replies. Is the replacement plug and play or does it require coding? Also, where do I get one?
 
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simonbennetts

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I don't have 360 area view but have the full park assist and most other components (I think - except the compatible camera)...
 
   #16  

downtime

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What about the 360 area view system?
That has suitable camera for trailer assist. So yes, only coding.

Many thanks for the replies. Is the replacement plug and play or does it require coding? Also, where do I get one?
Yes, camera needs car specific dataset and coding and calibration. Try ebay, official parts shop, allegro, add breaker here :)
 
   #17  

simonbennetts

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That has suitable camera for trailer assist. So yes, only coding.


Yes, camera needs car specific dataset and coding and calibration. Try ebay, official parts shop, allegro, add breaker here :)
Thank you! Still looking for one!
 
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