Golf Mk5 Tow Bars - Q&A - All you need to know Guide!! Advice, Tips...

[Flash2]

What you do is remove the CAN H & CAN L wires from positions 7 & 8 of connector G.
The two removed wires should be inserted into connector 14 which is then plugged into male connector 15.
The two free CAN wires in the towbar loom are then inserted into positions 7 & 8 of connector G.

I hope that helps.

Jim.

[frisko76]

Ok..thanks..but the pin 7 e 8 from connector G not is my problem..the really question or problem is the connector 15..i not understand this two wire (can h and can l)where are connected this wire!! Do you understand?orange brown and orange green from ecu to pin 7 e 8 of connector G ok?pin 7 e 8 of connector G original wire at the orange/green and orange brown ..but this wire return in the ecu??excuse but i have need to understand because i am rebuilding the wiring of the ecu..

i have not understand Where it ends two wire, can h and can l, from pin 8 and pin 7 ?is a closed circuit?or return to 13 pin?it is very important for a reconstruct the wire..thanks
Screenshot - 02_05_2017 , 21_18.jpg

[Flash2]

Do you understand?

No, I don't see what is causing your confusion.

Maybe the diagram below will help. The two sets of CAN wires in the towbar loom are linked at the towbar module connector. The CAN signals go down the two CAN wires that are inserted into connector G (RED ARROWS) and come back up the other two CAN wires that are connected via 14/15 to the car wiring loom (BLUE ARROWS).



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[frisko76]

No, I don't see what is causing your confusion.

Maybe the diagram below will help. The two sets of CAN wires in the towbar loom are linked at the towbar module connector. The CAN signals go down the two CAN wires that are inserted into connector G (RED ARROWS) and come back up the other two CAN wires that are connected via 14/15 to the car wiring loom (BLUE ARROWS).



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I not have original cable..i have only towbar with 13 pin and 8 cut wires at connector black..i not have cable for connector red..i must be reconstruct original cable but the wire for connector red is 8 pin..red purple,red yellow,red blue..ground..purple black..and red black and orange brown an green for can..i not have connector 14/15 and i want to try understand where to finish this wire of can return connector G!!i am confused

I have in the connector red only two wires can and no 4 wires..i want understand where is they become four!Screenshot_2017-05-02-23-25-19.jpg

[Flash2]

OK, I think I understand your problem now. The 2 become 4 inside the loom. The 2 orange/brown wires are spliced together and the 2 orange/green wires are spliced together.

You don't really need the 4 wires though. All you need to do is splice the two CAN wires coming from the red connector on the towbar ECU into the original CAN wires on connector G.

If your making your own cable though be aware that CAN wires are a twisted pair...see below. Using straight wires over any significant length on a CAN network can corrupt the data being passed between control units, causing a huge headache for the person who is trying to diagnose all the faults the corruption might cause.



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[frisko76]

Ok..thanks to you reply..i have understand the wire are sample intersection with original can car..this scheme is the same of you write last me?
Screenshot_2017-05-03-13-50-53.jpg

[Flash2]

Yes, the diagram shows the 2 CAN wires from the towbar ECU spliced onto the original CAN wires at connector G. That's all you need to do.

[frisko76]

Ok..thanks ..you are a very gentle man..thanks ..bye

[Flash2]

Glad I was able to help.

Good luck with the installation.

Jim.

[frisko76]

Hi dear..i have another problem..can bus is ok and i have check trailer option on vcds...but with pin2 of ecu control unit(+15volt) there is more problem..i have this diagram and in the position 8 on fuse panel c i have only pin(+15)and that's all right..on pin down i have put the wire pin 2 of ecu control (+15) with fuse 5ampere..but on rear 13 pin, in the 9 hole position, i have always 13volt costant also key off and car closed!!there is an a problem!!