As I ordered my Amarok with a Trailer hitch installed, the dealership had to do it before I took delivery… There is a trailer control module that is part of the “electrical installation kit” (part# 2h5 055 203 B) that has to be fitted when you install a trailer hitch. Naturally it does not matter whether you use the gooseneck or any other mechanical type of hitch, but the electrical kit is what is needed for correct function (trailer sway control etc. – I can also confirm that my rear fog light is working as it should). Here is my hitch:
The trailer hitch module, as a retrofit showed no WSC and hence was not coded at the dealership. So I checked with VCDS (www.ross-tech.com) on how to do it and which modules needed additional coding too.
Here are the coding instructions for the Amarok (2H) from the Ross-Tech wiki: http://wiki.ross-tech.com/wiki/index.php/Trailer_Hitch_Retrofitting_(2H)
First we have to make sure that the CAN Gateway (#19) knows there is a Trailer module (done by editing the Installation List on the CAN Gateway:
Next we code the Trailer control module (#69), using the Long Coding Helper:
Original coding was: 01 00 00 01 00 00 00 00 (Don’t see anything that needs to be coded here)
Next we need to tell the Engine control module (#01) that there is a Trailer module:
- original coding was: 01 2A 00 12 23 26 00 08 00 01
- and had to be changed to: 01 2A 00 12 23 36 00 08 00 01
If you have a Park Assist (#10) installed, it needs to know about the Trailer module as well:
- original coding was: 10 81 03 showing “Trailer Hitch not installed”
- and had to be changed to: 11 81 03
Along with all the manuals, there was this one – the fitting instructions for the Trailer Hitch Electrical installation kit.