38 pin connection

I have E240 year model 1998.
I can connect engine control unit via 38 pin connector (pin #4) under the hood. ECU responds nice.
But there seems to be something odd when I try to connect transmission computer by pin #10. There seems to be no responce at all.
Device is ELM327 based and I suppose the protocol should be ISO 9141-2.
What am I doing wrong? Is the transmission connection supposed to be made with K- or L-line? At least engine responds K-line fine but how about the transmission?
What I'm lookin for is clearing transmission adaptation. I do not know what commands to use for this yet, but maybe the connection should work first.
Reg: Harri
Add pictures here
<% if( /^image/.test(type) ){ %>
<% } %>
Add image file

Motorsforum.com is a website by car enthusiasts for car enthusiasts. It is not affiliated with any of the car or spare part manufacturers or car dealers discussed here. All logos and trade names are the property of their respective owners.