Re: Diagnostic not working on M3 E36
Thank you for your reply.
I will follow your instructions and clean the pins/holes.
After searching on the web I found also this explanation from a BMW expert:
sometimes some module pulls down diagnosis bus and you cannot diagnose your car at all.
to find out which module it is you have to disconnect all modules one by one and try to diagnose your car. when diagnosis bus starts to work you have found your problem.
central locking module
automatic gearbox module
and so on
i do many diagnostics on engines ( 20-40 cars in week) and sometimes have this trouble. when i am in a hurry i just disconnect white yellow and white purple wires from connector that connects engine wiring harness to car main harness and i can work with ecu.in older cars its 1 car from 20 that has this problem.
disconnecting these wires will not help you to diagnose your airbag problem so you have to go through this module disconnecting procedure.
other way is to cut these wires just after diagnostic connector, cut them next to airbag module and connect diagnostic connector wires directly to airbag diagnostic module wires.