Perhaps you could help me out. I installed VEMS onto S6 4.2 and converted the dual dizzy ignition system to 1.8T (AEB) passive coils.
The car works like a charm but I couldn't find tachometer output pin number in the factory manual I have.
Can someone help me out? Jörgen maybe?
You have to configure the tacho to have a particular output in MT. This then corresponds to a physical output pin that could be looked up in the pinout diagram. I think I'm using misc output number 4 for my tacho.
Heh, I'm aware of that ;D I'm using P259 channel 4 right now with 1k pullup for the tach signal.
It's just I don't know the tach pin number on the original Motronic ECU, i used mostly original wiring. I need to get the dash tach working also..
OK. I should really read the title of the thread ;)
With a bit of luck, I'm starting a VEMS on a Motronic equipped car next week. Maybe the manual for it will help you?
I have the factory schematics for it, but there's no info about tach signal from the ECU.
But, I found that pin, it's no 40 (yellow wire) thanks to a friend and 3 hours of work ;D
I know the tach output on a 1987 BMW with motronic ECU is pin-6, or maybe it was pin-7. Not sure if this helps much.