Motronic 1.0 pinouts

[zhoag2]

We're trying to wire up a microsquirt 3 to a 1987 325E. Looking at the pinouts, it seems to be missing the tachometer (21) wire and a few others.

ECU is a Motronic 1.0 (0 261 200 027)


Pinout chart we're following:

[Panici]

However, on older vehicles (earlier than 1987) the simpler engine management system provided tachometer and fuel rate data through a separate plug, not the main loom.

http://www.e30zone.net/e30zonewiki/index.php/Instruments#Tachometer

AND

Motronic 1.0 has an additional idle air bypass screw on the throttle body

http://www.e30zone.net/e30zonewiki/index.php/Motronic_1.0#Idle_Control_Valve_.28ICV.29

The info contained herein applies to models w/ Motronic units prior to 1.1 (which eliminates the ICM and controls the ICV directly).

http://www.verrill.com/car/e30_idlefaq.shtml

Perhaps this is why you don't have ICV pins? Do you have a seperate Idle Control Module (ICM)?
I'm not personally familiar with Motronic 1.0.