BMW 635i ECU repair

[kareszka]

Hi !
I need help , I will repair one Bosch Motronic ECU . Car is old BMW 635i , my 1986 ,
Wath is this ic in red circle .
https://drive.google.com/file/d/1OEBt9PI0x4gd1APVKXbJXtHBOg2dn-Ok/view?usp=drivesdk
( This is better Picture )
Thanks

[socha1997]

723038

You should check pinout with a voltage meter. Upper you have a schematic.
I think it is an Analog Voltage Comparator.

[kareszka]

Thanks , pin 12 gnd 100% , maybe LM2901n quad comparator