I have installed an S2000 engine in a '72 BMW 2002. I am trying to trim the original wiring harness. I have the wiring schematic for the S2000 but I cannot locate a connection. The connection is for plug E3 on the ecm. This GRN/WHtT wire goes to
3 places: 1- connector 4 on the immobilizer unit
2- connector 5 on data link connector
3- some sensor which shows it as a doted cylinder in the schismatic which has something to do with the O2 sensor.
Can anybody tell me where I connect the 3rd connection having something to do with the O2 sensor?