BMW M52 engine. (HALL-HALL)
Black mot88 connector lock is slightly different from the natural color M50 (either type can be used with a bit of filing).
The mot88 pinout of M52 is VERY different. So only plug in ECU explicitely made for M52. Do NOT plug in ECU made for any other type (M50 or S50 or other).
See [M50-vanos-vs-s50b32.xls] columns.
See
MembersPage/BmwMFiftyTwoTriggers - HALL-HALL trigger (and trigger supply) related
MembersPage/BmwMFiftyTwoMainRelay Prelling - solved by adding diode: anode=ec36/25 >| cathode=mot88/54 = mot88/65