MembersPage/BmwMFiftyTwo (2018-09-11 06:20:58)

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.


Easy to apply, but NOT Plug and play

Also, take care when plugging the AMP type connectors. (some have keys, like crank-HALL and cam-HALL sensor connectors). Plugging to the wrong branch will cause problem.


Idle output(s)

Please measure resistance between +12V supply (middle pin) and the idle solenoid driven by


Fuel consumption output

1998_BMW_318is-c_323i-c_328i-c_M3-c_ElectricalTroubleshootingManual_M52.pdf

Non essential to ecu operation, just to get the consumption gauge showing something
  • p259 200mA would be enough for it, only has weak pullup.

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