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Summary of change:
'''BMW M44B19 engine 1997''' Motronic 88 pin harness in BMW E36 318is * VR / HALL * 4 IGBT seems enough * stepper chip might not be needed '''Primary trigger''' VR, but polarity is not confirmed. Best guess (without measurement, so not confirmed) * '''black mot88/20=EC36/27''' * '''yellow mot88/78=GND''' ** '''ANY INFORMATION IS WELCOME. IF YOU HAVE ACCESS TO BMW M44 harness, please check colors (is the above correct ?)''' ** If you have engine, or installed before, any scopeshot or notes would be welcome. Thanks. ** Pin 78 is the positive signal - Gunni ---- The '''Mechanical keying of the M44 harness mot88 connector''' would be nice to see also (although easy to cut out if necessary). Any info or pic welcome. Thanx. ---- '''IDLE actuator / ISC valve''' * M44/pin2 and M44/pin29 (open/close) direction matches M52 ? ** apparently '''M44/pin2 should be inj-H''' (like M52/pin27 if the BMW ISC valve drawings on '''p104 and p132''' are consistent; ) ** '''inj-G and inj-H with low Voltage flyback''' (like with M52) * resistance (ohm) ? ---- '''Valves''' * '''M44/pin58 Changeover valve''' resistance ? * '''M44/pin61 EVAP valve''' resistance ? ---- '''Relays (usually 92 .. 120 Ohm ?)''' * '''M44/pin27 DME relay''' (resistance ?) ** flyback diode removed or changed to 18V bidir for p259/1 (EC36/1) controlling DME relay * '''M44/pin63 Fuel pump relay''' (resistance ?) * '''M44/pin57 Aux fan relay''' (resistance ?) ---- '''AC ON input''' * M44/pin69 need pullup or does not matter ? ** There looks to be an internal pull down in the OEM ECU so no a pullup is not needed. ---- See [http://vems.hu/download/v3/Motronic88/ M50-vanos-vs-s50b32-vs-M60B40_B30.xls] M44 column (and other 2020-07-xx files)
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