The BigMotronicPnP? is on hold for a while until I have time again.

In the mean time Ill be supplying VEMS PDF wiring info.

88pin motronic wiring information

Here is crank and cam captures for BMW M52 engine single vanos.

Can this cam sensor be made to work?

The ignition signal is number 1 cylinder.




Frequency changes during the toothed section and then go back to lower frequency when the tooth has passed

Currently the supported method (also see MembersPage/JasonVoytilla/BMW/Sensors

) : '''HALL replacement sensor: BMW 12 14 1 438 081 - Hall Effect Falling Edge. Pinout (from 1993 BMW .. .pdf document page#106 (m50 vanos)

Note: m52 page#98 has camshaft sensor middle (pin#2) going to mot88/pin64

That matches Gunnar's xls for camshaft (just forgot to mention HALL). So

M52 PnP? main relay buzzing issues

Seen on two ECUs now.

ECU Serial numbers are 17304 and 14951.

Im going to have my customers send them back for fixing.

Easiest solution would be that VEMS buys as 323i or 328i and plugs in and tests it? A car like that should be easy to come by in Hungary for little to now money?

This has not happened on the other M52 PnP? ECUs Ive bought before.

In November we tested 2 M52 PnP? ECUs (random), supplying +12V through the main relay in all possible combinations (ECU powered up, not powered up, ...), and could not reproduce the buzzing.

Can you measure an misbehaving ECU with DVM diode mode; Between main relay output pin (red probe) and testing other outputs (black probe)

side experience, it happens if main relay which provide 12v feed for injectors and flyback pin is driven from p259 channel. valdas.