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Summary of change:
'''Trigger related''' subpage of MembersPage/MarcellGal/PowerAndTraction There is still some uncertainty about which sensor position is which. They mounted the engine (apparently properly ;-) but ... the 2 sensors were in a box. The 2 sensors * look almost identical (one has grey boot, the other has black) * with same pinout, * measure 1001 and 985 Ohm, respectively * has 3-pin AMP-style male connectors. ** using a '''DVM in DC mode, and a wrench, we checked in 1 minute that the mid-pin must be GND for proper polarity''' (and the pin at the side must be the signal). The proper polarity (with LM1815 that senses falling edge) means signal is positive when wrench gets closer to sensor and negative when wrench comes away ** Of course, in the factory wiring the GND (which is shared between the sensors, and probably with other sensors) is the other, so I need to '''swap the 2 wires in the harness to reverse polarity '''. This confirms what Miska documented earlier. * the holes at the very top of the clutch housing, see [http://vems.hu/files/MembersPage/MarcellGal/Audi/clutch/bay_no_engine_0015.jpg pic15] and [http://vems.hu/files/MembersPage/MarcellGal/Audi/clutch/gearboxshaft_0014.jpg pic14] look like those for VR sensor (maybe not: hard to tell with engine mounted). Not sure what this can be good for, though.... * See [http://vems.hu/files/MembersPage/MarcellGal/Audi/clutch/flywheel_0017.jpg pic17] for the 2 good candidates for crank135 and crankhome: both on the right side of the engine, close to each other. ** the front sensor is the crankhome. This sensor closer to the sky, it sits deeper in the housing, see [http://www.sjmautotechnik.com/trouble_shooting/20vtime.html SJM pages] We might have to scope it anyway, to verify crankhome polarity and HALL window position. Found some metric (M6?) screws, used a washer and an extra female to make it proper length, and mounted sensors in the 2 holes close to each other. Teppo said: * grey one reads flywheel teeth * black reads the pin behind the flywheel That is, with normal mounting. I will have to check (and document) if I followed the standard (colors: no other difference between sensors), or got it with colors swapped. ---- '''Useful links''' * http://www.sjmautotechnik.com/trouble_shooting/20vtime.html * http://www.sjmautotechnik.com/trouble_shooting/20vhall.html
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