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This engine has a custom 10+1 trigger (5 pins on crankwheel).
Such installs are usually problemfree (and installer does not care to document publicly). This install involves some fighting for some reason, page created to summarize that (thematically, not chronologically). |
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This Audi 5 cyl (20VT) engine has a home-made custom 10+1 trigger (5 pins on crankwheel).
Such installs are usually problemfree (and installers don't care to document publicly). |
| ECU serialnumber v3/6110 |
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Page created to summarize that (thematically, not chronologically).
* This install has stalled: installer needs to verify polarity of primtrig VR signal (and likely polarity swap is needed) before any further progress ** a scope would be very desirable to see primtrig-VR pulsetrain ** also don't forget to upload vemscfg, see FileArea |
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Primary trigger
* VR, 5 pins on crank |
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Secondary trigger
* auditrigger, that is sectrig crankhome-VR masked by cam-HALL, which is (same software setup) but over-complicated hardware (more chance for error) * NOT just HALL, 1 pin on cam that would be simple Yes, Just HALL, i pin on cam. |
| ECU serialnumber v3/6110 |
| The CAM-trigger is Audi original from AAN (behind the cam pulley). |
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Primary trigger
* VR, 5 pins on crank (the crankhome-VR sensor that is 1 pin and used as sectrig with the original factory setup is 5 pins and used as primtrig in this case !) ** is it 1 original pin and 4 pins made of ... ? Material, dimensions, etc... ? ** POLARITY IS UNCERTAIN, MUST BE VERIFIED GenBoard/Manual/VrSensor/Polarity (not just "changed" and let's see, but verified and left with good polarity - take note of wire colors for later reference). ** InputTrigger/RunOut can be a problem if the amplitude of pulses vary by large. (the noise suppression feature of LM1815 treats a tooth with 75% amplitude as noise after a 100% amplitude peak, which is good for good pulsetrain but hurts for sloppy toothtrain... can be disabled by "allow very sloppy wheel on primtrig=VR" in order comment (R181 would be made higher). *** for sectrig that is often sloppier more room is allowed (R182 > 150k) by default, but for primtrig a relatively even aplitude is usually the case so the default noise suppression is used unless explicitely requested otherwise. ** good signal with good polarity makes falling edge cleanly pass over 0.0V as "Geber for Zündzeitpunk" on InputTrigger/AudiTrigger Secondary trigger * just HALL, 1 pin on cam - Audi original from AAN (behind the cam pulley). ** NOT auditrigger ( which would be sectrig crankhome-VR masked by cam-HALL) |
| Audi 5 cyl. 5 trigger references on crank. 1 cam signal. |
| The setup is original for the engine and the sensor is VR. |
| Not impossible, but would be nice to see 2 occasions captured (a triggerlog and a vemslog also). VR trigger is primary candidate, check polarity (both primtrig and sectrig) at least with the DVM DC mode and "pull-away metal" method, or best with oscilloscope. |
| Not impossible, but would be nice to see 2 occasions captured (a triggerlog and a vemslog also). VR trigger is primary candidate, check polarity (both primtrig and sectrig) at least with the DVM DC mode and "pull-away metal" method, or best with oscilloscope ! |