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Summary of change:
Audi 3B engine is similar to VemsAudiAan, so procedures are the same, but * the [http://vems.hu/download/v3/Motronic55/Audi/ relevant] pinout (file, or spreadsheet column) must be used due to pin differences ** eg. flyback is same mot55/pin37 ** but trigger pins are different ---- '''3B relay''' MembersPage/PeterJensen/AudiSwiring 3Bpin37 is flyback (EC36pin23). Injectors are supplied from the ECU via this pin (3B is different from the AAN/ABY/ADU in this respect). 3B ECU internal relay (standard, unless requested otherwise): '''Relay coil powered from:''' * '''mot55/27''' +12V when ignition is ON (EC36/25 ECU supply pin) * '''GND''' '''Relay output "normally open"''' (closed when ignition is ON = ECU is powered up) * '''3B MOT55/pin18''' (VBATT constant +12V, even alive when ignition is off) * '''3B MOT55/pin37''' (EC36pin23). Injectors of the 3B harness are supplied from the ECU via this pin. The idea is NOT to draw much (2A+) current from 3Bpin27 because we fear that might damage the ignition switch (we didn't try or measure though). ---- '''Ignition output(s)''' * Either just 1 igncoil can be used, with distributer * or custom ignition output mapping for passive coils, or active coils ** Audi POS power output stages + passive coils together are effectively "active coils", because the ECU can drive with logiclevel positive-active signal. Eg. 4 stepper outputs (possibly with 100 Ohm protection resistors) and a logiclevel ignition output on an extra (eg. EC10 flyingloom) connector possible for 5 COPs if requested. ---- '''Fuel pressure regulator''' * target pressure might differ from AAN ** eg. 3.5 bar instead of 4 bar FP means sqrt(4 / 3.5)=1.069 so 6.9% (7%) more fuel injection PW required, consider this when tuning (or when adapting borrowed tables) ** remember the first 1.4msec of the fuel pulsewidth is just to get it open
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