Audi I5 3B engine
Verdi dry sump system
VAG lupo 60-2 trigger on crank
Honneywell Hall trigger on camshaft
4 Kpa onboard MAP-sensor
vag 115r ign-coils
triple bosch 044 fuel pumps, connected via two 30A relays with flyback diode.
Vems box is dead due to use of a old faulty battery-charger,
ec36 pin25 is short to ground. (3A fused)
Worked fine untill the battery-charger was connected.
Melts the fuse instantly as you power on ignition key.
Most likely Cause
The 'old faulty battery charger' has most likely provided a much to high voltage to the ecu (>18v), there is a protection inside the ecu that trips and blows the fuse when this happens. See D22 (How can one find this ? On GenBoard/VerThree/Schematic at EC36/pin25 the keyword is "13.8V" , search for "13.8V" on the schematic drawing to find D22 ).
If and large fuse was used it can permanently fuse the over voltage (transient suppression diode) device also.
The rescue kit (GenBoard/VerThree/RescueKit) should have a replacement diode marked: 1.5KE18 (is 18V). If not the diode can be cut until a valid replacement has been ordered from [webshop]. I have annotated its location on v3 picture here (inside yellow circle):
Best regards, Dave