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View Full Version : Aprilia Tuono V4 / 7SM ECU



oxymoronic
8th August, 2018, 05:43 PM
Hi,

I've got an ECU from an older RSV4 that's HW100 the same as my 2011 Tuono V4. I was hoping to clone my existing ECU on to this as a spare and also to use it to try out different race maps. I've cloned the map and eeprom and the bike runs but I get a service warning on the dash and error code "U1721: no signal". From what I've read it's related to connectivity to the Bosch tilt sensor under the seat. I don't get this error with the original ECU so wondering if there's some hardware difference? All of the pins are good and clean on the clone so a bit confused. Any advice appreciated!

Cheers
Oxy