Aprilia Consumer Service Spa
Technical Service and Training
Release 4 july 99
This material is didactic and
may be changed following the technical
development of the product
3.1 THE E.C.U.: ELECTRONIC CONTROL UNIT
The injection system and ignition system operation are controlled by the Nippodenso ECU, code no.
265470 (not final!!!).
The control unit is connected to the rest of the bike’s electrical system by two ‘fast’ connectors. As
well as being fed with power and receiving signals from the sensors through these connectors, the
control unit also controls the injectors and l.t. ignition coils and dialogues with the panel and, in
addition, checks that the correct torque is transmitted to the wheels. The figure below gives a basic
outline of these connections:
The ECU is governed by an 8 bit/8Mhz CPU which performs the logic and control functions. The
calculation tables and algorithms are resident in the E-PROM.
Centralina ECU: C.S.
Centralina ECU
E-PROM SU ZOCCOLO
CONNETTORI ECU
C.P.U.