25 *
26 CAN H
27 CAN L
28 ABS warning light input (if present)
29 *
30 Sensors ground connection
31 +Battery
32 Rear left turn indicator activation
33 Rear right turn indicator activation
34 Aerial 1
35 Low beam light relay activation
36 Exhaust valve A control output
37 Exhaust valve B control output
38 Ground connection
39 Ground connection
40 Ground connection
Can line
Function
It allows communication between the Marelli injection ECU and the instrument panel.
Operation / operating principle
CAN SYSTEM ADVANTAGES
A CAN (controller Area network) line is a connection among the vehicle several electronic devices,
organised as a computer network (Internet). The CAN network has greatly simplified the electrical sys-
tem layout and consequently, its complexity. With this communication line, needless duplication of
several sensors present on the motorbike has been obviated. The sensor signals are shared by the two
electronic elaboration units (instrument panel and control unit).
•
Cable number reduction: The CAN line travels through a twisted cable to several nodes.
•
These nodes can also isolate the errors without causing a system breakdown (FaultsCon-
fination).
•
Immunity to interference: the signal travels through two cables and the signal reading is
differential (voltage difference between the two signals on both cables). If the two signals
are disturbed by an external factor, their difference remains unaltered.
•
Communication speed: messages travel at a speed of 250 kbps (data arrive at nodes every
20 ms, i.e. 50 times/second).
CAN PROTOCOL (CONT. NETWORK AREA)
The communication protocol is CSMA/CD (Carrier Sense Multiple Access w/ Collision Detection).
RSV4 R Electrical system
ELE SYS - 221
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