Butterfly Valve In Exhaust - APRILIA RSV4 R Service Station Manual

RSV4 R
RUN / STOP switch
•
Run/Stop
NOTES
•
Indication on Axone always STOP: disconnect the connector and, with the switch set to
RUN, check if there is continuity towards the two cables switch - blue/green and yellow/red:
If there is not continuity, replace the sensor; if there is continuity, check the connector: if not
OK, restore the cable harness; if OK, check, with key set to ON, if there is voltage on Yellow/
Red cable: if there is no voltage, restore the cable harness; if there is, check the yellow/red
cable ground insulation: If there is continuity with ground connection, restore the cable har-
ness; if OK, set the key to OFF and check the VEHICLE connector and the engine-vehicle
cable harness connector: if not OK, restore; if OK, check continuity of the Yellow/Red cable
between switch connector and PIN C7 of the engine-vehicle cable harness connector and
between the PIN C7 and the VEHICLE connector PIN 78: if not OK, restore the cable har-
ness; if OK, replace the Marelli control unit.
•
Indication on Axone always RUN: disconnect the connector and, with the switch set to
STOP, check if there is continuity between the two cables of the switch: if there is continuity,
replace the switch; if there is not continuity, it means that, with key set to ON, the yellow/red
cable (between switch and the PIN C7 of the engine-vehicle cable harness connector or
from the latter to the PIN 78 of the control unit connector) is shorted to positive: restore the
cable harness.

Butterfly valve in exhaust

Function
It is used to reduce exhaust noise. The exhaust
valve is open, when a gear is engaged, in any
condition, and closed in neutral if vehicle speed is
equal to 0 km/h (if speed is different from zero, the
valve is open).
Operation / Operating principle
The system consists of a throttle valve with a re-
turn spring placed on the exhaust pipe. The valve
is closed via two cables actuated by an electric
motor, which, in turn, is connected electrically to
the instrument panel. The operating logic and mo-
tor control are, however, resident in the Marelli
injection control unit, which dialogues with the in-
strument panel via the CAN.
Electrical system
ELE SYS - 209