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Electrical system
RUN / STOP switch
•
Run/Stop
NOTES
•
indication on the diagnostics tool 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 harness; 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
Pink cable between switch connector and PIN C7 of the engine-vehicle cable harness con-
nector and between the PIN C7 and the VEHICLE connector PIN 78: if not OK, restore the
cable harness; if OK, replace the Marelli control unit.
•
indication on the diagnostics tool 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
Pink 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
butterfly valve is managed as follows:
•
With engine off: open by 75%
•
With engine running: regardless of the
gear engaged, below 5,500 rpm and
below 14° of throttle opening it is fully
closed; over 6,500 rpm or 16° of throttle
opening it is fully open; under any other
condition it is in an intermediate posi-
tion. With bike stopped and in neutral
the valve stays closed, regardless of
rpm.
Operation / Operating principle
ELE SYS - 214
TUONO V4 R a-PRC ABS
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