Introduction
The on/off switch on the handlebar is used to switch the dashboard on and off, if a key has been detected, and start the engine.
With the switch turned to "run off" (centre position), pushing downwards switches the dashboard on or off (activating the button inside the switch).
Wiring diagram

The button inside the on/off switch receives 12 volt power directly from the battery via the main 30 a fuse. When pressed, it sends the 12 volt power to the hands free system, which detects activation of the button. On/off switch pin 8, light blue wire (lb), on/off switch pin 5, red wire (r).

Pinout of right hand handlebar switch connection, wiring harness side.

Location of the right hand handlebar switch connection.
Error codes
The hands free system generates no fault code in the event of a fault of the on/off switch on the handlebar.
Electrical characteristics and checking component
The switch receives 12 volt power directly from the battery via the main 30 a fuse.
Check for 12 volts on pin 5 of the switch.
Check for 12 volts on pin 6 of the hand free system side connector with the switched pressed. The voltage measured must be 0 volts when the switch is not pressed.
In the event of fault
In the event of a fault of the on/off switch on the handlebar, the button integrated into the hands free system may be used instead.
Installation location

The image shows the location of the on/off switch, near the throttle grip on the right hand side of the handlebar.
Communication antenna
The hands free relayRefitting the filler cap
Position seal (18) in tank cap (10) as shown and reassemble following the
removal procedure in the reverse sequence.
In particular tighten the screws (17) to a torque of 3 nm +/- 10% (sect. 3 - 3,
Frame torque settings).
...
Check the idle and the co amount with warm engine
Start the engine;
Switch on the dds and check that it does not signal any error (otherwise
consult the relevant paragraph of this manual
to reset the error and proceed with the idle check);
Enter the "self diagnosis" menu by selecting the diavel model in the
available vehicle version. ...
Gear indicator display on dashboard shows dashes, engaged gear not displayed
correctly, idle speed irregular
with gearbox in neutral
Fault codes
Dds: gear sensor diagnosis -> short circuit to ground or open circuit (s.C.
Gnd or c.O.) - Short circuit to vdc (s.C. Vdc)
- congruence (generic error - signal not correct).
Dashboard: the error "gear sensor" is shown on the service display. The eobd
warning light activates.
...