Ducati Diavel Service Manual: Checking protection and safety device components
Checking the side stand switch
Remove the switch (1) from the side stand undoing screw (2) and disconnect the main wiring connector from the switch (see paragraph "routing of wiring on frame", sect. 6 - 1).
Use an analogue or digital multimeter (sect. 6 - 11, Using a multimeter to check the electrical systems) to check switch operation (see table).
Note
The same test may be carried out using the "dds" tester (sect. 6 - 11,
Diagnostic instruments). 
0 = Open contact
X = closed contact
Refit switch (1) to side stand and tighten the screw (2) to a torque of 5 nm +/-10 (sect. 3 - 3, Frame torque settings).
Checking the fuses
The main fuse box (1) and the secondary one (2) are located in the tool tray;
to reach the fuse box remove the seat as
specified under sect. 5 - 3 "Removal of the seat".
The fuses are accessed b ...
Other materials:
Cleaning and replacing the spark plugs
Spark plugs are essential to smooth engine running and
should be checked at regular intervals.
The condition of the spark plugs provides a good indication of
how well the engine is running.
Have the spark plugs inspected or replaced at a ducati dealer
or authorised service centre; they will ...
Checking drive chain tension
Important
Have chain tension adjusted by a ducati dealer or
authorised service centre.
Make the rear wheel turn until you find the position where
chain is tightest.
Set the vehicle on the side stand. Push down the chain at the
point of measurement and release.
Measure the distance betwee ...
Pre-ride checks
Warning
failure to carry out these checks before riding, may
lead to motorcycle damage and injury to rider and passenger.
Before riding, perform a thorough check-up on your bike as
follows:
Fuel level in the tank
Check the fuel level in the tank. Fill tank if needed (page 140).
Engine oil le ...