Ducati Diavel Workshop Manual page 335

BBS and DB faults
BBS BBS unit connection, S gear position sensor. BBS 15 brown/red – Br/R (5V), BBS 13 yellow/green Y/G, BBS 10
black/blue – Bk/B.
Location of connections and components
Location of gear sensor connection.
PIN numbering of wiring harness side BBS unit connection.
Checks
The gear sensor is a Hall effect unit. Ground is on PIN 10 of the BBS unit, 5 V power is on PIN 15 of the BBS unit, PIN 13
of the BBS is the input for the signal generated by the sensor. Check that the sensor receives 5 V power.
Check the integrity of the electrical circuit and connections (short-circuits to ground, short-circuits to Vdc, open circuits).
Perform the gear self-acquisition procedure.
If none of the aforementioned tests identify the problem, replace the gear sensor then perform the gear self-acquisition
procedure. If the fault has not been resolved, replace the BBS unit.
Warning
The engine control unit uses the neutral engaged signal generated by the gear sensor, together with the clutch lever
pulled signal, to manage idle speed.
Note
Check integrity of electric circuit – short-circuit to Vdc = with dashboard on, using a voltmeter, a voltage is measured
between the wire tested and ground.