Ducati Diavel
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Ducati Diavel Service Manual: The battery charging circuit and power distribution

On the diavel, the +15v (key on power) voltage does not come from a conventional ignition key, but from pin 30 of the hands free relay. This relay is switched to closed state by the hands free unit when the latter enables power on for the ignition and engine. The hands free relay receives +30v voltage (battery voltage), protected by a general 30a fuse.

The three phase alternator has three windings (l1, l2, l3), connected to one another in a "triangle" or "delta" configuration. The electrical terminals r, s and t are connected to the voltage regulator.

The battery charging circuit and power distribution


The drawing illustrates the "triangle" or "delta" configuration connection of the three windings of the three phase alternator.

The voltage regulator is constructed with specific electronic circuits (using mosfet instead of scr diodes) which limit operating temperature and, as a result, improve reliability. The regulator can withstand a maximum current of 50a (maximum current for the regulator used on sbk models is 35a) and has integrated waterproof electrical connections.

In the event of incorrect battery voltage (too low or too high), the message "battery" is shown in the service display. The dds also indicates if an excessively low or high battery voltage is detected (battery voltage diagnosis: high voltage, low voltage).

In the event of a battery charging circuit fault, check the following in the order given:

Riding modes
The rider may select between four different riding modes (sport, touring, urban and enduro) from the dashboard and via the "turn indicator reset" button (3). Each riding mode contains settings for ...

Ground connection locations
The negative cable, which is normally connected to the negative pole of the battery, is fastened to the crankcase. From here, the cable branches off and splits up within the electrical system to ca ...

Other materials:

Low beam lights not working
Location of connections and components (A) injection relay; (b) etv relay (throttle valve operating engine); (c) radiator fan relay; (d) hands free relay. Fuses located at the rear left of the vehicle. (1) 10A dashboard; (2) 5a engine control unit; (3) 15a key-sense; (4) 20a injecti ...

Refitting the hands free
Reassembly is a reversal of the removal procedure: in particular apply prescribed threadlocker to screws (2) and tighten them to a torque of 20 nm +/- 10% (sect. 3 - 3, Frame torque settings). If the hands free button has been previously removed, when refitting it insert the spring (6) on pi ...

Refitting the cooling system hoses and unions
Position the pump/radiator sleeve (22) and the radiator/radiator sleeve (23). Fit sleeve (23) and sleeve (22) to their corresponding fittings (n) and (o), and bring them fully home on collars (p). Note Sleeves (23) and (22) must be oriented so that the grooves (q) match the tabs (r) on fitt ...

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