Ducati Diavel
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Ducati Diavel Service Manual: Injection relay

Introduction

The fuel pump, injectors and ignition coils are all powered via the injection relay. The relay also sends voltage to the engine control unit, which enables activation of the relay itself.

Component assembling position

Injection relay


A injection relay; b etv relay (throttle valve actuator motor), c radiator fan relay, d engine control unit.

Connection wiring diagram

Connection wiring diagram


Ccm engine control connection, t injection relay. 85 Brown/black - bn/bk injection relay activation, 87 brown/white-bn/w ecu input voltage, u direct power to injectors, ignition coils and fuel pump, r battery power (+30), 30 and 86 brown - bn.

In the event of fault

In the event of an injection relay fault, the engine stops (if running) or will not start. The relay is not commanded by the ecu.

Fault codes generated and possible correlated faults

Fault codes generated by the engine control unit and displayed by the dds (fuel injection relay diagnosis):

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.

Check integrity of electric circuit - short-circuit to ground = with the battery cables disconnected, using an ohmmeter, continuity is detected between the wire tested and ground.

Check integrity of electric circuit - open circuit = with the battery cables disconnected, using an ohmmeter, no continuity is detected between the two ends of the wire tested.

The dashboard service display shows the error "fuel injection" and the eobd warning light activates.

Possible correlated faults: the engine stops (if running) or will not start. Check:

Using the dds, activate the ignition coils, the fuel pump or the injectors. The injection relay is driven and its contacts (pin 87 and pin 30) should close.

If none of the aforementioned tests identify the problem and the relay is in proper working order, replace the engine control unit.

Component replacement methods

No special measures are necessary in order to replace the injection relay.

Side stand button
Introduction The side stand button is located on the side stand. Together with the signal from the clutch button and the neutral signal generated by the gear sensor (transmitted to the engine cont ...

Throttle valve actuator motor relay
Introduction The throttle valve actuator motor is powered by the engine control unit. The engine control unit receives the necessary power from a specific relay. Component assembling position ...

Other materials:

Replacing the front phonic wheel sensor
Disconnect the front abs sensor (2) connector (a) from the main electric wiring. Open all the retainer clamps of the front abs sensor cable (2): refer to table of sect. 7 - 6, Flexible wiring/hoses positioning. Loosen retaining screw (1) and remove the front abs sensor (2) with ca ...

Adjusting the position of the gear change and rear brake pedals
The position of the gear change and rear brake pedals in relation to the footrests can be adjusted to suit the preferred riding position. To modify the gear change pedal position act in the following mode: hold the linkage (1) and slacken the counter nuts (2) and (3). Note Nut (2) has a lef ...

Removal of the cylinder/piston assembly
Loosen the clamps (7) and remove the hoses (8) and (9) from the cylinder barrels (10) and from the alternator-side crankcase cover. If damaged, unscrew the unions (6). Note The following procedure is described with the engine removed from the frame and the cylinder head r ...

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