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:

Specific tools for the frame
88713.1072 Drift to install half bearing in bottom yoke 88713.2562 Chain assembly tool 88713.1058 Wrench for steering shaft nut 88713.1062 Tool for installing steering head bearings 88713.2951 Rear wheel balancing tool 88713.3211 Wrench for adjustment of the eccentric hu ...

Removal of the clutch
Note For clarity, the figures show the engine removed from the frame. Undo the fixing screws (1) and remove the ring (2) and the springs (3) from the pressure plate (4). Slide the pressure plate (4) paying attention to the circlips (6). Remove the clutch control pin (14) and the ...

Refitting the cylinder head assemblies
Warning To prevent oil leaks past the contact area between cylinders and crankcase, each time the head is removed, cylinder and piston must be removed as well to clean the mating faces of crankcase and cylinder and restore the spoiled gaskets and o-rings and apply again liquid sealant (sect. ...

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