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
A injection relay; b etv relay (throttle valve actuator motor), c radiator fan relay, d engine control unit.
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):
- Open circuit: check integrity of fuses, electrical circuit and electrical connections.
- Short circuit to ground: check integrity of fuses, electrical circuit and electrical connections.
- Short circuit to vdc: check integrity of electric circuit and electrical connections.
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:
- Integrity of fuses
- Relay function. After removing from its mounting, apply 12 v power to pin 85 and pin 86 of the relay and check that pin 87 and pin 30 close (continuity between pins)
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:
Tips for use on the track
We recommend level 8 be used for a couple of full laps (to
allow the tyres to warm up) in order to get used to the
system. Then try levels 7, 6, etc., In succession until you
identify the dtc intervention level that suits you best (always
try each level for at least two laps to allow the tyres t ...
Engine start button
Introduction
The engine start button is located on the right hand handlebar switchgear set
and is used to turn the engine on.
Component assembling position
The engine start button is included in the switchgear set on the right hand
handlebar.
Location of right hand handlebar switchge ...
Removal of the steering head components
Note
All parts fitted to the top and bottom yokes, including the wiring and
control cables, can remain on the motorcycle
provided they do not hinder the following operations.
Loosen the screws (19) securing the supports (21) and (23) of splashguard
(22) to the air conveyors (t).
...