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:
Warning indication (alarms/signals)
The instrument panel activates in real-time some warnings /
malfunction that are not dangerous for the correct operation
of the vehicle.
At key-on (at the end of the check) one or more "warnings"
are displayed if they are active.
When a "warning" is triggered, the indica ...
Key-on/key-off using the pin code (immobilizer release)
Key-on can be performed by pressing the button (7) on the
hands free lock (1, fig. 77) Without the presence of the keys
(3, fig. 77) And (4, fig. 77) And entering the pin code on the
dashboard.
Key-off can be performed by pressing the button (6) on the
handlebar / hands free key (7) / engine ...
The immobilizer system
For additional antitheft protection, the motorcycle is
equipped with an immobilizer, an electronic system that
locks the engine automatically whenever the ignition switch
is turned off.
The grip of each ignition key contains an electronic device
that modulates the output signal from a special ...