Ducati Diavel Workshop Manual page 298

Introduction to the engine control system
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 throttle valve actuator motor relay. 85 throttle valve actuator motor relay activation,
light blue/green – Lb/G, 87 ECU power input for throttle valve actuator motor, red/brown R/Bn, 30 and 86 red/purple –
R/V, R battery positive (+30).
In the event of fault
In the event of a throttle valve actuator relay fault, the ECU cuts motor power and the throttle valves close (see chapter
Operating principle and characteristics of the ride-by-wire system
Fault codes generated and possible correlated faults
Fault codes generated by the engine control unit and displayed by the DDS (ETV relay diagnosis):
- Throttle valve actuator motor relay malfunction (no specific fault indicated by DDS): check integrity of the fuses,
electrical circuit and electrical connections and check relay function. After removing from its mounting, apply 12 V power
to PIN 85 and PIN 86 and check that PIN 87 and PIN 30 close (continuity between pins).
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 "ETV relay" (throttle valve actuator motor relay) and the EOBD warning
light activates.
Possible correlated faults: The engine does not start, cuts out or remains running at idle speed and will not accelerate.
Check:
- Integrity of fuses.
- Relay function.
The throttle valve actuator motor may be actuated into one of the three preset positions (0%, 50%, 100%) using the
DDS. During motor actuation, the throttle valve actuator motor relay is driven.
in this section).