Throttle Valve Operation Engine - Ducati Diavel Workshop Manual

Introduction to the engine control system
V Vertical cylinder injector, R injection relay. CCM engine control connection, 1 power connection (12V) via injection relay
(brown/white – Bn/W), 2 connection to control unit (green/yellow – G/Y).
In the event of fault
The cylinder associated with the faulty injector does not function.
Fault codes generated and possible correlated faults
Fault codes generated by engine control unit and displayed by DDS (Vertical injector diagnosis (inj. 2), Horizontal injector
diagnosis (inj. 1)):
- Injector 1 (cylinder 1 - horizontal) and/or Injector 2 (cylinder 2 - vertical), open circuit: check integrity of electric circuit
and electrical connections.
- Injector 1 (cylinder 1 - horizontal) and/or Injector 2 (cylinder 2 - vertical), short circuit to Vdc: check integrity of electric
circuit and electrical connections.
- Injector 1 (cylinder 1 - horizontal) and/or Injector 2 (cylinder 2 - vertical), short circuit to ground: 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 "Injector" and the EOBD warning light activates.
Possible correlated faults:
- If the engine does not start and the injectors are not supplied with 12 V, check the injection relay operation (see
paragraph "Injection
- If the engine is running on once cylinder only and one of the injectors does not open, try swapping the injectors. If the
fault (no injector opening) follows the injector, the injector itself is faulty. If the fault does not follow the injector, the
relevant control circuit is faulty.
- If the engine runs irregularly, check the pressure and flow rate in the fuel circuit (see paragraph
this section) and check that the injectors atomise the fuel correctly.
The injectors may be actuated from the DDS to check that they function correctly.
If none of the aforementioned tests identify the problem and the injectors are in proper working order, replace the engine
control unit.
Component replacement methods
The injectors replacement do not foresee particular measures, proceed as described in Sect. 8 - 6,
injectors. With the fuel system pressurised, check that there are no fuel leaks from the connector. After replacement of
one or both of the injectors, reset the self-adaptive parameters relative to carburation with the DDS.

Throttle valve operation engine

Introduction
The electric motor actuating the throttle valve for the vertical cylinder is mounted on the throttle body of the Diavel, while
a link rod connects the vertical cylinder throttle valve to the horizontal cylinder throttle valve. In the electric motor, the
throttle valve position sensor (TPS) is integrated.
relay") of this section.
"Fuel system circuit" of
Removal of the fuel