Ducati Diavel Workshop Manual page 278

Introduction to the engine control system
The two diagrams illustrate the operating principle of the ride-by-wire system and the monitoring and control functions
performed by the internal ECU circuits. As can be seen, the APS consists of a potentiometer with two elements (MAIN and
SUB), with independent power supply and ground. The TPS also has a potentiometer with two elements (also MAIN and
SUB), but with common power supply and ground. The CPU is the processing core of the control unit, the IPD (integral-
proportional-derivative controller) is the control circuit and the LSI is a Large Scale Integrated Circuit that controls the
power relay on the exterior of the actuator. When necessary (in the event of malfunction), this circuit and the CPU
generate a signal that inhibits the electric throttle valve actuator motor. In this case, the throttle valves are returned to
the closed position by a spring on the throttle body.
The image shows the throttle body seen from the intake side. The accelerator sensor (APS) is visible on the left, while the
electric actuator (motor driving the throttle valves), which also incorporates the throttle valve sensor (TPS), is on the
right. The electric actuator operates the vertical cylinder throttle valve directly, and operates the horizontal cylinder
throttle valve via a link rod.
When removing the airbox, the throttle body remains fixed to the bottom of the air box itself.
The throttle body is fastened to the rubber intake pipes with metal clamps.