Throttle Unit (4/50) [2019-2022]: Description

The throttle unit includes an electrically controlled shutter that regulates the amount of air that passes through to the engine.

The Engine Control Module (ECM) controls the Electronic throttle unit with a PWM signal that sets the shutter position. A potentiometer registers the position of the shutter, which is sent as one analog 0 - 5 V signal in a diesel engine and as two analog 0 - 5 V signals in a petrol engine. The signals are sent to the Engine Control Module (ECM).