SLK 230 (170.449) L4-2.3L SC (111.983) (2001)
Electronic Throttle Actuator: Description and Operation
GF30.22-P-4101-02GS Throttle Valve Actuator, Function
GF30.22-P-4101-02GS Throttle Valve Actuator, Function
The actuator motor (M16/6m1) in the throttle valve actuator (M16/6) shifts the throttle valve (1) continuously from around 0 to up to 90 degrees
according to input from the engine control unit.
Hereby, the actual value potentiometer (M16/6r1, M16/6r2) indicates the current position of the of the throttle valve to the engine control unit.
A. Ignition "Off"
In the absence of voltage, the position of the throttle valve is determined by the spring capsule (2) (10 to 12 degrees opening angle).
B. Ignition "On"
When the ignition is switched on, the actuator motor in the throttle valve actuator is operated by the engine control unit.
The throttle valve adopts a position which depends on the coolant temperature.
C. Idle speed
Depending upon the coolant temperature and engine load, the actuator motor changes the rpm in the idle speed range by opening the throttle valve
further (increased mixture) or closing it further.
(less mixture).