Check and replace throttle valve potentiometer: Function and fault diagnosis

The throttle valve potentiometer determines the opening angle of the throttle valve. This information is then forwarded to the control unit and used as a parameter for calculating the necessary fuel quantity. It is mounted directly on the throttle valve shaft.

The throttle valve potentiometer is an angle transmitter with a linear characteristic curve. It converts the respective throttle valve opening angle into a proportional voltage ratio. When the throttle valve is actuated, a rotor connected to the throttle valve shaft slides over resistance tracks with its sliding contacts, which converts the throttle valve position into a voltage ratio.