S4 Sedan L5-2226cc 2.22L DOHC Turbo (AAN) (1992)
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Throttle Position Sensor: Description and Operation
Throttle Position Sensor
The Throttle Position Sensor and Closed Throttle Position Switch are in one housing. The housing is located on the throttle body and operated by the
throttle shaft.
The signal from the throttle position sensor represents the throttle valve opening. The throttle valve opening above 35° is used for charge pressure
control.
The signal from the throttle position sensor is used as a substitute function for the mass air flow sensor and diagnosis of the closed throttle position
switch. In case of a fault, the throttle valve opening of 28° is used as a substitute function and charge pressure control is switched off.
