Throttle Position Sensor: Description and Operation

THROTTLE POTENTIOMETER:




In the Boxster, the throttle position is determined via a potentiometer fitted to the throttle linkage. The DME control unit supplies the potentiometer with a regulated voltage (5 V). Depending on the potentiometer position (throttle opening angle), a higher or lower drop in voltage occurs at the potentiometer. The DME control unit uses the voltage drop and the corresponding current flow to determine the smallest opening angle for the throttle. This angle is defined as the "idle position."