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Structure and inner electrical connection

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The servo-motor employed to adjust the position of the throttle valve is a DC motor. The throttle-valve sensor is a Hall-effect device. The hall effect sensor determines the revolutions of the servomotor. This provides the basis for calculating the position of the throttle valve.

Fig 1: Throttle Actuator - Circuit Diagram
G09910286Courtesy of BMW OF NORTH AMERICA, INC.
Item Explanation
1 Throttle-valve actuator with throttle valve
2 Hall effect sensor
3 Electronic component with evaluation electronics
PIN REFERENCE

Pin Explanation
SIG1 Positive connection for controlling activation of throttle-valve actuator
SIG2 Negative connection for controlling activation of the throttle-valve actuator
5 V Voltage supply for throttle valve sensor
Terminal 31E Terminal 31E, electronics earth, throttle valve sensor
SIG3 Throttle-valve sensor signal