Throttle position
Throttle position |
Throttle position sensor |
The throttle position sensor in the MOTRONIC system consists quite simply of a variable resistor controlled by the position of the throttle butterfly which regulates the signal level and so supplies the control module with information on the current throttle opening.
Pin 1 of the throttle position sensor receives power (5 V) from pin 12 of the control module. Pin 2 is grounded through pin 30 of the control module.
Information on the current angle of the throttle is sent from pin 3 of the sensor to pin 53 of the control module. Signal voltage varies between about 0.5 V (idling) and about 4.5 V (full throttle).
In the event of a break or short circuit in the circuit, the CHECK ENGINE lamp (MIL) lights up.
Throttle angle |
A signal containing information on the current throttle angle goes out from pin 54 of the control module. This information is used by the automatic transmission control module and the TCS control module.
The signal is a 100 Hz PWM signal of approx.
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1.2 V at idling speed
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2.0 V at 2500 rpm (no load)
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