PIAGGIO NRG POWER PUREJET, Руководство по ремонту, Страница: 144 / 248

THROTTLE POSITION SENSOR CIRCUIT (T.P.S.)
Specification Desc./Quantity
1 Key switch contacts
2 Fuse 20A
3 Battery 12V - 9Ah
4 Injection ECU
5 Coolant temperature sensor
6 Valve position sensor
The throttle position sensor (TPS) is a built-in part of the throttle body and cannot be removed. The
sensor receives 5V power (electronically determined) from the ECU. The 5V power is used for the TPS
sensor circuit and coolant temperature circuit. The TPS sensor is a double reading sensor, which means
two resistive tracks which generate two opposite signals defined as TPS1 and TPS2. The TPS1 signal
increases with increased throttle opening. The TPS2 signal decreases with increased throttle opening.
The two signals are equivalent at a single point corresponding to average opening (50%). The two
signals are converted to a percentage value of throttle opening. The dual reading system allows for
greater control, since the TPS1 and TPS2 signals are compared to each other and a reference map. If
missing or out of line TPS signals are detected autodiagnosis is activated and the related fault code is
generated. Faults are generated according to three priority levels. The TPS signals in combination with
the rpm-timing signal are the basic reference for the operation of the built-in injection - ignition system.
pure jet injection
NRG Power Purejet
INJ PJ - 28