Sym MAXSYM 400i Service Manual page 55

4. Fuel Injection System
Throttle Position Sensor (TPS)
TPS
Basic Principle
TPS is a rotary variable electric resistor. When it is rotated, both electric resistance and voltage value
change, determining the throttle position.
Function
TPS determines the throttle valve position and sends signal to ECU as reference of engine control.
4-10
To this chapter contents
ECU
TPS
EC
U 5V
VC
VTA
E
Battery
TPS output voltage
6
4
2
0
50 100
Throttle valve opening angle
150