Sym MAXSYM 400i - Throttle Position Sensor (TPS)

4. Fuel Injection System
4-10
Throttle Position Sensor (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.
TPS
ECU
Battery
TPS
EC
U
5V
E
VTA
VC
6
4
2
0
50
100
150
TPS output voltage
Throttle valve opening angle
Voltage
To this chapter contents