Sym GTS 250 Service Manual page 222

3.TPS (Throttle Position Sensor):
1). Illustration:
2). Power Source:
By ECU
3). Check procedure:
1. Working Voltage Check
a). Use detection pin under TPS Sensor coupler connected; or disconnect the coupler to
measure the voltage readings directly from the ECU side.
b). Key-On, but don't start the engine.
c). Use the electric meter DCV function to check the TPS sensor voltage.
d). Check the working voltage:
‧Electric meter negative pole─ connect the upper pin of the Sensor (White / Brown)
‧Electric meter positive pole─ connect the middle pin of the Sensor ( Yellow / Black )
Upper
Middle
Lower
Throttle Position Sensor
PIN Wire Color
White / Brown
Upper (pin 1)
Yellow / Black
Middle (pin 2)
Lower (pin 3) Green / Red
(Like the following Figure 5)
Function
Ground Wire
5V Voltage input
Signal Output
7