Sym GTS 250 Service Manual page 232

8.Fuel Pump:
1). Picture Illustration :
Pump motor
2). Power Source:
a). Power Source →Fuel Pump is provided by battery
3). Check procedure :
Fuel pump working voltage confirmation.
a). We can measure the voltage whether the coupler is connected or not. If connected, use
the detection pin to penetrate the wire. The pin assign is like the following figure 15.
b). Key-On, but don't start the engine.
c). Use the electric meter DCV function to check the voltage of Fuel Pump.
d). Check the working voltage: (Shows in Figure 15)
Electric meter negative pole ─ connect to the second pin of coupler (Green)
Electric meter positive pole ─ connect to the first pin of coupler (Purple )
Liquid-level gauge
The fuel gauge is from ECU
Figure 15a Measurement of Fuel Pump Working Voltage
Liquid level
guage(-)
(Green)
Fuel Pump(-)
(Green)
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