Sym JOYMAX 250 User Manual

20
After measuring the fuel pressure, we MUST check the following joints to see if any leakage
found. For example, the injector or the fuel pump joints shown in figure 19. This must be done
to ensure safety.
4). Malfunction determination:
a). Fuel pimp working voltage= over 10V
Liquid-level working voltage= over 5V
b). Liquid-level gauge electrical resistance value = 7~95±5Ω
c). Fuel pump normal pressure = 294 ± 6 Kpa
5). Abnormal phenomenon and treatment:
a). Pump coil damaged or bad contact in coupler.
b). Congested filter.
c). Pump abnormal, replace with a new pump.
d). Liquid-level gauge abnormal, replace with a new component.
9. Fuel Injector:
1). Picture illustration:
2). Power source:
Power source → Battery
Figure 19 Possible leaking points after Fuel pressure measurement

Sym JOYMAX 250 Specifications

General

Brand	Sym
Model	JOYMAX 250
Category	Scooter
Language	English