Sym GTS 250 Service Manual page 236

3). Check procedure:
Ⅰ). Electrical resistance measurement:
a). Use the Ohm function of electrical meter to check the resistance value of fuel injector.
(As shown in figure 20.)
Ⅱ). Injector integrity inspection:
a). Remove the holding bolts of injector, but keep the fuel source steady.
b). Hold the injector with hands, normally there should be no leakage found.
c). Key-on and start the engine, observe the fuel injection condition.
4). Malfunction determination:
Ⅰ). The electrical resistance value between two pins = 11.7 ± 0.6 (Ω)
Ⅱ). Injection status:
a). Good nebulization: Widespread fuel spray indicates normal injector integrity.
(As shown in figure 21.)
Figure 21. Good nebulization- normal injector
Figure 20. Measuring fuel injector electrical
resistance.
21