Sym Wolf SB 250 Ni Service Manual page 71

3. Fuel Injection System
Difficult or unable to start engine
Warning lights extinguish
after 2 seconds?
Warning lights displays Fault
Code?
Fuel system anomaly?
Circuit anomaly?
Engine anomaly?
3-32
Difficult or unable to start engine
OK
OK
OK
OK
OK
END
NG
1.
Inspection process in accordance with
circuit inspection
1.
Use diagnostic tool to view EMS fault
NG
content
2.
Troubleshoot in accordance with
procedures on troubleshooting
1.
Fuel tank inadequate?
2.
Fuel injector pressure less than 294 ±
6kpr?
NG
3.
Fuel system leaks?
4.
Pressure Regulator anomaly?
5.
Fuel pump hose leakage?
6.
Fuel pump anomaly?
7.
Fuel injector anomaly?
1.
Spark plug sparks?
2.
Wet spark plug?
3.
Spark plug cap loose?
4.
Crankshaft position sensor Short
NG
Circuit
5.
The high-voltage power wire loose?
6.
ECU anomaly?
7.
O2 sensor connector corrosion, short
circuit?
1.
Without valve clearance?
2.
Incorrect valve timing?
NG 3.
Valve seized?
4.
Cylinder and piston ring worn?
5.
Improper adjustment of air adjusting
screw on throttle body?