Sym HD2 125 Service Manual page 97

5. Fuel Injection System
Can not Start the engine or difficult to start inspection
Warning lights extinguished after 2
seconds?
Display warning lights Fault Code?
Fuel system anomaly?
Circuit anomaly?
Engine anomaly?
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To this chapter contents
Difficulties or can not to start engine
OK
OK
OK
OK
OK
End
NG
1.
Inspection process in accordance with
circuit inspection
1. Use
diagnosis tool to view EMS fault
NG
content
2.
In accordance with Troubleshooting
procedures on troubleshooting
1.
Fuel tank inadequate?
2.
Fuel injector pressure-less than 294 ±
6kpr?
NG
3.
Pipeline fuel spills?
4.
Pressure Regulating Valve anomaly?
5.
Fuel pump pipe leakage?
6.
Fuel pump anomaly?
7.
Fuel injector anomaly?
1.
Spark plug there sparks?
2.
Spark plug humid?
3.
Spark plug cover loose?
4. Crankshaft position sensor
NG
Circuit
5.
The high-voltage power lines loose?
6. ECU
anomaly?
7.
Leaking oxygen sensor connector
corrosion short circuit?
1.
Without valve clearance?
2.
Valve timing, is not correct?
3. Valve jam?
NG
4.
Cylinder and piston ring wear?
5.
Throttle adjustment screw adjustment
of the air improper?
Short