Sym Citycom.300i, Service Manual

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4. Fuel Injection System
4-34
Can not Start the engine or difficult to start inspection
OK
NG
Check light extinguished after 2
seconds?
Display check light Fault Code?
Fuel system abnormal ?
Circuit abnormal?
Engine
abnormal
?
Difficulties or can not to start engine
1.
Inspection process in accordance with
circuit inspection
1. Use
diagnosis tool to view EMS fault
content
2.
In accordance with Troubleshooting
procedures on troubleshooting
1. Fuel tank inadequate?
2.
Fuel injector pressure-less than 294 „
6kpr?
3.
Pipeline fuel spills?
4.
Pressure Regulating Valve abnormal?
5.
Fuel pump pipe leakage?
6.
Fuel pump abnormal?
7.
Fuel injector abnormal?
1.
Spark plug there sparks?
2.
Spark plug humid?
3.
Spark plug cover loose?
4. Crankshaft position sensor Short
Circuit
5.
The high-voltage power lines loose?
6. ECU
abnormal?
7.
Leaking oxygen sensor connector
corrosion short circuit?
1.
Without valve clearance?
2.
Valve timing, is not correct?
3. Valve jam?
4.
Cylinder and piston ring wear?
5.
Throttle adjustment screw adjustment
of the air improper?
End
OK
NG
OK
NG
OK
NG
OK
NG
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