Sym MAXSYM 400i Service Manual page 82

Closed-loop ● Observation O2
systems for senslor voltage
mobility changes (Standed
motorcycle so that
engine speed
refueling between
4500 to 5500 rpm
●
Engine Use diagnosis
vacuum tool to detect of
the manifold
pressure
Normal starting
l
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YES
● O2 sensor
voltage is
maintained in a
long time within
a certain range
beating
YES
●
Diagnosis tool
manifold
pressure for
compliance with
specifications?
YES
Finish
4. Fuel Injection System
● O2 sensor fault
● ECU fault
NG
●
Valve clearance is
NG
not normal
●
Intake system leak
Can not starting or starting difficulties
In traditional engine overhaul way to
maintenance
● O2 sensor
voltage beating
specifications:
100 ~ 900 mV
from the two
groups within
the interactive
beating
●
Manifold
pressure
Specifications:
32~38 kPa
4-37