Sym Citycom.300i, Service Manual

Page: 69 / 270

4. Fuel Injection System
4-23
Numerical voltage changes that
the situation.
3. Used the diagnosis tool to confirm of O
2
sensor work situations:
●
Connected the "diagnosis tool" to diagnosis coupler and open the
main switch to start the engine.
●
Engine to be completely warm-up (idling state operation "5 minutes"
above).
●
Screen will switch to the diagnosis tool of "DATA STREAM 01/01"
screen, select " O
2
Sensor" project, and switches to a wave of
images, turn the throttle engine speed to about 4500 rpm,
Observation O
2
Sensor actuator circumstances.
●
Observation O
2
Sensor voltage values that the situation changes.
Detection judge:
●
Working voltage value: above 10V
●
Resistance value: 6.7~10.5 Ω
●
O
2
Sensor amendment in the voltage value of between 100 ~ 900 mV
beating; representatives pollution closed-loop control system to normal,
if contrary to maintain a fixed value for abnormalities.
Treatment of abnormal phenomena:
●
O
2
sensor damage, heater damaged or couplers to poor contact.
●
Check whether the abnormal wire harness lines.
●
O
2
Sensor anomaly, the proposed replacement of the O
2
Sensor ， and
measurements again.
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