KYMCO Downtown 300i ABS, Service Manual

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13. FUEL INJECTION SYSTEM
13-23
Downtown 300i ABS
O
2
SENSOR
The O
2
sensor issues signal to ECU when
the temperature is over 350°C during the
engine is working.
The temperature is up to 350°C earlier than
the muffler for O
2
heater sensor. So the O
2
sensor begins performance.
The function of O
2
sensor only controls the
fuel injector operation.
INSPECTION
Disconnect the O
2
sensor connector.
Measure the resistance between each White
wire terminals of the O
2
sensor side
connector.
Standard: 7.7±1.2
Ω
(at 20°C/68°F)
REMOVAL/INSTALLATION
Disconnect the O
2
sensor connector and then
remove it from exhaust muffler.
Installation is in the reverse order of removal.
Tighten the O
2
sensor to specified torque.
Torque: 2.5 kgf-m (25 N-m, 18 lbf-ft)
Apply anti-seize compound on the surface
of thread area before O
2
sensor
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