KYMCO Downtown 350i, Repair Manual

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3.External Components
Downtown 350i
3-24
O
2
Sensor
Removal
Remove the O
2
sensor with a 17 mm wrench. Use care not to pinch the wires.
The O
2
sensor issues signal to ECU when the temperature is over 350°C while
the engine is running.
Test the O
2
sensor at room temperature.
Use a digital multimeter set to ohms of resistance to inspect the O
2
sensor.
Measure the resistance between the white wire terminals of the O
2
sensor
connector. Replace the O
2
sensor if the reading is out of specification.
ITEM SPECIFICATIONS
O
2
heater sensor resistance (at 20°C/68°F) 6.7 - 9.5 Ω (engine warming condition)