"C22" Oxygen Sensor Circuit Malfunction - HYOSUNG MS3 250 Sercie Manual

"C22" OXYGEN SENSOR CIRCUIT MALFUNCTION

DETECTED CONDITION
Oxygen sensor signal is not input in ECU since then
more than 120 sec after the engine run.
▣ ▣ INSPECTION
1) Remove the right side front lower cover.
2) Turn the ignition switch "
3) Check the Oxygen sensor coupler for loose or
poor contacts.
Is OK?
● BR or BW wire open or shorted
to ground, or poor �
connection.
● If wire and connection are OK,
YES
intermittent trouble or faulty ECU.
● Recheck each terminal and wire
harness for open circuit and poor
connection.
NO Replace the Oxygen sensor.
" (OFF) position.
or ⑤
POSSIBLE CAUSE
● Oxygen sensor, Oxygen sensor heater circuit open
or short.
● Oxygen sensor, Oxygen sensor heater malfunction.
● ECU malfunction.
�
ECU Coupler
FI SYSTEM DIAGNOSIS 4-26
⑤