C22" Oxygen Sensor Circuit Malfunction - HYOSUNG GV250 EI Service Manual

"C22" OXYGEN SENSOR CIRCUIT MALFUNCTION

C22
DETECTED CONDITION
Oxygen sensor signal is not inputted in ECU since then
600 sec. after the engine run.
▣ ▣ INSPECTION
1) Remove the front seat and frame cover.
2) Turn the ignition switch "OFF" position.
3) Check the Oxygen sensor coupler ① for loose or
poor contacts.
Sensor side
GR BR
Is OK?
● BR or GR wire open or shorted
to ground, or poor
connection of ECU coupler.
● 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.
CODE
[ 2
Heater side
B OB
or
H3 C4
2 2 2
POSSIBLE CAUSE
● Oxygen sensor, Oxygen sensor heater circuit open
or short.
● Oxygen sensor, Oxygen sensor heater malfunction.
● ECU malfunction.
H3
49
EI SYSTEM DIAGNOSIS 4-1-34
CODE
2 2 ]
O sensor
2
①
C4
ECU Coupler