HYOSUNG AQUILA 250 FI, Service Manual, Page: 31 / 90

30
4-1-21 FI SYSTEM DIAGNOSIS
◈
Step 2
1) Turn the ignition switch “OFF” position.
2) Measure the ET sensor resistance.
Resistance (To ECU) Engine Temp.
ET sensor resistance
Approx. 28.788
㏀
Approx. 12.209
㏀
Approx. 5.671
㏀
Approx. 2.845
㏀
Approx. 1.525
㏀
0
℃
(32
℉
)
20
℃
(68
℉
)
40
℃
(104
℉
)
60
℃
(140
℉
)
80
℃
(176
℉
)
Is the resistance OK?
Tester knob indication : Resistance (
㏀㏀
)
YES
NO
Replace the ET sensor with a new
one.
ECU Coupler
⑧
⑤
●
G or BW wire open or shorted to
ground, or poor
⑧ or ⑤ connection.
● If wire and connection are OK,
intermittent trouble or faulty ECU.
●
Recheck each terminal and wire
harness for open circuit and poor
connection.