C15" Wt Sensor Circuit Malfunction - HYOSUNG AQUILA 650 FI Service Manual

4-1-23 FI SYSTEM DIAGNOSIS

"C15" WT SENSOR CIRCUIT MALFUNCTION

DETECTED CONDITION
Output voltage is out of the specified range.
0.2 V � Sensor voltage � 4.6 V
▣ ▣ INSPECTION
◈ Step 1
1) Turn the ignition switch "OFF" position.
2) Check the WT sensor coupler for loose or poor
contacts.
If OK, then measure the WT sensor voltage at the
wire side coupler.
3) Disconnect the coupler and turn the ignition switch
"ON" position.
4) Measure the voltage between Br wire terminal and
ground.
5) If OK, then measure the voltage between Br wire
terminal and BW wire terminal.
WT sensor voltage
Tester knob indication : Voltage (
Is the voltage OK?
YES Go to Step 2.
● Loose or poor contacts on the
ECU coupler.
NO
● Open or short circuit in the Br
wire or BW wire.
4.5 ~ 5.5 V
( � Br - � Ground )
( � Br - �
BW )
)
POSSIBLE CAUSE
● WT sensor circuit open or short.
● WT sensor malfunction.
● ECU malfunction.
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