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4-19 FI SYSTEM DIAGNOSIS
◈ Step 3
1) Connect the TP sensor coupler.
2) Insert the needle pointed probes to the lead wire
coupler.
3) Turn the ignition switch "
Measure the TP sensor output voltage at the
coupler (between �
throttle grip.
TP sensor output voltage
Throttle valve is closed
Throttle valve is opened
Tester knob indication : Voltage (
Is the voltage OK?
● OB, LY or BW wire open or
shorted to ground, or poor � , ⑥ ,
or ⑤
● If wire and connection are OK,
YES
intermittent trouble or faulty ECU.
● Recheck each terminal and wire
harness for open circuit and poor
connection.
If check result is not satisfactory,
NO
replace TP sensor with a new one.
" (ON) position.
LY and �
BW) by turning the
Approx. 1.12 V
Approx. 4.18 V
connection.
)
�
⑥
⑤
ECU Coupler
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