HYOSUNG MS3 250 Sercie Manual page 127

◈ Step 2
1) Turn the ignition switch "
2) Measure the injector voltage between YG wire and
ground.
Injector voltage
Tester knob indication : Voltage (
NOTE
Injector voltage can be detected only 3
seconds after ignition switch is turned "
(ON) position.
Is the voltage OK?
● YG wire open or shorted to ground,
or poor �
● If wire and connection are OK,
YES intermittent trouble or faulty ECU.
● Recheck each terminal and wire
harness for open circuit and poor
connection.
● Inspect the fuel pump or fuel
NO
pump relay. (Refer to page 5-4)
" (ON) position.
Battery voltage
( � YG - �
Ground )
connection.
)
"
FI SYSTEM DIAGNOSIS 4-30
�
ECU Coupler