HYOSUNG AQUILA 250 FI, Service Manual, Page: 41 / 90

40
4-1-31 FI SYSTEM DIAGNOSIS
“C41” FUEL PUMP RELAY CIRCUIT MALFUNCTION
Is the Fuel pump relay OK?
DETECTED CONDITION POSSIBLE CAUSE
No voltage is applied to the both injectors for 3 sec.
after the contact of fuel pump relay is turned “ON”
position.
Or voltage is applied to the both injectors, when the
contact of fuel pump is “OFF” position.
● Fuel pump relay circuit open or short.
●
Fuel pump relay malfunction.
● ECU malfunction.
YES
NO
Replace the fuel pump relay with a
new one.
ECU Coupler
②
CODE
CODE
C41
CODE
CODE
[ 4 4 1 1 1 4 ]
� : Head lamp relay
� : Fuel pump relay
� : Main relay
� : Turn signal relay
▣ ▣
INSPECTION
◈
Step 1
1) Remove the frame cover.
2) Turn the ignition switch “OFF” position.
3) Check the fuel pump relay coupler for loose or
poor contacts.
If OK, then check the insulation and continuity.
Refer to page 4-2-6 for details.
● GW wire open or shorted to
ground, or poor
②
connection.
● If wire and connection are OK,
intermittent trouble or faulty ECU.
●
Recheck each terminal and wire
harness for open circuit and poor
connection.
● Inspect the fuel injectors.
(Refer to page 4-1-28)
�
� �
�
�
�
�