C41" Fuel Pump Relay Circuit Malfunction - HYOSUNG AQUILA 650 FI Service Manual

4-1-35 FISYSTEM DIAGNOSIS

"C41" FUEL PUMP RELAY CIRCUIT MALFUNCTION

DETECTED CONDITION
Voltage is applied continuous over 5 sec., battery
voltage � 5 V when fuel pump relay is "OFF" position
or battery voltage � 5 V when fuel pump relay is
"ON" position.
▣ ▣ 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 4-2-5 for details.
Is the Fuel pump relay OK?
● GW wire open or shorted to
ground, or poor
● If wire and connection are OK,
intermittent trouble or faulty ECU.
YES
● Recheck each terminal and wire
harness for open circuit and poor
connection.
● Inspect the fuel injectors. (Refer to
page 4-1-33)
Replace the fuel pump relay with a
NO
new one.
connection.
58
46
POSSIBLE CAUSE
● Fuel pump relay circuit open or short.
● Fuel pump relay malfunction.
● ECU malfunction.
58
ECU Coupler