Fuel Pump System Inspection - Honda 2003 NPS50 Ruckus Service Manual

NOTE:
LIGHTS/METERS/SWITCHES
•
F U EL PUMP
When the ECM detects a problem in the fuel
pump circuit while the engine is running, the
engine speed will gradually tower via the ignition
circuit until finally the ignition and engine will be
stopped. After about 1 minute, power to the main
relay is also stopped.
SYSTEM INSPECTION
1. Fuel Pump Operation Check
Open the fuel pump lid by releasing the hooks.
Turn the ignition switch to ON, check for a n
operating sound from the fuel pump for 5 sec­
onds.
Is the operating sound heard?
NO
YES
2. Fuel Pump Battery Voltage Inspection
Disconnect the fuel pump 2P connector.
Check for battery voltage between the Red/black
wire terminal of the wire harness side and
ground.
There should be battery voltage with the ignition
switch turned to ON.
Is there battery voltage?
NO
YES
3. Fuel Pump Circuit Inspection
Check the continuity i n the White/yellow wire
between the fuel pump and ECM.
Does the continuity exist?
NO
YES
1 9- 1 8
- GO TO STEP 2.
Inspect the discharge volume (page 1 6-
-
6).
- •
•
An open circuit in Red/black wire
between the fuel pump and main
relay.
Inspect the main relay (page 1 6-1 1 ).
GO TO STEP 3.
-
- GO TO STEP 4.
- Open circuit in the White/yellow wire
harness.
2 P CONNECTOR
LID