Fuel Pump Inspection; Fuel Discharge Amount Inspection; Fuel Pump Relay Inspection - Suzuki SFV650 Service Manual

1G-6 Fuel System:

Fuel Pump Inspection

Turn the ignition switch ON and check that the fuel pump
operates for a few seconds.
If the fuel pump motor does not make operating sound,
inspect the fuel pump circuit connections or inspect the
fuel pump relay and TO sensor. Refer to "Fuel Pump
Relay Inspection (Page 1G-6)" and "TO Sensor
Inspection in Section 1C (Page 1C-5)".
If the fuel pump relay, TO sensor and fuel pump circuit
connections are OK, the fuel pump may be faulty,
replace the fuel pump with a new one. Refer to "Fuel
Pump Assembly Removal and Installation (Page 1G-
10)".

Fuel Discharge Amount Inspection

WARNING
!
• Keep away from fire or spark.
• Spilled gasoline should be wiped off
immediately.
• Work in a well-ventilated area.
Inspect the fuel discharge amount in the following
procedures:
1) Lift and support the fuel tank. Refer to "Fuel Tank
Removal and Installation (Page 1G-7)".
2) Place a clean rag under the fuel feed hose (1) and
disconnect the fuel feed hose (1) from the fuel pump.
3) Disconnect the fuel pump lead wire coupler (2).
1
4) Connect a proper fuel hose (3) to the fuel pump.
5) Place the measuring cylinder and insert the fuel
hose end into the measuring cylinder.
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B944H11706003
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I944H1170004-01
3
I944H1170005-01
6) Connect a proper lead wire into the fuel pump lead
wire coupler (fuel pump side) and apply 12 V to the
fuel pump (between (+) Y/R wire and (–) B/W wire)
for 10 seconds and measure the amount of fuel
discharged.
If the discharge amount is out of the specification,
the probable cause may be failure of the fuel pump
or clogged fuel filter.
NOTE
The battery must be in fully charged
condition.
Fuel discharge amount
166 ml (5.6/5.8 US/lmp oz) and more/10 seconds
7) After finishing the fuel discharge inspection, reinstall
the fuel tank. Refer to "Fuel Tank Removal and
Installation (Page 1G-7)".

Fuel Pump Relay Inspection

Inspect the fuel pump relay in the following procedures:
1) Remove the right rear frame cover. Refer to "Exterior
Parts Removal and Installation in Section 9D
(Page 9D-4)".
2) Disconnect the fuel pump relay coupler and remove
the fuel pump relay (1).
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1
I944H1170007-01