Fuel Pump Inspection; Fuel Discharge Amount Inspection - Suzuki ltz 400 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-7)" and "DTC "C23" (P1651-
H/L): TO Sensor Circuit Malfunction in Section 1A
(Page 1A-52)".
If the 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 Removal and
Installation (Page 1G-13)".

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) Remove the fuel tank mounting bolts. Refer to "Fuel
Tank Removal and Installation (Page 1G-9)".
2) Lift up the fuel tank and place a rag under the fuel
feed hose (1) and disconnect fuel feed hose from the
fuel valve.
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3) Connect a proper fuel hose (2) to the fuel valve.
4) Place the measuring cylinder and insert the fuel
hose end into the measuring cylinder.
5) Disconnect the fuel pump lead wire coupler (3).
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 (+) O/G 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
84 ml (2.8/3.0 US/lmp oz) and more/10 sec.
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7) After finishing the fuel discharge inspection, reinstall
the removed parts.
NOTE
Connect the fuel feed hose to the fuel valve
until it locks securely (a click is heard).
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