Yamaha YZF-R1PC Utility Trailer User Manual


 
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ELEC
FUEL PUMP SYSTEM
EAS00759 EAS00817
EAS00818
5. Starting circuit cut-off relay
Disconnect the starting circuit cut-off relay
coupler from the wire harness.
Connect the pocket tester (
×
1) and bat-
tery (12 V) to the starting circuit cut-off
relay coupler as shown.
Positive battery lead
red/black
1
Negative battery lead
blue/yellow
2
Positive tester probe
red
3
Negative tester probe
red/blue
4
Does the starting circuit cut-off relay have
continuity between red and red/blue?
YES
NO
Replace the starting
circuit cut-off relay.
6. Fuel pump resistance
Disconnect the fuel pump coupler from the
wire harness.
Connect the pocket tester (
×
1) to the
fuel pump coupler as shown.
Positive tester probe
red/blue
1
Negative tester probe
black
2
Measure the fuel pump resistance.
Fuel pump resistance
0.2 ~ 3.0
at 20 °C (68 °F)
Is the fuel pump OK?
YES
NO
Replace the fuel
pump.
7. Wiring
Check the entire fuel pump systems wir-
ing.
Refer to CIRCUIT DIAGRAM.
Is the fuel systems wiring properly con-
nected and without defects?
YES
NO
Replace the ECU. Properly connect or
repair the fuel sys-
tems wiring.