Yamaha VMX12 2001 Service Manual page 443

EAS00817
9. Fuel pump resistance
• Disconnect the fuel pump coupler from the
wire harness.
• Connect the pocket tester (Ω × 1) to the fuel
pump coupler as shown.
Positive tester probe → blue/black 1
Negative tester probe → black 2
• Measure the fuel pump resistance.
Fuel pump resistance
1 ~ 10 Ω at 20 °C
• Is the fuel pump OK?
YES
EAS00818
10.Wiring connections
• Check the entire fuel pump system's wiring.
Refer to "CIRCUIT DIAGRAM".
• Is the fuel system's wiring properly con-
nected and without defects?
YES
Replace the ignitor
unit.
NO
Replace the fuel
pump.
NO
Properly connect or
repair the fuel sys-
tem's wiring.
FUEL PUMP SYSTEM
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