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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 (
Ω
×
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 (
Ω
×
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
Ω
at 20 °C (68 °F)
• Is the fuel pump OK?
YES
NO
Replace the fuel
pump.
7. Wiring
• Check the entire fuel pump system’s wir-
ing.
Refer to “CIRCUIT DIAGRAM”.
• Is the fuel system’s wiring properly con-
nected and without defects?
YES
NO
Replace the ECU. Properly connect or
repair the fuel sys-
tem’s wiring.