1.CHECK OPERATING SOUND OF FUEL PUMP.
Make sure that the fuel pump operates for two seconds when turning the ignition switch to ON.
NOTE:
Fuel pump operation can be executed using the Subaru Select Monitor.
For procedure, refer to “Compulsory Valve Operation Check Mode”. 
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Does the fuel pump emit operating sound?
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Check the fuel injector circuit.
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2.CHECK GROUND CIRCUIT OF FUEL PUMP.
1) Turn the ignition switch to OFF.
2) Remove the fuel pump access hole lid.
3) Disconnect the connector from fuel pump.
4) Measure the resistance of harness between fuel pump connector and chassis ground.
Connector & terminal
(R58) No. 6 — Chassis ground:
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Is the resistance less than 5 Ω?
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Repair the harness and connector.
NOTE:
In this case, repair the following item:
• Open circuit in harness between fuel pump connector and chassis grounding terminal
• Poor contact of coupling connector
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3.CHECK POWER SUPPLY TO FUEL PUMP.
1) Turn the ignition switch to ON.
2) Measure the voltage between fuel pump connector and chassis ground.
Connector & terminal
(R58) No. 5 (+) — Chassis ground (−):
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Is the voltage 10 V or more?
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Replace the fuel pump.
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4.CHECK HARNESS BETWEEN FUEL PUMP CONNECTOR AND FUEL PUMP RELAY CONNECTOR.
1) Turn the ignition switch to OFF.
2) Remove the fuel pump relay.
3) Measure the resistance of harness between fuel pump connector and fuel pump relay connector.
Connector & terminal
(R58) No. 5 — (B220) No. 14:
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Is the resistance less than 1 Ω?
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Repair the harness and connector.
NOTE:
In this case, repair the following item:
• Open circuit in harness between fuel pump connector and fuel pump relay connector
• Poor contact of coupling connector
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5.CHECK HARNESS BETWEEN FUEL PUMP CONNECTOR AND FUEL PUMP RELAY CONNECTOR.
Measure the resistance of harness between fuel pump connector and fuel pump relay connector.
Connector & terminal
(R58) No. 5 — Chassis ground:
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Is the resistance 1 MΩ or more?
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Repair the short circuit to ground in harness between fuel pump connector and fuel pump relay connector.
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6.CHECK FUEL PUMP RELAY.
1) Connect the battery to fuel pump relay terminals No. 15 and No. 16.
2) Measure the resistance between terminals of fuel pump relay.
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Is the resistance less than 1 Ω?
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Replace the fuel pump relay.
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7.CHECK HARNESS BETWEEN ECM CONNECTOR AND FUEL PUMP RELAY CONNECTOR.
1) Disconnect the connectors from the ECM.
2) Measure the resistance of harness between ECM connector and fuel pump relay connector.
Connector & terminal
(B136) No. 12 — (B220) No. 16:
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Is the resistance less than 1 Ω?
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Repair the open circuit of harness between ECM connector and fuel pump relay connector.
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8.CHECK FOR POOR CONTACT.
Check for poor contact of the ECM connector.
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Is there poor contact in ECM connector?
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Repair the poor contact of the ECM connector.
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Check the fuel injector circuit.
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