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Home › Toyota › 2007 › Camry Solara SE, 2D Convertible › Repair and Diagnosis › Engine Performance › System › Engine Control System (3MZ-FE) › SFI System › Fuel Pump Control Circuit › Inspection Procedure

Inspection Procedure

  1. PERFORM ACTIVE TEST BY INTELLIGENT TESTER (OPERATE C/OPN RELAY) 
    1. Connect the intelligent tester to the DLC3.
    2. Turn ON the ignition switch, push the intelligent tester or the OBD II scan tool main switch ON.
    3. Enter the following menus DIAGNOSIS / ENHANCED OBD II / ACTIVE TEST / FUEL PUMP / SPD.
    4. Check the relay operation while operating it using the intelligent tester.

      Standard: Operating noise can be heard from the relay. 

    OK: Go to step  5

    NG: Go to Next Step 

  2. INSPECT C/OPN RELAY 
    1. Remove the C/OPN relay from the engine room J/B.
      Fig 1: Identifying C/OPN Relay Connector Terminals
      G04942983Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Measure the resistance of the C/OPN relay.

      Standard resistance 

      TESTER CONNECTION SPECIFIED CONDITION

      Tester Connection Specified Condition
      3 - 5 10 kΩ or higher
      3 - 5 Below 1 Ω (When battery voltage is applied to terminals 1 and 2)

    NG: REPLACE RELAY 

    OK: Go to Next Step 

  3. CHECK ECM (FC VOLTAGE) 
    1. Turn the ignition switch ON.
    2. Measure the voltage of the ECM connectors.
      Fig 2: Identifying E6 And E4 Connectors Terminals
      G05128700Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard voltage 

      TESTER CONNECTION SPECIFIED CONDITION

      Tester Connection Specified Condition
      FC (E4-10) - E1 (E6-1) 9 to 14 V

    OK: REPLACE ECM 

    NG: Go to Next Step 

  4. CHECK WIRE HARNESS (ECM - C/OPN RELAY, C/OPN RELAY - IGNITION) 
    Fig 3: Checking Wire Harness (ECM - C/Opn Relay, C/Opn Relay - Ignition)
    G05128701Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Check the wire harness between the ECM and C/OPN relay.
      1. Disconnect the ECM connector.
      2. Remove the C/OPN relay from the engine room J/B.
      3. Measure the resistance of the wire harness side connectors.

        Standard resistance 

        TESTER CONNECTION SPECIFIED CONDITION

        Terminal Connections Specified Condition
        FC (E4-10) - C/OPM relay (2) Below 1 Ω
        FC (E4-10) or C/OPM relay (2) - Body ground 10 kΩ or higher
    2. Check the wire harness between the C/OPN relay and ignition switch.
      1. Check the IG2 fuse.
        • Remove the IG2 fuse from the engine room J/B.
        • Check the resistance of the IG2 fuse.

          Standard resistance: Below 1 Ω 

        • Reinstall the IG2 fuse.
      2. Remove the C/OPN relay from the engine room J/B.
      3. Disconnect the ignition switch connector.
      4. Measure the resistance of the wire harness side connectors.

        Standard resistance 

        TESTER CONNECTION SPECIFIED CONDITION

        Terminal Connections Specified Condition
        J/B C/OPN relay terminal 1 -I15-6 Below 1 Ω
        J/B C/OPN relay terminal 1 or I15-6 -Body ground 10 kΩ or higher

    NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK: REPLACE ECM 

  5. INSPECT FUEL PUMP 
    1. Measure the resistance of the fuel pump.
      1. Measure the resistance between terminals 4 and 5.

        Standard resistance 

        TESTER CONNECTION SPECIFIED CONDITION

        Terminal Connections Condition Specified Condition
        4 - 5 20°C (68°F) 0.2 to 0.3 Ω
    2. Check operation of the fuel pump.
      1. Apply battery voltage to both terminals. Check that the pump operates.
        Fig 4: Identifying F8 Connector Terminals
        G05128702Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
        NOTE:
        • These tests must be done quickly (within 10 seconds) to prevent the coil from burning out.
        • Keep the fuel pump as far away from the battery as possible.
        • Always turn ON and OFF the voltage on the battery side, not the fuel pump side.

    NG: REPLACE FUEL PUMP 

    OK: Go to Next Step 

  6. CHECK WIRE HARNESS (C/OPN RELAY - FUEL PUMP, FUEL PUMP - BODY GROUND) 
    1. Check the wire harness between the C/OPN relay and fuel pump.
      1. Remove the C/OPN relay from the engine room J/B.
      2. Disconnect the fuel pump connector.
      3. Measure the resistance of the wire harness side connectors.

        Standard resistance 

        TESTER CONNECTION SPECIFIED CONDITION

        Tester Connection Specified Condition
        J/B C/OPN relay terminal 3 - F8-4 Below 1 Ω
        J/B C/OPN relay terminal 3 or F8-4 -Body ground 10 kΩ or higher
        Fig 5: Identifying C/OPN Relay And F8 Connectors Terminals
        G05128703Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Check the wire harness between the fuel pump and body ground.
      1. Disconnect the fuel pump connector.
      2. Measure the resistance of the wire harness side connector and body ground.
        Fig 6: Identifying F8 Connector Terminals
        G05128704Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

        Standard resistance 

        TESTER CONNECTION SPECIFIED CONDITION

        Tester Connection Specified Condition
        F8-5 (Fuel pump) - Body ground Below 1 Ω

    NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK: CHECK ECM 

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