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Inspection Procedure

  1. PERFORM ACTIVE TEST BY INTELLIGENT TESTER (OPERATE C/OPN RELAY) 
    1. Connect the intelligent tester to the DLC3.
    2. Turn the ignition switch to the ON position, and 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 R/B No. 1.
    2. Measure the resistance of the C/OPN relay.

      Standard resistance 

      TESTER CONNECTION SPECIFIED CONDITION CHART

      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)
    3. Reinstall the C/OPN relay.

    NG: REPLACE C/OPN RELAY 

    Fig 1: Inspecting C/OPN Relay
    G04942983Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    OK: Go to Next Step 

  3. CHECK ECM (FC VOLTAGE) 
    1. Turn the ignition switch to the ON position.
    2. Measure the voltage according to the value (s) in the table below.

      Standard voltage 

      TESTER CONNECTION SPECIFIED CONDITION CHART

      Tester Connection Specified Condition
      FC (E5-10) - E1 (E9-1) 9 to 14 V

    OK: REPLACE ECM 

    Fig 2: Identifying ECM Connector Terminal
    G05245782Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    NG: Go to Next Step 

  4. CHECK WIRE HARNESS (ECM - C/OPN RELAY, C/OPN RELAY - IGNITION SWITCH) 
    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 R/B No. 1.
      3. Measure the resistance according to the value (s) in the table below.

        Standard resistance 

        TESTER CONNECTION SPECIFIED CONDITION CHART

        Terminal Connections Specified Condition
        FC (E5-10) - C/OPN relay (2) Below 1 Ω
        FC (E5-10) or C/OPN relay (2) - Body ground 10 kΩ or higher
      4. Reinstall the C/OPN relay.
      5. Reconnect the ECM connector.
        Fig 3: Identifying ECM Connector Terminal And Ignition Switch Connector Terminal
        G05245783Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Check the wire harness between the C/OPN relay and ignition switch.
      1. Check the IGN fuse.
        • Remove the IGN fuse from the instrument panel J/B.
        • Check the resistance of the IGN fuse.

          Standard resistance: Below 1 Ω 

        • Reinstall the IGN fuse.
      2. Remove the C/OPN relay from the R/B No. 1.
      3. Disconnect the ignition switch connector.
      4. Measure the resistance according to the value (s) in the table below.

        Standard resistance 

        TESTER CONNECTION SPECIFIED CONDITION CHART

        Terminal Connections Specified Condition
        C/OPN relay terminal 1 - I15-6 Below 1 Ω
        C/OPN relay terminal 1 or I15-6 - Body ground 10 kΩ or higher
      5. Reconnect the ignition switch connector.
      6. Reinstall the C/OPN relay.

    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 CHART

        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 F12 Fuel Pump Connector Terminal
        G05245784Courtesy 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 on 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 R/B No. 1.
      2. Disconnect the fuel pump connector.
      3. Measure the resistance according to the value (s) in the table below..

        Standard resistance 

        TESTER CONNECTION SPECIFIED CONDITION CHART

        Tester Connection Specified Condition
        C/OPN relay terminal 3 - F12-4 Below 1 Ω
        C/OPN relay terminal 3 or F12-4 -Body ground 10 kΩ or higher
        Fig 5: Identifying F12 Fuel Pump Connector Terminal
        G05245785Courtesy 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 according to the value (s) in the table below.

        Standard resistance 

        TESTER CONNECTION SPECIFIED CONDITION CHART

        Tester Connection Specified Condition
        F12-5 (Fuel pump) - Body ground Below 1 Ω

    NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

    Fig 6: Identifying Fuel Pump Connector
    G05245786Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    OK: CHECK ECM 

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