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Inspection Procedure

  1. CHECK FUEL PUMP (FUEL PUMP OPERATION) 
    1. Check the fuel pump operation (see ON-VEHICLE INSPECTION ).

    OK:  Go to step  12

    NG: Go to next step 

  2. PERFORM ACTIVE TEST USING TECHSTREAM (OPERATE CIRCUIT OPENING RELAY) 
    1. Connect the Techstream to the DLC3.
    2. Turn the engine switch on (IG) and turn the Techstream ON.
    3. Enter the following menus: Powertrain/Engine/Active Test/Activate the Fuel Pump Speed Control.
    4. Check the operation of the relay while operating it using the Techstream.

      OK: Operating noise can be heard from the relay. 

    OK:  Go to step  8

    NG: Go to next step 

  3. INSPECT ECM POWER SOURCE CIRCUIT 
    1. Check the ECM power source circuit (see ECM POWER SOURCE CIRCUIT  ).

    NG: REPAIR OR REPLACE POWER SOURCE CIRCUIT 

    OK: Go to next step 

  4. INSPECT FUSE (F/PMP FUSE) 
    1. Remove the F/PMP fuse from the engine room No. 2 relay block, junction block.
    2. Measure the resistance of the F/PMP fuse.

      Standard resistance: 

      Below 1 Ω 

    3. Reinstall the fuse.

    NG: CHECK FOR SHORT IN ALL HARNESSES AND CONNECTORS CONNECTED TO FUSE AND REPLACE FUSE 

    Fig 1: Identifying F/PMP Fuse
    G05751815Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    OK: Go to next step 

  5. INSPECT INTEGRATION RELAY (EFI NO. 2 RELAY) 
    1. Remove the integration relay from the engine room No. 2 junction block.
    2. Measure the resistance according to the value(s) in the table below.

      Standard resistance 

      TESTER CONNECTIONS SPECIFIED CONDITIONS CHART

      Tester Connection Condition Specified Condition
      2B-4 - 2C-1 When no battery voltage applied to terminals 2B-3 and 2B-2 10 kΩ or higher
      2B-4 - 2C-1 When battery voltage applied to terminals 2B-3 and 2B-2 Below 1 Ω
    3. Reinstall the relay.

    NG: REPLACE INTEGRATION RELAY 

    Fig 2: Inspecting Integration Relay (EFI No. 2 Relay)
    G05803755Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    OK: Go to next step 

  6. INSPECT INTEGRATION RELAY (C/OPN RELAY) 
    1. Remove the integration relay from the engine room No. 2 junction block.
    2. Measure the resistance according to the value(s) in the table below.

      Standard resistance 

      TESTER CONNECTIONS SPECIFIED CONDITIONS CHART

      Tester Connection Condition Specified Condition
      2B-6 - 2B-8 When no battery voltage applied to terminals 2B-6 and 2B-7 10 kΩ or higher
      2B-6 - 2B-8 When battery voltage applied to terminals 2B-6 and 2B-7 Below 1 Ω
    3. Reinstall the relay.

    NG: REPLACE INTEGRATION RELAY 

    Fig 3: Inspecting Integration Relay (C/OPN Relay)
    G05803755Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    OK: Go to next step 

  7. INSPECT ECM (FC VOLTAGE) 
    1. Turn the engine switch on (IG).
    2. Measure the voltage according to the value(s) in the table below.

      Standard voltage 

      TESTER CONNECTIONS SPECIFIED CONDITIONS CHART

      Tester Connection Switch Condition Specified Condition
      A6-5 (FC) - E86-1 (E1) Engine Switch on (IG) 11 to 14 V

    OK: REPLACE ECM  (See REMOVAL  )

    Fig 4: Inspecting ECM (FC Voltage)
    G05804012Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    NG: CHECK AND REPAIR HARNESS AND CONNECTOR (ECM - CIRCUIT OPENING RELAY) 

  8. INSPECT F/PMP RELAY 
    1. Remove the F/PMP relay from the engine room No. 2 relay block.
    2. Measure the resistance according to the value(s) in the table below.

      Standard resistance 

      TESTER CONNECTIONS SPECIFIED CONDITIONS CHART

      Tester Connection Condition Specified Condition
      3 - 4 When no battery voltage applied to terminals 1 and 2 Below 1 Ω
      3 - 4 When battery voltage applied to terminals 1 and 2 10 kΩ or higher
    3. Reinstall the relay.

    NG: REPLACE F/PMP RELAY 

    Fig 5: F/PMP Relay Circuit Diagram
    G05285125Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    OK: Go to next step 

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

        Standard resistance 

        TESTER CONNECTIONS SPECIFIED CONDITIONS CHART

        Tester Connection Condition Specified Condition
        4 - 5 20°C (68°F) 0.2 to 3.0 Ω
    2. Inspect fuel pump operation.
      1. Apply battery voltage to both terminals. Check that the pump operates.
        Fig 6: Identifying Fuel Pump Connector Terminals
        G05285303Courtesy 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 the voltage on and off on the battery side, not the fuel pump side.

    NG: REPLACE FUEL PUMP  (See COMPONENTS )

    OK: Go to next step 

  10. CHECK HARNESS AND CONNECTOR (FUEL PUMP - F/PMP RELAY) 
    1. Check the harness and the connectors between the fuel pump and the F/PMP relay.
      1. Disconnect the fuel pump connector.
      2. Remove the F/PMP relay from the engine room No. 2 relay block.
      3. Measure the resistance according to the value(s) in the table below.

        Standard resistance (Check for open) 

        TESTER CONNECTIONS SPECIFIED CONDITIONS CHART

        Tester Connection Condition Specified Condition
        Fuel pump (V11-4) - F/PMP relay (4) Always Below 1 Ω

        Standard resistance (Check for short) 

        TESTER CONNECTIONS SPECIFIED CONDITIONS CHART

        Tester Connection Condition Specified Condition
        Fuel pump (V11-4) or F/PMP (4) - Body ground Always 10 kΩ or higher
    2. Check the harness and the connectors 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 (Check for open) 

        TESTER CONNECTIONS SPECIFIED CONDITIONS CHART

        Tester Connection Condition Specified Condition
        Fuel pump (V11-5) - Body ground Always 10 kΩ or higher

    NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

    Fig 7: Checking Harness And Connector (Fuel Pump - F/PMP Relay)
    G05804015Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    OK: Go to next step 

  11. CHECK HARNESS AND CONNECTOR (INTEGRATION RELAY - F/PMP RELAY) 
    1. Remove the integration relay from the engine room No. 2 junction block.
    2. Remove the F/PMP relay from the engine room No. 2 junction block.
    3. Measure the resistance according to the value(s) in the table below.

      Standard resistance (Check for open) 

      TESTER CONNECTIONS SPECIFIED CONDITIONS CHART

      Tester Connection Condition Specified Condition
      Integration relay (2B-8) - F/PMP relay (1) Always Below 1 Ω
      Integration relay (2B-8) - F/PMP relay (3) Always Below 1 Ω

      Standard resistance (Check for short) 

      TESTER CONNECTIONS SPECIFIED CONDITIONS CHART

      Tester Connection Condition Specified Condition
      Circuit opening relay (2B-8) or F/PMP relay (1) - Body ground Always 10 kΩ or higher
      Circuit opening relay (2B-8) or F/PMP relay (3) - Body ground Always 10 kΩ or higher
    4. Reinstall the relays.

    NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

    Fig 8: Checking Harness And Connector (Integration Relay - F/PMP Relay)
    G05751813Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    OK: REPAIR OR REPLACE FUEL SYSTEM (PRESSURE REGULATOR, FUEL PIPE LINE AND FUEL FILTER) 

  12. INSPECT F/PMP RELAY 
    1. Remove the F/PMP relay from the engine room No. 2 relay block.
    2. Measure the resistance according to the value(s) in the table below.

      Standard resistance 

      TESTER CONNECTIONS SPECIFIED CONDITIONS CHART

      Tester Connection Condition Specified Condition
      3 - 4 When no battery voltage applied to terminals 1 and 2 Below 1 Ω
      3 - 4 When battery voltage applied to terminals 1 and 2 10 kΩ or higher
    3. Reinstall the relay.
      Fig 9: F/PMP Relay Circuit Diagram
      G05285125Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    NG: REPLACE F/PMP RELAY 

    OK: Go to next step 

  13. INSPECT FUEL PUMP RESISTOR 
    1. Disconnect the fuel pump resister connector.
    2. Measure the resistance according to the value(s) in the table below.

      Standard resistance 

      TESTER CONNECTIONS SPECIFIED CONDITIONS CHART

      Tester Connection Condition Specified Condition
      1 - 2 20°C (68°F) 0.30 to 0.34 Ω
    3. Reconnect the fuel pump resister connector.

    NG: REPLACE FUEL PUMP RESISTOR  (See COMPONENTS )

    Fig 10: Inspecting Fuel Pump Resistor
    G04962581Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    OK: Go to next step 

  14. CHECK HARNESS AND CONNECTOR (F/PMP RELAY - FUEL PUMP RESISTOR) 
    1. Check the harness and the connectors between the F7 PMP relay and the fuel pump resistor.
      1. Remove the F/PMP relay from the engine room No. 2 relay block.
      2. Disconnect the fuel pump resistor connector.
      3. Measure the resistance according to the value(s) in the table below.

        Standard resistance (Check for open) 

        TESTER CONNECTIONS SPECIFIED CONDITIONS CHART

        Tester Connection Condition Specified Condition
        F/PMP relay (4) - Fuel pump resistor (A25-2) Always Below 1 Ω
        F/PMP relay (3) - Fuel pump resistor (A25-1) Always Below 1 Ω

        Standard resistance (Check for short) 

        TESTER CONNECTIONS SPECIFIED CONDITIONS CHART

        Tester Connection Condition Specified Condition
        Fuel pump relay (4) or Fuel pump resistor (A25-2) - Body ground Always 10 kΩ or higher
        Fuel pump relay (3) or Fuel pump resistor (A25-1) - Body ground Always 10 kΩ or higher
      4. Reinstall the relay.
      5. Reconnect the fuel pump resister connector.

    OK: PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE 

    Fig 11: Checking Harness And Connector (F/PMP Relay - Fuel Pump Resistor)
    G05804019Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

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