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On-Vehicle Inspection

  1. CHECK FUEL PUMP OPERATION AND INSPECT FOR FUEL LEAK 
    1. Connect the Techstream to the DLC3.
      1. Turn the engine switch on (IG).
        NOTE:

        Do not start the engine.

      2. Push the Techstream main switch ON.
      3. Select the following menu items: Power train / Engine and ECT / Active Test / Control the Fuel Pump Speed.
    2. Check the fuel pump operation.
      1. Check for pressure in the fuel inlet tube from the fuel line. Check that sound of fuel flowing in the fuel tank can be heard.

        If no sound can be heard, check the integration relay, fuel pump, ECM and wiring connector.

    3. Inspect for fuel leaks.
      1. Check that there are no fuel leaks anywhere on the system after performing maintenance.

        If there is a fuel leak, repair or replace parts as necessary.

  2. CHECK FUEL PRESSURE 
    1. Check that the battery positive voltage is above 12 V.
    2. Discharge the fuel system pressure. Refer to PRECAUTION .
    3. Disconnect the cable from the negative (-) battery terminal.
    4. Pinch and pull the fuel pump main tube. (Direct injection side)
      1. Remove the fuel pipe clamp.
        Fig 1: Identifying Fuel Pipe Clamp
        GTY140015Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      2. Disconnect the fuel tube.
        Fig 2: Disconnecting Fuel Tube
        GTY145928Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
        WARNING:
        • Always read the precautions. Refer to PRECAUTION  before disconnecting the fuel tube connector (quick type A).
        • The fuel tube may spray fuel as a result of pressure that remains in the tube. Do not allow fuel to be sprayed in the engine compartment.
    5. Pinch and pull the fuel pump main tube. (Port injection side)
      1. Remove the fuel pipe clamp.
        Fig 3: Identifying Fuel Pipe Clamp
        GTY145732Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      2. Disconnect the fuel tube.
        Fig 4: Identifying Fuel Tube
        GTY135838Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
        WARNING:
        • Always read the precautions. Refer to PRECAUTION  before disconnecting the fuel tube connector (quick type A).
        • The fuel tube may spray fuel as a result of pressure that remains in the tube. Do not allow fuel to be sprayed in the engine compartment.
    6. Install SST (EFI fuel pressure gauge) as shown in the illustration.
      Fig 5: Installing SST EFI Fuel Pressure Gauge
      GTY347830Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      TEXT IN ILLUSTRATION

      *1 SST
      (Hose Band)
      *2 SST
      (T-joint)
      *3 SST
      (Gauge)
      *4 SST
      (Hose Joint)
      *5 SST
      (Hose)
      *6 SST
      (Fuel Tube Connector)
      *7 Fuel Tube Sub-assembly (Vehicle Side)
      *8 Fuel Pipe (Vehicle Side)
      • SST: 09268-45101 
        • 09268-41250
        • 09268-41260
        • 09268-41280
        • 09268-41500
        • 09268-41700
        • 95336-08070
    7. Wipe off any gasoline.
    8. Reconnect the cable to the negative (-) battery terminal.
    9. Operate the fuel pump.
      1. Connect the Techstream to the DLC3.
      2. Turn the engine switch on (IG).
        NOTE:

        Do not start the engine.

      3. Push the Techstream main switch ON.
      4. Select the following menu items: Power train / Engine and ECT / Active Test / Control the Fuel Pump Speed.
    10. Measure the fuel pressure.

      Fuel pressure

      196 to 588 kPa (2 to 6 kgf/cm2 , 28 to 85 psi)

      HINT: 

      • If the fuel pressure is higher than the specification, replace the fuel pump (built-in fuel tank).
      • If the pressure is lower than the specification, check the fuel hoses, connections, and fuel pump (built-in fuel tank).
    11. Start the engine.
    12. Measure the fuel pressure at idle.

      Fuel pressure

      196 to 588 kPa (2 to 6 kgf/cm2 , 28 to 85 psi)

      If the pressure is not as specified, check the fuel pump and injectors.

    13. Stop the engine.
    14. Check that the fuel pressure remains as specified for 5 minutes after the engine has stopped.

      Fuel pressure

      147 kPa (1.5 kgf/cm2 , 21 psi) or more

      If the pressure is not as specified, check the fuel pump or injectors.

    15. After checking the fuel pressure, disconnect the cable from the negative (-) battery terminal and carefully remove SST and the fuel tube connector to prevent fuel from spilling.
    16. Reconnect the fuel pump main tube. Refer to PRECAUTION .
    17. Inspect for fuel leaks.
  3. CHECK FUEL PRESSURE (for High Pressure) 
    1. Connect the Techstream to the DLC3.
      1. Turn the engine switch on (IG).
      2. Push the Techstream main switch ON.
    2. Start and warm up the engine.
    3. Run the engine at idle.
    4. Select the following menu items: Power train / Engine and ECT / Data List / Fuel Press.
    5. Check the high pressure side fuel pressure.

      Fuel pressure

      3.5 to 4.5 MPa (35.7 to 45.9 kgf/cm2 , 508 to 653 psi)

      If the pressure is not as specified, check the fuel pump, high pressure side fuel pump, fuel pressure sensor and wirings.

    6. Stop the engine.
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