Fuel System On-Vehicle Inspection


  1. CHECK FUEL PUMP OPERATION AND FOR FUEL LEAK

  2. CHECK FUEL PRESSURE

Fuel System -- On-Vehicle Inspection



1. CHECK FUEL PUMP OPERATION AND FOR FUEL LEAK

  1. Connect the intelligent tester to the DLC3.

  1. Turn the engine switch on (IG).

    NOTICE:
    Do not start the engine.

  1. Turn the intelligent tester on.

  1. Enter the following menus: Powertrain / Engine and ECT / Active Test / Activate the Fuel Pump Speed Control.

  1. Check the fuel pump operation.

    1. Check for pressure in the fuel inlet tube from the fuel line. Check that the sound of fuel flowing in the fuel tank can be heard.
      If there is no sound, check the integration relay, fuel pump, ECM and wiring connector.

  1. Inspect for fuel leaks (LandCruiser RM000000Q460CAX_02_0091.html).



2. CHECK FUEL PRESSURE

  1. Check the battery voltage (LandCruiser RM000001AR90C2X_01_0001.html).

  1. Discharge the fuel system pressure (LandCruiser RM0000028RU05JX.html).

  1. Disconnect the cable from the negative (-) battery terminal.

    NOTICE:
    1. After turning the engine switch off, waiting time may be required before disconnecting the cable from the battery terminal. Therefore, make sure to read the disconnecting the cable from the battery terminal notice before proceeding with work (LandCruiser RM000003YMD00TX.html).
    2. When disconnecting the cable, some systems need to be initialized after the cable is reconnected (LandCruiser RM000003YMF011X.html).


    Land Cruiser, Land Cruiser Prado. Grj150 Trj150,155 Kdj150,155 Lj150, Gdj150,155

  1. Disconnect the No. 1 fuel pipe sub-assembly (LandCruiser RM0000028RU05JX.html).



    Land Cruiser, Land Cruiser Prado. Grj150 Trj150,155 Kdj150,155 Lj150, Gdj150,155.1Gr-Fe Fuel.Fuel System.Fuel System On-Vehicle Inspection

  1. Install SST (pressure gauge) as shown in the illustration.

    SST
    09268-45101(09268-41250,09268-41260,09268-41280,09268-41500,09268-41700,95336-08070)
    Text in Illustration
    *1
    		SST (Hose)
    *2
    		SST (Hose Band)
    *3
    		SST (T Joint)
    *4
    		SST (Pressure Gauge)
    *5
    		SST (Hose Joint)
    *6
    		No. 1 Fuel Tube Sub-assembly
    *7
    		SST (Fuel Tube Connector)

  1. Wipe off any gasoline.

  1. Reconnect the cable to the negative (-) battery terminal.

    NOTICE:
    When disconnecting the cable, some systems need to be initialized after the cable is reconnected (LandCruiser RM000003YMF011X.html).

  1. Operate the fuel pump.

    1. Connect the intelligent tester to the DLC3.

    2. Turn the engine switch on (IG).

      NOTICE:
      Do not start the engine.

    3. Turn the intelligent tester on.

    4. Enter the following menus: Powertrain / Engine and ECT / Active Test / Activate the Fuel Pump Speed Control / ON.

  1. Measure the fuel pressure.

    Standard fuel pressure:
    321 to 327 kPa (3.27 to 3.33 kgf/cm2, 46.5 to 47.4 psi)
    If the pressure is higher than the specification, replace the fuel pressure regulator.
    If the pressure is below the specification, check the fuel hoses and connections, fuel pump, fuel filter and fuel pressure regulator.

  1. Start the engine.

  1. Measure the fuel pressure.

    Standard fuel pressure:
    321 to 327 kPa (3.27 to 3.33 kgf/cm2, 46.5 to 47.4 psi)
    If the pressure is not as specified, check the fuel pump, pressure regulator and/or injectors.

  1. Stop the engine.

  1. Check that the fuel pressure remains as specified for 5 minutes after the engine has stops.

    Standard fuel pressure:
    147 kPa (1.5 kgf/cm2, 21 psi) or higher
    If the pressure is not as specified, check the fuel pump, pressure regulator and/or injectors.

  1. Disconnect the cable from the negative (-) battery terminal and carefully remove SST and the fuel tube connector to prevent gasoline from spraying.

  1. Connect the No. 1 fuel pipe sub-assembly (LandCruiser RM0000028RU05JX.html).

  1. Inspect for fuel leaks (LandCruiser RM000000Q460CAX_02_0091.html).