LEMON Manuals: Even more car manuals for everyone
Home >> Toyota >> 2013 >> 4Runner Limited, AWD >> Repair and Diagnosis >> Engine Performance >> Fuel Delivery >> Fuel System (Inspection) >> Fuel System >> On-Vehicle Inspection >> On-Vehicle Inspection

On-Vehicle Inspection

  1. CHECK FUEL PUMP OPERATION AND FOR FUEL LEAK 
    1. Connect the Techstream to the DLC3.
    2. Turn the ignition switch to ON.
      NOTE:

      Do not start the engine.

    3. Turn the Techstream on.
    4. Enter the following menus: Powertrain / Engine and ECT / Active Test / Activate the Fuel Pump Speed Control.
    5. 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.

    6. Inspect for fuel leaks. Refer to INSTALLATION - Step 7 .
  2. CHECK FUEL PRESSURE 
    1. Check the battery voltage. Refer to ON-VEHICLE INSPECTION - Step 1 .
    2. Discharge the fuel system pressure. Refer to PRECAUTION .
    3. Disconnect the cable from the negative (-) battery terminal.
      NOTE:

      When disconnecting the cable, some systems need to be initialized after the cable is reconnected. Refer to INITIALIZATION .

    4. Disconnect the No. 1 fuel pipe sub-assembly. Refer to PRECAUTION .
      Fig 1: Identifying No. 1 Fuel Pipe Sub-Assembly
      GTY217276Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    5. Install SST (pressure gauge) as shown in the illustration.
      • SST: 09268-45101 
        1. 09268-41250
        2. 09268-41260
        3. 09268-41280
        4. 09268-41500
        5. 09268-41700
        6. 95336-08070
      Fig 2: Identifying SST Pressure Gauge
      GTY376332Courtesy 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
      *8 Fuel Pipe
    6. Wipe off any gasoline.
    7. Reconnect the cable to the negative (-) battery terminal.
      NOTE:

      When disconnecting the cable, some systems need to be initialized after the cable is reconnected. Refer to INITIALIZATION .

    8. Operate the fuel pump.
      1. Connect the Techstream to the DLC3.
      2. Turn the ignition switch to ON.
        NOTE:

        Do not start the engine.

      3. Turn the Techstream on.
      4. Enter the following menus: Powertrain / Engine and ECT / Active Test / Activate the Fuel Pump Speed Control / ON.
    9. 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.

    10. Start the engine.
    11. 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.

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

    14. Disconnect the cable from the negative (-) battery terminal and carefully remove SST and the fuel tube connector to prevent gasoline from spraying.
    15. Connect the No. 1 fuel pipe sub-assembly. Refer to PRECAUTION .
    16. Inspect for fuel leaks. Refer to INSTALLATION - Step 7 .
scientia non olet · About LEMON Manuals