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Home >> Toyota >> 2021 >> Highlander LE, 4WD >> Repair and Diagnosis >> Engine Mechanical >> Fuel System >> Fuel System (2GR-FKS) - Inspection >> Fuel System >> On-Vehicle Inspection [12/2019 - 10/2022] >> Procedure

On-Vehicle Inspection [12/2019 - 10/2022]: Procedure

  1. CHECK FUEL PUMP OPERATION AND INSPECT FOR FUEL LEAK 
    1. Check fuel pump operation.
      NOTE:

      Do not start the engine.

      Powertrain > Engine > Active Test 

      Tester Display
      Activate the Circuit Relay
      1. Check for pressure in the fuel tube sub-assembly from the fuel line. Check that sounds of fuel flowing from the fuel tank sub-assembly can be heard. If no sounds can be heard, check the relay, fuel pump, ECM and wiring connectors.
    2. Inspect for fuel leaks.
      1. Check that there are no fuel leaks from the fuel system after doing any maintenance or repairs. If there is a fuel leak, repair or replace parts as necessary.
  2. CHECK FUEL PRESSURE 
    1. Discharge fuel system pressure.

      Refer to PRECAUTION [12/2019 - 10/2022] 

    2. Measure the battery voltage.

      Standard Voltage

      11 to 14 V

    3. Disengage the 2 claws to remove the No. 2 fuel pipe clamp.
      GTY842723Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    4. Remove the No. 1 fuel pipe clamp from the fuel tube connector.
      GTY927182Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    5. Disconnect the No. 2 fuel tube sub-assembly (for Direct Injection).
      GTY887148Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      1. Disconnect the No. 2 fuel tube sub-assembly from the fuel pipe.

        Refer to PRECAUTION [12/2019 - 10/2022] 

    6. Disconnect the fuel tube sub-assembly (for Port Injection).
      GTY936954Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      1. Disconnect the fuel tube sub-assembly from the fuel pipe.

        Refer to PRECAUTION [12/2019 - 10/2022] 

    7. Install SST (EFI fuel pressure gauge) as shown in the illustration.
      GTY713748Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *1 Fuel Tube Sub-assembly (Vehicle Side)
      *a SST (Hose Band)
      *b SST (T Joint)
      *c SST (Gauge)
      *d SST (Hose Joint)
      *e SST (Hose)
      *f SST (Fuel Tube Connector)
      *g Fuel Pipe (Vehicle Side)
      • SST: 09268-45101 
        1. 09268-41250
        2. 09268-41260
        3. 09268-41280
        4. 09268-41500
        5. 09268-41700
        6. 95336-08070
    8. Wipe up any spilled fuel.
    9. Connect the cable to the negative (-) battery terminal.

      Refer to PROCEDURE - Step 2

      NOTE:

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

      Refer to INITIALIZATION [12/2019 - 09/2020] , or refer to INITIALIZATION [09/2020 - 10/2021] , or refer to INITIALIZATION [10/2021 - 10/2022]

    10. Measure the fuel pressure.
      NOTE:

      Do not start the engine.

      Powertrain > Engine > Active Test 

      Tester Display
      Activate the Circuit Relay

      Standard Fuel Pressure

      196 to 833 kPa (2.0 to 8.5 kgf/cm2 , 28 to 121 psi)

      • If the fuel pressure is more than the standard, replace the fuel main valve assembly.
      • If the fuel pressure is less than the standard, check the fuel hoses and their connections, fuel pump and fuel main valve assembly.
    11. Disconnect the GTS from the DLC3.
    12. Start the engine.
    13. Measure the fuel pressure at idle.

      Standard Fuel Pressure

      196 to 833 kPa (2.0 to 8.5 kgf/cm2 , 28 to 121 psi)

      HINT: 

      Refer to Standard Idle Speed.

      Refer to PROCEDURE - Step 10

    14. Stop the engine.
    15. Check that the fuel pressure remains as specified for 5 minutes.

      Standard Fuel Pressure

      98 kPa (1.0 kgf/cm2 , 14.2 psi) or more

      If the result is not as specified, check the fuel pump, fuel main valve assembly and/or port fuel injector assemblies.

    16. After checking the fuel pressure, disconnect the cable from the negative (-) battery terminal and carefully remove SST (EFI fuel pressure gauge) to prevent fuel from spraying.
      NOTE:

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

      Refer to INITIALIZATION [12/2019 - 09/2020] , or refer to INITIALIZATION [09/2020 - 10/2021] , or refer to INITIALIZATION [10/2021 - 10/2022]

    17. Connect the fuel tube sub-assembly (for Port Injection).
      1. Connect the fuel tube sub-assembly to the fuel pipe.

        Refer to PRECAUTION [12/2019 - 10/2022] 

    18. Connect the No. 2 fuel tube sub-assembly (for Direct Injection).
      1. Connect the No. 2 fuel tube sub-assembly to the fuel pipe.

        Refer to PRECAUTION [12/2019 - 10/2022] 

    19. Install the No. 1 fuel pipe clamp to the fuel tube connector.
    20. Align the protrusions of the No. 2 fuel pipe clamp with the notches of the No. 1 fuel pipe clamp, and engage the 2 claws to install the No. 2 fuel pipe clamp.
      GTY764941Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Protrusion
      *b Notch
    21. Connect the cable to the negative (-) battery terminal.

      Refer to PROCEDURE - Step 2

      NOTE:

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

      Refer to INITIALIZATION [12/2019 - 09/2020] , or refer to INITIALIZATION [09/2020 - 10/2021] , or refer to INITIALIZATION [10/2021 - 10/2022]

    22. Inspect for fuel leaks.

      See step  1

  3. CHECK FUEL PRESSURE (for High Pressure) 
    1. Start the engine and warm it up until the engine coolant temperature is 75°C (167°F) or higher with all the accessories switched off.

      Powertrain > Engine > Data List 

      Tester Display
      Coolant Temperature
    2. According to the display on the GTS, read the Data List.

      Powertrain > Engine > Data List 

      Tester Display
      Engine Speed
      Fuel Pressure (High)
      Injection Mode

      Standard

      GTS Display Condition Specified Condition
      Fuel Pressure (High)
      • Shift position: P
      • A/C: Off
      • Engine warmed up
      • Engine Speed: 3000 rpm
      • Injection Mode: Direct
      		 2400 to 20000 kPag

      If the result is not as specified, check the fuel pump (for Low Pressure), fuel pump assembly (for High Pressure), fuel pressure sensor (fuel delivery pipe with sensor assembly LH) (for High Pressure) and wire harnesses.

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