LEMON Manuals: Even more car manuals for everyone
Home >> Toyota >> 2024 >> Corolla LE >> Repair and Diagnosis >> External Pages >> Different car >> Section 107 (Fuel System - Inspection) >> Fuel System >> On-Vehicle Inspection [09/2022 - ] >> Procedure

On-Vehicle Inspection [09/2022 - ]: Procedure

WARNING: This page is about a different car, the 2025 Toyota GR Corolla, 2024 Toyota GR Corolla, and 2023 Toyota GR Corolla. However, it is still accessible from the selected car via links, so may be relevant.
  1. CHECK FUEL PUMP OPERATION AND INSPECT FOR FUEL LEAK 
    1. Check fuel pump operation.
      1. Connect the Techstream to the DLC3.
      2. Turn the engine switch to ON.
        NOTE:

        Do not start the engine.

      3. Turn the Techstream on.
      4. Enter the following menus: Powertrain / Engine / Active Test / Activate the Circuit Relay.

        Powertrain > Engine > Active Test 

        Tester Display
        Activate the Circuit Relay
      5. 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.
    3. Turn the engine switch off.
    4. Disconnect the Techstream from the DLC3.
  2. CHECK FUEL PRESSURE 
    1. Discharge fuel system pressure.

      Refer to PRECAUTION [09/2022 - 11/2022] , or refer to PRECAUTION [11/2022 - ] 

    2. Measure the battery voltage.

      Standard Voltage

      11 to 14 V

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

      Refer to REMOVAL [09/2022 - 11/2022] , or refer to REMOVAL [11/2022 - 09/2024] , or refer to REMOVAL [09/2024 - ]

    4. Open the cover of the EFI fuel pipe clamp and remove the EFI fuel pipe clamp from the fuel tube connector.
      GTY996167Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      Open
      Pull
    5. Disconnect the fuel tube sub-assembly from the fuel pipe.

      Refer to PRECAUTION [09/2022 - 11/2022] , or refer to PRECAUTION [11/2022 - ] 

      GTY1107535Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    6. 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
    7. Wipe up any spilled fuel.
    8. Connect the cable to the negative (-) battery terminal.
    9. Connect the Techstream to the DLC3.
    10. Turn the engine switch to ON.
      NOTE:

      Do not start the engine.

    11. Turn the GTS on.
    12. Enter the following menus: Powertrain / Engine / Active Test / Activate the Circuit Relay.

      Powertrain > Engine > Active Test 

      Tester Display
      Activate the Circuit Relay (Brushless)
    13. Measure the fuel pressure.

      Standard Fuel Pressure

      280 to 664 kPa (2.9 to 6.8 kgf/cm 2 , 41 to 96 psi)

      • If the fuel pressure is less than the standard, check the fuel hoses and their connections, fuel pump, fuel filter and fuel main valve assembly.
      • If the result is not as specified, replace the fuel main valve assembly.
    14. Disconnect the Techstream from the DLC3.
    15. Start the engine.
    16. Measure the fuel pressure at idle.

      Standard Fuel Pressure

      280 to 664 kPa (2.9 to 6.8 kgf/cm 2 , 41 to 96 psi)

      HINT: 

      Refer to Standard Idle Speed.

      Refer to PROCEDURE - Step 5

    17. Stop the engine.
    18. Check that the fuel pressure remains as specified for 5 minutes.

      Standard Fuel Pressure

      98 kPa (1.0 kgf/cm 2 , 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.

    19. After checking the fuel pressure, disconnect the cable from the negative (-) battery terminal and carefully remove SST to prevent fuel from spraying.
    20. Connect the fuel tube sub-assembly to the fuel pipe.

      Refer to PRECAUTION [09/2022 - 11/2022] , or refer to PRECAUTION [11/2022 - ] 

    21. Install the No. 1 fuel pipe clamp to the fuel tube connector and close the cover of the No. 1 fuel pipe clamp.
    22. Inspect for fuel leaks.

      See step  1

  3. CHECK FUEL PRESSURE (for High Pressure) 
    1. Connect the Techstream to the DLC3.
    2. Turn the engine switch to ON.
    3. Turn the Techstream on.
    4. Enter the following menus: Powertrain / Engine / Data List / Engine Speed, Coolant Temperature, Fuel Pressure (High) and Injection Mode.

      Powertrain > Engine > Data List 

      Tester Display
      Engine Speed
      Coolant Temperature
      Fuel Pressure (High)
      Injection Mode
    5. 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.
    6. According to the display on the Techstream, read the Data List.

      Standard

      Techstream Display Condition Specified Condition
      Fuel Pressure (High)
      • Shift position: P or neutral
      • A/C: Off
      • Engine warmed up
      • Engine Speed: 3000 RPM
      • Injection Mode: Direct
      		 4000 to 26000 kPag

      If the result is not as specified, check the fuel pump, fuel pump assembly, fuel pressure sensor and wire harnesses.

    7. Stop the engine.
scientia non olet · About LEMON Manuals