LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Toyota >> 2004 >> Land Cruiser >> Repair and Diagnosis >> Engine Performance >> Engine Control Systems >> SFI System >> Fuel Pump >> On-Vehicle Inspection
April 5, 2026: LEMON Manuals is launched! Read the announcement.

On-Vehicle Inspection

  1. CHECK FUEL PUMP OPERATION 
    1. Connect a TOYOTA hand-held tester or OBD II scan tool to the DLC3.
    2. Turn the ignition switch ON, and press the TOYOTA hand-held tester or OBD II scan tool main switch ON.
      NOTE: Do not start the engine.
    3. Select the ACTIVE TEST mode on the TOYOTA hand-held tester or OBD II scan tool.
    4. Please refer to the TOYOTA hand-held tester or OBD II scan tool operator's manual for further details.
    5. If you have no TOYOTA hand-held tester or OBD II scan tool, connect the positive (+) and negative (-) leads from the battery to the fuel pump connector. (See step  3)
    6. Disconnect the fuel return hose from the clamp on the V-bank cover.
    7. Remove the 2 bolts, nuts and V-bank cover.
    8. Check that the pulsation damper screw pop up when the fuel pump operates.

      If operation is not as specified, check following parts:

      • Fusible link
      • Fuses
      • EFI main relay
      • Fuel pump
      • ECM
      • Wiring connections
    9. Turn the ignition switch OFF.
    10. Disconnect the TOYOTA hand-held tester or OBD II scan tool from the DLC3.
      Fig 1: Connecting Toyota Hand-Held Tester To Dlc3
      G03076853Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      Fig 2: Checking Pulsation Damper Screw Pop Up
      G03076854Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  2. CHECK FUEL PRESSURE 
    1. Check the battery positive voltage is above 12 V.
    2. Disconnect the negative (-) terminal cable from the battery.
    3. Remove the front fuel pipe from the LH delivery pipe (See REMOVAL  ).
    4. Install the front fuel pipe and SST (pressure gauge) to the delivery pipe with the 3 lower gaskets and SST (adaptor).

      SST 09268-45014 (09268-41190, 90405-06167)

      Torque: 39 N.m (400 kgf.cm, 29 ft.lbf) 

    5. Wipe off any splattered gasoline.
    6. Reconnect the negative (-) terminal cable to the battery.
    7. Connect a TOYOTA hand-held tester or OBD II scan tool to the DLC3 (See (a) to (e) in step 1 on the check fuel pump operation).
    8. Measure the fuel pressure.
      Fig 3: Installing Front Fuel Pipe And SST (Pressure Gauge) To Delivery Pipe
      G03076855Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Fuel pressure: 

      265 - 304 kPa (2.7 - 3.1 kgf/cm 2  , 38 - 44 psi) 

      If pressure is higher than the specification, replace the fuel pressure regulator.

      If pressure is lower than the specification, check these parts:

      • Fuel hoses and connections
      • Fuel pump
      • Fuel filter
      • Fuel pressure regulator
    9. Disconnect the TOYOTA hand-held tester from the DLC3.
    10. Start the engine.
    11. Measure the fuel pressure at idle.

      Fuel pressure: 

      265 - 304 kPa (2.7 - 3.1 kgf/cm 2  , 38 - 44 psi) 

    12. Stop the engine.
    13. Check that the fuel pressure remains in the specification below for 5 minutes after the engine stop.

      Fuel pressure: 

      147 kPa (1.5 kgf/cm 2  , 21 psi) or more 

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

    14. After checking the fuel pressure, disconnect the negative (-) terminal cable from the battery and carefully remove the SST to prevent gasoline from splashing.

      SST 09268-45014

    15. Reinstall the front fuel pipe to the LH delivery pipe (See INSTALLATION  ).
    16. Reconnect the negative (-) terminal cable to the battery.
    17. Check for fuel leaks (See SFI SYSTEM  ).
    18. Reinstall the V-bank cover with the 2 bolts and nuts.
    19. Reconnect the fuel return hose to the clamp on the V-bank cover.
  3. INSPECT FUEL PUMP 
    1. Remove the No. 1 rear seats.
    2. Remove the 2 rear door scuff plates, the step plates and the rear seat lock covers.
    3. Pull off the front and rear floor carpets.
    4. Remove the 2 screws and the rear floor service hole cover.
    5. Disconnect the fuel pump & sender gauge connector.
    6. Using an ohmmeter, measure the resistance between terminal 4 and 5.
      Fig 4: Measuring Resistance Between Terminal 4 And 5 Using An Ohmmeter
      G03076856Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Resistance: 0.2 - 3.0 Ω at 20°C (68°F) 

      If the resistance is not as specified, replace the fuel pump and/or the lead wire.

    7. Inspect the fuel pump operation.

      Connect the battery positive (+) lead to terminal 4 of the connector, and the battery negative (-) lead to terminal 5. Check that the fuel pump operates.

      NOTE:
      • These tests must be done quickly (within 10 seconds) to prevent the coil burning out.
      • Keep the fuel pump as far away from the battery as possible.
      • Always change the connection on the battery side.

        If operation is not as specified, replace the fuel pump and/or lead wire.

    8. Reconnect the fuel pump & sender gauge connector.
    9. Reinstall the rear floor service hole cover with the 2 screws.
    10. Reinstall the front and rear floor carpets.
    11. Remove the 2 rear door scuff plates, the step plates and the rear sear lock covers.
    12. Reinstall the No. 1 rear seats.
      Fig 5: Connecting Battery Positive (+) Lead To Terminal 4 Of Connector
      G03076857Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
scientia non olet · About LEMON Manuals