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Home >> Toyota >> 2007 >> Sequoia Limited, RWD >> Repair and Diagnosis >> Engine Performance >> Fuel Delivery >> Engine Fuel System >> Fuel System >> On-Vehicle Inspection

On-Vehicle Inspection

  1. CHECK FUEL PUMP OPERATION AND FUEL LEAKS 
    1. Connect a intelligent tester to the Controller Area Network Vehicle Interface Module (CAN VIM). Then connect the CAN VIM to the Date Link Connector 3 (DLC3).
    2. Turn the ignition switch ON, and push the intelligent tester main switch ON.
      NOTE: Do not start the engine. 
      Fig 1: Connecting An Intelligent Tester To Controller Area Network Vehicle Interface Module (CAN VIM)
      G04507430Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    3. Enter the following menus: DIAGNOSIS / ENHANCED OBDII / ACTIVE TEST / FUEL PUMP / SPD
    4. Please refer to the intelligent tester operator's manual for further details.
    5. Check that the pulsation damper screw rises when the fuel pump operates.

      If operation is not as specified, check the fusible link, fuses, EFI main relay, fuel pump, ECM and wiring connections.

    6. Turn the ignition switch off.
    7. Disconnect the intelligent tester and CAN VIM from the DLC3.
      8. Fig 2: Checking That Pulsation Damper Screw Rises When Fuel Pump Operates
      G04507431Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  2. CHECK FUEL SYSTEM PRESSURE 
    1. Check the battery positive voltage is 12 V or more.
    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 intelligent tester to the DLC3. (See step  1 in check fuel pump operation (a) to (e))
    8. Measure the fuel pressure.

      Fuel pressure: 

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

      If pressure is high, replace the fuel pressure regulator.

      If pressure is low, check the fuel hoses and connections, fuel pump, fuel filter and fuel pressure regulator.

      Fig 3: Installing Front Fuel Pipe & SST (Pressure Gauge) To Delivery Pipe With 3 Lower Gaskets & SST (Adaptor)
      G04507432Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    9. Disconnect the intelligent tester and CAN VIM from the DLC3.
    10. Start the engine.
    11. Measure the fuel pressure at idle.

      Fuel pressure: 

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

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

      Fuel pressure: 

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

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

    14. After checking 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  )
  3. CONNECT CABLE TO NEGATIVE BATTERY TERMINAL 
  4. PERFORM INITIALIZATION 
    1. Perform initialization. (See INITIALIZATION )

      HINT:

      Some systems need initialization when disconnecting the cable from the negative battery terminal.

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