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Home >> Toyota >> 2007 >> Corolla LE, Automatic >> Repair and Diagnosis >> Engine Performance >> Fuel Delivery >> Engine Fuel System (1ZZ-FE) >> Fuel System >> On-Vehicle Inspection

On-Vehicle Inspection

  1. CHECK FUEL PUMP OPERATION 
    1. Connect the intelligent tester to the DLC3.
    2. Turn the ignition switch to the ON position.
      NOTE:

      Do not start the engine.

    3. Turn the intelligent tester on.
    4. Select the following menu items: DIAGNOSIS / ENHANCED OBD II / ACTIVE TEST / FUEL PUMP/ SPD.
      5. Fig 1: Connecting Intelligent Tester To DLC3
      G05195916Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    5. Check the fuel operation while operating it with the intelligent tester.

      If the fuel pump does not operate, replace the fuel pump.

    6. If you have no intelligent tester, connect the positive (+) lead from the battery to terminal 5 of the connector, and the negative (-) lead to terminal 4.
      NOTE:
      • These tests must be done quickly (for less than 10 seconds) to prevent the coil from burning out.
      • Keep the fuel pump as far away from the battery as possible.
      • Always do the switching at the battery side.
      7. Fig 2: Identifying Fuel Connector Terminals
      G05193214Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    7. Check that there is pressure remaining in the fuel inlet pipe from the fuel line.

      HINT:

      If there is fuel pressure, you will hear the sound of fuel flow. If there is no fuel pressure, check these parts: Fusible link, Fuses, Main relay, Fuel pump, ECM and Wire harness.

    8. Turn the intelligent tester off.
    9. Turn the ignition switch to the LOCK position.
    10. Disconnect the intelligent tester from the DLC3.
  2. CHECK FUEL PRESSURE 
    1. Using a voltmeter, measure the battery voltage.

      Standard voltage: 

      11 to 14 V 

    2. Discharge fuel system pressure (see FUEL SYSTEM ).
    3. Disconnect the cable from the negative (-) battery terminal.
    4. Remove the fuel pipe clamp No. 1.
    5. Pinch the retainer of the fuel tube connector, then pull the fuel tube connector out of the pipe to disconnect the fuel tube.
      NOTE:
      • Check that there is no dirt or other foreign objects around the connector before disconnecting it. Clean the connector if necessary.
      • It is necessary to prevent mud or dirt from entering the connector. If mud or dirt gets in the connector, the O-rings may not seal properly.
      • Only disconnect the quick connector by hand.
      • Do not bend, kink or twist the nylon tubes.
      • Protect the connector by covering it with a plastic bag.
      • If the pipe and connector are stuck, carefully try wiggling or pushing and pulling on the connector to release it. Pull the connector off the pipe carefully.
      6. Fig 3: Removing Fuel Pipe Clamp No. 1
      G05193217Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    6. Install SST and the fuel tube connector into the vehicle.

      SST 09268-31011 (09268-41500,90467-13001, 95336-08070), 09268-45014 (09268-41200, 09268-41220, 09268-41250) 

      7. Fig 4: Installing SST And Fuel Tube Connector Into Vehicle
      G05193218Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    7. Wipe off any split gasoline.
    8. Connect the cable to the negative (-) battery terminal.

      Torque: 5.4 N*m (55 kgf*cm, 48 in.*lbf) 

    9. Connect the intelligent tester to the DLC3.
    10. Turn the ignition switch to the ON position.
    11. Turn the intelligent tester on.
    12. Select the following menu items: DIAGNOSIS / ENHANCED OBD II / ACTIVE TEST / FUEL PUMP/ SPD.
      13. Fig 5: Connecting Intelligent Tester To DLC3
      G05193219Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    13. If you have no intelligent tester, connect the positive (+) lead from the battery to terminal 5 of the connector, and the negative (-) lead to terminal 4.
      14. Fig 6: Identifying Fuel Pump Connector Terminals
      G05193214Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    14. Measure the fuel pressure.

      Standard: 

      304 to 343 kPa (3.1 to 3.5 kgf/cm 2  , 44 to 50 psi) 

      • If the fuel pressure is greater than the standard value, replace the fuel pump.
      • If the fuel pressure is less than the standard value, check the connection of the fuel hose and fuel pump.
    15. Disconnect the intelligent tester from the DLC3.
    16. Start the engine.
    17. Measure the fuel pressure when the engine idles.

      Standard: 

      304 to 343 kPa (3.1 to 3.5 kgf/cm 2  , 44 to 50 psi) 

    18. Stop the engine.
    19. After stopping the engine, check that the fuel pressure does not change for 5 minutes.

      Standard: 

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

      If the fuel pressure is not as specified, check the fuel pump or fuel injector.

    20. Connect the fuel tube.
      1. Align the fuel tube connector with the pipe, then push the fuel tube connector in until the retainer makes a "click" sound to connect the fuel tube to the pipe.
        NOTE:
        • Check that there are no scratches or foreign objects around the connected part of the fuel tube connector and pipe before performing this work.
        • After connecting the fuel tube, check that the fuel tube is securely connected by pulling the fuel tube connector.
      21. Fig 7: Connecting Fuel Tube
      G05193221Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    21. Install the fuel pipe clamp No. 1.
    22. Check for fuel leaks (see FUEL SYSTEM ).
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