FUEL SYSTEM ON-VEHICLE INSPECTION


  1. CHECK FUEL PUMP OPERATION AND INSPECT FOR FUEL LEAK


    1. Check fuel pump operation.


      1. Connect the intelligent tester to the DLC3.

      2. Turn the ignition switch to ON and turn the intelligent tester main switch on.

        Note

        Do not start the engine.

      3. Enter the following menus: Powertrain / Engine and ECT / Active Test / Control the Fuel Pump /Speed.

      4. Check for pressure in the fuel inlet tube from the fuel line. Check that sounds of fuel flowing from the fuel tank can be heard. If no sounds can be heard, check the integration relay, fuel pump, ECM and wiring connectors.

    2. Inspect for fuel leaks.


      1. Check for fuel leaks from the fuel system after doing any maintenance or repairs. If there is a fuel leak, repair or replace parts if necessary.

    3. Turn the ignition switch off.

    4. Disconnect the intelligent tester from the DLC3.

  2. CHECK FUEL PRESSURE


    1. Discharge the fuel system pressure Click here.

    2. Measure the voltage according to the value(s) in the table below.

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      Positive (+) terminal - Negative (-) terminal Ignition switch off 11 to 14 V

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

    4. Remove the No. 1 fuel pipe clamp from the fuel tube connector.

    5. Disconnect the fuel hose from the fuel main tube.

    6. A0116WBE03
      Text in Illustration
      *1 SST (Clip)
      *2 SST (T-joint)
      *3 SST (Hose)
      *4 SST (Fuel Tube Connector)
      *5 SST (Pressure Gauge)
      *6 Fuel Tube

      Install SST (pressure gauge) using other SST as shown in the illustration.

      SST
      09268-31012   ( 09268-41500, 90467-13001, 95336-08070 )
      09268-45014   ( 09268-41200, 09268-41220, 09268-41250 )

    7. Clean up any spilled 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 (See step 1 in check fuel pump operation).

    10. Measure the fuel pressure.

      Fuel pressure
      304 to 343 kPa (3.1 to 3.5 kgf/cm2, 44.1 to 49.7 psi)

      • If the fuel pressure is greater than the standard value, replace the fuel pressure regulator.

      • If the fuel pressure is less than the standard value, check the fuel hoses and connections, fuel pump, fuel filter and fuel pressure regulator.

    11. Disconnect the intelligent tester from the DLC3.

    12. Start the engine.

    13. Measure the fuel pressure at idle.

      Fuel pressure
      304 to 343 kPa (3.1 to 3.5 kgf/cm2, 44.1 to 49.7 psi)

    14. Stop the engine.

    15. Check that the fuel pressure remains as specified for 5 minutes after the engine stops.

      Fuel pressure
      147 kPa (1.5 kgf/cm2, 21 psi) or more

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

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

    17. Connect the fuel tube to the main fuel tube.

    18. Install the No. 1 fuel pipe clamp to the fuel tube connector.

    19. Inspect for fuel leaks (Step 1).