FUEL SYSTEM ON-VEHICLE INSPECTION

PROCEDURE


  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 power switch on (IG).

        Note

        Do not start the engine.

      3. Turn the intelligent tester on.

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

      5. 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 that there are no fuel leaks after performing maintenance anywhere on the fuel system. If there are fuel leaks, repair or replace parts as necessary.

    3. Turn the power switch off.

    4. Disconnect the intelligent tester from the DLC3.

  2. CHECK FUEL PRESSURE


    1. Discharge fuel system pressure Click here.

    2. Using a voltmeter, measure the auxiliary battery voltage according to the value(s) in the table below.

      Standard Voltage
      Tester Connection Condition Specified Condition
      Positive terminal - Negative terminal Power switch off 11 to 14 V

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

      Note

      When disconnecting the cable, some systems need to be initialized after the cable is reconnected Click here.

    4. Disconnect the fuel hose from the fuel main tube Click here.

    5. B001LSQE09
      Text in Illustration
      *1

      SST

      (Hose Band)
      *2

      SST

      (T-joint)
      *3

      SST

      (Pressure Gauge)
      *4

      SST

      (Hose)
      *5

      SST

      (Fuel Tube Connector)
      *6 Fuel Tube
      *7 Fuel Pipe

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

      SST
      09268-31014   ( 09268-41500, 09268-41700, 95336-08070 )
      09268-45014   ( 09268-41200, 09268-41220, 09268-41250 )

    6. Clean up any spilled gasoline.

    7. Connect the cable to the negative (-) auxiliary battery terminal.

      Note

      When disconnecting the cable, some systems need to be initialized after the cable is reconnected Click here.

    8. Connect the intelligent tester to the DLC3.

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

    10. Measure the fuel pressure.

      Standard fuel pressure
      304 to 343 kPa (3.1 to 3.5 kgf/cm2, 44 to 50 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. Put the engine in inspection mode Click here.

    13. Start the engine.

    14. Measure the fuel pressure at idle.

      Standard fuel pressure
      304 to 343 kPa (3.1 to 3.5 kgf/cm2, 44 to 50 psi)

    15. Stop the engine.

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

      Standard 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.

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

      Note

      When disconnecting the cable, some systems need to be initialized after the cable is reconnected Click here.

    18. Reconnect the fuel tube to the main fuel tube (fuel tube connector).

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

    20. Inspect for fuel leaks (Step 1).