FUEL SYSTEM ON-VEHICLE INSPECTION

PROCEDURE

  1. CHECK FUEL PUMP OPERATION AND INSPECT FOR FUEL LEAK

    1. Check fuel pump operation.

      1. Connect the GTS to the DLC3.

      2. Turn the ignition switch to ON.

        Note:

        Do not start the engine.

      3. Turn the GTS on.

      4. Enter the following menus: Powertrain / Engine / Active Test / Activate the Circuit Relay.

        Powertrain > Engine > Active Test

        Tester Display

        Activate the Circuit Relay

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

    2. Inspect for fuel leaks.

      1. Check that there are no fuel leaks from the fuel system after doing any maintenance or repairs. If there is a fuel leak, repair or replace parts as necessary.

    3. Turn the ignition switch off.

    4. Disconnect the GTS from the DLC3.

  2. CHECK FUEL PRESSURE

    1. Discharge fuel system pressure.

      Click here

    2. Measure the battery voltage.

      Standard Voltage

      11 to 14 V

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

      Note:

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

      Click here

    4. Remove the air cleaner cap with air cleaner hose.

      Click here

    5. A350949

      Disconnect the fuel tube sub-assembly.

      Click here

    6. A350929C03

      *1

      Fuel Tube Sub-assembly (Vehicle Side)

      *a

      SST (Hose Band)

      *b

      SST (T-joint)

      *c

      SST (Gauge)

      *d

      SST (Hose Joint)

      *e

      SST (Hose)

      *f

      SST (Fuel Tube Connector)

      *g

      Fuel Pipe (Vehicle Side)

      Install SST (EFI fuel pressure gauge) as shown in the illustration.

      09268-45101

      09268-41250

      09268-41260

      09268-41280

      09268-41500

      09268-41700

      95336-08070

    7. Wipe up any spilled fuel.

    8. Connect the cable to the negative (-) battery terminal.

      Note:

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

      Click here

    9. Connect the GTS to the DLC3.

    10. Turn the ignition switch to ON.

      Note:

      Do not start the engine.

    11. Turn the GTS on.

    12. Enter the following menus: Powertrain / Engine / Active Test / Activate the Circuit Relay.

      Powertrain > Engine > Active Test

      Tester Display

      Activate the Circuit Relay

    13. Measure the fuel pressure.

      Standard Fuel Pressure

      196 to 588 kPa (2.0 to 6.0 kgf/cm2, 28 to 85 psi)

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

      • If the result is not as specified, replace the fuel pressure regulator assembly.

    14. Disconnect the GTS from the DLC3.

    15. Start the engine.

    16. Measure the fuel pressure at idle.

      Standard Fuel Pressure

      196 to 588 kPa (2.0 to 6.0 kgf/cm2, 28 to 85 psi)

      Tip:

      Refer to Standard Idle Speed.

      Click here

    17. Stop the engine.

    18. Check that the fuel pressure remains as specified for 5 minutes.

      Standard Fuel Pressure

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

      If the result is not as specified, check the fuel pump, fuel pressure regulator assembly and/or fuel injector assemblies.

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

      Note:

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

      Click here

    20. Connect the fuel tube sub-assembly.

      Click here

    21. Install the air cleaner cap with air cleaner hose.

      Click here

    22. Inspect for fuel leaks.

      Click here

  3. CHECK FUEL PRESSURE (for High Pressure)

    1. Connect the GTS to the DLC3.

    2. Turn the ignition switch to ON.

    3. Turn the GTS on.

    4. Start and warm up the engine.

    5. Enter the following menus: Powertrain / Engine / Data List / High Fuel Pressure Sensor.

      Powertrain > Engine > Data List

      Tester Display

      High Fuel Pressure Sensor

    6. Check the high pressure side fuel pressure.

      Standard

      GTS Display

      Condition

      Specified Condition

      High Fuel Pressure Sensor

      Shift lever position: P or neutral

      A/C: Off

      Engine idling

      4 to 18 MPa

      Shift lever position: P or neutral

      A/C: Off

      Engine speed: 3000 rpm

      8 to 18 MPa

      If the result is not as specified, check the fuel pump, fuel pump assembly, fuel pressure sensor and wire harnesses.

    7. Stop the engine.