FUEL SYSTEM ON-VEHICLE INSPECTION

CHECK FOR FUEL PUMP OPERATION AND FUEL LEAKS

1. Check fuel pump operation.

   
   

   1. Connect the intelligent tester to the DLC3.

   2. Turn the ignition switch on (IG) and turn the intelligent tester main switch on.

      Note:

      Do not start the engine.

   3. Select the following menu items: DIAGNOSIS / ENHANCED OBD II / ACTIVE TEST / FUEL PUMP / SPD.

   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. Check 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 intelligent tester from the DLC3.

CHECK FUEL PRESSURE

1. Discharge the fuel system pressure (Click here).

2. Using a voltmeter, measure the battery voltage.

   Standard voltage
   11 to 14 V

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

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

5. 

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

   Table 1. Text in Illustration

   *1	SST (Hose Band)
   *2	SST (T-joint)
   *3	SST (Gauge)
   *4	SST (Hose Joint)
   *5	SST (Hose)
   *6	SST (Fuel Tube Connector)
   *7	Fuel Tube Sub-assembly (Vehicle Side)
   *8	Fuel Pipe (Vehicle Side)

   09268-45101

   09268-41250

   09268-41260

   09268-41280

   09268-41500

   09268-41700

   95336-08070

6. Wipe up any spilled gasoline.

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

8. Connect the intelligent tester to the DLC3.

9. Select the following menu items: DIAGNOSIS / ENHANCED OBD II / ACTIVE TEST / FUEL PUMP / SPD.

10. Measure the fuel pressure.

    Fuel pressure
    380 to 420 kPa (3.9 to 4.3 kgf*cm2, 55 to 61 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
    380 to 420 kPa (3.9 to 4.3 kgf*cm2, 55 to 61 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, pressure regulator and/or fuel injectors.

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

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

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

19. Check 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.