Fuel System - On-Vehicle Inspection

1. Check fuel pump operation and fuel leakage

2. Check fuel pressure

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1. When using the intelligent tester.
   

   1. Connect the intelligent tester to the DLC3.

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

      NOTICE:

      Do not start the engine.

   3. Select the Active Test mode on the intelligent tester.

      HINT:

      Refer to the intelligent tester operator's manual for further details.

2. Check that there is no fuel leakage anywhere in the fuel system after doing maintenance.

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

2. Using a voltmeter, measure the battery voltage.

   Standard voltage:

   12 to 14 V
   

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

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

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

6. Install SST (pressure gauge and fuel tube connector) as shown in the illustration.

   SST

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

7. Wipe off any split gasoline.

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

9. Connect the intelligent tester to the DLC3 (see step 1 in check fuel pump operation).

10. Measure the fuel pressure.

    Standard fuel pressure:

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

    If the pressure is high, replace the fuel pressure regulator.
    If the pressure is low, check the fuel hoses, fuel hose connections, fuel pump and fuel pressure regulator.
    

11. Disconnect the intelligent tester from the DLC3.

12. Start the engine.

13. Measure the fuel pressure while the engine idles.

    Standard fuel pressure:

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

    If the pressure is not as specified, check the vacuum sensing hose and the fuel pressure regulator.
    

14. Stop the engine.

15. 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 pressure is not as specified, check the fuel pump, pressure regulator and injectors.
    

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

17. Reconnect the fuel tube to the fuel main tube.

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

19. Check for fuel leakage (Step 1).