Fuel Delivery: SFI: Injector: Inspection

Fig 1: Identifying Injector Rail Components

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. Disconnect the fuel inlet hose (fuel tube connector) from the fuel filter.
   CAUTION:

   • Perform disconnecting operations of the fuel tube connector (quick type) after reading the precautions (See PRECAUTION  ).
   • Prevent the retained pressure in the fuel pipe line from splashing inside the engine compartment.
   Fig 2: Disconnecting Fuel Inlet Hose

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Purchase the new fuel main hose and take out the fuel tube connector from its hose.

   Part No. 23271-50150

   Fig 3: Identifying Fuel Tube Connector

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
3. Connect SST (hose) and fuel tube connector to the fuel filter outlet.

   SST 09268-41047

   CAUTION: Perform connecting operations of the fuel tube connector (quick type) after reading the precautions (See PRECAUTION  ).

   HINT:

   Use the vehicle's fuel filter.

   Fig 4: Connecting SST To Fuel Tube Connector

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
4. Remove the pressure regulator from the delivery pipe.
5. Install the O-ring to the fuel inlet of the pressure regulator.
6. Connect SST (hose) to the fuel inlet of the pressure regulator with SST (union) and the 2 bolts.

   SST 09268-41047 (09268-41091)

   Torque: 7.5 N.m (80 kgf.cm, 66 in.lbf) 

7. Connect the fuel return hose to the fuel outlet of the pressure regulator.
   Fig 5: Removing Pressure Regulator From Delivery Pipe

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
8. Install the O-ring to the injector.
9. Connect SST (adaptor and hose) to the injector, and hold the injector and union with SST (clamp).

   SST 09268-41047 (09268-41110, 09268-41300)

10. Put the injector into the graduated cylinder.
    CAUTION: Install a suitable vinyl hose onto the injector to prevent gasoline from splashing out.
    Fig 6: Connecting SST To Injector

    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
11. Connect the LEXUS hand-held or OBD II scan tool tester to the DLC3.
Fig 7: Connecting Lexus Hand-Held Or OBD II Scan Tool Tester To DLC3
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
12. Connect the battery negative (-) cable to the battery.
13. Turn the ignition switch ON, and press the LEXUS handheld tester or OBD II scan tool main switch ON.
    NOTE: Do not start the engine.
14. Select the ACTIVE TEST mode on the LEXUS hand-held tester or OBD II scan tool.
15. Please refer to the LEXUS hand-held tester or OBD II scan tool operator's manual for further details.
16. If you have no LEXUS hand-held tester or OBD II scan tool, connect the positive (+) and negative (-) leads from the battery to the fuel pump connector (See FUEL PUMP  ).
17. Connect SST (wire) to the injector and the battery for 15 seconds, and measure the injection volume with a graduated cylinder. Test each injector 2 or 3 times.

    SST 09842-30070

    Volume: 56 - 69 cm ³  (3.4 - 4.2 cu in.) per 15 seconds 

    Difference between each injector: 

    13 cm ³  (0.8 cu in.) or less 

If the injection volume is not as specified, replace the injector.

Fig 8: Measuring Injection Volume

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. In the condition above, disconnect the tester probes of SST (wire) from the battery and check the fuel leakage from the injector.

   SST 09842-30070

   Fuel drop: 1 drop or less per 12 minutes 

   Fig 9: Inspecting For Leakage

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Turn the ignition switch OFF.
3. Disconnect the negative (-) terminal cable from the battery.
4. Remove SST and fuel tube connector.

   SST 09268-41047, 09842-30070

5. Disconnect the LEXUS hand-held tester or OBD II scan tool from the DLC3.
6. Reconnect the fuel inlet pipe (fuel tube connector) to the fuel filter.