SFI (3UZ-FE): Injector: Inspection

Fig 1: Inspecting Injector Injection (Set-up)

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. Disconnect the fuel inlet hose (rear fuel pipe) from the fuel main tube.
2. Temporarily install SST (union) to the fuel main tube.

   SST 09268-41047 (09268-52011)

3. Tighten the flare nut on the fuel main tube. (See SFI SYSTEM )
4. Connect SST (hose) to the SST (union).

   SST 09268-41047

   Fig 2: Disconnecting Fuel Inlet Hose From Fuel Main Tube

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

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

7. Put the injector into the graduated cylinder.
   CAUTION: Install a suitable vinyl hose onto the injector to prevent gasoline from splashing out.
   Fig 3: Installing O-Ring To Injector

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
8. Connect a LEXUS hand-held tester to the DLC3.
   Fig 4: Connecting LEXUS Hand Held Tester To DLC3

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
9. Connect the battery negative (-) cable to the battery.
10. Turn the ignition switch ON, and push the LEXUS handheld tester main switch ON.
    NOTE: Do not start the engine.
11. Select the active test mode on the LEXUS hand-held tester.
12. Refer to the LEXUS hand-held tester or OBDII scan tool operator's manual for further details.
13. If you have no LEXUS hand-held tester, connect the positive (+) and negative (-) leads from the battery to the fuel pump connector. (See FUEL PUMP )
14. Connect SST (wire) to the injector and battery for 15 seconds, and measure the injection volume with a graduated cylinder. Test each injector 2 or 3 times.

    SST 09842-30070

    Volume: 60 - 73 cm ³  (3.7 - 4.5 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 5: Measuring Injection Volume With Graduated Cylinder

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 6: Identifying Fuel Leakage From Injector

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

   SST 09268-41047, 09842-30070

5. Disconnect the LEXUS hand-held tester from the DLC3.
6. Reconnect the fuel inlet hose (rear fuel pipe) to the fuel main tube. (See SFI SYSTEM )