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Fuel Injector Volume

  1. On ES300, remove fuel injector. See REMOVE/INSTALL/OVERHAUL article. Connect Fuel Tube Adapter (23801-20040) to fuel filter outlet side. Ensure fuel injector "O" ring is installed. Install Injection Measuring Tool Set (09268-41046). See Fig 1 or Fig 2. Install injector retainer clip. Attach a piece of vinyl tubing to bottom of fuel injector to prevent fuel splash. Put vinyl tubing into a graduated measuring cylinder. Go to step 4).
  2. On GS300, SC300 and GS400, remove fuel injector. See REMOVE/INSTALL/OVERHAUL article. Disconnect fuel inlet hose from main tube. Install Fuel Tube Adapter (09268-52011) to fuel main tube. Ensure fuel injector "O" ring is installed. Install Injection Measuring Tool Set (09268-41047). See Fig 1 or Fig 2. Install injector retainer clip. Attach a piece of vinyl tubing to bottom of fuel injector to prevent fuel splash. Put vinyl tubing into a graduated measuring cylinder. Go to step 4).
  3. On SC400, remove fuel injector. See REMOVE/INSTALL/OVERHAUL article. Disconnect fuel inlet hose from main tube. Install Fuel Tube Adapter (09631-22020) to fuel main tube. Ensure fuel injector "O" ring is installed. Install Injection Measuring Tool Set (09268-41047). See Fig 1 or Fig 2. Install injector retainer clip. Attach a piece of vinyl tubing to bottom of fuel injector to prevent fuel splash. Put vinyl tubing into a graduated measuring cylinder. Go to next step.
    Fig 1: Connecting Fuel Injection Measuring Tool Set (ES300)
    G97C06178Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    Fig 2: Connecting Fuel Injection Measuring Tool Set (Except ES300)
    G98I10775Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  4. If using a Lexus scan tool, connect scan tool to Data Link Connector (DLC) No. 3. See Figure. Turn ignition on. DO NOT  start engine. Turn scan tool on. Select ACTIVE TEST mode on scan tool. Using scan tool manufacturer's instructions, activate electric fuel pump, and go to next step. If Lexus scan tool is not available, manually activate fuel pump. See FUEL PUMP OPERATION (USING BATTERY VOLTAGE) under FUEL PUMP OPERATION , and go to next step.
  5. Turn ignition on, engine off. Connect EFI Inspection Wiring (09842-30070) between fuel injector and a 12-volt battery for 15 seconds. Compare measured volume with specified volume. See appropriate FUEL INJECTOR VOLUME (15 SECONDS) table below. Test each injector 2-3 times. Turn injector off and check for leakage. Replace injector if one or more of the following conditions exists:
    • Volume is not within specification.
    • Difference in volume between injectors exceeds specification.
    • On ES300 & LS400, more than one drop leaks from injector within one minute of disconnecting EFI inspection wiring from battery or turning injectors off using Lexus scan tool. On GS300, GS400, SC400, more than one drop leaks from injector within 12 minutes of disconnecting EFI inspection wiring from battery or turning injectors off using Lexus scan tool.
FUEL INJECTOR VOLUME (15 SECONDS) (ES300)

Application Cu. In. (cc)
Volume 3.7-4.5 (60-73)
Difference Between Injectors 0.8 (13)
FUEL INJECTOR VOLUME (15 SECONDS) (S300, GS400, SC300 & SC400)

Application Cu. In. (cc)
Volume 3.7-4.5 (60-73)
Difference Between Injectors 0.8 (13)
FUEL INJECTOR VOLUME (15 SECONDS) (LS400)

Application Cu. In. (cc)
Volume 3.7-4.5 (60-73)
Difference Between Injectors 0.6 (10)
FUEL INJECTOR VOLUME (15 SECONDS) (SC300)

Application Cu. In. (cc)
Volume 4.3-5.4 (70-88)
Difference Between Injectors 0.5 (8)
FUEL INJECTOR VOLUME (15 SECONDS) (SC400)

Application Cu. In. (cc)
Volume 3.7-4.5 (56-70)
Difference Between Injectors 0.6 (10)
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