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Fuel Injectors (Avalon & Camry Solara)

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  1. To check for fuel injector operation, remove "V" bank cover on top of engine for access to fuel injectors. See Figure and Figure . Using stethoscope, listen for clicking sound at each fuel injector or use your finger to feel for fuel injector operation at fuel injector with engine cranking or with engine running. If fuel injector operation does not exist, check for loose connection at electrical connector at fuel injector. If electrical connector at fuel injector is okay, go to next step.
  2. Ensure ignition is off. Disconnect electrical connector at fuel injector. Using ohmmeter, check resistance between electrical terminals on fuel injector. Replace fuel injector if resistance is not 13.4-14.2 ohms at 68°F (20°C). See FUEL RAILS & FUEL INJECTORS under FUEL SYSTEMS in REMOVAL, OVERHAUL & INSTALLATION - V6 & V8 article.
  3. If fuel injector operates and fuel injector resistance is within specification, go to next step. If fuel injector resistance is within specification but fuel injector does not operate, check wiring circuit to fuel injector. See WIRING DIAGRAMS article. If problem exists in fuel injector or wiring circuit and misfire exists, a Diagnostic Trouble Code (DTC) may be stored in Engine Control Module (ECM). See TESTING PROCEDURE under SELF-DIAGNOSTIC SYSTEM in appropriate SELF-DIAGNOSTICS article for retrieving of DTCs.
  4. To check fuel injector volume, remove fuel injector. See FUEL RAILS & FUEL INJECTORS under FUEL SYSTEMS in REMOVAL, OVERHAUL & INSTALLATION - V6 & V8 article. Fuel injector is connected to fuel filter for checking fuel injector volume.
  5. Remove fuel pipe clamp from No. 1 fuel pipe at fuel filter. Perform STEP 1 in illustration. See Fig 1. Ensure area around No. 1 fuel pipe and fuel filter is clean.
    6. CAUTION: Use care when disconnecting No. 1 fuel pipe from fuel filter, as some residual fuel pressure may still exist in the fuel system.
    Fig 1: Disconnecting Typical No. 1 Fuel Pipe From Fuel Filter (Avalon & Camry Solara)
    G98F01610Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  6. Depress both sides of retainer and pull No. 1 fuel pipe with disconnect fitting from fuel filter. Perform STEP 2 in illustration. See Fig 1.
  7. On Avalon, purchase No. 1 fuel pipe (part No. 23801-20070) from parts department. On Camry Solara, purchase No. 1 fuel pipe (part No. (23801-20041) from parts department. On all models, No. 1 fuel pipe is the fuel pipe that attaches to top of fuel filter. Remove fuel pipe connector from end of NEW No. 1 fuel pipe. See Fig 2.
    Fig 2: Identifying Fuel Pipe Connector (Avalon, Camry Solara & Sienna)
    G98D01609Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  8. Install delivery hose from Fuel Injector Measuring Kit (SST 09268-41047) with fuel pipe connector on fuel filter. See Fig 3. Ensure delivery hose and fuel pipe connector are properly connected on fuel filter. Check that grommet and "O" ring are installed on top of fuel injector. Using clamp and union from fuel injector measuring kit, connect fuel injector to delivery hose. See Fig 3.
    Fig 3: Connecting Typical Fuel Injector Test Equipment (Avalon & Camry Solara)
    G98I11476Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  9. Place vinyl tube on end of fuel injector to prevent fuel spillage. Place fuel injector into a clean graduated container.
  10. Connect Toyota hand-held tester to data link connector No. 3 at driver's side of instrument panel. See Figure and Figure . Turn ignition on and then turn hand-held tester on. Select ACTIVE TEST MODE on hand-held tester. Using hand-held tester manufacturer's instructions, activate fuel pump.
    NOTE: If hand-held tester is not available, fuel pump may also be operated to pressurize fuel system by applying battery voltage to electrical terminals on fuel pump. For operating of fuel pump, see appropriate FUEL PUMP RESISTANCE & OPERATION  procedure under FUEL DELIVERY under FUEL SYSTEMS.
  11. Connect Fuel Injector Tester (09842-30070) to fuel injector for 15 seconds. See Fig 4. Measure fuel injector volume. Test each fuel injector 2-3 times. Replace fuel injector if fuel injector volume is not within specification. See FUEL INJECTOR VOLUME SPECIFICATIONS  table. Ensure difference between fuel injector volume on all fuel injectors is within specification. See FUEL INJECTOR VOLUME SPECIFICATIONS  table.
    Fig 4: Connecting Fuel Injector Tester
    G95J33687Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  12. Disconnect fuel injector tester. Ensure fuel leakage from end of fuel injector does not exceed one drop within 12 minutes. Replace fuel injector if leakage exceeds one drop within 12 minutes. Disconnect negative battery cable. Remove test equipment.
  13. Apply light coat of engine oil on tip of pipe on fuel filter to allow for ease of disconnect fitting and No. 1 fuel pipe installation.
    14. CAUTION: DO NOT reuse old retainer when installing No. 1 fuel pipe on fuel filter. Always use a NEW retainer.
  14. Using NEW retainer, install No. 1 fuel pipe on fuel filter until "click" sound is head. DO NOT reuse old retainer. Pull on No. 1 fuel pipe to ensure fuel pipe connector is properly locked on fuel filter.
  15. Reinstall fuel pipe clamp until "click" sound is head. Pull upward on fuel pipe clamp to ensure clamp is securely locked on fuel filter. Install negative battery cable. Check for fuel leaks by operating the fuel pump by using hand-held tester or connecting battery voltage to fuel pump.
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