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Engine Controls - System & Component Testing - V6 & V8: Overview Toyota Tundra I

Testing & Diagnostics 15 illustrations ~4038 words

Fuel Pump Resistance & Operation (Avalon, Camry, Camry Solara, Highlander, Land Cruiser, Sienna, Tacoma & 4Runner)

  1. On Avalon, Camry and Camry Solara, remove rear seat cushion and cover plate on floor panel and remaining necessary covers for access to electrical connector for fuel pump for access to electrical connector at fuel pump.
  2. On Highlander, remove driver's side and passenger's side rear seats and cover plate on floor panel for access to electrical connector for fuel pump.
  3. On Land Cruiser, remove rear seat located above the fuel tank. Remove rear door scuff plates, step plates and rear seat lock covers so carpet may be folded backward for access to top of fuel tank. Remove cover plate on floor panel for access to electrical connector at fuel pump.
  4. On Sienna, manufacturer recommends removing fuel tank for access to fuel pump. On Tacoma, it may be necessary to lower fuel tank for access to electrical connector at fuel pump.
  5. On 4Runner, remove driver's side rear seat cushion and cover plate on floor panel for access to electrical connector for fuel pump.
  6. On all models, disconnect electrical connector for fuel pump. This is electrical connector for fuel pump and fuel gauge sending unit and is located on top of fuel tank, near fuel pump. To test fuel pump resistance, using ohmmeter, check resistance between specified terminals on fuel pump electrical connector. (Scheme 46)- (Scheme 51). Replace fuel pump if resistance is not.20-3.00 ohms at 68°F (20°C).
  7. To test fuel pump operation, apply battery voltage and ground to (+) and (-) terminals on electrical connector for fuel pump. (Scheme 46)- (Scheme 51). DO NOT apply battery voltage to fuel pump for more than 10 seconds. Replace fuel pump and/or lead wire (if equipped) if fuel pump does not operate.

Scheme 46

Scheme 46
Scheme 46

Scheme 47

Scheme 47
Scheme 47

Scheme 48

Scheme 48
Scheme 48

Scheme 49

Scheme 49
Scheme 49

Scheme 50

Scheme 50
Scheme 50

Scheme 51

Scheme 51
Scheme 51

Fuel Pump Resistance & Operation (Sequoia & Tundra)

  1. Manufacturer lists checking fuel pump resistance and operation with fuel pump removed from fuel tank and fuel pump mounting bracket. For removal of fuel pump from fuel tank and fuel pump mounting bracket, see FUEL PUMP under FUEL SYSTEMS in REMOVAL, OVERHAUL & INSTALLATION - V6 & V8 article.
  2. To test fuel pump resistance, using ohmmeter, check resistance between electrical terminals on fuel pump. (Scheme 52) Replace fuel pump if resistance is not.20-3.00 ohms at 68°F (20°C).
  3. To test fuel pump operation, reinstall lead wire on fuel pump. Apply battery voltage and ground to terminals on lead wire. (Scheme 52) DO NOT apply battery voltage to fuel pump for more than 10 seconds. Replace fuel pump and/or lead wire if fuel pump does not operate.

Scheme 52

Scheme 52: Fuel Injectors (Avalon, Camry & Camry Solara)
Scheme 52: Fuel Injectors (Avalon, Camry & Camry Solara)

Scheme 53

Scheme 53
Scheme 53

Scheme 54

Scheme 54
Scheme 54
  1. To check for injector operation, remove "V" bank cover on top of engine for access to fuel injectors. see scheme 5and see scheme 6. 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).
  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. (Scheme 53) Ensure area around No. 1 fuel pipe and fuel filter is clean.
  6. Depress both sides of retainer and pull No. 1 fuel pipe with disconnect fitting from fuel filter. Perform STEP 2 in illustration. (Scheme 53)
  7. On Avalon, purchase No. 1 fuel pipe Part No. (23801-20070) from parts department. On Camry and 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. (Scheme 54)
  8. Install delivery hose from Fuel Injector Measuring Kit (SST 09268-41047) with fuel pipe connector on fuel filter. (Scheme 55) 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. (Scheme 55)
  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. see scheme 14- see scheme 16. 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»(ref-63408-S21219744912001020500000) procedure under FUEL DELIVERY under FUEL SYSTEMS.
  11. Connect Fuel Injector Tester (09842-30070) to fuel injector for 15 seconds. (Scheme 56) 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»(ref-63408-S06306826632001020500000) table. Ensure difference between fuel injector volume on all fuel injectors is within specification. See «FUEL INJECTOR VOLUME SPECIFICATIONS»(ref-63408-S06306826632001020500000) table.
  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. 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.

Scheme 55

Scheme 55: Fuel Injectors (Highlander)
Scheme 55: Fuel Injectors (Highlander)
  1. To check for injector operation, remove "V" bank cover on top of engine for access to fuel injectors. see scheme 5 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).
  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 pipe fitting for checking fuel injector volume.
  5. Remove fuel pipe clamp from disconnect fitting at end of No. 1 fuel pipe. (Scheme 57) Ensure area around No. 1 fuel pipe and disconnect fitting is clean.
  6. Depress both tabs and pull No. 1 fuel pipe with disconnect fitting from fuel pipe fitting. (Scheme 57) Purchase No. 1 fuel pipe Part No. (23801-20120) from parts department. No. 1 fuel pipe is fuel pipe that attaches to fuel rail. Remove fuel pipe connector from end of NEW No. 1 fuel pipe. (Scheme 58)
  7. Install delivery hose from Fuel Injector Measuring Kit (SST 09268-41047) with fuel pipe connector on fuel pipe fitting. (Scheme 59) Ensure delivery hose and fuel pipe connector are properly connected on fuel pipe fitting. 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. (Scheme 59)
  8. Place vinyl tube on end of fuel injector to prevent fuel spillage. Place fuel injector into a clean graduated container.
  9. Connect Toyota hand-held tester to data link connector No. 3. see scheme 17 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»(ref-63408-S21219744912001020500000) procedure under FUEL DELIVERY under FUEL SYSTEMS.
  10. Connect Fuel Injector Tester (09842-30070) to fuel injector for 15 seconds. (Scheme 56) 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»(ref-63408-S06306826632001020500000) table. Ensure difference between fuel injector volume on all fuel injectors is within specification. See «FUEL INJECTOR VOLUME SPECIFICATIONS»(ref-63408-S06306826632001020500000) table.
  11. 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.
  12. Install No. 1 fuel pipe on fuel pipe fitting. Pull on No. 1 fuel pipe to ensure fuel pipe is properly locked on fuel pipe fitting. Reinstall fuel pipe clamp. 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.

Scheme 56

Scheme 56: Fuel Injectors (Land Cruiser)
Scheme 56: Fuel Injectors (Land Cruiser)

Scheme 57

Scheme 57
Scheme 57
  1. Remove intake manifold cover located on top of engine. Remove air intake hose with intake air connector located between throttle body and air cleaner assembly. Ensure ignition is off.
  2. 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).
  3. 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 and fuel pressure regulator for checking fuel injector volume.
  4. Ensure area around fuel filter and fuel inlet hose at end of fuel filter is clean. (Scheme 60)
  5. Depress both sides of retainer and pull fuel inlet hose with disconnect fitting from fuel filter. (Scheme 60)
  6. Purchase fuel inlet hose Part No. (23271-50150) from parts department. Remove fuel pipe connector from end of NEW fuel inlet hose. see scheme 110
  7. Install delivery hose from Fuel Injector Measuring Kit (SST 09268-41047) with fuel pipe connector on fuel filter. see scheme 110 Ensure delivery hose and fuel pipe connector are properly connected on fuel filter.
  8. Remove fuel pressure regulator from fuel rail. See FUEL PRESSURE REGULATOR under FUEL SYSTEMS in REMOVAL, OVERHAUL & INSTALLATION - V6 & V8 article. Using NEW "O" ring, install Union (SST 09268-41091) from fuel injector measuring kit on fuel pressure regulator. see scheme 110 Tighten bolts to 66 INCH lbs. (7.5 N.m). Connect delivery hose to union and fuel return hose to fuel pressure regulator.
  9. Check that "O" ring is installed on top of fuel injector. Using Adapter (SST 09268-41110) and Clamp (SST 09268-41300) from fuel injector measuring kit, connect fuel injector to delivery hose. see scheme 110
  10. Place vinyl tube on end of fuel injector to prevent fuel spillage. Place fuel injector into a clean graduated container.
  11. Connect Toyota hand-held tester to data link connector No. 3. see scheme 18 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»(ref-63408-S21219744912001020500000) procedure under FUEL DELIVERY under FUEL SYSTEMS.
  12. Connect Fuel Injector Tester (09842-30070) to fuel injector for 15 seconds. (Scheme 56) 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»(ref-63408-S06306826632001020500000) table. Ensure difference between fuel injector volume on all fuel injectors is within specification. See «FUEL INJECTOR VOLUME SPECIFICATIONS»(ref-63408-S06306826632001020500000) table.
  13. 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.
  14. Apply light coat of engine oil on tip of pipe on fuel filter to allow for ease of disconnect fitting and fuel inlet hose installation.
  15. Using NEW retainer, install fuel inlet hose on fuel filter until "click" sound is heard. DO NOT reuse the old retainer. Pull on fuel inlet hose to ensure fuel pipe connector is properly locked on the fuel filter.
  16. Using NEW "O" ring, install fuel pressure regulator. Tighten fuel pressure regulator bolts to 66 INCH lbs. (7.5 N.m). 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.

Scheme 58

Scheme 58: Fuel Injectors (Sequoia & Tundra 4.7L V8)
Scheme 58: Fuel Injectors (Sequoia & Tundra 4.7L V8)
  1. Remove throttle body cover and air intake hose with intake air connector located between throttle body and air cleaner assembly. Ensure ignition is off. Disconnect electrical connector at fuel injector.
  2. 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).
  3. 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 inlet pipe and fuel pressure regulator for checking fuel injector volume.
  4. Ensure area around fuel inlet pipe and fuel inlet hose is clean. Fuel inlet hose goes from fuel inlet pipe near the frame up to the fuel rail. Disconnect fuel inlet hose from fuel inlet pipe. Connect Adapter (SST 09268-52011) and delivery hose from Fuel Injector Measuring Kit (SST 09268-41047) to fuel inlet pipe. see scheme 111
  5. Remove fuel pressure regulator from fuel rail. See FUEL PRESSURE REGULATOR under FUEL SYSTEMS in REMOVAL, OVERHAUL & INSTALLATION - V6 & V8 article. Using NEW "O" ring, install Union (SST 09268-41091) on fuel pressure regulator. see scheme 111 Tighten bolts to 66 INCH lbs. (7.5 N.m). Connect delivery hose to union and fuel return hose on fuel pressure regulator.
  6. Check that "O" ring is installed on top of fuel injector. Using Adapter (SST 09268-41110) and Clamp (SST 09268-41300) from fuel injector measuring kit, connect fuel injector to the delivery hose. see scheme 111
  7. Place vinyl tube on end of fuel injector to prevent fuel spillage. Place fuel injector into a clean graduated container.
  8. Connect Toyota hand-held tester to data link connector No. 3. see scheme 19and see scheme 22. 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.
  9. Connect Fuel Injector Tester (09842-30070) to fuel injector for 15 seconds. (Scheme 56) 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»(ref-63408-S06306826632001020500000) table. Ensure difference between fuel injector volume on all fuel injectors is within specification. See «FUEL INJECTOR VOLUME SPECIFICATIONS»(ref-63408-S06306826632001020500000) table.
  10. 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.
  11. Using NEW "O" ring, install fuel pressure regulator. Tighten fuel pressure regulator bolts to 66 INCH lbs. (7.5 N.m). Install negative battery cable. Check for fuel leaks by using hand-held tester to operate the fuel pump.

Scheme 59

Scheme 59: Fuel Injectors (Sienna)
Scheme 59: Fuel Injectors (Sienna)
  1. To check for injector operation, remove "V" bank cover on top of engine for access to fuel injectors. see scheme 5 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).
  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 pipe fitting for checking fuel injector volume.
  5. Remove fuel pipe clamp from No. 1 fuel pipe. see scheme 112 Ensure area around No. 1 fuel pipe and disconnect fitting is clean.
  6. Depress both sides of retainer and pull No. 1 fuel pipe with disconnect fitting from fuel pipe fitting. see scheme 112
  7. Purchase No. 1 fuel pipe Part No. (23801-20070) from parts department. No. 1 fuel pipe is the fuel pipe that fits between fuel rail and fuel pipe fitting. Remove fuel pipe connector from end of NEW No. 1 fuel pipe. (Scheme 54)
  8. Install delivery hose from Fuel Injector Measuring Kit (SST 09268-41047) with fuel pipe connector on retainer and fuel pipe fitting. see scheme 113 Ensure delivery hose and fuel pipe connector are properly connected on fuel pipe fitting. 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 scheme 113
  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. see scheme 20 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: 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»(ref-63408-S21219744912001020500000) under FUEL DELIVERY under FUEL SYSTEMS.
  11. Connect Fuel Injector Tester (09842-30070) to fuel injector for 15 seconds. (Scheme 56) 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»(ref-63408-S06306826632001020500000) table. Ensure difference between fuel injector volume on all fuel injectors is within specification. See «FUEL INJECTOR VOLUME SPECIFICATIONS»(ref-63408-S06306826632001020500000) table.
  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 fuel pipe fitting to allow for ease of disconnect fitting and No. 1 fuel pipe installation. Using NEW retainer, install No. 1 fuel pipe on fuel pipe fitting until "click" sound is heard. DO NOT reuse old retainer. Pull on No. 1 fuel pipe to ensure fuel pipe is properly locked on fuel pipe fitting.
  14. Reinstall fuel pipe clamp until "click" sound is heard. Pull upward on fuel pipe clamp to ensure fuel pipe clamp is securely locked on fuel pipe fitting. 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.

Scheme 60

Scheme 60: Fuel Injectors (Tacoma, Tundra 3.4L V6 & 4Runner)
Scheme 60: Fuel Injectors (Tacoma, Tundra 3.4L V6 & 4Runner)
  1. Remove necessary components for access to fuel injectors. Ensure ignition is off. Disconnect electrical connector at fuel injector.
  2. Using ohmmeter, check resistance between electrical terminals on fuel injector. On Tacoma and 4Runner, replace fuel injector if resistance is not 13.8 ohms at 68°F (20°C). On Tundra, replace fuel injector if resistance is not 13.4-14.2 ohms at 68°F (20°C).
  3. On all models, 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 inlet pipe and fuel pressure regulator for checking fuel injector volume.
  4. Ensure area around fuel inlet pipe and fuel inlet hose is clean. Fuel inlet hose goes from fuel inlet pipe near the frame up to the fuel rail. Disconnect fuel inlet hose from fuel inlet pipe. Connect Adapter (SST 09268-52011) and delivery hose from Fuel Injector Measuring Kit (SST 09268-41047) to fuel inlet pipe. see scheme 114
  5. Remove fuel pressure regulator from fuel rail. See FUEL PRESSURE REGULATOR under FUEL SYSTEMS in REMOVAL, OVERHAUL & INSTALLATION - V6 & V8 article. Using NEW "O" ring, install Union (SST 09268-41091) on fuel pressure regulator. see scheme 114 Connect delivery hose to union and fuel return hose on fuel pressure regulator.
  6. Check that "O" ring is installed on top of fuel injector. Connect fuel injector to the delivery hose. see scheme 114 Place vinyl tube on end of fuel injector to prevent fuel spillage. Place fuel injector into a clean graduated container.
  7. Connect Toyota hand-held tester to data link connector No. 3. see scheme 21- see scheme 23. 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: On Tacoma and 4Runner, 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»(ref-63408-S21219744912001020500000) procedure under FUEL DELIVERY under FUEL SYSTEMS.
  8. On all models, connect Fuel Injector Tester (09842-30070) to fuel injector for 15 seconds. (Scheme 56) 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»(ref-63408-S06306826632001020500000) table. Ensure difference between fuel injector volume on all fuel injectors is within specification. See «FUEL INJECTOR VOLUME SPECIFICATIONS»(ref-63408-S06306826632001020500000) table.
  9. 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.
  10. Using NEW "O" ring, install fuel pressure regulator. Tighten fuel pressure regulator bolts to 71 INCH lbs. (8.0 N.m). 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.
ApplicationCc (Cu. In.)
Volume
Avalon, Camry, Camry Solara, Highlander & Sienna60-73 (3.7-4.5)
Land Cruiser, Sequoia, Tacoma & Tundra56-69 (3.4-4.2)
4Runner60-73 (3.7-4.5)
Maximum Difference Between Fuel Injectors
All Models13 (.8)

FUEL INJECTOR VOLUME SPECIFICATIONS

More articles — Engine Controls - System & Component Testing - V6 & V8