Engine Controls - System/component Tests - V6 & V8: Overview Toyota Camry XV20

Fuel Pump Resistance & Operation

1. On Avalon and Camry, remove rear seat and cover plate on floor panel for access to electrical connector at fuel pump.
2. On Land Cruiser & LX470, 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.
3. On Sienna, Tacoma, T100 and 4Runner, it may be necessary to lower fuel tank for access to electrical connector at fuel pump.
4. On all models, to test fuel pump resistance, use ohmmeter to check resistance between specified terminals on fuel pump electrical connector. (Scheme 239)-58. Replace fuel pump if resistance is not.20-3.00 ohms at 68°F (20°C). CAUTION: When testing fuel pump operation, DO NOT apply battery voltage to fuel pump for more than 10 seconds or fuel pump may be damaged. When testing fuel pump operation, keep fuel pump away from battery as far as possible.
5. To test fuel pump operation, apply battery voltage and ground to (+) and (-) terminals on electrical connector for fuel pump. (Scheme 239)-58. DO NOT apply battery voltage to fuel pump for more than 10 seconds. Keep fuel pump away from battery as far as possible. Replace fuel pump if fuel pump does not operate.

Scheme 239

Scheme 240

Scheme 241

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Scheme 244

Scheme 245

1. Remove "V" bank cover on top of engine for access to fuel injectors. see scheme 3-4.
2. Ensure ignition is off. Disconnect electrical connector at fuel injector. Using ohmmeter, check resistance between electric terminals on fuel injector. Replace fuel injector if resistance is not 13.8 ohms at 68°F (20°C).
3. To check fuel injector volume, remove fuel injector. See appropriate REMOVE/INSTALL/OVERHAUL article. Fuel injector is connected to fuel filter for checking fuel injector volume.
4. Remove fuel hose clamp from No. 1 fuel pipe at fuel filter. Perform STEP 1. (Scheme 245) Ensure area around No. 1 fuel pipe and fuel filter is clean. CAUTION: Use care when disconnecting No. 1 fuel pipe from fuel filter, as some residual fuel pressure may still exist in the fuel system.
5. Depress both sides of retainer and pull No. 1 fuel pipe with disconnect fitting from fuel filter. Perform STEP 2. (Scheme 245)
6. Purchase a No. 1 fuel pipe Part No. (23801-20040) from parts department. No. 1 fuel pipe is the fuel pipe that attaches to the top of the fuel filter. Remove fuel pipe connector from end of the NEW No. 1 fuel pipe. (Scheme 246)-64.
7. Install delivery hose from Fuel Injector Measuring Kit (SST 09268-41047) with fuel pipe connector on fuel filter. (Scheme 246)-64. 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 the delivery hose. (Scheme 246)-64.
8. Place fuel injector into a clean graduated container. Place vinyl tube on end of fuel injector to prevent fuel spillage.
9. Connect scan tool to data link connector No. 3. (Scheme 250)-71. Turn ignition on. Turn scan tool on. Select ACTIVE TEST MODE on scan tool. Using scan tool 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 FUEL PUMP RESISTANCE & OPERATION under «FUEL DELIVERY»(ref-95583-S11888205302001040200000) under FUEL SYSTEM.
10. Connect Fuel Injector Tester (09842-30070) to fuel injector for 15 seconds. (Scheme 257) 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-95583-S13733065552001040200000) table. NOTE: Ensure difference between fuel injector volume on all fuel injectors is within specification. See «FUEL INJECTOR VOLUME»(ref-95583-S13733065552001040200000) SPECIFICATIONS 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 specification. Disconnect negative battery cable. Remove test equipment. CAUTION: DO NOT reuse old retainer when installing No. 1 fuel pipe on fuel filter. Always use a NEW retainer.
12. 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.
13. Using NEW retainer, install No. 1 fuel pipe on fuel filter until "click" sound is head. DO NOT reuse the old retainer. Pull on No. 1 fuel pipe to ensure fuel pipe connector is properly locked on the fuel filter.
14. 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 using scan tool to energize fuel pump.

Scheme 246

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Scheme 249

Scheme 250

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Scheme 255

Scheme 256

Scheme 257

Scheme 258

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 electric 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 appropriate REMOVE/INSTALL/OVERHAUL article. Fuel injector is connected to fuel filter and fuel pressure regulator for checking fuel injector volume.
4. Ensure area around the fuel inlet hose and fuel filter is clean. (Scheme 258) CAUTION: Use care when disconnecting fuel inlet hose from fuel filter, as some residual fuel pressure may still exist in the fuel system.
5. Depress both sides of retainer and pull fuel inlet hose with disconnect fitting from fuel filter. (Scheme 258)
6. Purchase NEW fuel inlet hose Part No. (23271-50150) from parts department. Remove fuel pipe connector from end of the NEW fuel inlet hose. (Scheme 246)-64.
7. Install delivery hose from Fuel Injector Measuring Kit (SST 09268-41047) with fuel pipe connector on fuel filter. (Scheme 246)-64. Ensure delivery hose and fuel pipe connector are properly connected on fuel filter.
8. Remove fuel pressure regulator from fuel rail. See appropriate REMOVE/INSTALL/OVERHAUL article. Using NEW "O" ring, install Union (SST 09268-41091) from fuel injector measuring kit on fuel pressure regulator. (Scheme 246)-64. 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 pressure gauge set, connect fuel injector to the delivery hose. (Scheme 246)-64.
10. Place fuel injector into a clean graduated container. Place vinyl tube on end of fuel injector to prevent fuel spillage.
11. Connect scan tool to data link connector No. 3. (Scheme 250)-71. Turn ignition on. Turn scan tool on. Select ACTIVE TEST MODE on scan tool. Using scan tool 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 FUEL PUMP RESISTANCE & OPERATION under «FUEL DELIVERY»(ref-95583-S11888205302001040200000) under FUEL SYSTEM.
12. Connect Fuel Injector Tester (09842-30070) to fuel injector for 15 seconds. (Scheme 257) 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-95583-S13733065552001040200000) table. NOTE: Ensure difference between fuel injector volume on all fuel injectors is within specification. See «FUEL INJECTOR VOLUME»(ref-95583-S13733065552001040200000) SPECIFICATIONS 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 specification. Disconnect negative battery cable. Remove test equipment. CAUTION: DO NOT reuse old retainer when installing fuel inlet hose on fuel filter. Always use a NEW retainer.
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 head. 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 bolts to 66 INCH lbs. (7.5 N.m). Install negative battery cable. Check for fuel leaks by using scan tool to energize fuel pump.