Engine Controls - System & Component Testing - V6 & V8: Overview Toyota 4Runner IV

Fuel Pump Resistance & Operation (Avalon & Camry Solara)

1. 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. 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 110) Replace fuel pump if resistance is not.20-3.00 ohms at 68°F (20°C). CAUTION: When applying battery voltage to fuel pump, DO NOT apply battery voltage for more than 10 seconds or fuel pump may be damaged. Keep battery as far away from fuel pump as possible. Always connect jumper wires to fuel pump first, and then to battery, when applying battery voltage to fuel pump.
3. To test fuel pump operation, apply battery voltage and ground to (+) and (-) terminals on electrical connector for fuel pump. (Scheme 110) 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. See «FUEL PUMP»(ref-151984-S08944363302003010900000) under FUEL SYSTEMS in REMOVAL & INSTALLATION - V6 & V8 article.

Scheme 110

Fuel Pump Resistance & Operation (Camry)

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»(ref-151984-S08944363302003010900000) under FUEL SYSTEMS in REMOVAL & INSTALLATION - V6 & V8 article.
2. To test fuel pump resistance, using ohmmeter, check resistance between electrical terminals on fuel pump. (Scheme 111) 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. Always connect jumper wires to fuel pump and then to the battery when applying battery voltage to fuel pump.
3. Apply battery voltage and ground to terminals for fuel pump. (Scheme 111) 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 111

Fuel Pump Resistance & Operation (Highlander)

1. Remove driver's side and passenger's side rear seats and cover plate on floor panel for access to electrical connector for fuel pump.
2. 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. See. Replace fuel pump if resistance is not.20-3.00 ohms at 68°F (20°C). CAUTION: When applying battery voltage to fuel pump, DO NOT apply battery voltage for more than 10 seconds or fuel pump may be damaged. Keep battery as far away from fuel pump as possible. Always connect jumper wires to fuel pump first, and then to battery, when applying battery voltage to fuel pump.
3. To test fuel pump operation, apply battery voltage and ground to (+) and (-) terminals on electrical connector for fuel pump. (Scheme 112) 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. See «FUEL PUMP»(ref-151984-S08944363302003010900000) under FUEL SYSTEMS in REMOVAL & INSTALLATION - V6 & V8 article.

Scheme 112

Fuel Pump Resistance & Operation (Land Cruiser)

1. 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.
2. 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 113) Replace fuel pump if resistance is not.20-3.00 ohms at 68°F (20°C). CAUTION: When applying battery voltage to fuel pump, DO NOT apply battery voltage for more than 10 seconds or fuel pump may be damaged. Keep battery as far away from fuel pump as possible. Always connect jumper wires to fuel pump first, and then to battery, when applying battery voltage to fuel pump.
3. To test fuel pump operation, apply battery voltage and ground to (+) and (-) terminals on electrical connector for fuel pump. (Scheme 113) 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. See «FUEL PUMP»(ref-133227-S34785065812002021900000) under FUEL SYSTEMS in REMOVAL & INSTALLATION - V6 & V8 article.

Scheme 113

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»(ref-151984-S08944363302003010900000) under FUEL SYSTEMS in REMOVAL & INSTALLATION - V6 & V8 article.
2. To test fuel pump resistance, using ohmmeter, check resistance between electrical terminals on fuel pump. (Scheme 114) Replace fuel pump if resistance is not.20-3.00 ohms at 68°F (20°C). CAUTION: When applying battery voltage to fuel pump, DO NOT apply battery voltage for more than 10 seconds or fuel pump may be damaged. Keep battery as far away from fuel pump as possible. Always connect jumper wires to fuel pump first, and then to battery, when applying battery voltage to fuel pump.
3. To test fuel pump operation, on Sequoia and Tundra, reinstall lead wire on fuel pump. On all models, apply battery voltage and ground to terminals for fuel pump. (Scheme 114) 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 114

Fuel Pump Resistance & Operation (Sienna)

1. Manufacturer recommends removing fuel tank for access to fuel pump.
2. 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 115) Replace fuel pump if resistance is not.20-3.00 ohms at 68°F (20°C). CAUTION: When applying battery voltage to fuel pump, DO NOT apply battery voltage for more than 10 seconds or fuel pump may be damaged. Keep battery as far away from fuel pump as possible. Always connect jumper wires to fuel pump first, and then to battery, when applying battery voltage to fuel pump.
3. To test fuel pump operation, apply battery voltage and ground to (+) and (-) terminals on electrical connector for fuel pump. (Scheme 115) 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. See «FUEL PUMP»(ref-133227-S34785065812002021900000) under FUEL SYSTEMS in REMOVAL & INSTALLATION - V6 & V8 article.

Scheme 115

Fuel Pump Resistance & Operation (Tacoma)

1. It may be necessary to lower fuel tank for access to electrical connector for fuel pump. On models with rear seats, it may be possible to access electrical connector for fuel pump by removing driver's side rear seat cushion and cover plate on floor panel.
2. 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 116) Replace fuel pump if resistance is not.20-3.00 ohms at 68°F (20°C). CAUTION: When applying battery voltage to fuel pump, DO NOT apply battery voltage for more than 10 seconds or fuel pump may be damaged. Keep battery as far away from fuel pump as possible. Always connect jumper wires to fuel pump first, and then to battery, when applying battery voltage to fuel pump.
3. To test fuel pump operation, apply battery voltage and ground to (+) and (-) terminals on electrical connector for fuel pump. (Scheme 116) 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. See «FUEL PUMP»(ref-133227-S34785065812002021900000) under FUEL SYSTEMS in REMOVAL & INSTALLATION - V6 & V8 article.

Scheme 116

Fuel Pump Resistance & Operation (4Runner)

1. Remove rear seat located above the fuel tank. Remove carpet and 3 screws from center floor hole cover on floor panel for access to electrical connector for fuel pump. It may be necessary to lower fuel tank for access to fuel pump connector, as well.
2. 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 117) Replace fuel pump if resistance is not.20-3.00 ohms at 68°F (20°C). CAUTION: When applying battery voltage to fuel pump, DO NOT apply battery voltage for more than 10 seconds or fuel pump may be damaged. Keep battery as far away from fuel pump as possible. Always connect jumper wires to fuel pump first, and then to battery, when applying battery voltage to fuel pump.
3. To test fuel pump operation, apply battery voltage and ground to (+) and (-) terminals on electrical connector for fuel pump. (Scheme 117) 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. See «FUEL PUMP»(ref-133227-S34785065812002021900000) under FUEL SYSTEMS in REMOVAL & INSTALLATION - V6 & V8 article.

Scheme 117