Fuel Pump Resistance & Operation (4Runner)
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- 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.
- 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 Fig 1. 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.
- To test fuel pump operation, apply battery voltage and ground to (+) and (-) terminals on electrical connector for fuel pump. See Fig 1. 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 under FUEL SYSTEMS in REMOVAL & INSTALLATION - V6 & V8 article.