Fuel Pump Resistance & Operation
WARNING: This page is about a different car, the 2002 Lexus LX 470. However, it is still accessible from the selected car via links, so may be relevant.
- Remove rear seat located above 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.
- 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, use ohmmeter to check resistance between specified terminals on fuel pump electrical connector. See Fig 1. Replace fuel pump and/or lead wire if resistance is not .2-3.0 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.
- 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 if fuel pump does not operate.