Is300, LS430 & SC430
WARNING: This page is about a different car, the 2003 Lexus SC 430, 2003 Lexus LS 430, 2003 Lexus IS 300, 2003 Lexus GS 430, and 2003 Lexus GS 300. However, it is still accessible from the selected car via links, so may be relevant.
Locate fuel pump resistor, located under protective cover on driver's side strut tower. Disconnect fuel pump resistor Black 2-pin connector. Measure resistance between resistor terminals. If resistance is not .30-.35 ohm, replace resistor.