Component Testing
WARNING: This page does not describe the selected car, but rather 9 other vehicles, including the 2003 Lexus SC 430, 2003 Lexus RX 300, 2003 Lexus LX 470, 2003 Lexus LS 430, and 2003 Lexus IS 300. However, it is still accessible from the selected car via links, so may be relevant.
Heat the suspected component with a hair dryer while checking for a malfunction to exist. DO NOT apply heat directly to the components in the Engine Control Module (ECM). DO NOT heat any component to more than 140°F (60°C).