Fuel Injector Operation
WARNING: This page is about a different car, the 1995 Lexus LS 400. However, it is still accessible from the selected car via links, so may be relevant.
Start engine. Using a stethoscope, listen for clicking from each injector (or feel injector for vibration). If clicking is not heard, check for loose connection at injector connector, or no voltage signal at injector connector.