Engine Mechanical
WARNING: This page is about a different car, the 1995 Lexus GS 300. However, it is still accessible from the selected car via links, so may be relevant.
WARNING:
Air bag system uses a back-up power supply. After turning ignition switch to LOCK position and disconnecting negative battery cable, wait at least 90 seconds before servicing vehicle.
Before performing any on-vehicle adjustments to fuel or ignition systems, ensure engine mechanical condition is okay.