The following wiring diagram and electrical system circuit apply for Lexus IS300 2002 model year. This manual provides information on the electrical system and circuits installed on vehicles by dividing them into a circuit for each system. The manual is divided into sections as follows: Index and Introduction, How to Use the Manual, Troubleshooting, Abbreviations, Glossary of Terms and Symbols, Relay Locations, Electrical Wiring Routing, System Circuits, Ground Points, Power Source, Connector List, Part Number of Connectors, Overall Electrical Wiring Diagram. Find more infomation about Lexus Wiring Diagram and Electrical System Circuit.