Handbook 652 Body Electrical Diagnosis The Electrical Wiring Diagram The Toyota Electrical Wiring Diagram (EWD) is the roadmap to all the electrical components and wiring in Toyota vehicles. The EWD is not just a book of wiring diagrams, but an information resource for anything electrical on the vehicle. The EWD includes:
• Overall wiring diagram • Diagrams for every system circuit • Power source diagrams • Ground points • Junction block and relay locations • Location of components • Electrical wire routing • System operation and troubleshooting hints • Terms, symbols, abbreviations, and definitions • Information on “How to Use This Manual” NOTE For the most part, the printed EWD manual and the EWD on TIS contain the same information. When there are differences, they will be noted during this course. TIS, however, provides different ways to locate information in the EWD and also provides cross-referencing to all service literature on one platform.
Once you learn how to use these features, you will find the EWD on TIS an invaluable diagnostic tool. 50 Technical Training