The Toyota MR2 is a two-seat, mid-engined, rear wheel drive sports car produced by Toyota from 1984 until July 2007. It known as Toyota MR-S in Japan, the Toyota MR2 Spyder in the United States, and the Toyota MR2 Roadster in Europe.
The following wiring diagram has been prepared to provide information on the electrical system of the 1991 TOYOTA MR2. This manual provides information on the electrical circuits installed on vehicles by dividing them into each system circuit. The actual wiring of each system circuit is shown from the point where the power source is received from the battery as far as each ground point. (All circuit diagrams are shown with the switches in the OFF position.)
This wiring diagram manual is divided into sections as follows: Index, Introduction, How to Use the Manual, Troubleshooting, Abbreviations, Glossary of Terms and Symbols, Relay Locations (shows position of the Electronic Control Unit, Relays, Relay Block, etc.), Electrical Cable Routing (describes position of Parts Connectors, Splice points, Ground points, etc.), Power Source (describes power distribution from the power supply to various electrical load), System Circuits (electrical circuits of each system are shown from the power supply through ground points, wiring connections and their positions are shown and classified by code according to the connection method), Ground Points and Overall Wiring Diagram.
Find more information about Toyota MR2 Wiring Diagram and Electrical System here. (source: wikipedia.com and mr2.com)