2003 Toyota 4Runner electrical wiring diagrams, pin assignments, component locations, connector views, functional descriptions, electrical troubleshooting manual 2003 Toyota 4Runner
This wiring diagram manual has been prepared to provide information on the electrical system of the 2003 4 RUNNER.
Applicable models: UZN210, 215 Series GRN210, 215 Series
- INDEX Index of the contents of this manual.
- INTRODUCTION Brief explanation of each section.
- HOW TO USE THIS MANUAL Instructions on how to use this manual.
- TROUBLESHOOTING Describes the basic inspection procedures for electrical circuits.
- ABBREVIATIONS Defines the abbreviations used in this manual
- GLOSSARY OF TERMS AND SYMBOLS Defines the symbols and functions of major parts.
- RELAY LOCATIONS Shows position of the Electronic Control Unit, Relays, Relay Block, etc.
This section is closely related to the system circuit.
- ELECTRICAL WIRING ROUTING Describes position of Parts Connectors, Splice points, Ground points, etc. This section is closely related to the system circuit.
- INDEX Index of the system circuits.
- 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. (Refer to the section, ”How to use this manual”). The ”System Outline” and ”Service Hints” useful for troubleshooting are also contained in this section.
- GROUND POINT Shows ground positions of all parts described in this manual.
- POWER SOURCE (Current Flow Chart) Describes power distribution from the power supply to various electrical loads.
- CONNECTOR LIST Describes the form of the connectors for the parts appeared in this book. This section is closely related to the system circuit.
- PART NUMBER OF CONNECTORS Indicates the part number of the connectors used in this manual.
- OVERALL ELECTRICAL WIRING DIAGRAM Provides circuit diagrams showing the circuit connections.
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