2003 PRIUS (EWD493U) 2 AINTRODUCTION This manual consists of the following 13 sections: No.SectionDescription A INDEXIndex of the contents of this manual. A INTRODUCTIONBrief explanation of each section. BHOW TO USE THISMANUALInstructions on how to use this manual. CTROUBLE–SHOOTINGDescribes the basic inspection procedures for electrical circuits. DABBREVIATIONSDefines the abbreviations used in this manual. E GLOSSARY OF TERMS AND SYMBOLS Defines the symbols and functions of major parts. FRELAY LOCATIONSShows position of the Electronic Control Unit, Relays, Relay Block, etc.This section is closely related to the system circuit. GELECTRICALWIRING ROUTINGDescribes position of Parts Connectors, Splice points, Ground points, etc.This section is closely related to the system circuit. INDEXIndex of the system circuits. H 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. IGROUND POINTShows ground positions of all parts described in this manual. JPOWER SOURCE(Current Flow Chart)Describes power distribution from the power supply to various electrical loads. KCONNECTOR LISTDescribes the form of the connectors for the parts appeared in this book.This section is closely related to the system circuit. LPART NUMBER OFCONNECTORSIndicates the part number of the connectors used in this manual. M OVERALL ELECTRICAL WIRING DIAGRAM Provides circuit diagrams showing the circuit connections. :autoelectric 2003 PRIUS (EWD493U) 3 HOW TO USE THIS MANUALB This manual provides information on the electrical circuits installed on vehicles by dividing them into a circuit for each system. 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.) When troubleshooting any problem, first understand the operation of the circuit where the problem was detected (see System Circuit section), the power source supplying power to that circuit (see Power Source section), and the ground points (see Ground Point section). See the System Outline to understand the circuit operation. When the circuit operation is understood, begin troubleshooting of the problem circuit to isolate the cause. Use Relay Location and Electrical Wiring Routing sections to find each part, junction block and wiring harness connectors, wiring harness and wiring harness connectors, splice points, and ground points of each system circuit. Internal wiring for each junction block is also provided for better understanding of connection within a junction block. Wiring related to each system is indicated in each system circuit by arrows (from__, to__). When overall connections are required, see the Overall Electrical Wiring Diagram at the end of this manual. :autoelectric ,,,, ,,,, ,,,, ,,,, ,,,, ,,,, ,,,, @@@@ @@@@ @@@@ @@@@ @@@@ @@@@ @@@@ PPPP PPPP PPPP PPPP PPPP PPPP PPPP,,,, ,,,, ,,,, ,,,, ,,,, ,,,, ,,,,,,,,,,,,,,,,,,,,,,,, ,,,,,,,,,, ,,,,,,,,,, ,,,,,,,,,, ,,,,,,,,,, ,,,,,,,,,, ,,,,,,,,,, ,,,,,,,,,, W– R 7. 5AGAUGE 1 2 3 4 487 2111 13 4 1 2 3 4 1 2 B18 BL FROM POWER SOURCE SYSTEM (SEE PAGE 66) R–L R–L G W– B W– BW–B W– B W– B W– B Y–G R L 4 H17 R 6 DELAYCIRCUIT S 6 B18 3 4 R 7 BV11 G–W G–R G–R G–RG–R G–W G–W (W /G)(S/D) (S/D ) C 7 (SHIELDED) BV1 1 I 5 L L STOP LIGHT 15 7 TO ABS ECU BO 50 15ASTOP IB IB REAR LIGHTSWARNING LIGHT [COMB.METER] 3C 3C IE114 STOP LIGHT SW STO P L IGH T R H [RE ARCO MB .L IGH T R H] STO P L IGH T R H [RE ARCO MB .L IGH T L H] HIGH MOUNTEDSTOP LIGHT [A] [B] [I] [D] [F] [H] [E] [J] [M] [N] [K] [L] [G] [C] LIGHT FAILURE SENSOR 2003 PRIUS (EWD493U) 4 BHOW TO USE THIS MANUAL The system shown here is an EXAMPLE ONLY. It is different to the actual circuit shown in the SYSTEM CIRCUITS SECTION. :autoelectric 2003 PRIUS (EWD493U) 5 B [A]:System Title [B]:Indicates a Relay Block. No shading is used and only the Relay Block No. is shown to distinguish it from the J/B Example: Indicates Relay Block No.1 [C]:() is used to indicate different wiring and connector, etc. when the vehicle model, engine type, or specification is different. [D]:Indicates related system. [E]:Indicates the wiring harness and wiring harness connector. The wiring harness with male terminal is shown with arrows (). Outside numerals are pin numbers. FemaleMale ( ) The first letter of the code for each wiring harness and wiring harness connector(s) indicates the component’s location, e.g, ”E” for the Engine Compartment, ”I” for the Instrument Panel and Surrounding area, and ”B” for the Body and Surrounding area. When more than one code has the first and second letters in common, followed by numbers (e.g, IH1, IH2), this indicates the same type of wiring harness and wiring harness connector. [F]:Represents a part (all parts are shown in sky blue). The code is the same as the code used in parts position. [G]:Junction Block (The number in the circle is the J/B No. and the connector code is shown beside it). Junction Blocks are shaded to clearly separate them from other parts. 3C indicates that it is inside Junction Block No.3 Example: ,,,, ,,,, ,,,, ,,,, ,,,, ,,,, ,,,, [H]:When 2 parts both use one connector in common, the parts connector name used in the wire routing section is shown in square brackets []. [I]:Indicates the wiring color. Wire colors are indicated by an alphabetical code. B=BlackW=WhiteBR=Brown L=BlueV=VioletSB=Sky Blue R=RedG=GreenLG=Light Green P=PinkY=YellowGR=Gray O=Orange The first letter indicates the basic wire color and the second letter indicates the color of the stripe. Example: L – Y L (Blue) Y (Yellow) [J]:Indicates a wiring Splice Point (Codes are ”E” for the Engine Room, ”I” for the Instrument Panel, and ”B” for the Body).The Location of splice Point I 5 is indicated by the shaded section. [K]:Indicates a shielded cable. [L]:Indicates the pin number of the connector. The numbering system is different for female and male connectors. Example:Numbered in order from upper left to lower right Numbered in order from upper right to lower left FemaleMale [M]:Indicates a ground point. The first letter of the code for each ground point(s) indicates the component’s location, e.g, ”E” for the Engine Compartment, ”I” for the Instrument Panel and Surrounding area, and ”B” for the Body and Surrounding area. [N]:Page No. :autoelectric 。。。。。。