LEXUS LX470 UZJ100 series Electrical Wiring Diagram EWD338U All (EN)

A INTRODUCTION This manual consists of the following 11 sections: 2 No. Section Description A INDEX Index of the contents of this manual. INTRODUCTION Brief explanation of each section. B HOW TO USE THIS MANUAL Instructions on how to use this manual. C TROUBLE− SHOOTING Describes the basic inspection procedures for electrical circuits. D ABBREVIATIONS Defines the abbreviations used in this manual. E GLOSSARY OF TERMS AND SYMBOLS Defines the symbols and functions of major parts. F RELAY LOCATIONS Shows position of the Electronic Control Unit, Relays, Relay Block, etc. This section is closely related to the system circuit.

G ELECTRICAL WIRING ROUTING Describes position of Parts Connectors, Splice points, Ground points, etc. This section is closely related to the system circuit. H POWER SOURCE (Current Flow Chart) Describes power distribution from the power supply to various electrical loads. I 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 sue this manual”). The “System Outline” and “Service Hints” useful for troubleshooting are also contained in this section.

J GROUND POINTS Shows ground positions of all the parts decribed in this manual. K OVERALL ELECTRICAL WIRING DIAGRAM Provides circuit diagrams showing the circuit connections.

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HOW TO USE THIS MANUAL B 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 Points 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. 3

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B A : System Title J : Indicates the wiring color. Wire colors are indicated by an alphabetical code. B : Indicates a Relay Block. No shading is used and only the Relay Block No. is shown distinguish it from the J/B. B = Black BR = Brown G = Green GR = Gray L = Blue LG = Light Green O = Orange P = Pink R = Red V = Violet W = White Y = Yellow Example: 1 Indicates Relay Block No. 1. C : Indicates the connector to be connected to a part (the numeral indicates the pin No.) Explanation of pin use. The first letter indicates the basic wire color and the second letter indicates the color of the stripe. Example: L − Y K :

Indicates a wiring Splice Point (Codes are “E” for the Engine Room, “I” for the Instrument Panel, and “B” for the Body). (blue) (yellow) The pins shown are only for the highest grade, or only include those in the specification. Example: D : Connector Color Connectors not indicated are milky white in color: E : ( ) is used to indicate different wiring and connector, etc. when the vehicle model, engine type, or specification is different. The Location of Splice Point I 5 is indicated by the shaded section. F : Indicates related system. L : Page No. G : Indicates the wiring harness and wiring harness connector. The wiring harness with male terminal is shown with arrows ( ). v v M :

Indicates a shielded cable. N : Indicates a ground point. The first letter of the code for each wiring harness and wiring harness connector(s) indicates thecomponent’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. 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. O : Indicates the pin number of the connector. The numbering system is different for female and male connectors.

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. lower right lower left H : Represents a part (all parts are shown in sky blue). The code is the same as the code used in parts position. I : 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 then from other parts. Example: P : When 2 parts both use one connector in common, the parts connector name used in the wire routing section is shown in square brackets [ ]. 3B indicates that it is inside Junction Block No. 3. 5

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B HOW TO USE THIS MANUAL Q (FOR THE DOWN OPERATION, CURRENT FLOWS IN THE REVERSE DIRECTION BECAUSE THE TERMINALS WHERE IT FLOWS ARE CHANGED). R S T U IH1 26 FRONT DOOR LH WIRE AND COWL WIRE (LEFT KICK PANEL) X I 5 24 COWL WIRE 6 SYSTEM OUTLINE WITH THE IGNITION SW TURNED ON, THE CURRENT FLOWS TO TERMINAL 3 OF THE POWER WINDOW MASTER SW, TERMINAL 2 OF THE POWER WINDOW CONTROL RELAY AND TERMINAL 8 OF THE POWER WINDOW SW THROUGH THE DOOR FUSE. 1.

DRIVER’S WINDOW “MANUAL UP” OPERATION BY MASTER SW HOLDING MANUAL SW (DRIVER’S) ON “UP” POSITION LOCATED IN POWER WINDOW MASTER SW, THE CURRENT FLOWS TO TERMINAL 5 OF THE POWER WINDOW CON- TROL RELAY THROUGH TERMINAL 3 OF THE MASTER SW  TERMINAL 2 TO OPERATE A POWER WINDOW CONTROL RELAY. THUS THE CURRENT INSIDE THE RELAY FLOWS FROM TERMINAL 2 OF THE RELAY  TERMINAL 1  TERMINAL 2 OF THE POWER WINDOW MOTOR  TERMINAL 1  TERMINAL 4 OF THE RELAY  TERMI- NAL 3  TO GROUND. THE MOTOR TURNS TO ASCENT THE WINDOW. RELEASING THIS SW, THE ROTATION OF MOTOR IS STOPPED AND THE WINDOWS CAN STOP AT WILL POINT.

(FOR THE “MANUAL DOWN” OPERATION, CURRENT FLOWS IN THE REVERSE DIRECTION BECAUSE THE TERMINALS WHERE IT FLOW ARE CHANGED). 2. DRIVER’S WINDOW “AUTO DOWN” OPERATION BY MASTER SW ONCE THE “AUTO DOWN” BUTTON OF THE MASTER SW IS PUSHED, THE CURRENT FLOW TERMINAL 9 OF THE POWER WINDOW CONTROL RELAY THROUGH TERMINAL 3 OF THE MASTER SW TERMINALS 8 AND 9 TO OPERATE THE RELAY. THUS THE CURRENT INSIDE THE POWER WINDOW CONTROL RELAY FLOWS FROM TERMINAL 2 OF THE RELAY  TERMINAL 4  TERMINAL 1 OF THE POWER WINDOW MOTOR  TERMINAL 2  TERMINAL 1 OF THE RELAY  TERMINAL 3  TO GROUND. THE MOTOR CONTINUES THE ROTATION ENABLING TO DESCENT THE WINDOW. THE WINDOW DESCENDS TO THE END POSITION.

THE CURRENT WILL BE CUT OFF TO RELEASE THE AUTO DOWN FUNCTION BASED ON THE INCREASING CURRENT BETWEEN TERMINAL 2 OF THE RELAY AND TERMINAL 1 IN RELAY. 3. DRIVER’S WINDOW AUTO DOWN RELEASE OPERATION BY MASTER SW HOLDING THE MANUAL SW (DRIVER’S) ON “UP” POSITION IN OPERATING AUTO DOWN. THE CURRENT FROM TERMINAL 3 OF THE MASTER SW PASSING TERMINAL 2 FLOWS TERMINAL 5 OF THE RELAY AND RELEASES THE AUTO DOWN FUNCTION IN THE POWER WINDOW CONTROL RELAY. RELEASING THE HAND FROM SW, WINDOW STOPS AND CONTINUING ON TOUCHING SW. THE FUNCTION SWITCHES TO MANUAL UP OPERATION. 4.

PASSENGER’S WINDOW UP OPERATION (MASTER SW) AND WINDOW LOCK SW OPERATION HOLDING PASSENGER’S WINDOW SW (MASTER SW) ON “UP”, THE CURRENT FLOWS FROM TERMINAL 3 OF THE MASTER SW PASSING TERMINAL 6 TO TERMINAL 3 OF THE POWER WINDOW SW (PASSENGER’S)  TERMINAL 4 TERMINAL  2 OF THE MOTOR  TERMINAL 1  TERMINAL 9 OF THE POWER WINDOW SW  TERMINAL 7  TERMINAL 1 OF THE MASTER SW  TERMINAL 4 TO GROUND. THE MOTOR RUNS TO ASCENT THE WINDOW. RELEASING THIS SW, THE ROTATION OF MOTOR IS STOPPED AND WINDOW CAN STOP AT WILL PLACE. SWITCHING THE WINDOW LOCK SW IN “LOCK” POSITION, THE CIRCUIT IS OPENED AND STOPPED THE MOTOR ROTA- TION. SERVICE HINTS P 2 POWER WINDOW CONTROL RELAY 3−GROUND:

ALWAYS CONTINUITY 2−GROUND: APPROX. 12 VOLTS WITH THE IGNITION SW AT ON POSITION 5−GROUND: APPROX. 12 VOLTS WITH THE IGNITION SW AT ON POSITION AND THE MASTER SW AT UP POSITION 8−GROUND: APPROX. 12 VOLTS WITH THE IGNITION SW AT ON POSITION AND THE MASTER SW AT AUTO DOWN POSITION 9−GROUND: APPROX. 12 VOLTS WITH THE IGNITION SW AT ON POSITION AND THE MASTER SW AT DOWN OR AUTO DOWN POSITION P 4 POWER WINDOW MASTER SW 4−GROUND: ALWAYS CONTINUITY 3−GROUND: APPROX. 12 VOLTS WITH THE IGNITION SW AT ON POSITION WINDOW LOCK SW SERVICE HINTS : PART S LOCATION CODE SEE PAGE CODE SEE PAGE CODE SEE PAGE P2 21 P4 21 P6 21 : RELA Y BLOCKS CODE SEE PAGE RELAY BLOCK (RELAY BLOCK LOCATION) :

JUNC CODE TION BLOCK AND WIRE HAR SEE PAGE NESS CONNECTOR JUNCTION BLOCK AND WIRE HARNESS (CONNECTOR LOCATION) V : CONNECTOR JOINING WIRE HA RNESS AND WIRE HARNESS CODE SEE PAGE JOINING WIRE HARNESS AND WIRE HARNESS (CONNECTOR LOCATION) ID1 26 FRONT DOOR RH WIRE AND COWL WIRE (RIGHT KICK PANEL) W : GRO UND POINTS CODE SEE PAGE GROUND POINT LOCATION : SPLICE POINTS CODE SEE PAGE WIRE HARNESS WITH SPLICE POINTS CODE SEE PAGE WIRE HARNESS WITH SPLICE POINTS

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