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FOREWORD This wiring diagram manual has been prepared to provide information on the electrical system of the 2004 LAND CRUISER Applicable models: UZJ100 Series For service specifications and repair procedures of the above models other than those listed in this manual, refer to the following manuals; Manual Name Y 2004 LAND CRUISER Repair Manual Volume Volume Y 2004 TOYOTA New Car Features Pub No RM1071U1 RM1071U2 NCF257U All information in this manual is based on the latest product information at the time of publication However, specifications and procedures are subject to change without notice NOTICE When handling supplemental restraint system components (removal, installation or inspection, etc.), always follow the direction given in the repair manuals listed above to prevent accidents and supplemental restraint system malfunction 2004 LAND CRUISER ELECTRICAL WIRING DIAGRAM Section Code Page INTRODUCTION A HOW TO USE THIS MANUAL B TROUBLESHOOTING C 12 ABBREVIATIONS D 17 GLOSSARY OF TERMS AND SYMBOLS E 18 RELAY LOCATIONS F 20 ELECTRICAL WIRING ROUTING G 68 SYSTEM CIRCUITS H 93 GROUND POINT I 376 POWER SOURCE (Current Flow Chart) J 384 CONNECTOR LIST K 394 PART NUMBER OF CONNECTORS L 406 OVERALL ELECTRICAL WIRING DIAGRAM M 410 Y2003 All rights reserved This book may not be reproduced or copied, in whole or in part, without the written permission of Toyota Motor Corporation 2004 LAND CRUISER (EWD548U) A INTRODUCTION This manual consists of the following 13 sections: No Section Description 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 TROUBLESHOOTING 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 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 I GROUND POINT Shows ground positions of all parts described in this manual J POWER SOURCE (Current Flow Chart) Describes power distribution from the power supply to various electrical loads K CONNECTOR LIST Describes the form of the connectors for the parts appeared in this book This section is closely related to the system circuit L PART NUMBER OF CONNECTORS Indicates the part number of the connectors used in this manual M OVERALL ELECTRICAL WIRING DIAGRAM Provides circuit diagrams showing the circuit connections A H 2004 LAND CRUISER (EWD548U) 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 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 2004 LAND CRUISER (EWD548U) B HOW 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 [A] Stop Light From Power Source System (See Page 66) 15A STOP 7.5A GAUGE IB [B] R L IB IB [C] IB R L L (S/D) R (W/G) W R [G] [E] 14 IE1 [D] Rear Lights S6 Stop Light SW I5 [F] Y G G W L (S/D) G W 13 G W ABS ECU C7 Combination Meter [J] (Shielded) R6 Rear Combination Light LH H17 High Mounted Stop Light [K] B18 W B W B BV1 W B W B BO 50 [L] BL [M] 2004 LAND CRUISER (EWD548U) W B Stop W B [I] B18 G R R7 Rear Combination Light RH G R G R BV1 Stop 11 G B [H] G R L4 Light Failure Sensor B [A] : System Title [H] : 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 to distinguish it from the J/B Example: B W = White BR = Brown L Indicates Relay Block No.1 = Black = Blue V SB = Sky Blue = Violet R = Red G = Green LG = Light Green [C] : ( ) is used to indicate different wiring and connector, etc when the vehicle model, engine type, or specification is different P Y GR = Gray [D] : Indicates related system The first letter indicates the basic wire color and the second letter indicates the color of the stripe = Pink = Yellow O = Orange [E] : Indicates the wiring harness and wiring harness connector The wiring harness with male terminal is shown with arrows ( ) Outside numerals are pin numbers Example: L-Y L (Blue) [I] Female Male ( ) Y (Yellow) : Indicates a wiring Splice Point (Codes are ”E” for the Engine Room, ”I” for the Instrument Panel, and ”B” for the Body) 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 Example: 3C indicates that it is inside Junction Block No.3 The Location of splice Point I is indicated by the shaded section [J] : Indicates a shielded cable [K] : 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 Female Numbered in order from upper right to lower left Male [L] : 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 [M] : Page No 2004 LAND CRUISER (EWD548U) B HOW TO USE THIS MANUAL [N] System Outline Current is applied at all times through the STOP fuse to TERMINAL of the stop light SW When the ignition SW is turned on, current flows from the GAUGE fuse to TERMINAL of the light failure sensor, and also flows through the rear lights warning light to TERMINAL of the light failure sensor Stop Light Disconnection Warning When the ignition SW is turned on and the brake pedal is pressed (Stop light SW on), if the stop light circuit is open, the current flowing from TERMINAL of the light failure sensor to TERMINALS 1, changes, so the light failure sensor detects the disconnection and the warning circuit of the light failure sensor is activated As a result, the current flows from TERMINAL of the light failure sensor to TERMINAL 11 to GROUND and turns the rear lights warning light on By pressing the brake pedal, the current flowing to TERMINAL of the light failure sensor keeps the warning circuit on and holds the warning light on until the ignition SW is turned off [O] Service Hints S6 Stop Light SW 2-1 : Closed with the brake pedal depressed L4 Light Failure Sensor 1, 2, 7-Ground : Approx 12 volts with the stop light SW on 4, 8-Ground : Approx 12 volts with the ignition SW at ON position 11-Ground : Always continuity : Parts Location [P] Code See Page Code See Page Code See Page C7 34 L4 36 R7 37 H17 36 R6 37 S6 35 : Relay Blocks [Q] Code See Page 18 Relay Blocks (Relay Block Location) R/B No.1 (Instrument Panel Brace LH) : Junction Block and Wire Harness Connector [R] Code See Page Junction Block and Wire Harness (Connector Location) IB 20 Instrument Panel Wire and Instrument Panel J/B (Lower Finish Panel) 3C 22 Instrument Panel Wire and J/B No.3 (Instrument Panel Brace LH) [S] : Connector Joining Wire Harness and Wire Harness Code See Page Joining Wire Harness and Wire Harness (Connector Location) IE1 42 Floor Wire and Instrument Panel Wire (Left Kick Panel) BV1 50 Luggage Room Wire and Floor Wire (Luggage Room Left) [T] : Ground Points Code See Page Ground Points Location BL 50 Under the Left Center Pillar BO 50 Back Panel Center [U] : Splice Points Code I5 See Page 44 Wire Harness with Splice Points Code Cowl Wire B18 See Page 50 2004 LAND CRUISER (EWD548U) Wire Harness with Splice Points Luggage Room Wire B [N] : Explains the system outline [O] : Indicates values or explains the function for reference during troubleshooting [P] : Indicates the reference page showing the position on the vehicle of the parts in the system circuit Example : Part ”L4” (Light Failure Sensor) is on page 36 of the manual ∗ The letter in the code is from the first letter of the part, and the number indicates its order in parts starting with that letter Á Á Example : L Parts is 4th in order Light Failure Sensor [Q] : Indicates the reference page showing the position on the vehicle of Relay Block Connectors in the system circuit Example : Connector ”1” is described on page 18 of this manual and is installed on the left side of the instrument panel [R] : Indicates the reference page showing the position on the vehicle of J/B and Wire Harness in the system circuit Example : Connector ”3C” connects the Instrument Panel Wire and J/B No.3 It is described on page 22 of this manual, and is installed on the instrument panel left side [S] : Indicates the reference page describing the wiring harness and wiring harness connector (the female wiring harness is shown first, followed by the male wiring harness) Example : Connector ”IE1” connects the floor wire (female) and Instrument panel wire (male) It is described on page 42 of this manual, and is installed on the left side kick panel [T] : Indicates the reference page showing the position of the ground points on the vehicle Example : Ground point ”BO” is described on page 50 of this manual and is installed on the back panel center [U] : Indicates the reference page showing the position of the splice points on the vehicle Example : Splice point ”I5” is on the Cowl Wire Harness and is described on page 44 of this manual 2004 LAND CRUISER (EWD548U) B HOW TO USE THIS MANUAL The ground points circuit diagram shows the connections from all major parts to the respective ground points When troubleshooting a faulty ground point, checking the system circuits which use a common ground may help you identify the problem ground quickly The relationship between ground points ( EA , IB and IC shown below) can also be checked this way I GROUND POINT W-B E3 W-B 5 O/D Main SW E3 A/C Relay No.3 A A/C Control Assembly W-B A/C Relay No.2 W-B Cigarette Lighter FAN MAIN Relay A W-B W-B FAN MAIN Relay Clock Blower Motor I6 W-B W-B A A W-B W-B Blower SW I6 A W-B A W-B Parking Brake SW E3 J1 Junction Connector W-B Radiator Fan Motor E3 3B W-B Headlight Cleaner Relay E2 W-B Combination Meter W-B W-B Headlight LH E4 E5 W-B W-B 3F W-B Front Fog Light LH W-B 13 3G W-B W-B E5 W-B Front Turn Signal Light LH W-B E4 W-B E6 Brake Fluid Level SW W-B W-B W-B B4 IA1 Cruise Control ECU Remote Control Mirror SW Turn Signal Flasher 3E W-B Front Clearance Light LH Door Lock Control SW W-B I2 3D W-B E4 Front Clearance Light RH W-B Front Fog Light RH W-B E4 W-B Front Turn Signal Light RH Combination SW 3C W-B Headlight RH W-B 3E W-B I4 W-B Defogger SW I2 W-B I2 Combination SW B4 W-B W-B W-B 15 W-B ID1 W-B W-B W-B Unlock Warning SW I5 10 EA2 Door Lock Control Relay W-B I5 W-B B4 Door Lock Motor RH W-B W-B W-B Door Courtesy SW RH I5 W-B Power Window Master SW B5 W-B B5 EA W-B IB1 W-B I4 W-B I8 W-B W-B A/C Amplifier Door Courtesy SW LH B5 Door Lock Control SW B5 W-B W-B W-B Idle-Up SW W-B W-B W-B Blower Resistor Power Window Control Relay Door Lock Motor LH W-B (4A-GZE) 4 IC3 W-B W-B BR Radio and Player Fuel Control SW I5 I5 W-B Woofer Speaker Amplifier BR W-B BR BR I3 BR Combination Meter I3 BR Fuel Sender W-B BR BR Auto Antenna Motor Combination Meter BA1 W-B HEATER Relay IB ∗ IC The system shown here is an EXAMPLE ONLY It is different to the actual circuit shown in the SYSTEM CIRCUITS SECTION 2004 LAND CRUISER (EWD548U) B The ”Current Flow Chart” section, describes which parts each power source (fuses, fusible links, and circuit breakers) transmits current to In the Power Source circuit diagram, the conditions when battery power is supplied to each system are explained Since all System Circuit diagrams start from the power source, the power source system must be fully understood J POWER SOURCE (Current Flow Chart) The chart below shows the route by which current flows from the battery to each electrical source (Fusible Link, Circuit Breaker, Fuse, etc.) and other parts 10A ECU-B Short Pin 2 7.5A DOME 15A EFI 30A AM2 Battery Fusible Link Block 10A HAZARD 20A RADIO NO.1 S2 Starter 10A HORN 100A ALT 60A ABS Engine Room R/B (See Page 20) Fuse System Page STOP 10A 194 187 180 166 210 DOME 20A ABS ABS and Traction Control Cruise Control Electronically Controlled Transmission Multiplex Communication System Cigarette Lighter Combination Meter Headlight Interior Light Key Reminder and Seat Belt Warning Light Auto Turn Off Theft Deterrent and Door Lock Control 214 230 112 122 Power Source 40A DOOR LOCK CB 1.25B FL MAIN W W 7.5A DOME W W 2 W B B EB1 W I2 W I2 B W 15A HAZ-RADIO W AM2 E7 W EB1 AM1 W-R W-R 7.5A AM2 B TAIL Relay E7 B B STARTER Relay I8 Ignition SW B-W W-B G 15A TAIL B-W G 20A DEFOG B-Y W-R B 2 W-B G-W B INJECTION Relay IG1 ACC B-O IG2 B B R 1 W I2 50A MAIN E7 E7 W-L W Battery EA2 EA1 W 1 W W E6 15A RAD CIG B-Y ∗ P-L The system shown here is an EXAMPLE ONLY It is different to the actual circuit shown in the SYSTEM CIRCUITS SECTION 2004 LAND CRUISER (EWD548U) L- B From Power Source System (See Page 94) A45(A), A46(B), A47(C) A/C Control Assembly 15A A/C 10 4F 71 3Q 19 3K 2D R W B (Shielded) 4A L- W 16 IV4 19 2E 22 2Q J23(B), J25(A) Junction Connector SB 17 IV4 R IV4 W 15 B 19 IV4 (Shielded) IV4 W- B 18 +B 11 C 18 4A W- B 4C IG R- L B W- B FRCSD L- W FRCLK B SB FRCID 10 B L- W VER1 18 C 22 C R- L 10A ECU- B2 H A F B H A (*1) F B (*2) L- B H A F B H A (*1) F B (*2) L- W W- B W- B W- B R W B B14 W- B W- B LG- R W- B LG- R * : w/ Navigation System * : w/o Navigation System BK 367 2004 LAND CRUISER (EWD548U) Air Conditioning (Rear) From Power Source System (See Page 94) HRRH VMRH L- B 18 IA2 R- W 19 BD3 18 BD3 R- W L BL4 R- G BL4 L 18 3K BLWRH 16 A R- G 15 A R- W 14 A R- G 10A RR HTR A32(A), A33(B), A34(C) A/C Amplifier (Rear) M L- B R22 Rear Heater Blower Motor L- B L 10 3B 71 1B 52 1B F F R25 Rear Heater Power Transistor RR HTR Relay J22 Junction Connector L- B 50 1B L- B W- B L- B L- W W- B W- B R R W W B B W- B W- B LG- R LG- R W- B L- W BJ 368 2004 LAND CRUISER (EWD548U) A32(A), A33(B), A34(C) A/C Amplifier (Rear) +B A GND 22 A CSD 19 A CLK 20 A CID 18 A BLWC A VMC HRRC A 13 A R- Y W- L W- L 30A RR A/C R- Y 10 BW1 LG R B W R BW1 L- W BW1 R W- B From Power Source System (See Page 94) R17 Rear Cooler Relay LG 42 3K W R- L L LG R14 Rear Cooler Blower Motor M B19 R- L R- L W W- B R16 Rear Cooler Power Transistor BW1 LG- R W- B BW1 R15 Rear Cooler Magnetic Valve L- W W- B R W B W- B LG- R 369 2004 LAND CRUISER (EWD548U) Air Conditioning (Rear) A32(A), A33(B), A34(C) A/C Amplifier (Rear) GR- R Y W- L BL4 BL4 BL4 GR- R R- Y Y W- L BD3 16 BD3 15 BD3 14 BD3 13 BD3 R- Y Y W- L J22 Junction Connector D D D Y- G PT VZ MHOT MCOOL Warm Y- G GND M Cool BW1 Y- G R- Y BL4 BL1 GR- R R- L MCR 11 A Y- G BW1 Y- G C A C B J23(B), J25(A) Junction Connector (* 1) C A C B (* 2) Y- G MHR 12 A Y- G 35 3K S51 A Y- G BW1 B- W B- W 39 3K A Y- G C A (*1) C B (*2) Y 10A ECU- IG2 TPH A R21 Rear Evaporator Temp Sensor From Power Source System (See Page 94) SG1 Y TER A B- W IG1 A R9 Rear Air Mix Control Servo Motor Y- G * : w/ Navigation System * : w/o Navigation System 370 2004 LAND CRUISER (EWD548U) A32(A), A33(B), A34(C) A/C Amplifier (Rear) GR- G FACE- I 15 C B/L- I 16 C FOOT- I 17 C W- R HI- I 18 C W- G ME- I C G LO- I C L C L AUTO- I L- W L- O S52 B L- R TESTR B G- Y R34 Room Temp Sensor (Rear) BL4 12 B Y- R SG2 B TRR B GR- G TINR A B13 W- R W- G G L L L- W L- R Y- R L- O G- Y Y- G R26 Rear Inlet Air Temp Sensor G- Y GR- G 17 BD3 Y- G FACE- I B/L- I FOOT- I Hot Foot HI- I Bi- Level ME- I Face LO- I HI AUTO- I Middle 22 S5 LO 21 T- SET AUTO 20 SG Cool R8 Rear A/C Control SW 371 2004 LAND CRUISER (EWD548U) Air Conditioning (Rear) A32(A), A33(B), A34(C) A/C Amplifier (Rear) OFF- S AUTO- S C C W- G LO- S C Y- B ME- S C GR HI- S C L- Y R- Y FACE- S 10 C GR- R B/L- S 11 C R- G 12 C R- L FOOT- S G- W RG C G ILL+2 B L- R IG2 B 17 18 19 ME- S LO- S OFF- S AUTO- S AUTO W- G 16 HI- S OFF Y- B 15 FACE- S LO GR 14 B/L- S Middle L- Y 13 FOOT- S HI GR- R 12 SRG Illumination Foot 10 RG Face R- L 11 ILL Bi- Level R- Y R- G IG G- W G G- W L- R B13 R8 Rear A/C Control SW 372 2004 LAND CRUISER (EWD548U) System Outline Cooler and Heater Blower Operation ∗ Manual operation When the blower control SW in the rear A/C control SW is set to any blower speed, a signal is sent to the A/C amplifier The A/C amplifier controls the power transistor and operates the rear cooler blower motor and rear heater blower motor at the set speed ∗ Auto operation When the auto SW in the rear A/C control SW is operated, a signal is sent to the A/C amplifier The A/C amplifier controls the power transistor according to the signals from respective sensors, and operates the rear cooler blower motor and rear heater blower motor Air Mix Control Servo Motor Control When the temperature control lever in the rear A/C control SW is operated, a signal is sent to the A/C amplifier The A/C amplifier controls the rear air mix control servo motor to operate the damper until it reaches the temperature set by the temperature control lever Air Conditioning Operation The cooler and heater operation can be switched by the mode select SW in the rear A/C control SW Service Hints A32 A/C Amplifier (Rear) 1-Ground : Always approx 12 volts 2-Ground : Approx 12 volts with ignition SW at ON or ST position 22-Ground : Always continuity : Parts Location Code See Page Code See Page Code See Page A32 A 72 J11 71 R16 73 A33 B 72 J22 72 R17 73 A34 C 72 J23 B 72 R21 73 A45 A 70 J25 A 72 R22 73 A46 B 70 R8 73 R25 73 A47 C 70 R9 73 R26 73 F16 68 R14 73 R34 73 I18 70 R15 73 : Junction Block and Wire Harness Connector Code 1B See Page Junction Block and Wire Harness (Connector Location) 24 Engine Room No.2 Wire and Engine Room J/B (Engine Compartment Left) 28 Engine Room No Wire and Cowl Side J/B LH (Left Kick Panel) No.2 28 Dash Wire and Cowl Side J/B LH (Left Kick Panel) 2Q 30 Instrument Panel Integration Wire and Cowl Side J/B LH (Left Kick Panel) 3B 40 Engine Room No.2 Wire and Cowl Side J/B RH (Right Kick Panel) 3K 40 Floor No.2 Wire and Cowl Side J/B RH (Right Kick Panel) 3Q 42 Instrument Panel Integration Wire and Cowl Side J/B RH (Right Kick Panel) 52 Dash Wire and J/B No.4 ( (Instrument Panel Center) ) 2B 2C 2D 2E 4A 4C 4F 373 2004 LAND CRUISER (EWD548U) Air Conditioning (Rear) : Connector Joining Wire Harness and Wire Harness Code See Page Joining Wire Harness and Wire Harness (Connector Location) IA2 78 Engine Room No.2 Wire and Floor No.1 Wire (Left Kick Panel) IV4 82 Dash Wire and Floor No.2 Wire (Right Kick Panel) BD3 86 Floor No.3 Wire and Floor No.1 Wire (Left Rear Side Quarter Panel) 88 Floor No Wire and Floor No Wire (Right Side of Rear Floor Crossmember) No.2 No.3 88 Floor No.2 Wire and A/C Sub Wire (Right Side Rear Quarter Panel) BL1 BL4 BW1 : Ground Points Code See Page Ground Points Location IF 78 Set Bolt of Cowl Side J/B LH BJ 86 Under the Driver’s Seat BK 86 Front Side Under the Front Passenger’s Seat : Splice Points Code Wire Harness with Splice Points Code B13 88 See Page Roof No.2 Wire B19 B14 88 See Page Floor No.2 Wire 88 374 2004 LAND CRUISER (EWD548U) Wire Harness with Splice Points A/C Sub Wire Memo 375 2004 LAND CRUISER (EWD548U) SYSTEM CIRCUITS H 2004 LAND CRUISER ELECTRICAL WIRING DIAGRAM SYSTEM CIRCUITS Air Conditioning (Front) Air Conditioning (Rear) Auto Antenna Automatic Glare-Resistant EC Mirror with Compass Automatic Light Control Back-Up Light Center Differential Lock Charging Cigarette Lighter Combination Meter Cruise Control Door Lock Control Electronically Controlled Transmission and A/T Indicator Engine Control Engine Immobiliser System Front Fog Light Front Wiper and Washer Garage Door Opener Headlight Horn Ignition Illumination Interior Light Key Reminder Light Auto Turn Off Mirror Heater Moon Roof Multi-Display (w/o Navigation System) Multiplex Communication System Multiplex Communication System (Communication Bus) Navigation System Power Outlet Power Rear Quarter Window Power Seat Power Source Power Tilt and Power Telescopic Power Window Radio and Player (w/ Navigation System) Radio and Player (w/o Navigation System) Rear Window Defogger Rear Wiper and Washer Remote Control Mirror Seat Belt Warning Seat Heater Shift Lock SRS Starting Stop Light Taillight Theft Deterrent TOYOTA Parking Assist (Rear View Monitor) Trailer Towing Turn Signal and Hazard Warning Light VSC Wireless Door Lock Control Page 356 366 322 304 164 162 246 104 204 350 222 260 212 108 124 132 196 210 128 208 100 142 148 316 166 314 256 348 172 168 336 206 306 294 94 298 250 324 330 312 200 302 320 308 244 237 98 156 138 282 336 158 134 228 270 93 2004 LAND CRUISER (EWD548U) C TROUBLESHOOTING To Ignition SW IG Terminal Fuse [A] SW Voltmeter [B] VOLTAGE CHECK (a) Establish conditions in which voltage is present at the check point Example: [A] - Ignition SW on [B] - Ignition SW and SW on [C] - Ignition SW, SW and Relay on (SW off) (b) Using a voltmeter, connect the negative lead to a good ground point or negative battery terminal, and the positive lead to the connector or component terminal This check can be done with a test light instead of a voltmeter Relay [C] Solenoid SW CONTINUITY AND RESISTANCE CHECK (a) Disconnect the battery terminal or wire so there is no voltage between the check points (b) Contact the two leads of an ohmmeter to each of the check points Ohmmeter SW If the circuit has diodes, reverse the two leads and check again When contacting the negative lead to the diode positive side and the positive lead to the negative side, there should be continuity When contacting the two leads in reverse, there should be no continuity Ohmmeter Diode (c) Use a volt/ohmmeter with high impedance (10 kΩ/V minimum) for troubleshooting of the electrical circuit Digital Type Analog Type 12 2004 LAND CRUISER (EWD548U) C FINDING A SHORT CIRCUIT To Ignition SW IG Terminal Test Light (a) Remove the blown fuse and disconnect all loads of the fuse (b) Connect a test light in place of the fuse (c) Establish conditions in which the test light comes on Example: [A] - Ignition SW on [B] - Ignition SW and SW on [C] - Ignition SW, SW and Relay on (Connect the Relay) and SW off (or Disconnect SW 2) Fuse Case Short [A] (d) Disconnect and reconnect the connectors while watching the test light The short lies between the connector where the test light stays lit and the connector where the light goes out (e) Find the exact location of the short by lightly shaking the problem wire along the body SW Short [B] Disconnect Disconnect Light CAUTION: Relay (a) Do not open the cover or the case of the ECU unless absolutely necessary (If the IC terminals are touched, the IC may be destroyed by static electricity.) (b) When replacing the internal mechanism (ECU part) of the digital meter, be careful that no part of your body or clothing comes in contact with the terminals of leads from the IC, etc of the replacement part (spare part) Short [C] Disconnect SW Solenoid DISCONNECTION OF MALE AND FEMALE CONNECTORS To pull apart the connectors, pull on the connector itself, not the wire harness HINT : Check to see what kind of connector you are disconnecting before pulling apart Pull Up Pull Up Press Down Press Down 13 2004 LAND CRUISER (EWD548U) C TROUBLESHOOTING HOW TO REPLACE TERMINAL (with terminal retainer or secondary locking device) Reference: PREPARE THE SPECIAL TOOL 10 HINT : To remove the terminal from the connector, please construct and use the special tool or like object shown on the left DISCONNECT CONNECTOR Example: (Case 1) 0.2 (mm) Up Tool DISENGAGE THE SECONDARY LOCKING DEVICE OR TERMINAL RETAINER (a) Locking device must be disengaged before the terminal locking clip can be released and the terminal removed from the connector (b) Use a special tool or the terminal pick to unlock the secondary locking device or terminal retainer NOTICE: Do not remove the terminal retainer from connector body Terminal Retainer [A] Terminal Retainer For Non-Waterproof Type Connector HINT : The needle insertion position varies according to the connector’s shape (number of terminals etc.), so check the position before inserting it [Retainer at Full Lock Position] Stopper ”Case 1” Raise the terminal retainer up to the temporary lock position Terminal Retainer [Retainer at Temporary Lock Position] Example: (Case 2) Secondary Locking Device ”Case 2” Open the secondary locking device 14 2004 LAND CRUISER (EWD548U) C Tool Tab Tab Example: (Case 1) [B] Terminal Retainer Tool [Male] Access Hole ( Mark) Tool For Waterproof Type Connector HINT : Terminal retainer color is different according to connector body Example: Terminal Retainer Black or White Black or White Gray or White : Connector Body : Gray : Dark Gray : Black [Female] ”Case 1” Type where terminal retainer is pulled up to the temporary lock position (Pull Type) Insert the special tool into the terminal retainer access hole (YMark) and pull the terminal retainer up to the temporary lock position HINT : The needle insertion position varies according to the connector’s shape (Number of terminals etc.), so check the position before inserting it Retainer at Full Lock Position Retainer at Temporary Lock Position [Male] Example: (Case 2) [Female] ”Case 2” Type which cannot be pulled as far as Power Lock insert the tool straight into the access hole of terminal retainer as shown Terminal Retainer Tool Tool [Male] Press Down Press Down [Female] 15 2004 LAND CRUISER (EWD548U) C TROUBLESHOOTING Push the terminal retainer down to the temporary lock position Retainer at Full Lock Position Retainer at Temporary Lock Position [Male] [Female] (c) Release the locking lug from terminal and pull the terminal out from rear Locking Lug Tool INSTALL TERMINAL TO CONNECTOR (a) Insert the terminal HINT: Make sure the terminal is positioned correctly Insert the terminal until the locking lug locks firmly Insert the terminal with terminal retainer in the temporary lock position (b) Push the secondary locking device or terminal retainer in to the full lock position CONNECT CONNECTOR 16 2004 LAND CRUISER (EWD548U) ... V3 V4 Black Black Black Black 2 404 2004 LAND CRUISER (EWD548U) V7 12 V6 12 K V8 V9 V10 W1 Black Gray Blue Gray 1 2 W4 Y1 Black 2 4 Z1 405 2004 LAND CRUISER (EWD548U) G ELECTRICAL WIRING ROUTING... Room J/B) 77 2004 LAND CRUISER (EWD548U) G ELECTRICAL WIRING ROUTING : Location of Connector Joining Wire Harness and Wire Harness : Location of Ground Points 78 2004 LAND CRUISER (EWD548U) G... g ( ) IG5 79 2004 LAND CRUISER (EWD548U) G ELECTRICAL WIRING ROUTING : Location of Connector Joining Wire Harness and Wire Harness : Location of Splice Points 80 2004 LAND CRUISER (EWD548U) G