WIXLIB

B HOW TO USE THIS MANUALThe ground points circuit diagram shows the connections from all major parts to the respective ground points. Whentroubleshooting a faulty ground point, checking the system circuits which use a common ground may help you identifythe problem ground quickly. The relationship between ground points ( EA , IB and IC shown below) can also bechecked this way.I GROUND POINTW–BFAN MAIN Relay5A/C Relay No.25A/C Relay No.35AW–BW–BAW–BA/C Control AssemblyW–BFAN MAIN RelayW–BCigarette Lighter5E3O/D Main SWE3ClockBlower MotorI6W–BW–BAA W–BW–BBlower SWI6AW–BAW–BParking Brake SWE3J1JunctionConnectorW–BRadiator Fan MotorE373BW–BHeadlight Cleaner RelayE2W–BCombination MeterW–BW–BHeadlight LHE4E5W–BW–BE4W–BE5W–BFront Turn Signal Light LHW–BE4W–BW–BFront Fog Light LH33F133GW–BW–BE6Brake Fluid Level SWW–BW–BDoor Lock Control SWW–BB4Cruise Control ECURemote Control Mirror SWTurn Signal Flasher53EW–BFront Clearance Light LH2IA1W–BI213DW–BFront Clearance Light RHW–BFront Fog Light RHW–BE4W–BFront Turn Signal Light RHCombination SW73CW–BHeadlight RHW–B63EW–BI4W–BDefogger SWI2W–BI2Combination SWB4W–BW–BW–B15 W–BW–BB5ID1W–BW–BW–BUnlock Warning SWI510 EA2Door Lock Control RelayW–BI5W–BB4Door Lock Motor RHW–BW–BW–BDoor Courtesy SW RHI5W–BB5EAW–BI48 W–BI8IB1W–BW–BA/C AmplifierDoor Courtesy SW LHB5W–BDoor Lock Control SWB5W–BW–BW–BIdle–Up SWPower Window ControlRelayW–BW–BW–BBlower ResistorPower Window Master SWDoor Lock Motor LHW–B (4A–GZE)443IC3W–BW–BBRRadio and PlayerFuel Control SWI544I5W–BWoofer Speaker AmplifierBRW–B4BRBRI34BRCombination MeterI3BRFuel SenderW–B4BRBRAuto Antenna MotorCombination Meter5BA1W–BHEATER RelayIB ICThe system shown here is an EXAMPLE ONLY. It is different to the actual circuit shown in the SYSTEM CIRCUITS SECTION.82004 COROLLA (EWD533U)

BThe ”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 systemare explained. Since all System Circuit diagrams start from the power source, the power source system must be fullyunderstood.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–BShort Pin227.5A DOME15A EFI30A AM2Battery2Fusible Link Block610A HAZARD220A RADIO NO.1S2Starter10A HORN100A ALT660A ABS5Engine Room R/B (See Page 20)Fuse20A10ASystemPageSTOPABSABS and Traction ControlCruise ControlElectronically Controlled TransmissionMultiplex Communication System194187180166210DOMECigarette LighterCombination MeterHeadlightInterior LightKey Reminder and Seat Belt WarningLight Auto Turn OffTheft Deterrent and Door Lock Control214230112122Power Source40A DOOR LOCK CB1.25B FL MAINWW7.5A DOMEWW22WBB7EB1WI2W1I2BW115A HAZ–RADIOW2WE7284AM126EB1W–RW–RAM27.5A AM2B1TAILRelay2E7B2B4STARTER Relay1324I8Ignition SW4B–W2311W–B231G15A TAILB–WG1220A DEFOGB–Y21W–R1B22W–B2G–WBINJECTION Relay13IG12ACCB–OIG2B2BR11WI250A MAINE7E7W–L1WBattery3 EA2 1 EA1W211WWE615A RAD CIGB–Y1 P–L1The system shown here is an EXAMPLE ONLY. It is different to the actual circuit shown in the SYSTEM CIRCUITS SECTION.92004 COROLLA (EWD533U)

B HOW TO USE THIS MANUALK CONNECTOR LISTI14I15Dark GrayGray112[A]I16J1J2Black2AA1 2AAAA B BD DA A B CC CD DA6 7 8[B]J3J4K1K2L11 21 2Dark GrayAA AA A A A AA B BDDA A B CC CDDL2L3L4M1M21 2 34 56 7 8 9 101112123 45 6 78M31211 23 42M4[D]N1Gray1 2 3[C]BlackGray1117562 3 48 9 10N2O1O2GrayBlackDark Gray1211[A] : Indicates connector to be connected to a part. (The numeral indicates the pin No.)[B] : Junction ConnectorIndicates a connector which is connected to a short terminal.Junction ConnectorJunction connector in this manual include a short terminal which isconnected to a number of wire harnesses. Always performinspection with the short terminal installed. (When installing thewire harnesses, the harnesses can be connected to any positionwithin the short terminal grouping. Accordingly, in other vehicles,the same position in the short terminal may be connected to a wireharness from a different part.)Wire harness sharing the same short terminal grouping have thesame color.Same ColorShort Terminal[C] : Parts CodeThe first letter of the code is taken from the first letter of part, and the numbers indicates its order in parts whichstart with the same letter.[D] : Connector ColorConnectors not indicated are milky white in color.102004 COROLLA (EWD533U)

BL PART NUMBER OF CONNECTORSCodePart NamePart NumberCodeD4Part NameDiode (Courtesy)Part NumberA1A/C Ambient Temp. Sensor90980–11070A2A/C Condenser Fan Motor90980–11237D5Diode (Interior Light)90980–10962A3A/C Condenser Fan Relay90980–10940D6Diode (Moon Roof)90980–1160890980–10848A4A/C Condenser Fan Resistor90980–10928D7Door Lock Control RelayA5A/C Magnetic Clutch90980–11271D8Door Lock Control SW LHA6A/T Oil Temp. Sensor90980–11413D9Door Lock Control SW RH90980–1160890980–11148ABS Actuator[B]90980–11151[C]D10Door Courtesy SW LHA8ABS Actuator90980–11009D11Door Courtesy SW RHA9ABS Speed Sensor Front LH90980–10941D12Door Courtesy SW Front LHA10ABS Speed Sensor Front RH90980–11002D13Door Courtesy SW Front RHA11Airbag Sensor Front LHD14Door Courtesy SW Rear LHA12Airbag Sensor Front RHA13Airbag 15Door Courtesy SW Rear RH90980–11194D16Door Key Lock and Unlock SW LH90980–11070D17Door Key Lock and Unlock SW RH90980–11170[A] : Part Code[B] : Part Name[C] : Part NumberToyota Part Number are indicated.Not all of the above part numbers of the connector are established for the supply.112004 COROLLA (EWD533U)

C TROUBLESHOOTINGTo Ignition SWIG TerminalFuse[A]SW 1Voltmeter[B]VOLTAGE CHECK(a) Establish conditions in which voltage is present at the checkpoint.Example:[A] – Ignition SW on[B] – Ignition SW and SW 1 on[C] – Ignition SW, SW 1 and Relay on (SW 2 off)(b) Using a voltmeter, connect the negative lead to a good groundpoint or negative battery terminal, and the positive lead to theconnector or component terminal.This check can be done with a test light instead of a voltmeter.Relay[C]SolenoidSW 2CONTINUITY AND RESISTANCE CHECK(a) Disconnect the battery terminal or wire so there is no voltagebetween the check points.(b) Contact the two leads of an ohmmeter to each of the checkpoints.OhmmeterSWIf the circuit has diodes, reverse the two leads and checkagain.When contacting the negative lead to the diode positive sideand the positive lead to the negative side, there should becontinuity.When contacting the two leads in reverse, there should be nocontinuity.OhmmeterDiode(c) Use a volt/ohmmeter with high impedance (10 kΩ/Vminimum) for troubleshooting of the electrical circuit.Digital TypeAnalog Type122004 COROLLA (EWD533U)

CTo Ignition SWIG TerminalTest LightFuse CaseShort [A]SW 1Short [B]DisconnectDisconnectLight(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 1 on[C] – Ignition SW, SW 1 and Relay on (Connect theRelay) and SW 2 off (or Disconnect SW 2)(d) Disconnect and reconnect the connectors while watching thetest light.The short lies between the connector where the test lightstays lit and the connector where the light goes out.(e) Find the exact location of the short by lightly shaking theproblem wire along the body.CAUTION:RelayShort [C]DisconnectSW 2FINDING A SHORT CIRCUIT(a) Do not open the cover or the case of the ECU unlessabsolutely necessary. (If the IC terminals are touched,the IC may be destroyed by static electricity.)(b) When replacing the internal mechanism (ECU part) ofthe digital meter, be careful that no part of your body orclothing comes in contact with the terminals of leadsfrom the IC, etc. of the replacement part (spare part).SolenoidDISCONNECTION OF MALE AND FEMALECONNECTORSTo pull apart the connectors, pull on the connector itself, notthe wire harness.HINT : Check to see what kind of connector you aredisconnecting before pulling apart.Pull UpPull UpPress DownPress Down132004 COROLLA (EWD533U)

C TROUBLESHOOTINGHOW TO REPLACE TERMINAL(with terminal retainer or secondary locking device)Reference:1. PREPARE THE SPECIAL TOOL1031HINT : To remove the terminal from the connector, pleaseconstruct and use the special tool or like object shown onthe left.2. DISCONNECT CONNECTOR1Example:(Case 1)0.2(mm)UpTool3. DISENGAGE THE SECONDARY LOCKING DEVICE ORTERMINAL RETAINER.(a) Locking device must be disengaged before the terminallocking clip can be released and the terminal removed fromthe connector.(b) Use a special tool or the terminal pick to unlock the secondarylocking device or terminal retainer.NOTICE:Do not remove the terminal retainer from connector body.Terminal Retainer[A]Terminal RetainerFor Non–Waterproof Type ConnectorHINT : The needle insertion position varies according to theconnector’s shape (number of terminals etc.), socheck the position before inserting it.[Retainer at Full Lock Position]Stopper”Case 1”Raise the terminal retainer up to the temporary lockposition.TerminalRetainer[Retainer at Temporary Lock Position]Example:(Case 2)SecondaryLocking Device”Case 2”Open the secondary locking device.142004 COROLLA (EWD533U)

CToolTabTabExample:(Case 1)[B]TerminalRetainerTool[Male]Access Hole(Mark)ToolFor Waterproof Type ConnectorHINT : Terminal retainer color is differentaccording to connector body.Example:Terminal RetainerBlack or WhiteBlack or WhiteGray or White: Connector Body: Gray: Dark Gray: Black[Female]”Case 1”Type where terminal retainer is pulledup to the temporary lock position (PullType).Insert the special tool into the terminalretainer access hole ( Mark) and pullthe terminal retainer up to thetemporary lock position.HINT : The needle insertion position variesaccording to the connector’s shape(Number of terminals etc.), so checkthe position before inserting it.Retainerat Full Lock PositionRetainerat Temporary Lock Position[Male]Example:(Case 2)[Female]”Case 2”Type which cannot be pulled as far asPower Lock insert the tool straight intothe access hole of terminal retainer asshown.Terminal RetainerToolTool[Male]Press DownPress Down[Female]152004 COROLLA (EWD533U)

C TROUBLESHOOTINGPush the terminal retainer down to the temporary lock position.Retainer atFull Lock PositionRetainer atTemporary Lock Position[Male][Female](c) Release the locking lug from terminal and pull the terminal outfrom rear.Locking LugTool4. INSTALL TERMINAL TO CONNECTOR(a) Insert the terminal.HINT:1. Make sure the terminal is positioned correctly.2. Insert the terminal until the locking lug locks firmly.3. Insert the terminal with terminal retainer in the temporary lockposition.(b) Push the secondary locking device or terminal retainer in tothe full lock position.5. CONNECT CONNECTOR162004 COROLLA (EWD533U)

ABBREVIATIONS DABBREVIATIONSThe following abbreviations are used in this manual.A/C Air ConditioningA/T Automatic TransaxleABS Anti–Lock Brake SystemECU Electronic Control UnitESA Electronic Spark AdvanceEVAP Evaporative EmissionIAC Idle Air ControlIC Integrated CircuitJ/B Junction BlockLED Light Emitting DiodeLH Left–HandM/T Manual TransaxleO/D OverdriveR/B Relay BlockRH Right–HandSFI Sequential Multiport Fuel InjectionSRS Supplemental Restraint SystemSW SwitchTEMP. TemperatureTVIP TOYOTA Vehicle Intrusion ProtectionVSV Vacuum Switching ValveVVT Variable Valve Timingw/ Withw/o Without The titles given inside the components are the names of the terminals (terminal codes) and are not treated as beingabbreviations.172004 COROLLA (EWD533U)

E GLOSSARY OF TERMS AND SYMBOLSGROUNDThe point at which wiring attaches tothe Body, thereby providing a returnpath for an electrical circuit; without aground, current cannot flow.BATTERYStores chemical energy andconverts it into electrical energy.Provides DC current for the auto’svarious electrical circuits.CAPACITOR (Condenser)A small holding unit for temporarystorage of electrical voltage.CIGARETTE LIGHTERAn electric resistance heatingelement.HEADLIGHTSCurrent flow causes a headlight1. SINGLEfilament to heat up and emit light. AFILAMENTheadlight may have either a single(1) filament or a double (2) filament2. DOUBLEFILAMENTCIRCUIT BREAKERBasically a reusable fuse, a circuitbreaker will heat and open if toomuch current flows through it.Some units automatically reset whencool, others must be manually reset.HORNAn electric device which sounds aloud audible signal.DIODEA semiconductor which allowscurrent flow in only one direction.IGNITION COILConverts low–voltage DC currentinto high–voltage ignition current forfiring the spark plugs.DIODE, ZENERLIGHTCurrent flow through a filamentcauses the filament to heat up andemit light.A diode which allows current flow in onedirection but blocks reverse flow only upto a specific voltage. Above that potential,it passes the excess voltage. This acts asa simple voltage regulator.PHOTODIODEThe photodiode is a semiconductorwhich controls the current flowaccording to the amount of light.LED (LIGHT EMITTING DIODE)Upon current flow, these diodes emitlight without producing the heat of acomparable light.DISTRIBUTOR, IIAChannels high–voltage current fromthe ignition coil to the individualspark plugs.METER, ANALOGCurrent flow activates a magneticcoil which causes a needle to move,thereby providing a relative displayagainst a background calibration.FUSEMETER, DIGITALCurrent flow activates one or manyLED’s, LCD’s, or fluorescentdisplays, which provide a relative ordigital display.A thin metal strip which burns throughwhen too much current flows through it,thereby stopping current flow andprotecting a circuit from damage.FUELFUSIBLE LINK(for Medium Current Fuse)(for High Current Fuse orFusible Link)A heavy–gauge wire placed in highamperage circuits which burns through onoverloads, thereby protecting the circuit.The numbers indicate the crosssectionsurface area of the wires.M182004 COROLLA (EWD533U)MOTORA power unit which convertselectrical energy into mechanicalenergy, especially rotary motion.

ERELAYBasically, an electrically operated1. NORMALLY switch which may be normallyCLOSED closed (1) or open (2).Current flow through a small coilcreates a magnetic field which eitheropens or closes an attached switch.SPEAKERAn electromechanical device whichcreates sound waves from currentflow.2. NORMALLYOPENSWITCH, MANUAL1. NORMALLYOPENRELAY, DOUBLE THROWA relay which passes currentthrough one set of contacts or theother.Opens and closescircuits,i it therebyth bstopping (1) orallowing (2) currentflow.2. NORMALLYCLOSEDRESISTORAn electrical component with a fixedresistance, placed in a circuit toreduce voltage to a specific value.SWITCH, DOUBLE THROWA switch which continuously passescurrent through one set of contactsor the other.RESISTOR, TAPPEDA resistor which supplies two ormore different non adjustableresistance values.SWITCH, IGNITIONA key operated switch with severalpositions which allows variouscircuits, particularly the primaryignition circuit, to becomeoperational.RESISTOR, VARIABLE or RHEOSTATA controllable resistor with a variablerate of resistance.Also called a potentiometer orrheostat.SENSOR (Thermistor)A resistor which varies its resistancewith temperature.SWITCH, WIPER PARKAutomatically returns wipers to thestop position when the wiper switchis turned off.SENSOR, SPEEDUses magnetic impulses to openand close a switch to create a signalfor activation of other components.TRANSISTORA solidstate device typically used asan electronic relay; stops or passescurrent depending on the voltageapplied at ”base”.(Reed Switch Type)SHORT PINUsed to provide an unbrokenconnection within a junction block.SOLENOIDAn electromagnetic coil which formsa magnetic field when current flows,to move a plunger, etc.WIRESWires are always drawn as(1) NOTstraight lines on wiringCONNECTED diagrams.Crossed wires (1) without ablack dot at the junctionarejnott joined;j i dcrossed wires (2) with ablack dot or octagonal ( )(2) SPLICEDmark at the junction arespliced (joined)connections.192004 COROLLA (EWD533U)

F RELAY LOCATIONS[Engine Compartment][Body]202004 COROLLA (EWD533U)

F[Instrument Panel]212004 COROLLA (EWD533U)

F RELAY LOCATIONS1: Engine Room R/B: Engine Room J/BEngine Compartment Left (See Page 20)222004 COROLLA (EWD533U)

Memo232004 COROLLA (EWD533U)

F RELAY LOCATIONS: Instrument Panel J/BLower Finish Panel (See Page 21)242004 COROLLA (EWD533U)

F252004 COROLLA (EWD533U)

F RELAY LOCATIONS[Instrument Panel J/B Inner Circuit]262004 COROLLA (EWD533U)

F272004 COROLLA (EWD533U)

F RELAY LOCATIONS3: RH R/B: RH J/BRight Side of the Instrument Panel Reinforcement(See Page 21)282004 COROLLA (EWD533U)

F[RH J/B Inner Circuit]292004 COROLLA (EWD533U)

F RELAY LOCATIONS: Center J/BBehind the Combination Meter (See Page 21)302004 COROLLA (EWD533U)

F[Center J/B Inner Circuit]312004 COROLLA (EWD533U)

G ELECTRICAL WIRING ROUTINGPosition of Parts in Engine CompartmentA 1 A/C Magnetic ClutchA 2 A/T Shift Lever Position SWBack–Up Light SWPark/Neutral Position SWA 3 ABS Speed Sensor Front LHA 4 ABS Speed Sensor Front RHA 5 Airbag Sensor Front LHA 6 Airbag Sensor Front RHA 7 Ambient Temp. SensorF 1 Front Fog Light LHF 2 Front Fog Light RHF 3 Front Parking Light LHFront Turn Signal Light LHF 4 Front Parking Light RHFront Turn Signal Light RHF 5 Front Washer MotorF 6 Front Wiper MotorG 1 GeneratorG 2 GeneratorB 1 Back–Up Light SWB 2 Brake Fluid Level Warning SWCCCC1234HHHHHHCamshaft Position SensorCamshaft Timing Oil Control Valve (VVT)Crankshaft Position SensorCruise Control Actuator123456Headlight LH (High)Headlight LH (Low)Headlight RH (High)Headlight RH (Low)Heated Oxygen Sensor (Bank 1 Sensor 1)HornE 1 Electronically Controlled Transmission SolenoidE 2 Engine Coolant Temp. Sensor322004 COROLLA (EWD533U)

GPosition of Parts in Engine CompartmentIIIIIIIII123456789Idle Air Control ValveIgnition Coil and Igniter No.1Ignition Coil and Igniter No.2Ignition Coil and Igniter No.3Ignition Coil and Igniter No.4Injector No.1Injector No.2Injector No.3Injector No.4P 1 Power Steering Oil Pressure SWP 2 Pressure SWR 1 Radiator Fan MotorR 2 Radiator Fan ResistorS 1 Skid Control ECU with ActuatorS 2 StarterS 3 StarterJ 1 Junction ConnectorT 1 Throttle Position SensorK 1 Knock SensorM 1 Mass Air Flow MeterV 1 Vehicle Speed Sensor (Combination Meter)V 2 VSV (Canister Closed Valve)V 3 VSV (EVAP)N 1 Noise Filter (Ignition)W 1 Washer Level SensorO 1 Oil Pressure SW332004 COROLLA (EWD533U)

G ELECTRICAL WIRING ROUTINGPosition of Parts in Instrument PanelA 8 A/C SWAir Inlet Control SWDefroster Mode Detection SWA 10 A/T Shift Lever IlluminationO/D Main SWA 11 Air Inlet Control Servo MotorA 12 Airbag Sensor AssemblyA 13 Airbag Sensor

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 Elec