Land Rover Defender Electrical Library Elld970e Rover Manual
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DEFENDER90,110, 130 Electrical Library ThisManual shouldbeused inconjunction withthefollowing publications: LRL 0097ENG WorkshopManual LRL 0125ENG ElectricalCircuitDiagrams Publication PartNo.LRL 0126ENG Published byRover Technical Communication Ó 1997 Rover Group Limited
CONTENTS DEFENDER 97MY 1. INTRODUCTION ELECTRICAL PRECAUTIONS 1.3 .......................................................... ABBREVIATIONS 1.6 ............................................................................... HOW TOUSE THIS DOCUMENT 1.7 ..................................................... WIRE COLOUR CODES 1.10 .................................................................. 2. FUSE DETAILS INTRODUCTION 2.1 ................................................................................ Engine Compartment FuseBox 2.1 ......................................................... Passenger Compartment FuseBox 2.2 ................................................... 3. EARTH POINTS ANDHEADER JOINTS Earth Points 3.1 ........................................................................................ Earth Headers 3.2 .................................................................................... 4. DESCRIPTION ANDOPERATION ENGINE IMMOBILISATION ANDALARM SYSTEM (IFFITTED) 4.1 ..... CHARGING ANDSTARTING -DIESEL 4.6 ............................................. CHARGING ANDSTARTING -V 8 4.9 ..................................................... HEATER BLOWER 4.12 .......................................................................... HEATED REARWINDOW (HRW) 4.13 ................................................... WIPERS ANDWASHERS 4.14 ................................................................ EXTERIOR LAMPS-Brake andReverse Lamps 4.18 ............................ EXTERIOR LAMPS-Head, SideandNumber PlateLamps 4.19 ........... EXTERIOR LAMPS-Rear FogLamps 4.22 ............................................ INDICATORS /HAZARD WARNING LAMPS 4.23 .................................. INTERIOR LAMPS 4.26 ........................................................................... Continued.....
CONTENTSDEFENDER97MY INTERIOR ILLUMINATION 4.31 .............................................................. INSTRUMENTS 4.32 ................................................................................ CLOCK 4.34 ............................................................................................. IN-CAR ENTERTAINMENT 4.35 .............................................................. CIGAR LIGHTER 4.36 .............................................................................. 5. CONNECTOR Indexedbyconnector number ........................................
INTRODUCTION DEFENDER 97MY 1.1 This document isintended toassist indiagnosing electricalfaults,andshould be used inconjunction withtheElectrical CircuitDiagrams. Thedocument is divided intothefollowing sections: 1. INTRODUCTION -includes Electrical Precautions, alist ofAbbreviations and general information onhow touse thedocument. 2. FUSE DETAILS -provides detailsoflocation, ratinginAmps, wirecolour and circuit(s) protected. 3. EARTH POINTS ANDHEADER JOINTS-provides detailsofearth points, earthandpower header joints,including aplan view ofthe vehicle to aid location. 4. DESCRIPTION ANDOPERATION -provides anexplanation ofhow each of the systems operate. 5. CONNECTOR -details ofconnectors includingalocation photograph, face view andpin-out table. NOTE: Before starting electrical checksonthe vehicle, ensurethat the relevant mechanical functionsoperatesatisfactorily. References References tothe LHorRH side given inthis document aremade when viewing thevehicle fromtherear. Operations coveredinthis document donot include reference totesting the vehicle afterrepair. Itis essential thatwork isinspected andtested after completion and,ifnecessary, aroad testofthe vehicle undertaken, particularly where safetyrelated itemsareconcerned. CAUTION: Beforeundertaking anyelectrical workonavehicle ALWAYS readtheELECTRICAL PRECAUTIONS detailedonthe next page.
INTRODUCTION 1.2DEFENDER97MY Battery Voltage Before commencing diagnosisofelectrical problems verifythecondition ofthe battery isacceptable byusing theopen circuit voltage test. Opencircuit voltage test 1.Switch offallelectrical loadsonthe vehicle. 2. Adjust digitalmultimeter toread dcvolts onthe appropriate scale. 3. Connect testprobes acrossbattery terminals ensuringthatpolarity is correct andrecord thevoltage displayed. Areading of12.3V ormore isacceptable; anybattery whichreadsless than thiswillneed charging. NOTE: Ifthe vehicle hasbeen usedwithin aperiod of8hours prior to the test, surface chargemustberemoved fromthebattery by switching theheadlamps onfor approximately 30seconds. Waita further 60seconds beforechecking theopen circuit voltage. Battery voltage isused asaknown reference forascertaining whetherornot circuits arereceiving sufficiently highvoltage forcomponents tofunction correctly. Thisreference isonly aguide sincemostelectronic circuitsare designed tofunction overawide range ofvoltages. Inaddition, consideration must begiven toreadings affectedbyvoltage dropacross certain components and fluctuations duetocable lengths.
INTRODUCTION DEFENDER 97MY 1.3 ELECTRICAL PRECAUTIONS General The following guidelines areintended toensure thesafety ofthe operator whilst preventing damagetothe electrical andelectronic components fittedtothe vehicle. Wherenecessary, specificprecautions aredetailed inthe relevant sections ofthis document, referencetowhich should bemade priorto commencing repairoperations. Equipment -Prior tocommencing anytestprocedure onthe vehicle ensurethat the relevant testequipment isworking correctly andanyharness orconnectors are ingood condition. Thisparticularly appliestomains leadandconnections. WARNING: Beforecommencing workonanignition systemallhigh tension terminals, adaptersanddiagnostic equipment fortesting should beinspected toensure thatthey areadequately insulated and shielded toprevent accidental personalcontactandtominimize the risk ofshock. Wearers ofsurgically implanted pacemaker devicesshould not work inclose proximity toignition circuitsordiagnostic equipment. Polarity-Never reverse connect thevehicle batteryandalways observe the correct polarity whenconnecting testequipment. High Voltage Circuits-Whenever disconnecting livehtcircuits alwaysuse insulated pliersandnever allowtheopen endofthe htlead tocome into contact withother components particularlyECUs.Sincehighvoltage spikes can occur onthe terminals ofthe coil while theengine isrunning, exercise caution whenmeasuring thevoltage atthese points.
INTRODUCTION 1.4DEFENDER97MY Connectors andHarness -The engine compartment ofavehicle isa particularly hostileenvironment forelectrical components andconnectors. Always ensuretheseitemsaredryand oilfree before disconnecting and connecting testequipment. Neverforceconnectors aparteither byusing tools or by pulling onthe wiring harness. Alwaysensurelocking tabsaredisengaged before removal andnote orientation toenable correct reconnection. Ensure that anyprotective coversandsubstances arereplaced ifdisturbed. Before removing afaulty component, refertothe Workshop Manualforremoval procedures. Ensurethestarter switchisturned tothe OFF position, the battery isdisconnected (seeBattery disconnecting) andanydisconnected harnesses aresupported toavoid anyundue strainatterminals. When replacing thecomponent keepoilyhands awayfromelectrical connection areas andpush connectors homeuntilanylocking tabsfullyengage. Battery disconnecting Before disconnecting thebattery, switchoffallelectrical equipment. Ifthe radio is to be serviced, ensurethesecurity codehasbeen deactivated. CAUTION: Toprevent damage toelectrical components ALWAYS disconnect thebattery whenworking onthe vehicle electrical system. Theearth leadmust bedisconnected firstandreconnected last. Always ensurethatbattery leadsarerouted correctly andarenot close toany potential chafingpoints. Batterycharging Recharge thebattery outofthe vehicle andkeep thetopwell ventilated. While being charged ordischarged, andforapproximately fifteenminutes afterwards, batteries emithydrogen gas.Thisgasisinflammable. Always ensureanybattery charging areaiswell ventilated andthatevery precautions istaken toavoid naked flames andsparks.
INTRODUCTION DEFENDER 97MY 1.5 Disciplines Switch offignition priortomaking anyconnection ordisconnection inthe system aselectrical surgecaused bydisconnecting liveconnections can damage electronic components. Ensure handsandwork surfaces areclean andfree ofgrease, swarf,etc.as grease collects dirtwhich cancause tracking orhigh-resistance contacts. When handling printedcircuitboards, treatthem asyou would abrake disc- hold bythe edges only;notethatsome electronic components aresusceptible to body static. Connectors shouldneverbesubjected toforced removal orrefit, especially inter-board connectors, damagedcontactswillcause short-circuit andopen- circuit conditions. Prior tocommencing test,andperiodically duringtest,touch agood earth, i.e. cigar lighter socket, todischarge bodystatic assome electronic components are vulnerable tostatic electricity. Grease forelectrical connectors All under bonnet andunder bodyconnectors areprotected againstcorrosion by the application ofaspecial greaseonproduction. Shouldconnectors be disturbed inservice orrepaired orreplaced, agrease ofthis type, available under PartNo.BAU 5811, should againbeapplied. NOTE: Theuseofother greases mustbeavoided asthey can migrate intorelays, switches etc.contaminating thecontacts and leading tointermittent operationorfailure.
INTRODUCTION 1.6DEFENDER97MY ABBREVIATIONS A -Amps ac -Alternating current A/C orAircon -Air conditioning BBUS -Battery backed upsounder Cav -Cavity Cct -Model orfeature applicability Col -Colour dc -Direct current ECU -Electronic controlunit ECM -Engine controlmodule EGR -Exhaust gasrecirculation EKA -Emergency keyaccess HRW -Heated rearwindow IACV -Idle aircontrol valve ICE -In-car entertainment LED -Light emitting diode LH -Left hand LHD -Left hand drive Link -Fusible link MFi -Multiport fuelinjection RF -Radio frequency RH -Right hand RHD -Right handdrive RWW -Rear wash wipe SFi -Sequential fuelinjection TP -Throttle position sensor V -Volts