Land Rover Defender Workshop Rover Manual
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86ELECTRICAL 4 DESCRIPTION ANDOPERATION ALARM SYSTEM COMPONENT LOCATION COMPONENT LOCATION 1. Electronic controlunit(ECU) Underdash,LHand RHdrive 2. Anti-theft alarmindicator light Instrumentpanel 3. Engine immobilisation warninglight Instrumentpanel 4. Immobilisation spider* Insidevehicle batterybox 5. Passive coil Overstarter switchbarrel 6. Bonnet switch Enginecompartment, LHand RHdrive 7. Doorswitches 8. Ultrasonic sensor Variesaccording tovehicle type 9. Handset andkey 10. Alarm sounder (withoutbatteryback-up) LHinner frontwing 11. Alarm sounder (withbattery back-up) LHinner frontwing * Replaced insome markets byadigital diesel shut-off valve(DDS), secured directlytofuel shut-off solenoid on injection pump.
ELECTRICAL5 DESCRIPTION ANDOPERATION ALARM SYSTEM OPERATION Arming alarm To arm thealarm, aimhandset atvehicle andpress the RH button (Padlock symbol).Provided alldoors and orapertures areclosed, thedirection indicator lamps willflash three times toconfirm thatthealarm is armed. Allsecurity features previously describedwill be active. Once armed, thealarm willsound ifa door orthe bonnet isopened, orifmovement isdetected inside the vehicle. Disarming alarm Within rangeofthe vehicle, brieflypresstheLH (Plain) buttononthe handset; thedirection indicator lamps willflash once toindicate thatthealarm has been disarmed andtheengine re-mobilised. NOTE: Insome territories, theinterior lamps willilluminate whenthealarm is disarmed. If the direction indicators failtoflash when the alarm isarmed: This indicates thatadoor orthe bonnet isnot fully closed, inwhich casethealarm willbepartially armed and engine immobilised, butinterior protection willnot be active. Once theopen doororbonnet isclosed, thedirection indicators willflash three times andthealarm willfully arm asdescribed previously. If the alarm sounds: The vehicle hornandalarm sounder willoperate continuously for30seconds whenthealarm is triggered. Thehorn andalarm sounder canbe triggered uptothree times. To silence thealarm, presseither handset button.If the handset isinoperative, thealarm canonly be disarmed byentering theemergency keyaccess code, seeEngine immobilisation override. Anti-theft alarmindicator light A RED indicator lightonthe instrument panel indicates thestatus ofthe alarm system. Whenthe alarm isarmed successfully, thelight flashes rapidly. After 10seconds, thelight adjusts toaslower frequency andcontinues flashingasan anti-theft deterrent. If the light failstoilluminate duringtherapid flash phase, thisindicates amislock (doororthe bonnet not fully closed orkey instarter switch). Ifthis occurs, the indicator lightwillstill flash atslower frequency as an anti-theft deterrent. The indicator lightwillilluminate continuously under the following conditions: 1. Alarm system armedandimmobilised with ignition onordrivers dooropen. 2. Engine immobilised withignition onordrivers door open. Interior protection Interior protection isactivated automatically whenthe alarm system isarmed; twinsensors insidethe vehicle monitor interiorspaceandwillactivate the alarm ifan intrusion isdetected. However, ifpassengers oranimals aretobe left inside the vehicle, orifa window orsunroof isto be left open, thealarm mustbearmed withtheinterior protection DISABLED asfollows: To disable interiorprotection: 1. Open thedrivers door. 2. Use thehandset toarm thealarm innormal way. 3. Close thedrivers door(thedirection indicator lamps willflash three times andtheanti-theft indicator lightcommences flashingrapidly). The alarm system isnow armed withtheinterior protection disabled. NOTE:Interior protection willnotoperate until 15seconds afterthealarm isset.
86ELECTRICAL 6 DESCRIPTION ANDOPERATION ENGINE IMMOBILISATION Engine immobilisation isan important aspectofthe vehicles securitysystem,andoccurs automatically whenever thealarm system isarmed. The system alsoincludes afeature knownaspassive immobilisation, whichisdesigned tosafeguard thevehicle fromtheftshould thedriver forget toarm the alarm. Passive immobilisation occursautomatically as follows: Thirty seconds afterthestarter switchhasbeen turned offand thedrivers dooropened. Fiveminutes afterthestarter switchisturned offor the alarm system isdisarmed. If the engine hasimmobilised passively, re-mobilisation willoccur whenthestarter switchis turned toposition II,provided thehandset ison the same ringaskey and inclose proximity tothe switch. ALWAYS keepthehandset onthe same ringasthe key. NEVER attachbothhandsets tothe same keyring. Any attempt tostart theengine whileitis immobilised will cause theengine immobilisation warninglightto flash.Engine immobilisation override If the handset islost orfails tooperate, theengine immobilisation canbeoverridden byusing thestarter key toenter thefour digit emergency accesscode. The procedure forentering thecode isdescribed after the following note: NOTE:Ifthe handset islost orinoperative, it is impossible todisarm thealarm. As soon asthe door isopened, thealarm will sound (continuously foruptothree 30second periods), andcontinue whilethecode isbeing entered. 1. With thedrivers doorclosed, insertthekey into the starter switch. 2. Turn theswitch toposition IIthe required number oftimes toenter firstdigit ofcode (iffirst digit is4, turn keytoposition IIand then back to 0 four times. 3. Open thedrivers door(toenter firstdigit) and then close thedoor again. 4. Turn thestarter switchtoposition IIand back to 0 the required numberoftimes toenter SECOND digitofcode. 5. Open thedrivers door(toenter second digit) and then close thedoor again. 6. Turn thestarter switchtoposition IIand back to 0 the required numberoftimes toenter THIRD digit ofcode. 7. Open thedrivers door(toenter thirddigit) and then close dooragain. 8. Turn thestarter switchtoposition IIand back to 0 the required numberoftimes toenter FOURTH digitofcode. 9. Finally, openandclose thedrivers door.Ifthe code hasbeen entered correctly, theanti-theft indicator lightwillextinguish, theengine canbe started andthealarm willdisarm. If an incorrect codehasbeen entered: If the code isentered incorrectly, theanti-theft indicator lightwillcontinue toilluminate andthe engine willfailtostart. Before entering thecode again, turn thestarter switchtoposition II,hold inthis position for5seconds andthen switch off. After three failed attempts, thesecurity system invokes adelay period ofthirty minutes duringwhich the system willnot accept anyfurther codes.
ELECTRICAL7 DESCRIPTION ANDOPERATION ALARM SYSTEM FUSES When thevehicle immobilisation andalarm system is fitted, threefuses areused toprotect thecircuit: Alarm system 15amp fuse, mainharness, located behind instrument binnacle. Alarmsounder 20amp fuseNo.10, located inmain fuse box. Alarm system 5amp fuseNo.20, located inmain fuse box. The main fuseboxispositioned inthe centre ofthe fascia, infront ofthe main gearlever. Alabel inthe fuse boxcover shows thecircuits protected, thefuse rating andtheir locations. Theyarealso listed below. MAIN FUSE BOX Fuse No. Value(amps) Electricalcircuit 1 15 Hazardwarning lights 2 20 Interiorlamp,horn 3 15 Wipers&washers -rear 4 10 Wipers&washers -front 5 15 Heater 6 7.5Rearfogguard lamps 7 5Radio/cassetteplayer 8 15 Heatedrearwindow 9 10 Cigarlighter 10 20Alarmsounder 11 7.5Headlamp-RH, dipped beam 12 7.5Headlamp-LH, dipped beam 13 7.5Headlamp-RH, main beam 14 7.5Headlamp-LH, main beam 15 5Sidelamps -LH 16 5Sidelamps -R H 17 15Stop&reverse lamps 18 20Airconditioning 19 5Airconditioning 20 5Alarmsystem
ELECTRICAL9 DESCRIPTION ANDOPERATION IMMOBILISATION ANDALARM SYSTEM CIRCUIT DIAGRAM 1. Anti-theft alarmindicator light(LED) 2. Engine immobilisation warninglight 3. Alarm system fuse-15 amp 4. Alarm sounder relay 5. Under bonnet lighting fuse 6. Alarm sounder (withoutbatteryback-up) 7. Alarm system fuse-5 amp (position 20) 8. Electronic controlunit(ECU) 9. Bonnet switch 10. Alarm sounder protection fuse-20 amp (position 10) 11. Starter switch 12. Under bonnet ignition fuse 13. Drivers doorswitch 14. Vehicle hornswitch 15. Vehicle horn 16. Passive coil 17. Starter switchrelay 18. Front passenger doorswitch 19. Hazard warning lightfuse -15 amp (position 1) 20. Ultrasonic sensor 21. Interior lampandhorn fuse-20 amp (position 3) 22. Alarm sounder (withbattery back-up) 23. LHdirection indicatorlamps 24. RHdirection indicatorlamps 25. Interior lamp 26. Immobilisation spider 27. Rear sidedoors andrear door switches 28. Diagnostic connector 29. Diagnostic fuse-7.5 amp 30. Starter solenoid 31. Fuel switch-off solenoid(injection pump) 32. Generator 33. Aerial Key tocable colours B-Black G-GreenK-PinkLG-Light Green N-BrownO-OrangeP-PurpleR-RedS-SlateU-BlueW-WhiteY-Yellow The lastletter ofacolour codedenotes thetracer colour
ELECTRICAL11 DESCRIPTION ANDOPERATION IMMOBILISATION ANDALARM SYSTEM CIRCUIT DIAGRAM -WITH DDS 1. Anti-theft alarmindicator light(LED) 2. Engine immobilisation warninglight 3. Alarm system fuse-15 amp 4. Alarm sounder relay 5. Under bonnet lighting fuse 6. Alarm sounder (withoutbatteryback-up) 7. Alarm system fuse-5 amp (position 20) 8. Electronic controlunit(ECU) 9. Bonnet switch 10. Alarm sounder protection fuse-20 amp (position 10) 11. Starter switch 12. Under bonnet ignition fuse 13. Drivers doorswitch 14. Vehicle hornswitch 15. Vehicle horn 16. Passive coil 17. Starter switchrelay 18. Front passenger doorswitch 19. Hazard warning lightfuse -15 amp (position 1) 20. Ultrasonic sensor 21. Interior lampandhorn fuse-20 amp (position 3) 22. Alarm sounder (withbattery back-up) 23. LHdirection indicatorlamps 24. RHdirection indicatorlamps 25. Interior lamp 26. Digital dieselshut-off valve(DDS) 27. Rear sidedoors andrear door switches 28. Diagnostic connector 29. Diagnostic fuse-7.5 amp 30. Starter solenoid 31. Fuel shut-off solenoid (injection pump) 32. Generator 33. Aerial Key tocable colours B-Black G-GreenK-PinkLG-Light Green N-BrownO-OrangeP-PurpleR-RedS-SlateU-BlueW-WhiteY-Yellow The lastletter ofacolour codedenotes thetracer colour
86ELECTRICAL 12 DESCRIPTION ANDOPERATION VEHICLE ALARMSYSTEM BUILT-IN TEST NOTE:Thehandset shouldbedetached from thekey toallow perimetric testingof the alarm system. Thesystem will automatically switchtovolumetric testingifthe handset isin close proximity tothe starter switch. The built-in testprocedure canbeaccessed providing the following conditions exist: Alarm disarmed. Ignition off. Doors unlocked. Bonnet closed. With assistance, thetest mode canbeentered by completing thefollowing instructions within5seconds: 1. Open bonnet. 2. Turn starter switchon. 3. Open drivers door(farenough toactivate door switch). 4. Turn starter switchoff. 5. Turn starter switchon. If the test mode hasbeen correctly accessed, the alarm sounder/horn willoperate brieflyandthe anti-theft alarmindicator anddirection indicatorlamps will flash. Perimetric tests The anti-theft alarmindicator lightanddirection indicator lampswillflash when: 1. Door switches areactivated. 2. The bonnet isopened. 3. Key switches areactivated. Volumetric tests Press theLH(unlock) buttonormove thehandset close tothe starter switchtodisable perimetric testing and enable volumetric testing.Ifmovement is detected withinthevehicle bythe ultrasonic sensor the anti-theft alarmindicator anddirection indicator lamps willilluminate. NOTE: Exittheanti-theft alarmbuilt-in test by turning thestarter switch tothe off position. If the previously describedconditions arenotachieved during thebuilt-in testprocedure, thiswould indicate a fault inthe alarm system. Beforeundertaking detailed fault diagnosis procedures, firstmake visual checks of components suchasafaulty doorswitch orblown alarm system fuse.
ELECTRICAL1 FAULT DIAGNOSIS GENERAL INFORMATION Detailed information ofelectrical systems, component locations andcircuit diagrams arecovered inthe Defender ElectricalTroubleshooting Manual. This section coverschecks ofthe charging system. GENERATOR TESTING Service repairno-86.10.01 Charging systemcheck 1. Check battery isin good condition, withanopen circuit voltage ofatleast 12.6V.Recharge or substitute batterytocarry outtest. 2. Check drivebeltcondition See SECTION 10, Maintenance, Underbonnet maintenance. 3.Check battery connections areclean andtight. 4. Check generator connections areclean and tight. 5. Ensure thereisno drain onbattery from,for example, interiororexteriorlamps. Generator test Following instructions refertouse ofsuitable test equipment usingacarbon pilerheostat. 6. Connect testequipment referringto manufacturers instructions. 7. Start engine andrunat3000 rev/min without accessory load. 8. Rotate carbon pileload control toachieve greatest output(amps) without allowing voltage to fall below 12.0V.Areading inamps, of generator outputshould beobtained. 9. Run engine at3000 rev/min, switchselector to regulator test,read voltmeter. Areading of13.6 to 14.4 Vshould beobtained. 10. Switch selector todiode/stator test,switch on headlamps toload generator. Raiseengine speed to3000 rev/min, readvoltmeter, needle must bewithin OKrange. TESTING INPOSITION Charging circuitresistance test. 1. Connect alow range voltmeter between generator terminalmarkedB+and positive terminal ofbattery. 2. Switch onheadlamps, startengine. Runengine at approximately 3000rev/min. Notevoltmeter reading. 3. Transfer voltmeter connections toframe of generator andnegative terminalofbattery, and again notevoltmeter reading. 4.Ifreading exceeds 0.5volt onpositive sideor 0.25 voltonnegative side,there isahigh resistance incharging circuitwhichmustbe traced andremedied.