ECO mode LAND ROVER FRELANDER 2 2006 User Guide

Not s ens it ive to brake tes ti ng on a chas si s dynamomet er.
Generati on 4 Acti ve On-Demand Coupli ng - Vehicles from 2009MY
The generati on 4 coupl ing does not have the di fferenti al s peed dri ven pump used on the previ ous generat ion 3coupl ing, but i s fit ted wi th a bigger capacit y electrically operated axial pump and a hi gh pres s ure accumul ator.The proport ional throt t le valve and press ure s ens or on t he generat ion 3 coupli ng is replaced wit h a proport ionalpres s ure reducing val ve.The t orque li mit er pres sure reducing valve on the generat ion 3 coupli ng is replaced by an electroni c cont rol valveand cont rol ling software.
The generati on 4 acti ve on-demand coupli ng gives t he fol lowing improvements over t he previous generati on 3 coupl ing:
Reduced bas e t orque at high different ial s peedsTorque acti vat ion i s now i ndependent of different ial s peedAccurat e t orque l imi ter cont rolEnergy s tored in hi gh pres s ure accumul ator givi ng a low maximum current consumpt ion of t he electric pump andfas t er res pons e.
Control Module - G eneration 3 and 4 Couplings
The cont rol module, at tached to the cas ing of t he act ive on-demand coupling, forms a s ingle unit wit h t he cont rolvalve/axial s ol enoi d. By anal yzi ng informat ion from other vehi cl e modules and s ensors t he cont rol module regul ates t heaxial sol enoi d t o cont rol t he hydraul ic flui d pres s ure s uppl ied t o t he clut ch pl ates. Some of t he modul es and s ens ors thecont rol module communi cat es wit h are li s ted below:
Hardwi red:- Control valve / axi al s olenoid- Electric hydrauli c pump- Oi l press ure and temperat ure sens orHigh speed CAN (cont rol ler area net work):- Engine cont rol module- Anti -l ock brake s ys t em / t racti on cont rol module- Tracti on res ponse swit ch- Y aw rate sens or- Steering wheel rot at ion sens or
The axial sol enoi d cons t ant ly adjust s t he cont rol valve output us ing a Pul se W i dt h Modulat ion (PW M) s i gnal. The flui dpres s ure deli vered t o t he cl utch plat es determines t he amount of t orque t hat is delivered t o t he rear axl e.
The act ive on-demand coupli ng has int egrated oi l press ure and temperature s ens ors to enable the control modul e t oaccurat ely manage t he t orque t ransfer under all environment al and operat ing condit ions . Usi ng thes e s ignals the controlmodule will us e s t rategi es to protect the coupli ng from overheati ng; in extreme cas es to protect t he coupli ng from damaget he coupli ng wil l dis engage i f the t emperat ure of t he hydraul ic flui d exceeds 105°C. The coupl ing wi ll ret urn to normalfuncti onal it y when t he temperat ure fall s below 101°C.
The cont rol module has an int egrated di agnos ti cs sys tem, whi ch cons tant ly moni tors the act ive on-demand couplings ys t em as wel l as it s input and output s ignals . If t he control modul e detects a fault a Diagnost ic Troubl e Code (DTC) i ss tored. The DTC is acces s ed usi ng t he Land Rover approved di agnos t ic s yst em.
Electric Hydraulic Pump
W hen negoti ati ng very low frict ion s urfaces s uch as wet gras s , snow or i ce; i nit ial wheel -s pin can cut i nt o t he s urface andreduce gri p. W it h a re-act ive on-demand coupl ing, almos t 60 degrees of wheel rotat ion woul d occur before torque could bet ransmit ted t hrough t he coupl ing.
On Generat ion 3 coupli ngs , t o count eract thi s Land Rover devel oped a uni que high-pres s ure pre-charge faci li ty whi chenergizes t he hydraul ic circui t as s oon as the engi ne is s t art ed. Es s ent ial ly an el ect ri cal ly operat ed hydraul ic pump wasdesi gned to maintai n a pot ent ial of 500 Nm (369 l b ft ) of t orque pres s ure wi thi n the coupli ng. (This pre-charge t orquecapacit y has been increas ed to 1500Nm (1106 l b ft ) for t he Generat ion 4 coupli ng.)
Vehicles fit ted wi th Terrai n Res pons e als o add furt her benefi ts by varying t he level of pre-charge t o deli ver opti mumt racti on over a range of di fferent t errai n s urfaces . The level of pre-charge is varied dependi ng on t he part icul ar terrainres ponse mode, for exampl e:
Terrai n respons e in 'Speci al Programs Off' mode as common wit h vehi cl es wit hout terrain res pons e, the coupli ng isprogrammed t o transmit 500 Nm 369 lb ft of t orque on Generat ion 3 couplings and 1500 Nm (1106 l b ft) of t orqueon Generat ion 4 couplings t o t he rear axle when the vehicle moves from res t i n a s t raight l ine. Thi s s trategymi ni mi zes t ract ion l os s from a s t andi ng-s tart regardles s of t he terrain. W hen the vehicle accelerat es the pres surein the coupling is decreas ed to improve fuel economy.The abili ty to sens e t he s teeri ng angl e all ows t he coupli ng t o be programmed t o provide no torque trans fer t hrought he coupli ng. This prevent s t he coupli ng locking when t he vehicle i s maneuvring at low s peeds and acute s teeri ngangl es.In 'Grass / Gravel / Snow' mode t he coupl ing i s programmed to maint ai n i ts pre-charge s t at e unt il much highers peeds are obtained. The s ame applies even i f the vehicle is t raveli ng at low speeds and acut e s t eering angles , ast racti on takes precedence over coupli ng lock-up on l ow-fri ct ion s urfaces .
For addit ional informat ion, refer t o: Ride and Handli ng Opti mizat ion (204-06 Ride and Handli ng Opt imi zat ion, Descripti onand Operat ion).
Mechanical Hydraulic Pump - Generation 3 Couplings - Vehicles up to 2009MY
The dri ves haft i s att ached t o t he coupl ing's front clut ch pl ate as s embly (i nput ), with the rear cl ut ch plat e as sembl yconnected t o t he different ial pini on (out put ). A s was h-pl ate wit h 6 hydrauli c rol lers is al so att ached t o t he different ialpinion. W hen there is no s peed difference bet ween the coupling's input and out put, the rol lers do not funct ion.

The parking brake is a manual ly appli ed cabl e s ys t em t hat operates brake s hoes, housed wit hin the i nner diamet er of eachrear brake di sc.
FRONT AND REAR DISC BRAKES
The 3.2L i 6 vehicle i s ins t al led wit h vent il ated front and rear brake di scs . The 2.2L TD4 vehicle is i nst all ed wit h venti latedfront and sol id rear brake dis cs. Bot h t he i6 and TD4 vehicl es feature s ingle pi s ton, s lidi ng cal ipers on all brake dis cs . Foraddi ti onal i nformat ion, refer to:
Front Dis c Brake (206-03 Front Di sc Brake, Des cri pt ion and Operati on),Rear Di sc Brake (206-04 Rear Di s c Brake, Des cri pti on and Operati on).
PARKING BRAKE
The parking brake is a manual ly appli ed, cable operat ed s yst em. The RH and LH rear brake dis cs form the parki ng brakedrums , and provide the l ocat ion for the parki ng brake s hoes and components .For addit ional informat ion, refer t o: Parking Brake (206-05 Parki ng Brake and Act uat ion, Descripti on and Operat ion).
HYDRAULIC BRAKE ACTUATION
Hydrauli c brake act uati on cons is t s of the brake pedal , mast er cyl inder, HCU, and t he connect ing hydraul ic pipes and hos es.
The t andem brake mas ter cylinder wit h reservoi r is at tached to, and operat ed by t he brake boos t er. The brake mas t ercyl inder is a tandem des ign t hat suppli es pres s ure t o 2 i ndependent (pri mary and secondary) hydraul ic circui ts .For addit ional informat ion, refer t o: Hydraulic Brake Actuati on (206-06 Hydraulic Brake Act uati on, Des cri pt ion andOperat ion).
BRAKE BOOSTER
The brake boost er is vacuum operat ed and provides power as s is t ance t o t he brake hydrauli c s ys t em. The boos t er i s oft andem des ign that incorporat es 2 s eparate diaphragms . On both the gas oline and di esel models , t he vacuum required forboos t er operat ion is produced by an engine driven, vacuum pump.For addit ional informat ion, refer t o: Brake Boos ter (206-07 Power Brake Act uati on, Des cript ion and Operat ion).
ANTI-LOCK CONTROL
The anti -l ock control sys tem feat ures a Cont inental Teves Mk25E1 ABS module wit h i ntegral 4 channel HCU. The ABSmodule and HCU provide brake sys tem monit ori ng, and acti ve brake funct ions t o cont rol t he vehi cl e s tabil it y and t racti on.The ABS module al s o provides s peci fi c functi ons to as s is t t he vehi cl e duri ng off-road drivi ng.
The anti -l ock control sys tem provides t he fol lowing funct ions :
Anti -l ock Brake Sys t em (ABS)Corner Brake Control (CBC)Dynamic St abi li ty Cont rol (DSC)Electroni c Brake Force Di s tributi on (EBD)Electroni c Tracti on Control (ETC)Emergency Brake As s is t (EBA)Engi ne Drag-Torque Control (EDC)Hil l Descent Cont rol (HDC) wit h gradi ent release cont rolRoll Stabi lit y Control (RSC)Terrai n Res pons e™ sys tem int egrati on.
For addit ional informat ion, refer t o: Anti -Lock Cont rol - St abi li ty As s is t (206-09C Anti -Lock Cont rol - St abi lit y As s is t,Des cript ion and Operat ion).

brake boos ter.
5. Operate the engine for a minimum of 10 s econds at a fast i dle. Stop the engine and al low t he vehicle t o s t andfor 10 mi nut es. Then, appl y the brake pedal wi th approxi mately 89 N (20lb) of force. The pedal feel (brakeappli cat ion) s houl d be t he s ame as t hat not ed wit h t he engine runni ng. If the brake pedal feel s hard (no poweras s is t), ins t al l a new valve and t hen repeat t he tes t. If t he brake pedal s t ill feels hard, i ns t all a new brakeboos ter. If t he brake pedal movement feel s s pongy, bleed t he brake s ys t em.REFER t o: Brake Syst em Bl eedi ng (206-00 Brake Syst em - General Informati on, General Procedures ) /Brake Sys t em Pres s ure Bl eedi ng (206-00 Brake Syst em - General Informati on, General Procedures ).
5.
Brake Master Cylinder
Us ual ly, t he fi rs t and s tronges t indicat or of anything wrong i n t he brake s ys t em i s a feeling through t he brake pedal. Indiagnosi ng the condit ion of t he brake mas t er cyli nder, check pedal feel as evidence of a brake concern. Check for brakewarni ng lamp ill uminat ion and t he brake fluid level i n t he brake mas t er cyli nder reservoi r.
Normal Condit ions
The fol lowing condit ions are cons idered normal and are not i ndi cat ions t hat t he brake mast er cyl inder i s i n need of repair.
Modern brake sys tems are des igned t o produce a pedal effort that is not as hard as in the pas t . Compl aint s of lightpedal effort s s houl d be compared t o t he pedal efforts of another vehi cl e of t he s ame model and year.The fl uid l evel wi ll fal l wit h brake pad wear.
Abnormal Condi ti ons
Changes i n t he brake pedal feel or brake pedal travel are indicators t hat s omet hi ng coul d be wrong in the brake sys tem.The diagnost ic procedure and techni ques us e brake pedal feel , warning i ndi cat or il lumi nat ion and l ow brake flui d level asindicat ors t o diagnosi ng brake s yst em concerns . The foll owing condi ti ons are consi dered abnormal and indi cat e t hat t hebrake mas t er cyli nder i s in need of repai r:
• NOTE: Pri or to carrying out any diagnosi s , ens ure the brake sys tem warni ng indicator i s functi onal .
Brake pedal goes down fast . This could be caus ed by an external or int ernal leak.Brake pedal goes down s l owl y. Thi s coul d be caused by an int ernal or external l eak.Brake pedal is l ow or feels spongy. Thi s condit ion may be caus ed by no fl ui d i n the brake mas ter cylinder, reservoi rcap vent holes cl ogged or air i n t he hydraul ic s ys tem.Brake pedal effort is excess ive. This may be caus ed by a bi nd or obs t ructi on in the pedal/li nkage, a faul tynon-ret urn val ve, boost er or ins ufficient boos t er vacuum.Rear brakes lock up during light pedal force. Thi s may be caus ed by damaged brake pads , a parti ally appl ied parkingbrake, a damaged ABS s ens or or bearing fail ure.Brake pedal effort errat ic. This condit ion could be caus ed by the brake boos t er or incorrectl y ins tal led brake pads .Brake warning i ndi cat or is on. This may be caus ed by low fl uid l evel or fl oat as s embly damaged.
Non Pressure Leaks
Any reduced fl uid volume in t he brake mast er cyl inder res ervoi r may be caused by two types of none pres sure externalleaks .
Type 1: An ext ernal leak may occur at the brake mast er cyl inder res ervoir cap because of incorrect posi ti oning of t hegasket and cap. Repos it ion cap and gasket .
Type 2: An ext ernal leak may occur at the brake mast er cyl inder res ervoir mounti ng seal s. Repair s uch a l eak by ins tall ingnew s eals and make s ure that t he brake mas t er cyli nder reservoi r ret ai ning bolt i s correct ly i nst all ed.

ItemPart NumberDescription
1-Brake pipe t o LH front cali per2-ABS modul e
3-Brake pipe t o RH front cali per
4-Mas t er cyli nder primary circuit connect ion5-Brake pipe t o LH rear cal iper
6-HCU
7-Brake pipe t o RH rear cal iper8-Mas t er cyli nder s econdary ci rcuit connect ion
The HCU i s located on the rear LH s ide of t he engi ne compartment and i s an i nt egral component wit h t he ABS module. TheHCU i s a 4 channel uni t that modulat es the s upply of hydrauli c pres sure t o t he brakes under t he cont rol of the ABSmodule.
The pri mary and secondary outl et ports of t he mas ter cyli nder are connect ed via 8 mm (0.315 in) diamet er brake pipes t ot he primary and s econdary ci rcuit s of the HCU. The primary circui t in t he HCU provi des 2 s eparate out let port s t o t he RHfront and LH rear brakes . The secondary circuit in t he HCU provi des 2 s eparate out let port s t o t he LH front and RH rearbrakes.
The HCU i ncorporates 3 brake operati ng modes as fol lows :
Normal braki ng/ El ect ronic Brake Force Dis t ri but ion (EBD)ABS brakingActi ve braking.
As t he HCU and ABS modul e is a ful ly i ntegrat ed unit , the des cript ion and operat ion det ai ls for the HCU and ABSfuncti onal it y, i ncl udi ng t he 3 braking modes , are det ail ed in the Ant i-Lock Control - Stabil it y As si st secti on of the manual .For addit ional informat ion, refer t o: Anti -Lock Cont rol - St abi li ty As s is t (206-09 Anti -Lock Cont rol - St abi li ty As s is t ,Des cript ion and Operat ion).
Servicing Information
The ABS module and HCU form a s ingle component and must not be s eparat ed. The ABS modul e and HCU as s embly i ss uppl ied i n a pre-fill ed s tat e. Aft er i nst all at ion, t he hydraul ic brake sys t em only requi res a conventi onal bleed of t hes ys t em; t here is no requirement to press ure bleed t he s ys t em.
• NOTE: The ABS module and HCU i s a fragil e component and mus t be dis carded if dropped or damaged.
PRINCIPLES OF OPERATION
As t he brake pedal i s pres s ed, t he front push rod i n t he brake boost er pus hes t he mas ter cyl inder pri mary pi st on along t hebore of t he housi ng. This produces pres s ure in t he pri mary pres sure chamber and i n conjunct ion wi th the primary s pri ng,overcomes the s econdary s pring and s i mult aneous ly moves t he s econdary pi st on along the bore.
The ini ti al movement of the pi s tons away from the pi st on s t ops cl os es t he pri mary and secondary cent er val ves l ocat edins ide the mas t er cyli nder. Further movement of the pi st ons then press uri zes the flui d in the primary and s econdarychambers and t he brake circuit s . The fl uid i n t he chambers behi nd the pi s tons i s unaffected by the movement of the

3-Right -Hand (RH) rear wheel s peed s ens or
4-Steering wheel modul e (including s t eering angle sens or)
5-Left -Hand (LH) rear wheel s peed s ens or6-Sensor clus ter
7-LH front wheel speed s ensor
8-Int egrat ed Anti -l ock Brake Sys t em (ABS) modul e and Hydrauli c Cont rol Unit (HCU)9-RH front wheel speed s ensor
10-Central Junct ion Box (CJB)
OVERVIEW
The vehi cl e ABS and s t abi li ty control sys tem feat ures a Cont inental Teves Mk25E1 module, wi th an int egral 4-channel HCU.The int egrated ABS modul e and HCU is l ocat ed on t he rear LH s ide of t he engine compart ment, and i s ins tal led i n t hebrake hydrauli c ci rcuit bet ween the brake mas ter cyl inder and the 4 brake calipers.
The ABS module is connect ed to the hi gh s peed Cont roll er Area Net work (CAN) bus , and acti vel y int eracts wi th othervehi cl e s yst em cont rol modules and as sociat ed s ens ors to recei ve and transmit current vehicle operat ing informati on.
W hen requi red, t he ABS module wi ll acti vel y int ervene and operate the HCU during braki ng or vehi cl e maneuvers t o correctt he vehi cl e att it ude, s t abi li ty, t racti on or speed. During severe incident s of vehicle correct ion, t he ABS module will al soreques t the Engine Cont rol Modul e (ECM) to reduce engi ne power i n order t o further stabil ize and correct t he vehicle.
To provide full s ys tem functi onali ty, t he ABS and DSC s ys tems compris e t he fol lowing component s :
DSC s wit chHDC s wi tch4 wheel s peed s ens orsSens or clus terSteering angle s ens orIns t rument clus ter i ndi cat or lampsInt egrat ed ABS module and HCU.
The ABS s yst em al s o provides brake funct ions t hat are des igned to ass is t t he vehi cle or aid the driver. The followi ngfuncti ons are det ai led i n t he s ect ion 'Principl es of Operati on':
Anti -l ock Brake Sys t em (ABS)Corner Brake Control (CBC)Dynamic St abi li ty Cont rol (DSC)Electroni c Brake Force Di s tributi on (EBD)Electroni c Tracti on Control (ETC)Emergency Brake As s is t (EBA)Engi ne Drag-Torque Control (EDC)HDC (wit h gradi ent releas e cont rol )Roll Stabi lit y Control (RSC)Terrai n Res pons e™ sys tem int egrati on.
All t he brake funct ions li s ted, apart from HDC, are automat icall y act ive when t he i gni ti on is in power mode 6 (igni ti on) andt he engi ne is runni ng.
DYNAMIC STABILITY CONTROL SWITCH
The DSC s wit ch all ows the DSC functi on to be s elect ed off. The DSC s wi tch i s non-latchi ng and is i nst all ed in the floorcons ole, forward of the gear s el ect or lever. Pres s ing t he DSC s wi tch connects an ignit ion power feed to t he ABS modul e.W i th the firs t pres s of the DSC swit ch, t he ABS module di sabl es the DSC funct ions . When t he DSC s wi tch i s pres sed agai n,t he ABS module re-enables t he DSC funct ions. The DSC swi tch must be press ed for a minimum of 0.3 s econd for the ABSmodule t o react . The DSC functi on is re-enabled at t he beginning of each ignit ion cycle.
To confirm that t he DSC functi on is sel ect ed off, the amber colored DSC warni ng indicator l amp located i n t he ins t rumentclus ter, is conti nuous ly i ll uminated. On vehicles i nst all ed wit h a hi gh-li ne ins t rument clus ter, a mes sage i s als o di spl ayedin the mess age cent er to confirm t hat DSC is s elect ed off.
For addit ional informat ion, refer t o:
Ins trument Clus ter (413-01 Ins t rument Clus t er, Descripti on and Operat ion),Informat ion and Mes s age Cent er (413-08 Informati on and Mes sage Cent er, Descripti on and Operat ion).
W hen t he DSC funct ion i s s elected on, t he DSC warni ng indicator l amp is ext inguis hed.
Alt hough Land Rover recommend t hat DSC is s elected on for all normal driving condit ions, i t may be benefi ci al t o de-sel ectDSC i n order t o maximi ze tract ion under t he foll owing condit ions:
To rock t he vehicle out of a holl ow or a s oft surface.W hen driving on loose s urfaces or wit h s now chains ins t al led.W hen driving i n deep s and, s now or mud.W hen driving on tracks wi th deep l ongi tudinal rut s .
Even when DSC is des elected, dri ving maneuvers wi th ext reme yaw or lateral acceleration may trigger RSC act ivit y t oas si st the vehicle st abili ty.
To prevent mis -use of, or in the event of a broken DSC s wit ch, a Diagnost ic Troubl e Code (DTC) i s s tored in the ABSmodule memory i f the input from t he DSC s wit ch is hel d high for more than 1 minut e.
HILL DESCENT CONTROL SWITCH
The HDC s wi tch control s t he s el ect ion of t he HDC funct ion.

W hen t he brake pedal is rapi dly press ed.W hen t he brake pedal is pres s ed hard enough t o bri ng t he front brakes i nto ABS operati on.
W hen t he brake pedal is rapi dly press ed, the ABS modul e i ncreas es t he hydraul ic press ure to al l of the brakes unt il t het hreshol d for ABS operat ion i s reached. This act ion appli es the maxi mum braking effort for the avail abl e t racti on. The ABSmodule moni tors for t he s udden appli cat ion of t he brakes , us i ng inputs from t he brake pedal s wi tch and from the press ures ens or wit hin the HCU. W it h t he brake pedal pres s ed, if t he rat e of increas e of hydraul ic press ure exceeds thepredetermined l imi t, t he ABS modul e invokes emergency braki ng.
W hen t he brake pedal is pres s ed hard enough t o bri ng t he front brakes i nto ABS operati on, t he ABS module increas es thehydraulic press ure to the rear brakes up to the ABS thres hold.
EBA operat ion cont inues unti l the driver rel eas es t he brake pedal , s uffi cientl y for t he hydraulic press ure in the HCU to dropbelow a threshold val ue s tored in t he ABS modul e.
Engine Drag-Torque Control
EDC prevents wheel s li p caus ed by any of t he fol lowing:
A s udden decreas e i n engine t orque when t he accelerator is suddenly released.The s udden engagement of t he clutch after a downs hift on manual t rans mi ss ion vehicl es .A downs hift us i ng the CommandShift functi on on automat ic t rans mi ss ion vehicl es .
W hen t he ABS module det ects t he ons et of wheel s lip wit hout t he brakes being appli ed, t he ABS module s ignal s t he ECMvia t he high speed CAN bus t o reques t a moment ary increase in engine torque.
Hill Descent Control
HDC us es engine braking and brake int ervent ion to control the vehicle speed and accel erati on duri ng low speed off-roaddescents , and in low grip on-road condit ions. General ly, equal pres s ure i s applied to al l 4 brakes , but pres s ure to individualbrakes may be modi fi ed by t he ABS and DSC funct ions to ret ain t he vehi cles s tabil it y. Sel ect ion of t he HDC funct ion i scont rol led by t he HDC s wi tch l ocat ed on t he fl oor consol e. HDC operates at vehicle speeds up t o 50 km/h (31 mph).
W ARNING: Incorrect us e of the HDC functi on may compromis e t he s tabil it y of the vehicle, resul ti ng in a dangerousand uncont roll ed hil l des cent . Pres si ng t he cl utch pedal and/or driving wit h t he trans mi s si on in 'Neutral' whil e HDC i sact ive, wi ll prevent engine braking from ass is t ing t he vehicle. The brakes wil l overheat and i nduce t he HDC fade outs trategy. In this condit ion t here will be no cont rol over t he vehi cl e duri ng a des cent .
• NOTE: W i th the HDC functi on s elect ed, HDC i s operati ve even when the clut ch pedal is pres sed or t he t rans mis s ion i s int he 'Neutral' posi ti on. It is not recommended t o drive t he vehi cl e furt her t han is abs olut el y neces s ary wi th HDC s elected,and t he cl utch pedal press ed/ or the t rans mi ss i on in 'Neut ral '.
On manual transmis s ion vehicles , HDC may be us ed i n firs t and reverse gears only. Once the vehicle is movi ng, t he clut chpedal i s to be ful ly releas ed. The vehicle i s not recommended to be dri ven wit h HDC act ive and t he transmis si on in'Neut ral'.
On aut omati c trans mi s si on vehi cl es, HDC may be us ed i n 'D' dri ve, 'R' revers e and CommandShi ft '1' only. W hen in 'D', t heTCM wi ll automat icall y s el ect t he mos t appropri ate gear. The vehicle is not recommended t o be driven wit h HDC act ive andt he trans mi s si on in 'Neutral'.
HDC i s able t o be sel ect ed at speeds up t o 80 km/h (50 mph), but wi ll only be enabled at s peeds bel ow 50 km/h (31 mph).
W hen HDC is s elect ed:
At s peeds up t o 50 km/h (31 mph), the HDC informat ion i ndi cat or lamp i s permanentl y i llumi nated i f a valid gear i ss elect ed.At s peeds bet ween 50 to 80 km/h (31 to 50 mph), t he HDC i nformat ion indicator lamp fl ashes and on vehicles wit ht he high l ine i ns t rument clus ter, a mes s age advis i ng that t he s peed i s t oo high i s dis played in the mes s age cent er.If the HDC swit ch is pres s ed whil e t he vehi cl e s peed is great er than 80 km/h (50 mph), the HDC informat ionindicat or l amp wi ll not il lumi nat e and HDC will not be s elected.If the s peed reaches 80 km/h (50 mph) or more, a warni ng chi me i s s ounded, the HDC functi on is swi tched off, t heinformat ion i ndi cat or lamp is exti ngui shed and, on vehicles wi th the hi gh li ne ins trument cl ust er, a mess ageadvi s ing t hat HDC has been swi tched off i s dis played i n the mess age center.
For addit ional informat ion, refer t o:
Ins trument Clus ter (413-01 Ins t rument Clus t er, Descripti on and Operat ion),Informat ion and Mes s age Cent er (413-08 Informati on and Mes sage Cent er, Descripti on and Operat ion).
W hen HDC is enabled, the ABS module calculat es a t arget speed and compares t his wi th the act ual vehicle s peed. The ABSmodule t hen operates the HCU in t he acti ve braking mode as required, t o achi eve and maint ain t he t arget speed.Operat ion of t he vehi cl e s toplamps during HDC is controll ed by the CJB.
Applying t he foot brake during acti ve braking may res ult i n a puls e being felt t hrough t he brake pedal.
The t arget speed vari es bet ween mi nimum and maximum values for each gear and t rans miss ion range, dependi ng on driverinputs through t he foot pedals . If the foot pedals are not operated, t he ABS module adopts a default t arget s peed:
HDC Target Speeds
T arget Speed
Automatic T ransmission GearManual T ransmission Gear
1st and DriveReverse1stReverseDefaul t10 km/h (6 mph)3.5 km/h (2.2 mph)10 km/h (6 mph)8 km/h (5 mph)
Mi ni mum6 km/h (3.7 mph)3.5 km/h (2.2 mph)7.5 km/h (4.7 mph)8 km/h (5 mph)
Maximum20 km/h (12.4 mph)3.5 km/h (2.2 mph)20 km/h (12.4 mph)8 km/h (5 mph)The t arget speed i s varied bet ween the mini mum and maxi mum values us ing the accel erator pedal, or by pres s ing t he

s peed control '+' and '-' but t ons (dependant on vehi cl e s peci fi cat ion). The HDC Target speed wi ll als o vary depending ont he Terrai n Respons e™ mode sel ect ed.
Duri ng changes of target s peed, the ABS modul e li mit s vehicle decelerat ion and accelerat ion t o -0.5 met ers per s econd
s quared (m/s2) (-1.64 feet per s econd squared (ft/s2)); and +0.5 m/s2 (+1.64 ft/s2) res pect ively.
To provide a s afe t rans it ion from acti ve braking t o brakes off, the ABS module i nvokes a fade out st rat egy that graduall yrel eas es t he braking effort during act ive braking. The fade out s t rat egy occurs i f any of t he fol lowi ng condit ions i s detectedduri ng act ive braki ng:
HDC i s s elected off us i ng the HDC s wit ch.Failure of a component us ed by HDC, but not crit ical t o fade out funct ion.Accelerator pedal pres s ed when t rans mis s ion i s i n neut ral .Brakes overheat .
If fade out is i nvoked becaus e of HDC de-s el ect ion or component failure, the HDC functi on is cancel led by t he ABS module.If fade out is i nvoked becaus e t he accelerator pedal i s pres s ed wit h t he t ransmis s ion i n neut ral , or because of brakeoverheat , t he HDC funct ion remains in s tandby and res umes operati on when t he accelerat or pedal is releas ed or the brakeshave cooled.
The fade out s t rategy i ncreas es t he t arget speed at a cons tant accelerati on rat e of 0.5 m/s2 (1.64 ft/s2), unti l themaximum t arget speed i s reached, or unti l no act ive braki ng is required for 0.5 second. If t he accelerat or pedal is
posi ti oned wit hin t he range t hat infl uences t arget s peed, the accelerat ion rate is increas ed t o 1.0 m/s2 (3.3 ft /s2).
W hen fade out is i nvoked becaus e of component fai lure, a warning chime is sounded and the HDC informat ion i ndi cat orlamp is ext inguis hed. The HDC warning i ndicat or lamp is t hen il lumi nat ed (on low-li ne ins trument cl ust er), or a mes s ageadvi s ing of t he fault i s dis played in the mess age cent er (on hi gh-l ine i ns t rument clus ter).
For addit ional informat ion, refer t o:
Ins trument Clus ter (413-01 Ins t rument Clus t er, Descripti on and Operat ion),Informat ion and Mes s age Cent er (413-08 Informati on and Mes sage Cent er, Descripti on and Operat ion).
W hen fade out is i nvoked becaus e of brake overheat, on vehicles wi th the hi gh-li ne ins t rument clus ter, a mes sage advis ingt hat HDC is t emporarily unavail abl e is di s pl ayed. On vehicles wit h t he low-line ins trument cl us t er, t he HDC warningindicat or l amp flas hes . At t he end of fade out, t he HDC informati on indicat or flas hes. The flas hing warni ng and informat ionindicat or l amps, and/or di spl ayed mes s age cont inue whi le HDC remai ns sel ect ed, unt il t he brakes have cooled.
For addit ional informat ion, refer t o:
Ins trument Clus ter (413-01 Ins t rument Clus t er, Descripti on and Operat ion),Informat ion and Mes s age Cent er (413-08 Informati on and Mes sage Cent er, Descripti on and Operat ion).
To monit or for brake overheat, t he ABS modul e monit ors t he amount of braking acti vi ty and, from thi s, es ti mat es thet emperature of each brake. If the es t imat ed temperature of any brake exceeds a pres et li mit , t he ABS module i nvokes t hefade out s t rategy. Aft er the fade out cycle, t he HDC funct ion i s re-enabl ed when the ABS modul e es ti mates that all of thebrake t emperatures are at l ess than 64% of the preset t emperat ure l imi t.
Roll Stability Control
The RSC funct ion us es the brakes and the engine t o at tempt t o rest ore vehicle s tabilit y, i f the vehicle is forced i nt o ahars h maneuver t hat ri sks i t ti pping over.
The ABS module monit ors dri ver i nput s and vehicle behavior usi ng various powert rai n s ignals and t he i nput s from thewheel s peed s ens ors, t he s teering angle s ens or, the roll rate sens or, yaw rate and lateral accel erat ion s ensors. Thes einputs are compared wit h modeled behavi or and, if t he vehicle behavior reaches a given ris k level, t he ABS module cut st he engi ne power, or brakes one or more wheels suffi ci ent ly to al low the vehicle to regain s t abi li ty and hel p the driverremai n i n cont rol .
W hi le t he i gni ti on is energi zed, RSC i s permanentl y enabl ed even if t he DSC functi on is sel ect ed off.
Terrain Response™ System Integration
The Terrai n Res pons e™ funct ion integrat es t he ABS and other vehicle s ys tem cont rol modules t o as si s t the vehicle whendri vi ng off-road or during di fficult s urface condit ions . Terrai n Respons e is act ivated when the rotary cont rol s wit ch is s et t oa Terrain Res ponse special program.
W hen a Terrai n Respons e s peci al program i s acti vat ed, t he ABS module along wi th ot her vehicle s ys t em control modul eswil l operate in accordance wi th programmed software maps . The s oftware maps al low t he ABS s ys tem to functi on wit h at hreshol d that wi ll as si s t the s elected Terrai n Respons e s pecial program.For addit ional informat ion, refer t o: Ride and Handli ng Opti mizat ion (204-06 Ride and Handli ng Opt imi zat ion, Descripti onand Operat ion).

11-Int egrated audio modul e
12-Int egrated control modul e
PRINCIPLES OF OPERATION
Windshield Wiper Switch
ItemPart NumberDescription
1-Intermit tent wi pe/rai n s ens or
2-Low s peed wipe3-Hi gh s peed wi pe
4-Singl e wipe - pul l down and releas e
5-Intermit tent wi pe del ay or rai n s ens or s ens it ivi ty6-Intermit tent operat ion of t he rear wiper
7-Operat es t he rear was her and wi per
The winds hield wiper functi ons are operat ed by moving t he s wit ch up or down. Fl ick wi pe is s elected by pus hing the s wi tchdown. The swi tch i s non-l at chi ng in thi s posi ti on and wiper operati on is st opped when the swi tch i s rel eas ed and i t ret urnst o the off posi ti on. The fli ck wipe s wi tch contact is connect ed on a s ingl e wire t o t he Cent ral junct ion box (CJB) andground. Thi s is the s ame connect ion t o t he CJB as t he fas t s peed wipe. W hen t he s witch is operat ed t he ci rcuit i scompleted bet ween the CJB and ground. The CJB detects the complet ed circui t and operat es t he wipers for as l ong as thes wit ch cont act i s made.
Int ermit tent is sel ect ed by pushi ng the wiper swi tch up, t o t he det ent pos i ti on; t he wi pers operate at the del ay periods elect ed on t he rot ary swi tch on the wi per st alk. The wipers remai n in the i ntermit tent mode unt il t he wiper s wit ch ismoved t o the off or s low/fas t speed pos it ions. The i ntermit tent s wit ch cont act is connected bet ween t he CJB and ground.W hen t he s wit ch is moved to the i ntermit tent posi ti on t he ci rcuit i s completed. The CJB detects the complet ed circuit andoperates t he wi pers i n the intermit t ent delay sel ect ed for as l ong as the s wi tch contact is made.
The int ermi tt ent del ay period is s elected us i ng a rot ary control on the wiper s wit ch st alk. The rot ary control al lows t hedri ver t o s elect s ix delay periods to s ui t the prevai li ng weather condit ions . The rot ary control i s connected on three wirest o the CJB and a s ingle wire to ground. The s i x pos i ti ons each us e a di fferent combinat ion of t he t hree wi res . The CJBdetects , via the t hree wi res , which s electi on has been made and operates t he wi pers wi th the appropri ate del ay.
Slow speed operat ion i s s el ect ed by pus hi ng t he wiper s wit ch up, t o t he s econd det ent pos it ion. The wipers operate ats low speed unti l the wiper swi tch i s moved t o t he off, intermit t ent or fast s peed posi ti ons . The s low s peed s wi tch contactis connect ed between t he CJB and ground. W hen t he s wit ch is moved t o t he s low speed pos it ion t he circuit is complet ed.The CJB detects t he complet ed ci rcuit and operat es the wipers at s l ow s peed for as long as the s wi tch cont act is made.
Fast s peed operati on is sel ect ed by pushi ng the wiper swit ch up, t o t he thi rd det ent pos it ion. The wi pers operate at fas ts peed unt il t he wiper s wit ch is moved to t he off, int ermi tt ent or sl ow s peed pos i ti ons . The fas t s peed s wit ch cont act i sconnected bet ween the CJB and ground. W hen t he s wit ch is moved to the fast speed posit ion t he circuit i s complet ed. TheCJB detects t he complet ed ci rcuit and operat es the wipers at fas t speed for as long as t he s wit ch cont act i s made.
The winds hield washer functi on butt on is locat ed on t he end of t he swit ch st alk. W hen t he butt on is pres sed a circuit i scompleted bet ween the CJB and ground. The CJB detects the complet ed circui t and operat es t he winds hield washer for aslong as t he butt on i s depress ed.
Rear W as h/W i pe Swit ch
The rear was h/wi pe functi ons are operat ed by moving t he s wit ch rearwards . Rear wi pe is sel ect ed by moving t he wi pers wit ch rearwards t o the fi rs t detent posi ti on. The rear wiper swit ch is connected bet ween t he CJB and ground. W hen thes wit ch is moved t o t he rear wi per pos it ion t he circui t is complet ed. The CJB det ect s t he compl eted circui t and operates t herear wi per for as long as t he s wit ch cont act i s made.
The rear was her i s s elected by movi ng the wiper s wit ch rearwards to the s econd, non-l atching pos it ion. W hen t he s wit ch ismoved t o thi s posi ti on a circui t is compl et ed between t he CJB and ground. The CJB det ect s t he completed ci rcuit andoperates t he rear was her for as l ong as the s wi tch contact is made.
For addit ional informat ion, refer t o: W i pers and W as hers (501-16 W ipers and W as hers , Des cri pti on and Operati on).
Turn Signal Indicator and Headlamp Switch
The t urn s ignal indicator s wit ch as sembl y is locat ed i n the left hand s ide of t he case and is retai ned in t he case wit h t wos crews . The swi tch i s connected t o t he mai n harnes s via a connect or on the back of the s wit ch. The s wit ch cont rol s thefol lowing funct ions :
Left / right turn s ignal operati onHigh / low beam operati onHeadl amp flas hComputer functi on s electi on (i f fi tt ed).

Publi s hed: 23-Aug-2011
Engine - I6 3.2L Petrol -
Lubricants, Fluids, Sealers and AdhesivesDescriptionLand Rover Part No.
Cam cover to cyli nder head jointLR006801 (Loct it e 510)
Bedplate to oi l s umpSTC50550Block t o bedpl ateSTC50550
Engine oil - NAS, Mi ddl e Eas t and Nort h Africa Models5W /30 - ACEA A1 + ILSAC GF-3 or ILSAC GF-3*
Engine oil - ROW Models0W /30 - ACEA A5/B5The recommended oil change i nterval for ILSAC GF-3 is 5000 mi les .
C apacities
ItemCapacity (liters/pints/USquarts)
Dry fi ll i ncludi ng fi lt er9.3/16.4/9.8
Service fil l - includes fi lt er7.7/13.6/8.1Amount of oil required t o bri ng the level from the lower to the upper mark on thedips t ick0.8/1.4/0.9
General Specification
ItemSpecificationType3.2 li ter, inli ne 6 nat urall y aspi rat ed pet rol engine, twi n overheadcams haft s, 4 val ves per cylinderCyli nder arrangementInli ne 6
Cyli nder numberi ng1-6 from front of engine
Bore - nominal84.0 mm (3.307 in)St roke96.0 mm (3.779 in)
Capaci ty3192 cm³ (195.8 i n³)
Firing order1 - 5 - 3 - 6 - 2 - 4Compres s ion rati o10.8:1
Di recti on of rotat ionCl ockwis e from front of engi ne
Maximum power171 kW (230 hp) @ 6300rpmMaximum t orque317 Nm (234 lb-ft ) @ 3200rpm
Engine oil pressure*:
At 800 rev/min1.03 bar/103 kPa/15 lb/in²At 4000 rev/min3.45 bar/345 kPa/50 lb/in²
Oil pump
Oi l pump to cranks haft clearance0.087mm ±0.022 mm (0.00343 i n ± 0.000866 i n)Maximum permissible cylinder head w arp:
Over head length0.05 mm (0.00196 i n)
Over head widt h0.03 mm (0.00118 i n)Cyli nder head height149.4 mm ± 0.15 mm (5.882 in ± 0.0059 i n)
Maximum permi s si ble amount t o be removedduri ng s ki mmi ng0.3 mm (0.0118 in)
Main bearing journals:
Number7
Di amet er s tandard65 mm + 0.004 - 0.015 mm (2.55 in + 0.000157 - 0.000590 in)Maximum diamet er variat ion0.006 mm (0.000236 in)
Big end journals:
Di amet er s tandard50 mm + 0.004 - 0.015 mm (1.96 in + 0.000157 - 0.000590 in)Maximum diamet er variat ion0.01 mm (0.000393 i n)
Camshaft:
Number of bearings7 per cams haftT appets+:
InletHydrauli c
Exhaus t +GradedValves:
Valve clearance - Exhaus t0.45mm ±0.05 mm (0.0177 in ± 0.00196 in)
Lengt h - i nlet valve106.19 mm ± 0.07 mm (4.18 in ± 0.0275 i n)Lengt h - exhaus t valve129.96 mm ± 0.07 mm (5.12 in ± 0.0275 i n)
Seat angl e45° ± 0.01°
Head diamet er - inlet valve33 mm ± 0.15 mm (1.29 in ± 0.0590 i n)Head diamet er - exhaus t val ve28 mm ± 0.15 mm (1.10 in ± 0.0590 i n)
St em diamet er - inlet valve5.97 mm + 0 -.015 mm (0.235 in + 0 -000590 i n)
St em diamet er - exhaus t val ve5.962 mm +0 -0.007 mm (0.234 in +0 -0.000275 i n)St em t o guide clearance - i nlet val ve50-70 µm
St em t o guide clearance - exhaus t valve50-70 µm
Valve springs:TypeConical
Lengt h (free)45 mm (1.77 in)
* Prior to checking the engine oil pressure, a road test of 6 miles (10 kilometres) must be carried out. Do notattempt to attain normal engine operating temperature by allowing the engine to idle.
+ T here are 50 different thicknesses of graded tappet available ranging from 2.950mm to 3.685 mm (0.116 in to0.145 in) rising in increments of 0.015 mm (0.0005 in).
Torque Specifications

At low engi ne s peed t he volume of exhaust gas l eavi ng the engine is l ow. The vanes are moved toward the cl osed pos it iont o direct t he exhaus t gas fl ow t o t he out s ide edge of t he turbine wheel. The clos ed posi ti on of the vanes creates ares t ri ct ion t o t he gas fl ow and i ncreas es t he gas vel oci ty to the t urbine wheel . The turbi ne wheel s peed is increas ed,cons equent ly producing more charge ai r (boos t pres sure) from t he compres sor.
B - Moderate Engine Speed
As engine s peed and exhaus t gas vol ume increas e, the vanes are moved to the open posit ion t o direct t he exhaus t gasfl ow t oward t he center of the turbi ne wheel . The vanes do not rest ri ct the exhaus t gas flow and therefore exhaus t gasveloci ty is dependant on engine s peed. The t urbi ne wheel s peed is maintai ned due to the i ncreas ed velocit y of t he gas esleaving t he engine and being di rected t oward the center area of t he t urbine wheel .
C - Maximum Engine Speed
At maximum engine s peed the volume of exhaus t gas leavi ng t he engi ne is hi gh. The vanes are moved toward the full yopen pos i ti on and do not affect t he gas vel oci ty. The exhaus t gas fl ow contacts t he center area of t he t urbine wheel tomaint ain t he t urbine wheel s peed and boos t pres s ure from the compress or.
Over-Boost Pressure
Duri ng periods of medi um t o hard accelerat ion, the turbocharger is requi red t o produce a l imit ed period of over-boos tpres s ure from the compress or to meet the current engi ne fueli ng requirement. The ECM wil l reques t and all ow t he REA t omove t he variable vanes t oward t he clos ed posi ti on t o increas e t he vel oci ty of t he already high-s peed turbine wheel. Theover-boos t condit ion is all owed by t he ECM for t he l imi ted period.
Barometric Pressure Sensor
At high al ti tude t he t urbocharger wi ll functi on normal ly, but due t o t he l ower ambi ent ai r pres sure t he turbi ne andcompres sor may tend t o over-speed. A baromet ri c pres sure s ensor i s located i n t he ECM t o prevent over-boost andposs i bl e engine damage occurri ng under t hes e condit ions. The ECM opens t he vari abl e vanes earlier duri ng t he openi ngphas e to s uit the al ti tude of t he vehi cl e.
T urbocharger Lubrication
The rapi d accelerat ion and decelerat ion demands of t he turbocharger rel y on a s t eady flow of cl ean oil. The oi l suppli ed byt he engi ne lubri cat ion s ys tem provides l ubricati on to the t urbocharger shaft and bearings, whi le al so act ing as a cool antfor t he t urbocharger cent er hous i ng.
To mai nt ain the l ife expect ancy of t he turbocharger, t he engine oil mus t be replenished at regular s ervice i nt ervals wit ht he recommended qual it y and quant it y of oil . The oi l mus t have a free-fl ow t hrough the turbocharger and an unres trict edret urn to t he engine oi l pan.