LAND ROVER FRELANDER 2 2006 Repair Manual

ItemPart NumberDescription
1-Seat pos it ion sens or2-Target bracket
The s eat pos it ion s ens or, a ’Hal l effect ’ type, is fit ted t o t he unders ide of t he dri ver’s s eat. The s ensor i s act uated by thet arget bracket at tached to the s eat s lide. The dis t urbance caus ed when the target bracket pas s es t he sens or creates anoutput s ignal for the RCM. On receipt of t hi s s ignal, which i ndicat es when t he s eat i s forward of a defined poi nt i n i tst ravel , the RCM dis ables t he s econd s t age out put of t he dri ver ai r bag; refer t o air bags s ect ion.
Control and Processing
Restraints Control Module
Int ernall y, the Res traint s Cont rol Module (RCM) has t wo areas t hat det ermi ne which el ement s of t he res traint s yst em aret o be deployed:
Area 1 - Cras h s everit y evaluati on:
The fi rs t area eval uat es cras h s everit y by us ing data from t he module's internal accel eromet er, t he front cras h sens or andt he safety-bel t buckle sens or. Bas ed on thi s data, t he RCM decides which l evel of air bag deployment is requi red andforwards t he informat ion t o t he s econd area, t he deployment handler.
Area 2 - Deployment handler:
The s tat us of the s eat posi ti on s ens or, occupant clas si fi cat ion s ens ing s yst em and safet y-belt buckle s ens ors areexamined before a decis ion i s made about which res t raint s s houl d finally be depl oyed. For ins tance, i f the occupantclas si fi cat ion s ens ing s yst em indicates t hat the pas senger s eat i s empty, t hen no res t raint deployment wil l take place ont he pas s enger s ide, even if full depl oyment t akes pl ace for t he dri ver.

An energy reserve in the RCM ens ures there is al ways a mini mum of 150 mill is econds of s tored energy avai lable if t hepower supply from t he ignit ion s wi tch i s dis rupt ed during a cras h. The st ored energy i s s ufficient t o produce fi ri ng si gnal sfor t he dri ver ai r bag, t he pass enger ai r bag and the s afet y belt pret ensi oners .
W hen t he i gni ti on is s wi tched on t he RCM performs cycli cal monit ori ng of the sys tem. If a fault is det ect ed t he RCM s t oresa related fault code and s ends t he s ignal to il luminat e t he air bag warni ng indicator. The fault s can be retrieved by theLand Rover approved diagnos t ic s ys tem. If a faul t that coul d cause a fal se fi re si gnal i s det ected, the RCM dis ables t heres pect ive firing ci rcuit , and keeps it di s abl ed during a cras h event .
Air Bags
Hybrid Inflator Technology
All air bags feat ure hybrid i nflat ors , rat her than t he previous ly us ed s olid pyrotechni c gas generators which us e anexpl osi on t o generate t he air bag charge di rectl y. Hybrid i nflat ors us e a sel f-cont ained pyrotechnic device t o heat a cyl inderof compress ed i nert gas wit hin the i nfl at or. Above a cali brated press ure, t his cyli nder burs t s and t he gas is released intot he fabri c bag.
The benefit s of hybrid infl ators are cooler gas, hence lower bag s urface t emperat ures , and the el imi nat ion ofpost -deployment effluent ass ociat ed wit h s oli d pyrotechnic generators.
Dual Stage Inflators
Both the driver air bag and pass enger ai r bag feature dual-st age inflat ors . Each ai r bag empl oys two separat e i nflat ors ,fi tt ed wi th independent squibs connect ed t o the ai r bag. This allows ai r bag s ize, press ure and rat e of ri s e in pres sure t obe opti mized t o s uit t he vehicle's s t ructural characteris ti cs as well as t he s everity of the act ual i mpact .
The res t raint control modul e (RCM) moni tors t he s everi ty of the coll is ion, s afety bel t tens ion and proxi mit y of t he dri ver'ss eat t o t he s teering wheel in order t o det ermi ne the ai r bag depl oyment s t rat egy:
At rel ati vel y low speeds, or when s mal ler occupant s are s eat ed clos e t o t he st eeri ng wheel only the 'st age 1'inflat or deploys ; thi s inflates t he air bag t o about 70% of i ts capaci ty.At higher speed i mpact s both 's tage 1' and aft er a pre-s et interval , 's tage 2' inflat or deploys t o achi eve maximumair bag volume, unles s t he dri ver i s dangerous ly cl os e to t he s t eering wheel.
Driver Air Bag
The dri ver ai r bag has a two s tage i nflat or, wi th s eparat e electrical connect ors for each s t age. Lines mol ded int o t he inners urface of t he dri ver ai r-bag cover, provi de weak poi nts t hat s pl it open i n a control led manner when t he dri ver air bagdepl oys .
Passenger Air Bag
ItemPart NumberDescription
1-Stage one – 70% air bag volume
2-Stage t wo – full ai r bag vol umeThe t op of the pas senger air bag is att ached t o a re-enforcement l id in t he ins t rument panel . The reinforcement lidincorporat es a s ingle door t hat opens , spl it ti ng the ins trument panel coveri ng, when the ai r bag deploys . The air bag has at wo s tage i nflat or, wi th separat e electrical connect ors for each st age.
Passenger Air Bag Disable Switch

A key-operat ed pass enger ai r bag di s abl e s wit ch is ins tall ed in specified market s . When t he pass enger ai r bag deacti vat ions wit ch is operat ed, it changes a ground connect ion bet ween two pins i n the connect ors of t he RCM. A t ell -t ale warningli ght , located in t he roof consol e near t he i nt eri or rear vi ew mirror is i ll uminated when the pas s enger air bag i s dis abled.
The pass enger ai r bag dis abl e s wit ch is operat ed by t he emergency key locat ed i n t he remot e cont rol .
Passenger Air Bag Deactivation Indicator
W hen t he pas senger ai r bag deact ivati on s wit ch is s elected to O FF, t he RCM dis ables t he pas senger ai r bag and if t hefront pas s enger s eat is occupi ed, i ll uminates t he pas senger ai r bag deact ivati on indicator.
Side Air Bags
A s i de air bag is at t ached t o t he out s ide of each front seat backrest frame, under the backres t cover.
The s ide ai r bags are handed and each cons i st s of a mol ded plas ti c cas e whi ch cont ains t he fol ded ai r bag and the infl ator.A cable connect s t he ignit er of t he i nflat or to a connector in the main s eat harness connect or block locat ed under the frontedge of the s eat cus hion. W hen t he air bag deploys i t forces t he front edge of t he mol ded plas ti c cas e apart and s pli tsopen the backres t cover.
Side Air Curtains

ItemPart NumberDescription
1-Air curt ai n housi ng2-Depl oyment ramps
3-Gas generat or
4-Rear t ether5-Curtai n
6-Air chambers
7-Front tet herSide ai r curtains protect agai nst head i njuri es in a s ide i mpact , whil e als o helpi ng to ens ure unres trai ned occupant s are notejected through open or broken wi ndows during a roll over event .
A s i ngl e inflat or mount ed behi nd t he rear s eat pas s engers unfurl s the curtain and fills fi ve separat e chambers t o providehead prot ect ion cushi ons for occupant s i n s ide-i mpact and roll -over event s. St eel ramps guarantee t he curt ain does nots nag on the interior t ri m as i t unfurl s , whi le tet hers at t he front and rear of t he curt ain ens ure t he curt ain i s held t aut.
The s ide ai r curtain deflat ion characteris ti cs are deli beratel y s low t o ens ure i t remai ns inflated throughout the durat ion ofa vehicle roll over event .
Air Bag Warning Indicator
The air bag warni ng indi cat or cons is ts of a red LED (li ght emit ti ng diode) behi nd a SRS graphic in t he i ns t rument clus ter.
Operat ion of t he air bag warni ng indicator i s cont rol led by a hi gh-s peed CAN bus mess age from t he RCM t o t he ins t rumentclus ter. The RCM s ends t he s ignal to il luminat e t he air bag warni ng indicator i f a faul t is det ect ed, and for approxi matel y 6s econds duri ng the bul b check at t he begi nni ng of each i gnit ion cycl e.
Clockspring
The clocks pri ng is ins tall ed on t he s teeri ng column t o provi de the el ect ri cal i nt erface bet ween t he vehi cl e's fixed wiringharnes s and the st eering wheel . The cl ocks pring provides connecti ons for the driver air bag, horn and s teering wheel swit chpacks .
Safety Belt Pretensioners

A pretens ioner i s i nt egrat ed int o each front s afet y belt buckl e and att ached to a bracket on t he i nboard s ide of t he seat .The pret ens i oner pull s 80mm of s lack from the safet y belt t hrough a cable sys tem running parallel t o t he s eat rail . Thi st ightens t he front safety belt s duri ng a coll is ion t o ens ure t he occupants are s ecurely held in t heir s eats .
Each pretens ioner has a t ube contai ning propell ant and a pis ton. The pis t on is at t ached t o a s t eel cable, the oppos it e endof which i s att ached t o t he s afety bel t buckle. A squib in the bas e of the tube provi des an ignit ion s ource when t ri ggeredby a fire s ignal from t he RCM. On recei pt of a fi re s i gnal from the RCM, t he s qui b igni tes t he propell ant . The propell antproduces ni trogen gas that rapi dl y expands t o dri ve t he pis ton al ong the t ube, pul ling the cable and drawing t he buckl edownwards .
Steering Column Pyrotechnic Device
NAS market vehicles ; a pyrot echnic device i s fit ted t o t he s teering column t o provi de increas ed energy absorpti on to adri ver not weari ng a s afet y belt . If t he dri ver i s weari ng a s afet y belt and a cras h s i tuati on occurs, t he devi ce is notact ivat ed. Refer t o s t eering column sect ion for furt her informati on.

Publi s hed: 11-May-2011
Supplemental Restraint System - Air Bag Supplemental Restraint System
(SRS)
Diagnosi s and Tes ti ng
Principles of Operation
For a detail ed descripti on of the ai r bag s upplement al res traints sys tem, refer t o the rel evant Des cript ion and Operat ions ect ion i n t he works hop manual .REFER to: Ai r Bag and Safety Bel t Pretens ioner Suppl ement al Res t raint Sys tem (SRS) (501-20B Suppl ement al Res t rai ntSyst em, Des cript ion and Operat ion).
Inspection and Verification
W ARNING: TO AVOID ACCIDENTAL DEPLOY MENT AND POSSIBLE PERSONAL INJURY , THE BACKUP POWER SUPPLYMUST BE DEPLETED BEFORE REPAIRING OR REPLACING ANY AIR BAG SUPPLEMENTAL RESTRAINT SYSTEM (SRS)COMPONENTS. TO DEPLETE THE BACKUP POW ER SUPPLY ENERGY , DISCONNECT THE BATTERY GRO UND CABLE AND W AITTW O MINUTES. FAILURE TO FOLLOW THIS INSTRUCTION MAY RESULT IN PERSONAL INJURY .
CAUTION: Di agnos is by s ubs ti tut ion from a donor vehicle is NO T acceptabl e. Subs ti tut ion of cont rol modules doesnot guarant ee confirmat ion of a faul t, and may als o caus e addit ional fault s i n t he vehi cl e being t est ed and/or t he donorvehi cl e.
• NOTE: Given t he l egal impl icati ons of a res t raint s s ys t em fail ure, harness repairs to Air Bag module ci rcuit s are notacceptable. W here t he t ext refers to "REPAIR the circui t", t hi s wi ll normal ly mean the repl acement of a harnes s .
1. Verify t he cus t omer concern.1.
2. Vis ually ins pect for obvious s igns of damage.2.
Visual Inspection
ElectricalBatt ery condit ion, s tat e of chargeMake s ure al l elect rical connect or(s) are engaged correct ly on the ai r bag ci rcuit sW iri ng harnes sAir bag modul e(s )Make s ure the rest rai nts control modul e (RCM) is correct ly ins tall edFuse(s )Sensor(s )Pret ensi oner(s )W arning l amp bulb(s)
3. If an obvious cause for an obs erved or report ed concern is found, correct t he caus e (if pos s ible) beforeproceeding t o t he next s t ep3.
4. If t he caus e is not vis ually evi dent , check Rest rai nts Cont rol Modul e (RCM) and Occupancy Cl ass i ficat ion Syst em(OCS) module for Diagnos t ic Troubl e Codes (DTCs ) and refer t o t he DTC Index.4.
Given t he complexit y of the s ys tem and the pot enti al for damage/injury, t he preferred met hod of di agnos is i s via theManufacturer approved diagnost ic sys tem.
If the Manufacturer approved di agnos ti c s ys t em i s not avai lable, use a s can tool to ext ract DTCs and refer to the DTCIndex.
DTC Index
• NOTE: If the control modul e is sus pect and t he vehicle remains under manufact urer warranty, refer to the W arrant y Poli cyand Procedures manual (s ect ion B1.2), or determine i f any prior approval programme is i n operat ion, prior t o t heins t al lat ion of a new modul e.
• NOTE: Generic scan t ool s may not read the codes li st ed, or may read only fi ve digit codes . Mat ch the five di git s from t hes can tool to the firs t fi ve di git s of the seven digi t code l is ted to ident ify t he faul t (t he las t t wo digi ts gi ve addi ti onalinformat ion read by the manufact urer approved diagnos t ic s ys tem).
• NOTE: W hen performing el ect ri cal volt age or resi s tance tes t s, al ways us e a digit al mult imet er (DMM) accurate to threedeci mal places , and wi th an up-to-date cali brat ion cert ificate. W hen t es ti ng res is t ance, always take t he res i st ance of t heDMM leads int o account.
• NOTE: Check and recti fy bas ic faul ts before beginni ng diagnos t ic rout ines i nvol vi ng pinpoint t es t s.
• NOTE: Ins pect connect ors for s igns of water ingres s , and pins for damage and/or corros ion.
• NOTE: If DTCs are recorded and, aft er performi ng the pi npoi nt tes ts , a fault is not present , an int ermi tt ent concern maybe t he caus e. Always check for loose connect ions and corroded terminals .
For a compl ete lis t of all Di agnos ti c Trouble Codes (DTCs) t hat could be logged on this vehicle, pleas e refer to Sect ion100-00
REFER to: Di agnos ti c Trouble Code (DTC) Index - DTC: Res trai nts Cont rol Module (RCM) (100-00 General Informati on,Des cript ion and Operat ion).

Publi s hed: 11-May-2011
Supplemental Restraint System - Restraints Control Module (RCM)
Removal and Inst all ati on
Removal
• NOTE: The RCM must be replaced aft er every ti me any SRS component has been deploye d.
Make t he SRS s ys t em s afe.
Refer t o: Standard W orks hop Pract ices (100-00 General Informat ion,
Des cript ion and Operat ion).
1.
Remove t he fl oor consol e.
Refer t o: Fl oor Cons ole (501-12 Inst rument Panel and Cons ole,
Removal and Ins tall ati on).
2.
Cut t he carpet for acces s. Pos it ion t he carpet as i de for acces s .3.
T orque: 10 Nm 4.
Installation To i nst all , revers e t he removal procedure.
1.
Us ing Land Rover approved di agnos ti c equi pment , programme a new
RCM.
2.

Publi s hed: 11-May-2011
Supplemental Restraint System - Driver Air Bag Module
Removal and Inst all ati on
Special T ool(s) 501-106
Remover, Driver Air Bag
Removal Di sconnect t he bat t ery ground cable.
Refer t o: Specificati ons (414-00 Bat tery and Charging Sys tem -
General Informat ion, Specificati ons).
1.
Make t he SRS s ys t em s afe.
Refer t o: Standard W orks hop Pract ices (100-00 General Informat ion,
Des cript ion and Operat ion).
2.
Carefully releas e t he 2 cli ps. Us ing t he s peci al t ool, remove the driver air bag module.
Speci al Tool (s ): 501-106 3.
4. W ARNING: Do not probe s uppl ement al res traint
s yst em (SRS) electrical connect ors .
Di sconnect t he 3 electrical connect ors . 4.
Installation

1. W ARNINGS:
The SRS el ect ri cal connectors are uni que. DO NOT force, orat tempt t o connect electrical connect ors t o t he wrong socket s .
Driver air bag module ins tall ati on can be confirmed by heari ng2 audibl e clicks , 1 for each s pring. The module edges s houl d als o beflus h wit h t he s teering wheel.
• NOTE: If the SRS component is t o be replaced, t he bar code of t henew unit must be recorded.
To i nst all , revers e t he removal procedure.
1.

Publi s hed: 11-May-2011
Supplemental Restraint System - Driver Lower Air Bag Module
Removal and Inst all ati on
Removal
• NOTE: Removal s t eps in t his procedure may cont ain i nst all ati on det ail s.
Make t he SRS s ys t em s afe.
Refer t o: Standard W orks hop Pract ices (100-00 General Informat ion,
Des cript ion and Operat ion).
1. Releas e t he s teeri ng col umn l ever and rai s e the col umn
for acces s .
2. 3.
NOTE: If t he SRS component i s to be repl aced, the
bar code of t he new unit must be recorded.
T orque: 6 Nm 3.