LAND ROVER FRELANDER 2 2006 Repair Manual

T orque:
40 Nm 5.
Installation To i nst all , revers e t he removal procedure.
1.

Publi s hed: 11-May-2011
Safety Belt System - Rear Safety Belt Buckle
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. T orque:
55 Nm 1.
Installation To i nst all , revers e t he removal procedure.
1.

Publi s hed: 11-May-2011
Supplemental Restraint System -
Torque SpecificationsDescriptionNmlb-ft
B-pi ll ar si de impact s ens or Torx s crews107
C-pi ll ar si de impact s ens or Torx bolt s107Driver lower air bag module64
Front i mpact s everit y s ensor Torx bol ts107
Pas senger ai r bag module bracket Torx s crews75Pas senger ai r bag module nut s107
Res traints cont rol module (RCM) Torx s crews107
Side ai r bag module nut s107Side ai r curtai n module Torx s crews107

Publi s hed: 11-May-2011
Supplemental Restraint System - Air Bag and Safety Belt Pretensioner
Supplemental Restraint System (SRS)
Des cript ion and Operat ion
COMPONENT LOCATION SHEET 1 OF 2
ItemPart NumberDescription
1-Pas s enger air bag
2-Adapt ive s teering column3-Clocks pri ng
4-Dri ver air bag
5-Dri ver l ower ai r bag6-Res t raint s Control Modul e (RCM)
7-Pas s enger air bag deacti vat ion s wi tch
COMPONENT LOCATION SHEET 2 OF 2

ItemPart NumberDescription
1-Si de air bag2-Si de air curt ain
3-Driver s eat pos it ion sens or
4-Si de impact s ens or – C-pil lar5-Si de impact s ens or - C-pi ll ar
6-Si de air bag
7-Si de air curt ain8-Si de impact s ens or - B-pi ll ar
9-Safety belt pretens ioners
10-Impact s ens or - front11-Impact s ens or - front
12-Si de impact s ens or - B-pi ll ar
OVERVIEW
W ARNING: All pyrotechnic devices are dangerous. Before performing any procedures on any pyrot echnic device, readall i nformat ion contai ned wit hin t he Standard W orks hop Practi ces s ecti on of thi s manual .For addit ional informat ion, refer t o: Standard W orks hop Practi ces (100-00 General Informat ion, Descripti on and Operat ion).(100-00, Des cript ion and O perati on).
The cont inued devel opment of t he Suppl emental Rest rai nt Sys t em (SRS) provi des an improved overal l level of cras hprot ect ion for vehi cl e occupant s . The s ys t em analyzes the occupancy s cenari o and cras h s everit y before act ivat ing t heappropri at e s afet y devi ces to bet ter prot ect a range of occupants i n a variety of cras h si tuat ions. Benefi ts of t he s yst eminclude:

Opti mi zat ion of t he depl oyment rest rai nt devi ces and t he reducti on in pot enti al for ai r bag induced injuries .The s ignificant reduct ion i n pas senger ai r bag depl oyment s ; parti cul arl y when pass enger s eats are unoccupied.
There are s even s eparat e air bags, each des igned wit h a specific prot ect ion funct ion:
Dri ver and front pas senger air bags provide head and ches t prot ect ion for front occupant s .Dri ver and front pas senger si de air bags provide protecti on agai nst si de impact.Side ai r curtains provi de prot ect ion agains t head impact and rol l-over eject ion for bot h front and rear occupant s .A driver lower air bag provides protecti on to the driver's legs from the st eering col umn s upport st ruct ures.
In order to s upport t he SRS requi rement s, rest rai nt cont rol archit ect ure i s us ed compris ing the foll owi ng s yst ems orcomponents :
All elect ronic front and s ide cras h s ens ing and advanced res t rai nt s management.Dri ver ai r bag wit h t win st age inflator.Pass enger ai r bag wit h t win st age inflator.Dependi ng on market , a front pas s enger s eat:- occupant cl ass ificati on s ens i ng s ys t em, or- occupant det ect ion sens ing s ys tem.Safet y bel t buckle pret ens ioners .A s eat posi ti on s ens or on t he dri ver s eat.Dependi ng on market ; a pyrot echnic actuat or fit t ed to the s t eering column to provide i ncreas ed energy abs orpti on.
CONTROL DIAGRAM
• NOTE: A = Hardwi red; D = Hi gh s peed controller area net work (CAN) bus .

ItemPart NumberDescription
1-Drivers s afet y belt pret ensi oner2-Pas senger safety belt pretens ioner
3-Inst rument clus ter
4-Engine Control Modul e (ECM)5-Belt -minder sens or – market s peci fi c
6-Safet y belt t ens i on sens or – market s peci fi c
7-Batt ery8-Occupancy s ens or
9-Occupancy s ens or module
10-Central Junct ion Box (CJB)11-Res traints Cont rol Module (RCM)

12-Seat pos i ti on sens or
13-Pas senger ai r bag deact ivati on s wit ch
14-Driver safety belt buckle s wi tch15-Pas senger safety belt buckle s wi tch
16-Impact s ens or - l eft -hand front
17-Impact s ens or - right -hand front18-Side impact sens or - left -hand B-pil lar
19-Side impact sens or - ri ght -hand B-pill ar
20-Side impact sens or - left -hand C-pil lar21-Side impact sens or - ri ght -hand C-pill ar
22-Driver lower air bag
23-Adapti ve st eeri ng col umn24-Side ai r bag – l eft-hand
25-Side ai r bag – right-hand
26-Clockspring27-Pas senger ai r bag
28-Driver ai r bag
29-Curt ain ai r bag – l eft-hand30-Curt ain ai r bag – right-hand
PRINCIPLES OF OPERATION
Crash Sensing
Impact s ensor
The impact s ens ors are i nst all ed in the front and both si des of the vehicle. W hen the i gni ti on is swi tched on t he Res trai ntsControl Module (RCM), s uppli es power to t he i mpact s ensors which perform a s elf t es t. After s ati sfact ory sel f tes t theimpact s ens ors cont inually out put 'digi tal accelerat ion' mes s ages t o t he res t raint s cont rol module. The us e of mult ipl eimpact s ens ors provide s hort er ai r bag trigger ti mes t hrough fas t er det ect ion of l ateral and l ongit udinal accelerat ion andals o i mproves detecti on accuracy.
Each impact sens or incorporat es an acceleromet er and a mi crochi p powered by a feed from the res traints cont rol module.Accelerati on is evaluat ed by the microchip and t rans mi tt ed t o the res traints cont rol module, which t hen makes the decis ionon whether or not to act ivate the ai r bags and pretens ioners .
If a fault is detect ed the relevant impact sens or sends a fault mes s age, i ns t ead of the di gi tal accel erati on mes s age, t ot he res traint s cont rol module. The RCM t hen s tores a rel ated fault code and il luminat es the ai r bag warning indicator.Faul ts can be ret rieved by t he Land Rover approved diagnos t ic s ys tem from t he RCM via t he high-s peed CAN.
Occupant Monitoring
There are t wo t ypes of occupant monit oring s ys tems fi tt ed to vehi cl es:
1. NAS market s , have an O ccupant Classification Sensing System.1.
2. Markets except NAS and Aust ral ia, have an Occupant Detection Sensing System.2.
1. Occupant Classification Sensing System

ItemPart NumberDescription
1-Safet y bel t t ens ion sens or2-Occupancy sens or
3-Occupancy sens or modul e
In NAS market s where safety bel t us e is i nfrequent, addit ional technol ogy i s us ed to cl ass i fy t he occupant of the frontpass enger s eat. The occupant clas si fi cat ion s ens ing s yst em provides s eat l oad dat a to t he Res trai nts Cont rol Module(RCM).
The occupant cl as s ificati on s ys t em consi s ts of:
A press ure pad, i ns t alled under t he cus hion of t he front pas s enger s eat, whi ch is connected to a pres s ure s ensor.A s afet y belt t ensi on s ens or, i ntegrat ed int o t he anchor point of the front pas senger safety bel t.An occupant cl ass i fi cat ion module, i ns t alled under t he front pas s enger s eat .
The pres s ure pad i s a s il icone fi ll ed bladder. Any load on the pres s ure pad is det ect ed by the pres sure s ens or. The s afet ybelt t ens i on sens or is a st rai n gauge which meas ures t he load appli ed by t he safety bel t anchor to the anchor bolt . Thes ens or is locat ed i n the lower s afety bel t anchor poi nt.
The occupancy s ens or responds t o weight changes on t he pass enger seat and provides an appropriate s ignal t o t heoccupancy s ens or modul e. In addit ion, the bel t tens ion s ens or provi des a s eparate i nput t o t he occupancy sens or modul e.The module proces s es the i nput s i gnal s received from the s ensors and forwards an appropriat e s ignal t o t he RCM on thehigh-s peed CAN.
The RCM moni tors and process es t he data from t hes e and s everal other s ens ors , before making an ai r bag depl oymentdeci si on. The sys tem is des igned t o t ake account of s everal variables i n addit ion t o weight , including: incli nat ion of t hevehi cl e and exact pos it ion and s t ructure of the wei ght on the seat .
This prot ects agains t inadvert ent ai r bag deployment , for exampl e, if t he s eat were occupied by an infant i n a boos ter

s eat , or an unres trained but very l ightwei ght adult , in bot h t hes e cas es the ai r bag would be di sabl ed. The occupantclas si fi cat ion s ens ing s yst em forms part of a s t rat egy t o control pas s enger air bag deployment depending on theoccupancy s cenario.
The occupant cl as s ificati on s ys t em has four pos s ible st ates :
Seat Empty: t he pass enger ai r bag, pas senger-s ide air bag and pas s enger s afety bel t buckle and pretens ioneroperati on is di s abl ed; t he pas senger air bag deact ivati on indicator i s not il luminated.Occupied Inhibit: when the seat is occupied by a smal l pers on, t he pass enger ai r bag, pas senger-s ide air bag andpass enger s afet y belt buckl e and pret ensi oner operat ion i s dis abled; the pas s enger air bag deact ivat ion i ndi cat or isil lumi nat ed.Occupied Allow: when t he s eat i s occupied by a large pers on; t he pas senger ai r bag and pass enger-s ide air bagoperati on is enabled, t he pas s enger ai r bag deacti vat ion i ndicat or is not i ll uminated. Pass enger s afet y belt andpret ens i oner operati on s tat us depends on t he s afet y bel t buckle s tat us :- acti ve for buckled,- inacti ve for unbuckled.Error: if a sys tem faul t is det ect ed; t he pas senger ai r bag is enabled t o deploy at 'st age-1' onl y, refer t o Air BagDual St age Inflat ors below. Pas senger-s ide air bag operat ion i s als o enabled; t he pas s enger air bag deacti vat ionindicat or i s not il lumi nat ed. Pas s enger s afety bel t and pret ens ioner operati on s tat us depends on t he s afety bel tbuckle s tat us :- acti ve for buckled,- inacti ve for unbuckled.
Occupancy Sensor Mod ule
The occupancy s ens or modul e is ins tall ed on t he undersi de of the front pas s enger s eat . The module s upplies a power feedt o the occupancy s ens or and monit ors the return vol tage t o det ermi ne if t he s eat i s occupied or not . The res ult ist ransmit ted t o t he RCM on the hi gh-s peed CAN. The occupancy s ens or module al so monitors for s hort and open circui ts int he occupancy s ensor. If i t det ect s a fault , the occupancy s ens or module t rans mi ts a fault mess age t o t he RCM.
Safety Belt Tension Sensor
The s afety bel t tens ion s ens or i s a s t rai n-gauge type, encapsul at ed wi thi n the pas s enger s afet y belt anchor. The sens orconvert s t he force appl ied t o t he s afety bel t int o an elect rical s ignal. In the event t hat a chi ld-s eat is ins tall ed onto thefront pas s enger s eat, t he force appl ied t o t he pass enger s afet y belt i s reflected by the out put s i gnal from the s ensor,which provi des dat a t o s uppl ement that received from the occupancy s ens or. The occupancy sens or modul e proces ses t heinput data and makes i t avai lable to the rest rai nts control modul e, whi ch then makes t he neces s ary adjus t ments i nres pect of pas senger air bag deployment .
2. Occupant Detection Sensing System
The belt -mi nder s ens or and a safety bel t buckle s wi tch are us ed to warn t he dri ver if the front pas s enger s eat i s occupiedwit hout the s afet y belt being engaged.
Belt Minder Sensor
The occupancy s ens or i s ins t al led i n t he cus hion of t he front pass enger s eat between t he foam paddi ng and the cover. Thes ens or cons is t s of a foil cont act circui t, embedded in a plas t ic s heet . W ei ght on the s ensor reduces t he res is t ance of t hecircuit .
The s afety bel t buckle swit ch provi des an output s ignal in respons e t o the ins ert ion of t he safety bel t tongue int o t hebuckle. The out put s ignal from t he s wit ch is used by the RCM to det ermi ne whether t he front seat occupants are correct lyres t rained. The s wit ch si gnal i s us ed in conjuncti on wit h t he belt mi nder s ensor t o ens ure t hat ai r bag and s afety bel tdepl oyment onl y occurs when the s eat is occupi ed.
Driver Position Sensing System
Seat Position Sensor