fuel filter LAND ROVER FRELANDER 2 2006 Repair Manual

s tored on open ground coul d eit her leak or have contami nati ng subs tances was hed off them that would cont aminate theland. Always s tore t hes e materi als i n s uit abl e s kips or s imi larly robus t cont ainers .
Legal compliance
Some s it es may have a di scharge cons ent for effl uent di scharge t o t he foul drai n for a car was h et c. It is ess enti al t o knowt he types of effluent which are al lowed t o be di scharged i nto t he drai n and t o check t he res ult s of any monit ori ng carri edout by the W ater Company.
W here paint s praying operat ions are carried out i t may be necess ary to apply to the Local Aut horit y for an ai r emis s ionsli cence t o operate the pl ant . If such a licence is necess ary, addit ional precaut ions wil l be neces s ary t o comply wi th therequirements and t he resul ts of any air quali ty moni toring mus t be checked regul arl y.
Checkli s t
Alw ays adhere to the following:
Know what legal cons ents and l icences apply t o t he operat ions.
Check t hat the emis s ions and dis charges compl y wit h l egal requi rements .
Waste Management
Pollut ion can be reduced by careful handli ng, s t orage and dis posal of all was te materials that occur on s it es. Legis lat ionmakes it i ll egal t o dis pose of was t e mat eri al s other t han to licens ed wast e carriers and dis pos al s it es.
This means t hat it i s neces sary t o not onl y know what the wast e mat eri al s are but als o to have the neces s arydocument at ion and licences .
Handl ing and s t orage of was te
Ensure t hat was t e mat erial s are not poured down the drai n or on t o s oil and are st ored in s uch a way t hat they do notes cape on t o l and or soi l.
All was te mus t be s egregat ed int o i ndi vi dual t ypes e.g. oils , met als , bat t eries , s crap component s etc. This wi ll prevent anyreacti on between di fferent materials and as s is t i n dis posal .
Dis pos al of was te
Dis pos e of wast e i n accordance wi th t he followi ng guidelines :
Fuel, hydraulic fluid, anti-freeze and oil: Keep s eparate and dis pos e of t o s peci alis t contract ors .
Refrigerant: Col lect in s peci ali st equipment and reus e.
Detergents: Safe to pour down t he foul drai n if di luted.
Paint, thinners: Keep separat e and dis pose of to speciali st contract or.
Components: Return t o s uppl ier for refurbi shment or dis as sembl e and reus e any s uit able part s . Dis pose ofremai nder i n ordi nary was te.
Small parts: Reuse any sui table parts , dis pos e of the remainder in ordinary was t e.
Metals: Can be s old i f separat e from general was t e.
T yres: Keep s eparate and di s pos e of t o s peci al is t cont ract or. DO NO T att empt to dis pos e of t yres by burni ng.
Components/materials containing asbestos: Keep separat e and dis pose of to speciali st contract or.
Oil and fuel wastes (e.g. rags, used spill kit material): Keep s eparate and dis pos e of t o s peci alis t contract ors .
Air filters: Keep s eparat e and dis pose of to s peciali st contract ors .
Rubber/plastics: Dis pos e of i n ordi nary was te.
Hoses: Di s pos e of i n ordinary was te.
Batteries: Keep separat e and dis pose of to speciali st contract ors .
Air bags - DANGER EXPLOSIVES: Keep s eparate and dis pos e of t o s peci alis t contract ors .
Electrical components: Return to suppli er for refurbis hment or dis ass emble and reus e any s uit abl e components .Dis pos e of remai nder in ordinary wast e.
Catalytic converters: May be s ol d i f kept s eparate from general wast e.
Packaging: Compact/recycl e as much as pos s ible and di s pos e of i n ordinary was te.
Office/paper waste: Recycl e paper and t oner and i nk cart ridges , dis pos e of remainder in ordinary was t e.
Noise
Car alarm t es t ing, panel beati ng, runni ng engi nes , us ing ai r tools et c. are operat ions which i nvariably produce a largeamount of noi se. The l ocati on of s uch act ivit ies and als o the t ime of day must be carefull y cons idered havi ng regard to theproximit y of hous es s chools et c.

1. Check for free play i n all s uspens ion and body mounti ng rubbers .
2. Check condit ion of s uspens ion rubber boot s and gait ers .
Fuel System
Check fuel sys tem pipes , hos es and unions for chafi ng, l eaks and corros ion.
Electrical Harnesses
Check al l el ect ri cal harnes s es for chafing.
Oil/Fluid Leaks
Check for oil/fluid leaks .
Power Steering
Check power s teering rod bal l joi nt fixi ngs , gait ers and condi ti on of bal l joi nt s and dus t covers .Check power s teering pipes , hos es and unions for chafi ng, leaks and corros ion.
Exhaust System
Check exhaust s ys tem for l eaks , securi ty and damage.
Fault Lamp(s)
If fault l amp(s ) are ill uminat ed, t est the as s oci at ed s yst em us i ng T4 and report findings .
Road Test
Carry out road t est of vehicle.For addit ional informat ion, refer t o: Road/Roller Tes ti ng (100-00 General Informati on, Des cri pt ion and Operati on).
General
Endors e Service Record.Report any unus ual features of vehi cl e condi ti on and any addi ti onal work required.
Vehicles Operating Under Arduous Conditions
Service i ntervals for vehi cles operati ng under arduous condi ti ons are det ailed bel ow.
Braking system
CAUTION: When vehicles are operating under arduous conditions, the following service items must be carriedout every 3 months or 3,750 miles (6,000 km).
Ins pect front brake pads for wear.Ins pect rear pads for wear.Check brake cal ipers for s igns of fl ui d l eaks .Check brake dis cs for condi ti on.Check al l brake boos t er and brake s ys t em pipes and hos es for condi ti on, chafi ng and leaks.Clean road wheel hub s pigot s and appl y greas e, Land Rover Part Number RY L 105020 t o t he wheel mat ing surfaceof each s pigot .
Brake Fluid Replacement
CAUTION: When vehicles are operating under arduous conditions, the following service item must be carried outevery 2 Years or 30,000 miles (48,000 km).
Replace brake fluid.
Road Wheel Speed Sensors
CAUTION: When vehicles are operating under arduous conditions, the following service item must be carried outevery 3 months or 3,750 miles (6,000 km).
Ins pect the road wheel s peed s ens or harness es for damage.
Engine Oil and Filter
CAUTION: When vehicles are operating under arduous conditions, the following service item must be carried outevery 3 months or 3,750 miles (6,000 km).
Renew engi ne oil and fil ter.

Ensure that the steering wheel is in the straight ahead position, do not turn the st eering w heel prior to checking the
fluid level.
Check t hat the flui d level is t o t he mi d-way mark between the MAX and MIN marks on t he fluid res ervoir, t op-up i f
neces s ary. Clean t he area around the res ervoi r fi ll er cap, remove cap.
CAUTION:
Do not fill reservoir above the MAX mark.
If necess ary, t op-up us ing t he recommended fluid to the mid-way mark on the reservoi r.
For addit ional informat ion, refer t o: Specificati ons (211-02 Power St eering, Specificati ons).
Ins t all the res ervoir fill er cap.
Windshield Washer Reservoir
Remove the winds hi eld was her res ervoir fill er cap.
Top-up t he res ervoir us ing a mi xt ure of an approved wi nds hiel d was her flui d and wate
r unti l the level i s t o the
bott om of t he gauze fil ter i n t he res ervoir fil ler neck. Ins t all the res ervoir fill er cap.
Engine Oil and Filter
• CAUTIO NS: For vehi cl es operati ng under arduous condi ti ons see relevant secti on.

Vehicles operating on high sulphur content fuel - above 0.7%, the oil and filter cha nge period MUST NOT
exceed 3 months or 3,750 miles (6,000 km).
Vehicles operating on moderate sulphur content fuel - 0.3 to 0.7%, the oil and filte r change period MUST NOT
exceed 6 months or 7,500 miles (12,000 km).
Renew engi ne oil and fil ter.
For addit ional informat ion, refer t o: Oil Fil ter El ement (303-01A Engine - I6 3.2L Pet rol , Removal and Ins t allat ion).
Air Filtering
CAUTION: For vehi cl es operati ng under arduous condi ti ons s ee relevant s ecti on.
1. Every 2 years or 30,000 miles (48,000 km): Replace the ai r cl eaner element .
For addit ional informat ion, refer t o: Air Cl eaner (303-12B Int ake Ai r Dis t ri but ion and Fi lt ering - TD4 2.2L Di es el, Removal
and Ins t allat ion).
Fuel Filter
1. Every year or 15,000 miles (24,000 km): Drai n water from the fuel fi lt er.
1. Every 2 years or 30,000 miles (48,000 km): Replace fuel fi lt er el ement.
For addit ional informat ion, refer t o: Fuel Fil ter (310-01B Fuel Tank and Lines - TD4 2.2L Dies el, Removal and Ins tall ati on).
Automatic Transmission
Every 10 years or 150,000 miles (240,000 km): Renew automat ic t rans mis s ion flui d.

Ins pect rear pads for wear.
Check brake cal ipers for s igns of fl ui d l eaks .
Check brake dis cs for condi ti on.
Check al l brake boos t er and brake s ys t em pipes and hos es for condi ti on, chafi ng and
leaks.Clean road wheel hub s pigot s and appl y greas e, Land Rover Part Number RY L 105020 t o
t he wheel mat ing surface
of each s pigot . Brake Fluid Replacement
CAUTION:
When vehicles are operating under arduous conditions, the following service item mus t be carried out
every 2 Years or 30,000 miles (48,000 km).
Replace brake fluid. Road Wheel Speed Sensors
CAUTION:
When vehicles are operating under arduous conditions, the following service item mus t be carried out
every 3 months or 3,750 miles (6,000 km).
Ins pect the road wheel s peed s ens or harness es for damage. Engine Oil and Filter
• CAUTIO NS:
When vehicles are operating under arduous conditions, the following service item mus t be carried out every 3
months or 3,750 miles (6,000 km).
Vehicles operating on high sulphur content fuel - above 0.7%, the oil and filter cha nge period MUST NOT
exceed 3 months or 3,750 miles (6,000 km).
Vehicles operating on moderate sulphur content fuel - 0.3 to 0.7%, the oil and filte r change period MUST NOT
exceed 6 months or 7,500 miles (12,000 km).
Renew engi ne oil and fil ter. Air Filtering
CAUTION:
When vehicles are operating under arduous conditions, the following service item mus t be carried out
every 12 months or 15,000 miles (24,000 km).
Replace the ai r fi lt er el ement.
For addit ional informat ion, refer t o: Air Cl eaner (303-12A Int ake Ai r Dis t ri but ion and Fi lt ering - I6 3.2L Petrol ,
Removal and Inst all ati on). Accessory Drive Belt
CAUTION:
When vehicles are operating under arduous conditions, the following service item mus t be carried out
every 5 years or 75,000 miles (120,000 km).
Replace the access ory drive bel t. For addi ti onal informat ion, refer to: Acces s ory Drive Belt (303-05A Acces s ory Drive
- I6 3.2L Pet rol, Removal and Ins tal lat ion). Camshaft Timing Belt, Tensioner and Pulley
CAUTION:
When vehicles are operating under arduous conditions, the following service item mus t be carried out
every 4 years or 60,000 miles (96,000 km).
Replace the cams haft t iming belt , tens ioner and pul ley.
For addit ional informat ion, refer t o: Timi ng Belt (303-01B Engi ne - TD4 2.2L Dies el, Removal and Inst all ati on).
Radiator/Charge Air Cooler and Cooling Fan
CAUTION:
When vehicles are operating under arduous conditions, the following items must be ca rried out.
Vis uall y check t he radiat or/charge air cool er for ext ernal obst ruct ions, check cooli ng fan bl ades for damage.Remove any debris from t he charge air cool er us i ng a l ow pres s ure hos e.
Continuous Use In Severe Off-Road Conditions
CAUTION:
After 50 miles (80 km) continuous use in severe off-road conditions i.e. w ading, dee p mud and
abrasive grit/slurry, the following items must be cleaned and inspected.

The parking brake.
The acces sory dri ve belt .
Vehicles used in dusty or field conditions or d eep wading:
More frequent att enti on to the ai r cl eaner wi ll be requi red. Fuel Filter
CAUTION:
When vehicles are operating under arduous conditions, the following service item mus t be carried out
every 3 months or 3,750 miles (6,000 km).
Drai n wat er from t he fuel fi lt er. Poor Fuel Quality
CAUTION:
When vehicles are operating under arduous conditions, the following service item mus t be carried out
every 3 months or 3,750 miles (6,000 km).
W here vehi cl es are us ed i n t hes e areas , t he fuel fi lt er may require drai ning at more frequent i nterval s.Additional Items That May Require Attention
1. Every 6 years: It i s recommended t hat al l brake fl uid hydrauli c s eal s are replaced.
• NOTE: This i s in addi ti on to the maintenance requirement that fl exi ble brake hos es MUST be replaced at thi s s ervice
int erval.

Publi s hed: 11-May-2011
Evaporative Emissions - Fuel Tank Leakage Monitoring Pump Filter
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.
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.
2. W ARNING: Do not work on or under a vehi cle s upported onl y
by a jack. Al ways support t he vehi cl e on s afet y s tands .
Rais e and s upport t he vehi cl e.
2.
Remove t he rear wheel.
Refer t o: W heel and Ti re (204-04 W heel s and Tires, Removal and
Inst all at ion).
3. 4.

SymptomPossible CauseAction
Di fficul t t o s tart aft er hots oak (vehicle st andi ng,engine off, aft er engi ne hasreached operati ngt emperature)
Injector leakElectronic engine controlsFuel pumpExhaus t gas recircul ati on val ves tuck open
Check fuel and engine control sys tems for DTCs andrefer t o t he rel evant DTC Index
Engine cranks t oo fas t/s lowBatt eryCompres s ions high/lowSt arti ng s yst em
Check batt ery is fully charged and in s ervi ceablecondit ion. Check engine compres s ions . Checkint egrit y of s tart ing sys tem
Driveability
Rough idl eLow/contami nat ed fuelFuel s ys temAir i ntake s yst emElectronic engine controls
Check fuel l evel /condi ti on. Check for DTCs and referto relevant DTC Index. Check i ntegri ty of fuel, airint ake, and engi ne s yst ems
Engine i dl e s peed high, low,errati cAir i ntake s yst emExces s ive blow-byExhaus t gas recircul ati on val veTurbo charger bearing/sealElectronic engine controls
Check for DTCs and refer t o t he rel evant DTC Index.Check i nt egri ty of ai r intake, Turbo charger, andengi ne s ys t ems
Lack of power underaccel erati onContami nat ed fuelAir i ntake s yst emBlocked exhaus t/cat alyt icconverterTurbo changer faul tFuel s ys temElectronic engine controlsLow engine compres s ions
Check for fuel cont aminati on. Check for DTCs andrefer t o relevant DTC Index. Check int egrit y of airint ake, exhaus t, Turbo charger, and engi ne s ys t ems
Engine s t ops /st all sContami nat ed fuelFuel s ys temAir i ntake s yst emElectronic engine controls
Check for fuel cont aminati on. Check for DTCs andrefer t o t he rel evant DTC Index. Check int egrit y offuel, ai r intake, and engi ne s ys t ems
Diesel Particulate Filter (DPF) Warning Messages
'DPF Ful l Vi s it Dealer'mes s age dis played. Torquederat e, regenerati on lockedout (DTC P200200 als ol ogged)
Part iculat e fi lt er soot mas squant it y above maximumt hres hol dCAUTION: All i nt ake air s yst em leaks MUST berecti fi ed before carrying out dynamic regenerat ion.
Check for and recti fy any related DTCs . Check forcorrect ins tal lati on and int egrit y of i nt ake airsys t em, recti fy as requi red. Carry out dynami cregenerati on usi ng t he manufacturer approveddiagnos t ic s yst em
'Reduced Engi nePerformance' mes s agedis played. No effect t odri veabi lit y. Regenerat ionreduced t o lower level (2)(DTC P054516 al so logged)
Pre-cat alyt ic convertert emperature s ens or circui tvolt age bel ow t hres hol d
Refer to elect rical circui t diagrams and checkpre-cat al yti c convert er temperat ure s ens or ci rcuitfor s hort t o ground or open ci rcuit
'Reduced Engi nePerformance' mes s agedis played. No effect t odri veabi lit y (DTC P222700als o l ogged)
At mospheri c pres s ure s ens ordefecti veClear DTC, run engine for 2 mi nut es, s et igni ti onst atus to O FF (power down), run engine for further2 mi nut es , set i gni ti on s tat us to OFF (power down),set i gni ti on s tat us to ON and read DTCs. If DTC s t illpres ent refer t o new module/component ins tal lati onnot e at t he t op of the DTC Index
'Reduced Engi nePerformance' or 'EngineSyst em Fault ' mes sagedis played. Torque derate,regenerat ion l ocked out(DTC P244A16 al so logged)
Part iculat e fi lt er different ialpres s ure bel ow li mitClear DTC, cycle i gni ti on s tat us from ON t o OFF(power down) a mi ni mum of s i x ti mes , set i gni ti onst atus to O N, if DTC remains i ns t all a newdifferent ial pres sure s ens or
'DPF Ful l Vi s it Dealer'mes s age dis played. Torquederat e, regenerati on lockedout (DTC P244B68 als ol ogged)
Part iculat e fi lt er different ialpres s ure hi gh - engi ne prot ect ionacti veCAUTION: All i nt ake air s yst em leaks MUST berecti fi ed before carrying out dynamic regenerat ion.
Check for correct ins tall ati on and int egrit y ofdifferent ial pres sure s ens or hoses , rect ify asrequired. Check for correct i ns t allat ion and i ntegri tyof intake ai r sys tem, rect ify as requi red. Carry outdynami c regenerati on us ing t he manufacturerapproved di agnos ti c s ys t em'Reduced Engi nePerformance' or 'EngineSyst em Fault ' mes sagedis played. Torque derate,regenerat ion l ocked out(DTC P244C00 al so logged)
Downs tream catalyt ic convertert emperature s ens or volt agebelow lower li mitSensor failure
Refer to the el ect ri cal circui t diagrams and checkdowns t ream cat al yti c convert er temperat ure sens orci rcuit for open ci rcuit . Ins tal l new temperat uresens or as required

12-'V' cl amp and gas ket
13-Turbocharger (ref only)
OVERVIEW
The 2.2L DW 12 exhaus t s ys t em i s fabricated from s tainl ess st eel and i s s uppl ied as two s eparat e as sembl ies ; a fronts ect ion i ncorporati ng a catalyt ic converter and a rear sect ion i ncorporat ing a rear s il encer.
In s ome market s , the exhaus t s yst em incorporates a Dies el Parti cul ate Fi lt er (DPF) which all ows the vehicl e to exceedEuropean Stage 4 emis s ion s tandards .
The s ys t em i s att ached to t he unders ide of t he body wit h s ix mount ing rubbers (fi ve mount ing rubbers on vehicles wi thoutDPF) which are locat ed on mild st eel hanger bars t hat are wel ded to t he s yst em. The mounti ng rubbers locat e oncorres pondi ng hangers which are welded or bolt ed to the unders i de of the vehicle body.
FRONT SECTION
The front sect ion has a flared end which mat es wit h a corres ponding feature on t he turbocharger. The joint i s s ecuredt oget her us ing a 'V' band cl amp s ealed wi th a gasket .
The fl ange is formed on a fabricated out let elbow whi ch in turn is wel ded to the de-coupler. The elbow i ncorporat es at hreaded bos s whi ch provi des the locat ion for the HO2S. The decoupl er, which provi des a fl exi ble joint, i s welded t o t hebody of the catal yt ic convert er.
Vehicles without DPF
A s hort front connecti ng pipe s ecti on from t he catalyt ic converter mat es wit h t he rear connect ing pipe of t he s yst em and iss ecured wit h a 'Torca' joint. A mounti ng rubber is l ocat ed near t o t he cat alys t and att aches t o a body hanger bracketmounted on the body.
Vehicles with DPF
The cat alyt ic converter has a flange and gasket joi nt which mat es wit h a fl ange on the DPF. The DPF outl et has a s hortfront connect ing pi pe which mat es wi th t he rear connect ing pipe of t he s yst em and is s ecured wi th flange joint. Twomounti ng rubbers are l ocated near t o t he cat alys t and att ach to a body hanger bracket mount ed on the body.
REAR SECTION
The rear s ect ion has l ong connecti ng pipe s ect ion whi ch mat es wit h t he front connecting pi pe behi nd the cat alyst or DPFand is secured wi th a 'Torca' joi nt. The pipe secti on is routed al ong the unders i de of the vehicle and connect s int o t heRight Hand (RH) end of t he rear muffl er.
The rear muffl er i s a fabri cat ed uni t wit h a capacit y of 29.3 l it ers . The muffler cont ains perforat ed baffl es and t ubes whi chreduce nois e as t he exhaus t gases pas s t hrough the si lencer. The exhaus t gas s es enter t he muffler at t he Right Hand (RH)end and exit via a pipe on t he Left Hand (LH) end. The exit pi pe faces the rear of the vehicle and is curved downwards t odirect exhaus t gas ses away from t he rear of the vehicle.
CATALYTIC CONVERTER
The oxidizing cat al yti c convert er, which has a capacit y of 2 li ters, i s fit ted i n t he front secti on of the exhaust sys tem, aftert he HO2S. The cat al yti c convert er is common t o vehicles wi th or wit hout t he DPF.
The HO2S moni tors the exhaust gas s es leavi ng t he engi ne. The engine management s ys t em us es t hi s informat ion t oprovide accuratel y met ered quant it ies of fuel t o t he combus t ion chambers t o ens ure the mos t efficient us e of fuel and t omi ni mi ze the exhaus t emi s si ons .
To furt her reduce t he carbon monoxi de and hydrocarbons content of t he exhaus t gas es , a catalyt ic converter i s int egratedint o t he front pi pe of the exhaust sys tem. In t he catalyt ic converter t he exhaus t gases are pass ed t hrough honeycombedceramic el ements coated wit h a s peci al surface t reatment call ed 'was hcoat '.
The was hcoat increas es the surface area of t he cerami c elements by a fact or of approximat ely 7000. On t op of thewas hcoat is a coat ing contai ni ng plat inum, which i s t he act ive const it uent for convert ing harmful emi ss i ons i nto inertby-products . The plat inum adds oxygen to t he carbon monoxide and t he hydrocarbons in t he exhaus t gases , t o convertt hem int o carbon dioxide and wat er res pect ively.
DIESEL PARTICULATE FILTER (if fitted)
The Dies el Parti cul ate Fi lt er (DPF) s ys t em reduces dies el parti cul at e emi s si ons to negl igible levels .
DPF Syst em Components

ItemPart NumberDescription
1-Temperat ure s ensor2-HO2S
3-Different ial pres s ure sens or
4-High pres sure s ens or pipe5-Low pres s ure sens or pi pe
6-Dies el part icul ate fi lt er
7-Temperat ure s ensorThe part iculate emis s ions are the bl ack fumes emi tt ed from the di es el engi ne under cert ain load condi ti ons . The emis s ionsare a complex mi xt ure of sol id and l iquid component s wi th the majori ty of t he part iculat es bei ng carbon mi crospheres onwhich hydrocarbons from t he engine's fuel and l ubricant condense.
The DPF s yst em compris es the foll owing component s:
Dies el parti cul ate fil terDPF cont rol s oft ware incorporated into the Engine Cont rol Module (ECM)Different ial pres s ure s ens or.
Diesel Particulate Filter
The DPF is locat ed i n t he exhaus t sys tem, downs tream of t he cat alyt ic converter. A major feature of the DPF i s i ts abil it yfor regenerat ion. Regenerat ion is t he burning of parti culat es t rapped by the fil ter t o prevent obst ructi on t o t he free fl ow ofexhaus t gass es . The regenerati on proces s t akes place at cal cul at ed i nt ervals and is not noti ceable by the driver of thevehi cl e.
Regenerat ion is mos t i mport ant , s ince an overfi ll ed fi lt er can damage t he engine t hrough exces si ve exhaus t back press ureand can it s el f be damaged or des t royed. The mat eri al t rapped i n t he fi lt er i s i n the most part carbon part icles wi th some

Acti ve regenerati on s tart s when t he part iculat e loading of t he DPF reaches a t hres hol d as moni tored or det ermi ned by theDPF cont rol s oft ware. The t hres hol d calcul ati on is bas ed on driving s t yl e, dis tance t ravel ed and back pres sure s ignals fromt he different ial pres sure s ens or.
Acti ve regenerati on general ly occurs every 450 mil es (725 km) al though thi s is dependant on how the vehicle is driven. Forexampl e, if t he vehi cl e i s dri ven at l ow l oads i n urban t raffi c regularly, act ive regenerat ion wil l occur more often. This i sdue t o the rapid bui ld-up of parti cul at es in the DPF than i f the vehicle is driven at high s peeds when pas s ive regenerat ionwil l have occurred.
The DPF s oft ware i ncorporates a mil eage trigger which is us ed as back-up for act ive regenerat ion. If act ive regenerat ionhas not been i nit iat ed by a back pres sure s ignal from t he different ial pres s ure s ensor, regenerati on is reques t ed based ondis t ance t raveled.
Acti ve regenerati on of the DPF i s commenced when the t emperat ure of t he DPF is increas ed to the combus ti on temperat ureof the parti cl es. The DPF t emperat ure i s rai s ed by increas ing t he exhaus t gas temperat ure. This is achieved by int roduci ngpost -injecti on of fuel aft er the pi lot and main fuel inject ions have occurred.
This i s determined by t he DPF s oft ware moni toring t he s ignals from t he two DPF temperature s ens ors to es t abl is h t het emperature of the DPF. Dependi ng on t he DPF temperat ure, t he DPF s oft ware reques t s the ECM t o perform ei ther one ort wo post -injecti ons of fuel:
The fi rs t pos t-inject ion of fuel ret ards combus ti on ins ide t he cylinder which i ncreas es t he temperature of theexhaus t gas.The s econd pos t-inject ion of fuel i s inject ed lat e in the power s troke cycle. The fuel part ly combus ts in t he cylinder,but some unburnt fuel als o pass es i nto t he exhaus t where it creat es an exot hermi c event wi thi n the cat alyti cconvert er, furt her i ncreas i ng the temperat ure of t he DPF.
The act ive regenerati on proces s t akes approxi matel y 20 mi nut es t o compl ete. The first phas e increas es the DPFt emperature to 500°C (932°F). The second phas e furt her increases t he DPF t emperat ure t o 600°C (1112°F) whi ch is t heopti mum t emperat ure for parti cle combust ion. This t emperat ure i s t hen maint ai ned for 15-20 minutes to ens ure compl et eincinerat ion of t he part icles wi thi n t he DPF. The i nci nerati on process convert s the carbon parti cl es to carbon dioxide andwater.
The act ive regenerati on temperat ure of t he DPF i s clos el y monit ored by the DPF s oftware to maint ain a target t emperat ureof 600°C (1112°F) at the DPF inlet . The temperat ure cont rol ensures that t he temperat ures do not exceed the operat ionalli mit s of t he turbocharger and t he cat alyti c convert er. The t urbocharger i nlet t emperature mus t not exceed 830°C (1526°F)and t he cat alyti c convert er bri ck t emperat ure mus t not exceed 800°C (1472°F) and t he exit t emperat ure mus t remainbelow 750°C (1382°F).
Duri ng the act ive regenerat ion proces s t he fol lowing ECM cont roll ed event s occur:
The t urbocharger is maint ai ned in the full y open pos it ion. This minimizes heat t ransmi ss i on from t he exhaus t gast o the turbocharger and reduces t he rate of exhaus t gas flow al lowing opt imum heati ng of the DPF. If the driverdemands an increas e in engi ne torque, t he t urbocharger wi ll res pond by clos ing t he vanes as necess ary.The t hrott le is clos ed as t his as s is ts in i ncreas i ng the exhaust gas t emperat ure and reduces t he rat e of exhaus tgas fl ow whi ch has t he effect of reduci ng the t ime for t he DPF t o reach t he opti mum temperat ure.The Exhaus t Gas Reci rculat ion (EGR) val ve is clos ed. The use of EGR decreas es t he exhaus t gas temperat ure andt herefore prevent s t he opti mum DPF t emperat ure being achieved.
If, due t o vehi cl e us age and/or drivi ng s tyle, t he act ive regenerat ion proces s cannot t ake place or is unable to regenerat et he DPF, t he dealer can force regenerat e t he DPF. Thi s is achieved by ei ther dri vi ng the vehicl e unti l t he engine i s at it snormal operat ing t emperature and t hen drivi ng for a furt her 20 minut es at speeds of not l ess than 30 mph (48 km/h) or byconnecti ng a Land Rover approved diagnost ic s ys tem to the vehicle which wi ll guide the t echnician t hrough a regenerat ionprocedure t o clean t he DPF.
Diesel Particulate Filter Control
The DPF requires cons t ant moni toring t o ens ure t hat it i s operati ng at it s opti mum effi ci ency and does not becomeblocked. The ECM contai ns DPF s oftware whi ch controls t he moni tori ng and operati on of the DPF sys t em and als o moni torsother vehi cle dat a to det ermine regenerat ion periods and s ervice i nt ervals .
The DPF s oft ware can be di vi ded int o t hree s eparate cont rol s oftware modules ; a DPF s upervis or module, a DPF fuelmanagement modul e and a DPF ai r management module.
Thes e three modul es are controll ed by a fourth s oftware module known as the DPF co-ordinator module. The co-ordi natormodule manages t he operati on of the ot her modul es when an acti ve regenerati on is reques t ed. The DPF s upervis or moduleis a s ub-s ys t em of t he DPF co-ordi nat or module.
DPF Fuel Management Module
The DPF fuel management modul e cont rol s t he foll owing funct ions :
Timi ng and quant it y of t he four s plit i njecti ons per s t roke (pi lot , main and two post inject ions ).Inject ion press ure and the trans i ti on bet ween t he three different cali brati on levels of i nject ion.
The above funct ions are dependant on the condit ion of t he cat alyt ic converter and t he DPF.
The cont rol led i nject ion det ermi nes the required injecti on level in addit ion to measuring t he act ivi ty of t he cat alyt icconvert er and the DPF. The fuel management cal culat es t he quant it y and ti mi ng for t he four s plit i njecti ons , for each oft he three cal ibrat ion l evel s for i njecti on pres sure, and al s o manages the t rans it ion bet ween the l evel s.
The t wo post i njecti ons are requi red t o s eparate the funct ionali ty of i ncreas i ng in-cyli nder gas t emperat ures and t heproduct ion of hydrocarbons. The firs t pos t i nject ion is us ed t o generate the hi gher in-cyl inder gas temperat ure whi les imul taneous l y ret aining t he s ame engine t orque out put produced duri ng normal (non-regenerati on) engine operat ion. Thes econd pos t inject ion i s used to generat e hydrocarbons by al lowi ng unburnt fuel into the cat al yti c convert er wit houtproduci ng increas ed engine t orque.