Service TrainingCommercial VehiclesSelf-study programme 446The 2.5l TDI EURO V engines with SCR system in Crafter Design and functionAG. Volkswagen AG d agen oes ksw not l o gu yV b ara d e nte is r o eo th u ra a c s sility ab y li an pt cees, in part or in w l purpos hole ercia , is n m m ot p o c erm or e t a itte iv r du rp o nl f e ngrrectness of i t to the co nf o r m spec atio h re n in witthi sd o cu m enht rig py Co t.agen lksw Vo byAG.Prote cted by c o py rig ht . C op yiurposes, in part or in wh ole, cial p is n mer m ot p o c erm or e t a itte v i r d pengines calls for both the continuous improvement of combustion inside the actual engine and increasingly powerful exhaust gas treatment systems.un leAG. Volkswagen AG d agen oes ksw not l o gu yV b ara d e nte is r o e oengines in the Crafter are equipped The worldwide tightening of temission limits for The new 2.5l TDI h u ra a c s s passenger cars and commercial vehicles with diesel with the SCR (Selective Catalytic Reduction) system.Volkswagen Commercial Vehicles is thus making a further contribution to protecting the environment and combating climate change.rrectne s s o f i t to the co n form spec atio h re n wit i n thi sd o c um enIn this self-study programme, you can find out about an exhaust gas treatment system that reduces harmful nitrogen oxides (NOx ) in the exhaust gas.ility ab y li an pt cer fo ngThis self-study programme describes the Selective Catalytic Reduction SCR) exhaust gas treatment system for the Crafter. Further information about the SCR system can be found in self-study programme 424 "The Selective Catalytic Reduction exhaust gas treatment system".The self-study programme presents the design and function of new developments! The content is not updated.Current testing, adjustment and repair instructions can be found in the applicable service literature.2ht rig py Co t.agen lksw Vo byAG.Prote cted by c o py rig ht . C op yiS446_002Caution NoteAt a glanceIntroduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 The 2.5l TDI engines with SCR system (EURO V) . . . . . . . . . . . . . . . . . . . . . . . . 4 Technical specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 Exhaust gas treatment system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 System construction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 Engine mechanics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 Engine speed sensor G28 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 Turbocharger . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 Diesel particulate filter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 Diesel particulate filter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11AG. Volkswagen AG d agen oes ksw n l o SCR system. . . . . . . . . .d b . y.V. . . . . . . . . . . . . . . . . . . . .o.t g .u. .......... ar. a e is or Overview of SCRthsystem . . . . . . . . . . . . . . . . . . . . . . . . . . n.te.e .o . . . . . . . . r au AdBlue® reducing agent . . . . . . . . . . . . . . . . . . . . . . . . . . . . .ac. . . . . . . ssility ab y li an pt cees, in part or in w l purpos hole ercia , is n m ot compe rm itte d...... ...... ...... Tank system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Functional principle of SCR system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .un lerrectness of i t to the co nform spec a t i h re o n in wit thi s12 12 13 14 20AdBlue® indicator concept . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27 AdBlue® indicators in dash panel insert . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27 System overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30r te o iva r rp fo g nService . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32 Special tools and equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32 Topping up the reducing agent . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33do c um enht rig py Co t.Prote cted by c o py rig ht . C op yiTest your knowledge . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .agen lksw Vo byAG.343IntroductionThe 2.5l TDI engines with SCR system (EURO V)New emission limits as a result of the introduction of EU RO V demand new exhaust gas treatment systems to reduce harmful emissions. In the past, Volkswagen has played an important role in driving the development of new systems to create cleaner diesel engines and faces up to its responsibility to clean up the environment. Examples include the efficient and economical TDI technology, as well as higher performance injection and exhaust gas treatment systems. The 2.5l TDI engines that comply with EURO V, have therefore undergone modifications in the following major areas.● ●Adaptation of the engine mechanics and engine management to optimise internal combustion Optimisation of the exhaust gas treatment systemIn addition to the optimisation measures involving existing components, the exhaust gas treatment system has been . Volkswagen AG gen AG doe a w extended and optimised with the new for notSelective Catalytic Reduction. It is a technology olks SCR system. SCR stands s gu yV b ara and reduces them. d (NO ) from the exhaust gas components that selects the nitrogen oxides e nt x ises, in part or in w l purpos hole ercia , is n m m ot p o c erm or e t a itte iv r du rp o nl f e ngr tho u a ssee or acility ab y li an pt cerrectness of i t to the co nf o r m spec atio h re n in witTechnical featuresThe technical features only list those changes resulting from the modification of the engine outlined above. The engine torques have been raised and torque curves optimised. These adaptations have been implemented exclusively by modifying the software in the engine control unit. The increase in torque, combined with a new gearbox with a longer transmission, ensures a reduced engine speed. The engine runs more smoothly. This brings a significant improvement in both driving comfort and fuel consumption. The SCR system reduces nitrogen oxide emissions and thus supports compliance with the limits in the EURO V emissions standard. The following page provides a brief overview outlining the parts and assemblies affected by the modifications to the engine. The self-study programme then continues with more detailed explanations.agen lksw Vo byAG.ht rig py Co t.Prote cted by c o py rig ht . C op yithi sd o cu m enSelf-study programme 371 "The 2.5l TDI engines in the Crafter" contains further information about technical features.4Changes to the engine mechanics● ●Engine speed sensorTurbo-chargerEngine speed sensor Turbo-chargerAG. Volkswagen AG d agen oes ksw not l o gu yV b ara d e nte is r o eo th u rS446_083 ac a s sS446_084ility ab y li an pt cees, in part or in w l purpos hole ercia , is n m ot p om c r erm o e t a itte riv du p or nl f e g nrrectness of i t to the co nform spec at i h re o n wit in t hisNew developments on diesel particulate filter● ● ●Diesel particulate filterPre-catalytic converter Diesel particulate filter Mounting of diesel particulate filterS446_085do c um en● ● ● ●Reducing agent injection valve SCR tank system Mixer in exhaust pipe Reduction catalytic convertersagen lksw Vo byAG.New developments due to SCR systemInjection valveMixer in exhaust flowht rig py Co t.Prote cted by c o py rig ht . C op yiSCR tank systemS446_086S446_087Reduction catalytic convertersS446_089 S446_088 S446_0915IntroductionTechnical specificationsThe 2.5l 65kW TDI engineEngine codespe rm itte dType displacement Bore Strokeun leAG. Volkswagen AG d agen oes ksw not l Output and torque curve o gu yV b ara d e nte ris eo tho u ra a c CEBA s sility ab y li an pt ce5-cylinder in-line engine 2461 cm 3 81,0 mm 95,5 mm Torque (Nm) 2 18 : 1 65 kW at 3300 rpm 250 Nm at 1900 rpm up to 2300 rpm Bosch EDC 17 CP Diesel fuel min. 51 CZ Exhaust gas recycling with exhaust gas cooling, precatalytic converter, diesel particulate filter, reduction catalytic converterses, in part or in w l purpos hole ercia , is n m ot comrrectness of i t to the co nform spec a t i h re o n in wit thi sValves per cylinder Compression ratio Max. outputMax. torqueEngine management FuelExhaust gas treatmentr te o iva r rp fo g nEmission standardEURO VSpeed (rpm) S446_005The 2.5l 80kW TDI engineEngine codes Type displacement Bore Stroke Valves per cylinder Compression ratio Max. output Max. torque Engine management Fuel Exhaust gas treatment CEBB 5-cylinder in-line engine 2461 cm 3 81,0 mm Torque (Nm) 95,5 mm 2 18 : 1 80 kW at 3300 rpm 300 Nm at 1900 rpm up to 2300 rpm Bosch EDC 17 CP Diesel fuel min. 51 CZ Exhaust gas recycling with exhaust gas cooling, precatalytic converter, diesel particulate filter, reduction catalytic converters EURO VOutput and torque curveEmission standardSpeed (rpm) S446_0066Output (kW)Output (kW)do c um enht rig py Co t.agen lksw Vo byAG.Prote cted by c o py rig ht . C op yiThe 2.5l 100kW TDI engineEngine code Type displacement Bore Stroke Valves per cylinder Compression ratio Max. output Max. torque Engine management Fuel Exhaust gas treatment CECA 5-cylinder in-line engine 2461 cm 3 81,0 mm 95,5 mm Torque (Nm) 2 18 : 1 100 kW at 3500 rpm 330 Nm at 2000 rpm up to 2800 rpm Bosch EDC 17 CP Diesel fuel min. 51 CZ Exhaust gas recycling with exhaust gas cooling, precatalytic converter, diesel particulate filter, reduction catalytic converters EURO VOutput and torque curveEmission standardSpeed (rpm) S446_007AG. Volkswagen AG d agen oes ksw not l o gu yV b ara d e nte is r o eo th u ra a c curve s Output and torque sEngine code Type displacement Bore Stroke Valves per cylinder Compression ratio Max. output Max. torque Engine management Fuel Exhaust gas treatmentCECBes, in part or in w l purpos hole ercia , is n m ot com5-cylinder in-line enginepe rm itte dun leThe 2.5l 120kW TDI engine2461 cm 3 81,0 mm Torque (Nm)95,5 mm218 : 1120 kW at 3500 rpm360 Nm at 2000 rpm up to 2800 rpm Bosch EDC 17 CPr te o iva r rp fo g nDiesel fuel min. 51 CZ Exhaust gas recycling with exhaust gas cooling, precatalytic converter, diesel particulate filter, reduction catalytic converters EURO VAG.Emission standardSpeed (rpm)S446_008Output (kW)Output (kW)ility ab y li an pt cerrectness of i t to the co nform spec a t i h re o n in wit thi sdo c um enht rig py Co t.agen lksw Vo byProte cted by c o py rig ht . C op yi7Exhaust gas treatment systemSystem constructionThe schematic system overview shows the key assemblies of the modified 2.5l TDI engines, which make a vital contribution to achieving compliance with the requirements of the new EU RO V emissions legislation.AG. Volkswagen AG d agen oes ksw not l o gu yV b ara d e nte is r o eo th u ra a c s In addition to the changes to the engine mechanics and the diesel particulate spe rm itte dility ab y li an pt cefilter, the new SCR system for reduction of nitrogen oxides is particularly important.es, in part or in w l purpos hole ercia , is n m ot comun lerrectness of i t to the co nform spec a t i h re o n in wit thi sSCR technology has already been in use in automotive engineering for some time and Commercial Vehicles has used it in trucks and buses. The introduction of the SCR system in the Crafter sees this technology enter the light commercial vehicles area of Volkswagen Commercial Vehicles.2.5l TDI engineEngine control unit J623r te o iva r rp fo g ndo c um enTemperature sensor before particulate filter G506 Exhaust gas temperature sensor 3 G495Connections for pressure sensor 1 for exhaust gas G450Pre-catalytic converter Diesel particulate filter8agen lksw Vo byLambda probe G39AG.ht rig py Co t.Prote cted by c o py rig ht . C op yiSCR systemThe reduction catalytic converters convert the nitrogen oxides (NOx ) contained in the exhaust gas into nitrogen (N2 ) and water (H2 O). To achieve this a reducing agent is continuously injected into the flow of exhaust gas before the reduction catalytic converters. The reducing agent is stored in a separate additive tank. The system is controlled by the engine control unit J623 in conjunction with the NOx sensor control unit J583 and the sensors responsible for the system.Signal linees, in part or in w l purpos hole ercia , is n m ot compe rm itte dun leAG. Volkswagen AG d agen oes ksw not l o gu yV b ara d tank SCR e nte is r o eo h ut (Example - Crafter in double cabin, ra a c s loading platform and chassis versions) sSCR delivery module with sensors and heatingility ab y li an pt cerrectness of i t to the co nform spec a t i h re o n in wit thi sReducing agent lineSensor lineNO x sensor control unit J583r te o iva r rp fo g ndo c um enThe essential components will be explained at the end of this system overview.AG.Mixeragen lksw Vo byReduction catalytic converterht rig py Co t.Prote cted by c o py rig h t . Co py iReducing agent injection valve N474NO x sensor G295 MufflerS446_0139Engine mechanicsAG. Volkswagen AG d agen oes ksw not l o gu yV b ara d e nte is r o eo th crankshaft u ra a c s s A different engine speed sensor is used in the new 2.5lEngine speed sensor G28TDI engine than that used in the previous model.ility ab y li an pt cees, in part or in w l purpos hole ercia , is n m ot p om c r erm o e t a itte riv du p or nl f e g nEngine speed sensor G28Sensor wheelThe engine speed sensor is fixed to the crankshaft sealing flange. It is Hall sensor, which scans the teeth of a 60 + 2 sensor wheel, which is fixed onto the driver disc. A double tooth on the sensor wheel acts as a reference marker for the engine speed sensor.Driver discrrectness of i t to the co nform spec at i h re o n wit in t hisS446_010 Crankshaft sealing flangedo c um enDouble toothht rig py Co t.Prote cted by c o py rig ht . C op yiTurbochargerVacuum actuatorThe encoder for the boost pressure controller G581 is integrated into the vacuum actuator in the turbocharger. The encoder is a displacement sensor, which enables the engine control unit to determine the position of the turbocharger guide vanes.Lock platesHall sensor MagnetThe function of the encoder for the boost pressure controller is explained in detail in self-study programme 368 "The 2.0 l 125 kW TDI engine with 4-valve technology".DiaphragmRod for guide vane adjustment10AG.The turbocharger is equipped with lock plates, which reinforce the connection between the turbine housing and the bearing case,agen lksw Vo byEncoder for boost pressure controller G581S446_011VacuumS446_047Diesel particulate filterThe diesel particulate filterThe new diesel particulate filter has a modular design, which combines the pre-catalytic converter and the diesel particulate filter that follows it. This construction combined with the installation position close to the engine ensures effective temperature management. The reaction temperature of the precatalytic converter is used for additional heating of the diesel particulate filter.Diesel particulate filter with integrated pre-catalytic converterS446_019● ●shorter regeneration time longer regeneration intervalses, in part or in w l purpos hole ercia , is n m ot p om c r erm o e t a itte riv du p or nl f e g nAG. Volkswagen AG d agen oes ksw not l o gu yV b ara d e nte is r o eo th u ra a c s Regeneration control for the diesel particulate sfilter has been optimised by:The mounting of the diesel particulate filter has been changed. It is now no longer mounted directly on the engine, but on the engine assembly bracket. This mounting means that fewer oscillations/vibrations are transmitted to the exhaust system.ility ab y li an pt cerrectness of i t to the co nform spec at i h re o n wit in t hisLambda probe G39Pre-catalytic converterTemperature sensor before particulate filter G506ht rig py Co t.do c um enDiesel particulate filterAG.Exhaust gas temperature sensor 3 G495 Connections for pressure sensor 1 for exhaust gas G450 Mounting bracketRetainer for mounting on assembly bracketagen lksw Vo byProte cted by c o py rig ht . C op yiS446_01211SCR systemOverview of SCR systemThe SCR system comprises the following main areas:● ● ● ●Reducing agent Tank system Delivery system with heating Reducing agent injection and distribution in exhaust flow Reduction catalytic converters and measuring / control componentsA brief overview of these areas is provided on the following pages, in the order of the actual process, starting with the tank system.● ●es, in part or in w l purpos hole ercia , is n m m ot p o c erm or e t a itte iv r du rp o nl f e ngn AG. Volkswagen AG do es n wage s k l ot g o yV ua b ran ed s i tee r o h t or u ac a ss1 - Reducing agent 2 - Reducing agent tank 3 4 5 6 -11 - Reducing agent level sensor G697thi sd o cu m en7 - Reducing agent pump heater Z103 8 - Reducing agent tank heater Z102 9 - Reducing agent line heater Z10410 - Reducing agent level evaluation unit G69812agen lksw Vo byAG.14 15 16 17 18 19 20 -Reducing agent pump V437 Reducing agent reversing valve N473 Filter Reducing agent injection valve N474 Exhaust gas temperature sensor 3 G495 NO x sensor G295 NO x sensor control unit J583ht rig py Co t.Prote cted byc o p yri gh t . C op yiReducing agent delivery module Filler Engine control unit J623 Reducing agent heater control unit J89112 - Reducing agent temperature sensor G685 13 - Pressure sensor for reducing agent metering system G686ility ab y li an pt cerrectness of i t to the co nf o r m spec atio h re n in witS446_050AdBlue® reducing agentThe ammonia necessary to reduce the nitrogen oxides is not used in a pure form, but in the form of an aqueous urea solution. Ammonia in its pure form has an irritating effect on skin and mucus membranes and also has an unpleasant odour. The reducing agent used in the SCR system is a liquid that is referred to by the automotive industry by the standard brand name AdBlue®.lkswage Vo AdBlue® is a high purity, transparent 32.5% solution ofge urea water. It isGmanufactured synthetically. nA n AG.in dwa olks yV b ed ris ho t aues, in part or in w l purpos hole ercia , is n m ot comFreezing point of AdBlue®pe rm itte dun lessoes not gu ara nte eo ra cility ab y li an pt cerrectness of i t to the co nform spec a t i h re o n in wit thi sAdBlue® has a urea content of 32.5 %, because the reducing agent has the lowest freezing point at this mixing ratio.Temperature in °CUrea concentration in %S446_038r te o iva r rp fo g ndo c um enProperties of AdBlue®:● ●Instructions for handling AdBlue®:●●●●●●The reducing agent tank is only to be filled using containers and adapters approved by the manufacturer. The reducing agent can irritate skin, eyes and the respiratory system. If this liquid comes into contact with the skin, wash it off immediately with plenty of water. If necessary, seek medical advice.●brush (immediately if possible). AdBlue® has a high creep capability. Electrical components and connections must be protected against the ingress of AdBlue®.AG.AdBlue® freezes at temperatures below –11 °C. AdBlue® decomposes at high temperatures (approx. 70 °C - 80 °C). The consequence of this is that ammonia is formed, which can cause an unpleasant odour. Impurities caused by foreign substances and bacteria can make AdBlue® unusable. Leaked and crystallised urea creates white spots. These spots can be cleaned with water and aOnly AdBlue® complying with the approved manufacturer's standard from original vessels is to be used. Drained AdBlue® may not be reused, to prevent impurities.ht rig py Co t.agen lksw Vo byProte cted by c o py rig h t . Co py i13SCR systemThe tank systemDepending on the Crafter version - panel van/Kombi or loading platform/double cabin - the tank system differs in terms of the positioning of the tank, the shape and the filling connection.AdBlue® tank for panel van/ KombiThe AdBlue® tank for the closed Crafter panel van/ Kombi design is positioned below the body platform. It has a capacity of● ●Coolant compensation tankAdBlue® fillerStandard design b approx. 25.3l Cold country design b approx. 18.5lS446_014The filler is located on the right of the engine compartment close to the coolant compensation tank. The tank is emptied using a drain hose, which is clamped into the rear of the tank. To empty the tank, the hose is n AG. Volkswagen AG do es n wage detached from the clamp and bent downwards. To open the hose, the closure must be unlocked and ksdrainage l ot g o yV u b a d detached. ran seun leri tho u a sstee or acility ab y li an pt cees, in part or in w l purpos hole ercia , is n m ot comRear of tank with drainage hosepe rm itte drrectness of i t to the co nform spec a t i h re o n in wit thi sClosure Clamping Drainage hose Delivery module Bleed valveControl unit for reducing agent heating J891Reducing agent level evaluation unit G698Tank containerVentilation valver te o iva r rp fo g ndo c um en14ht rig py Co t.agen lksw Vo byAG.Prote cted by c o py rig ht . C op yiFiller S446_015es, in part or in w l purpos hole ercia , is n m ot comOn the open loading platform/double cabin Crafter design, the AdBlue® tank is located on the right, below the loading area. It has a capacity of● ●pe rm itte dAdBlue® tank for loading platform/ double cabinun len AG. Volkswagen AG do es n wage s k l ot g o yV ua b ran ed s i tee r o h t or u ac a ssThe control units are attached to the rear of the tank.ility ab y li an pt cerrectness of i t to the co nform spec a t i h re o n in wit thi sS446_016Standard design b approx. 25.3l Cold country design b approx. 18.5lThe filler is located directly on the tank.Bleed valve Filler Delivery moduler te o iva r rp fo g nTank containerht rig py Co t.do c um enSpecial key for opening the AdBlue® tank closureThe tank closure must be opened with a special key. The key is located on the right of the footwell in the on-board tool compartment.For all tank versions: Top up quantity = Fill tank, see also operating instructions.agen lksw Vo byAG.Prote cted byc o p yri gh t . C op yiS446_017S446_066 Key15SCR systemTank adapter for unlocking the AdBlue® filling nozzleIf an AdBlue® filling nozzle is to be used to fill up at an AdBlue® filling station, a tank adapter must be used. This tank adapter is located on the right of the footwell in the on-board tool compartment.S446_018urposes, in part or in wh ole, cial p is n mer m ot p o c erm or e t a itte v i r d pun leAG. Volkswagen AG d agen oes ksw not l o V gu y b ara d nte ise r o eo h t u ra a c s sTank adapterility ab y li an pt cerrectne s s o f i t to the co n form spec atio h re n wit i n thi sd o c um enHow it worksThe tank adapter is screwed onto the tank filler. When the filling nozzle is inserted, the magnetic ring unlocks a safety valve in the nozzle's filling tube.Filling tubeTank adapterr fo ngS446_06516agen lksw Vo byMagnetic ringFilling tubeht rig py Co t.AG.Prote cted byc o p yri gh t. C op yiReducing agent delivery moduleDelivery moduleThe reducing agent delivery module is screwed onto the top of the heating chamber The heating chamber is secured in the lower section of the tank with lugs and screwed onto the tank housing using a lock ring. The delivery module is used to deliver and provide the reducing agent for the injection valve. The reducing agent pump V437, the reducing agent reversing valve N473, the pressure sensor for the reducing agent metering system G686 and the reducing agent pump heater Z102 are integrated into the delivery module.Tank housingLock ringS446_063 Heating chambergen Reducing agentkpump swa V437urposes, in part or in wh ole, cial p is n mer m ot p o c erm or e t a itte v i r d pun leReducing agent reversing valve N473ssol yV db e ris tho auAG. Volkswagen AG d oes not gu ara Feed line connection for nte e reducing agent to injection valve or a cility ab y li an pt cerrectne s s o f i t to the co n form spec atio h re n wit i n thi sd o c um enPressure sensor for reducing agent metering system G686Electrical connection for reducing agent level sensor G697Lock ringElectrical connection for reducing agent tank heater Z102 Upper heating chamber sectionr fo ngS446_057agen lksw Vo byLower heating chamber sectionAG.ht rig py Co t.Prote cted by c o py rig h t . Co py i17SCR systemHeating chamberThe heating chamber has an important position in the SCR tank system. It ensures that a stable supply of reducing agent is guaranteed.Feed to reducing agent pump V437Return from reducing agent pump V437Electrical connection for reducing agent level sensor G697 and reducing agent temperature sensor G685Lock ringun leAG. Volkswagen AG d agen oes ksw not l o gu yV b ara d e nte is r o eo h ut ra a c s sSealility ab y li an pt ceHeating wires in suction lanceurposes, in part or in wh ole, cial p is n mer m ot p o c erm or e t a itte v i r d pSuction lancerrectne s s o f i t to the co n form spec atio h re n wit i n thi sd o c um enHeating for reducing agent tank Z102Heating chamberReducing agent flow directionSwash slotReducing agent tankr fo ngLugS446_058Filtersagen lksw Vo byThe reducing agent is drawn from the delivery module heating chamber through a filter and a suction lance by the reducing agent pump. The filter is designed to prevent damage to the SCR system due to dirt particles in the reducing agent. A heater in the heating chamber ensures that SCR operation is possible even at low outside temperatures. The reducing agent flowing back from the pump drips from the outside of the suction lance into the heating chamber The reducing agent passes through swash openings from the tank into the heating chamber At low temperatures, the swashing movement of the reducing agent out of the heating chamber thaws out the frozen reducing agent in the tank.18ht rig py Co t.AG.Prote cted by c o py rig h t . Co py iHeaters in the SCR systemHeater connectionTank heaterThe heater for the reducing agent tank is a heating element with a PTC resistor. PTC resistors have maximum conductivity when cold. They have a positive temperature coefficient (= PTC). This means that, as the temperature rises, the resistance increases, reducing the flow of current.S446_059The heating element is cast in plastic and is located directly in the reducing agent tank heating chamber. The heater is actuated by the engine control unit using the power output stage.Heater for reducing agent tank Z102Reducing agent pump heaterThe heater for the reducing agent pump is also a heating element with a PTC resistor. As before, as the temperature rises, the resistance increases, reducing the flow of current. The heating element is cast into the delivery module and is used to heat the reducing agent pump, the reversing valve and the feed line connection. The reducing agent pump heater is actuated by the engine control unit using the power output stage.es, in part or in w l purpos hole ercia , is n m ot p om c r erm o e t a itte riv du p or nl f e g nAG. Volkswagen AG d agen oes ksw not l o gu yV b ara d e nte is r o eo th u a Heating surfaces r ac s sHeating surfacesContacts for heater connectionility ab y li an pt ceS446_060rrectness of i t to the co nform spec at i h re o n wit in t hisdo c um ento the injection valveactuated by the engine control unit via the reducing agent heater control unit.S446_061 Outer protective casing Heating wires - Reducing agent lineagen lksw Vo byAG.The heater for the reducing agent line is a stainless steel resistance wire. The resistance wire has a spiral shape, wrapped around the feed line and is protected on the outside by a plastic tube. The reducing agent line heater isHeating wire plugFilmht rig py Co t.Prote cted by c o py rig ht . C op yiLine/plug heaterfrom the reducing agent pump19SCR systemFunctional principle of SCR systemThe reduction catalytic converters reach their operating temperature at around 200 °C. Information about the exhaust gas temperature before the reduction catalytic converters is sent to the engine control unit by the exhaust temperature sensor 3 G495. The AdBlue® agent is drawn from the reducing agent tank by the reducing agent pump and pumped at approx. 5 bar through the heated supply line to the reducing agent injection valve. The reducing agent injection valve is actuated by the engine control unit and injects a metered quantity of reducing agent into the exhaust tract. The injected reducing agent is carried along by the exhaust gas flow and evenly distributed in the exhaust gas by the mixer. On the way to the reduction catalytic converters, known as the hydrolysis section, the reducing agent is broken down into ammonia (NH 3) and carbon dioxide (CO 2). In the reduction catalytic converters, the ammonia (NH 3) reacts with the nitrogen oxides (NO x) to form nitrogen (N2 ) and water (H2 O). The efficiency of the SCR system is monitored by the NO x sensor G295.un leAG. Volkswagen AG d agen oes ksw not l o gu yV b ara d e nte is r o eo h ut ra a c s sility ab y li an pt ceExhaust gas temperature sensor 3 G495urposes, in part or in wh ole, cial p is n mer m ot p o c erm or e t a itte v i r d pReducing agent injection valve N474Hydrolysis sectionReducing agentrrectne s s o f i t to the co n form spec atio h re n wit i n thi sd o c um enExhaust gasExhaust gas componentsMixerr fo ngCarbon dioxideWaterReducing agent - AdBlue®Ammonia - N H320AG.OxygenNitrogenht rig py Co t.agen lksw Vo byProte cted by c o py rig h t . Co py iNitrogen oxideThe following requirements must be met for the engine control unit to inject the reducing agent:●●The reduction catalytic converters have reached their operating temperature of around 200 °C. There must be ensured that sufficient liquid reducing agent available for injection at cold outside temperatures.S446_046If the following conditions exist, the engine control unit interrupts injection of the reducing agent:●Insufficient exhaust gas mass flow rate, for example when idling. If the exhaust gas temperature falls too far below the operating temperature of the reduction catalytic converters.●es, in part or in w l purpos hole ercia , is n m m ot p o c erm or e t a itte iv r du rp o nl f e ngAG. Volkswagen AG d agen oes ksw not l o V gu y b ara d nte ise r Nitrogen oxide reduction o eo h t u ra a c s sility ab y li an pt ceNOx sensor G295rrectness of i t to the co nf o r m spec atio h re n in witS446_044Reduction catalytic converterthi sd o cu m enThe design of the reduction catalytic converters is based on the same construction as a pre-catalytic converter with honeycombed ceramic body. The coating of the reduction catalytic converter is made up of copper zeolite. This is used to accelerate the nitrogen oxide reduction process.agen lksw Vo byAG.Prote cted byht rig py Co t.c o p yri gh t. C op yi21SCR systemReducing agent injectionThe reducing agent is injected into the exhaust system through the reducing agent injection valve N474. The injection valve is screwed into an angled inlet into the exhaust pipe. Depending on the actuation, it sprays the reducing agent in metered quantities onto the mixer with an injection angle of 10°. It is actuated by a pulse width modulated signal from the engine control unit. DesignReducing agent injection valve N474S446_020Cooling fins Solenoid Electrical connection 3-hole injection nozzleReducing agent Reducing agent - AdBlue® Connection for reducing olkswagen AG en AG. V does wag agent line no olks Valve spring S446_021es, in part or in w l purpos hole ercia , is n m m ot p o c erm or e t a itte iv r du rp o nl f e ngyV db ise r tho au s st gu Valve needle ara nte eo ra cility ab y li an pt ceSpray jetsReducing agent injection valve N474rrectness of i t to the co nf o r m spec atio h re n in witExhaust gasS446_022How it worksThe reducing agent pressure generated by the reducing agent pump is present in the injection valve. When idle, the valve needle closes the outlet holes due to the force of the valve spring. To inject the reducing agent, the engine control unit actuates the solenoid. This results in a magnetic field, which raises the valve armature and the valve needle. The injection valve opens and reducing agent is injected. When actuation of the solenoid ends, the magnetic field collapses and the valve needle closes under the force of the valve spring.ht rig py Co t.thi sd o cu m en22agen lksw Vo byAG.Prote cted by c o py rig ht . C op yiDistribution of the reducing agentAfter injection, the reducing agent must be distributed as efficiently as possible in the exhaust gas flow. This is achieved using a mixer, which is installed into the exhaust pipe immediately after the injection valve. The mixer consists of several slightly twisted baffles between which the exhaust gas flows. Design They swirl the reducing agent, distributing it as evenly as possible in the exhaust gas flow. The installation position and geometry of the mixer are designed to ensure that the spray jet from the injection valve impacts on the baffles in such a way that optimum distribution of the spray droplets can occur.AG. Volkswagen AG d agen oes ksw not l o gu yV b ara d e nte is r o eo th u ra a c s sMixerS446_023MixerS446_024ility ab y li an pt ceurposes, in part or in wh ole, cial p is n mer m ot p o c erm or e t a itte v i r d pun lerrectne s s o f i t to the co n form spec atio h re n wit i n thi sd o c um enMixerS446_025How it worksThe spray droplets are reduced in size when they impact on the baffles. This allows the injected reducing agent to evaporate more quickly and transfer to the gas phase. It also prevents larger spray droplets from reaching theagen lksw Vo byr fo ngreduction catalytic converter.Because of the geometry and arrangement of the baffles, the exhaust gas flow is also given a swirling motion. This leads to better mixing and even distribution of the spray droplets in the exhaust gas flow.ht rig py Co t.AG.Prote cted by c o py rig ht . C op yi23SCR systemHydrolysisThe hydrolysis section is located between the reducing agent injection valve and the reduction catalytic converters. Here, the ammonia (NH3) required to reduce the nitrogen oxides is formed from the reducing agent (aqueous urea solution). This is achieved by a thermolysis and hydrolysis reaction of the injected reducing agent. When the reducing agent is injected into the hot exhaust gas flow, first the water evaporates.urposes, in part or in wh ole, cial p is n mer m ot p o c erm or e t a itte v i r d pagen AG Thermolysis breaks down the reducing agent This is followed by hydrolysis, in which the isocyanic AG. Volksw does agen ksw not l o acid reacts with the water contained in the exhaust (aqueous urea solution) into ammonia and isocyanic gu yV ara db e n s teegas. This results in a further molecule of ammonia and ri acid. ho or ut ac a carbon dioxide. ss CO(NH2)2 b NH 3 + HNCO HNCO + H 2O b NH 3 + CO 2ility ab y li an pt ceun leUrea b Ammonia+ Isocyanic acidIsocyanic acid + Water b Ammonia + Carbon dioxiderrectne s s o f i t to the co n form spec atio h re n wit i n thi sd o c um enThermolysis = Thermolysis is a chemical reaction in which a starting substance is broken down into several products by heating.Hydrolysis = Hydrolysis is the separation of a chemical compound by reaction with water.Reducing agent injection valve N474ht rig py Co t.Good mixing and even distribution of reducing agent and exhaust gas is crucial. Before it enters the reduction catalytic converters, the reducing agent must be completely evaporated. The more even the distribution, the greater the efficiency of the reduction catalytic converters.24agen lksw Vo byAG.Prote cted byc o p yri gh t. C op yir fo ngReduction catalytic converterS446_048ReductionReduction catalytic converters are used to reduce the nitrogen oxides. This means that the process extracts the oxygen molecules from the nitrogen oxides. In reduction catalytic converters, the nitrogen oxides (NO + NO 2) react with the ammonia (NH 3) to form nitrogen (N 2) and water (H 2O). The correct ratio of NO and NO 2 in the exhaust gas for the reduction process is formed in the pre-catalytic converter, which is upstream of the diesel particulate filter. NO + NO 2 + 2N H3 b 2N2 + 3H2 O Nitrogen monoxide + Nitrogen dioxide + Ammonia b Nitrogen + WaterAG. Volkswagen AG d agen oes ksw not l o gu yV b ara d e nte is r o eo h ut ra a c s sReduction catalytic converterS446_042Reduction catalytic converterbefore the reduction catalytic converters is sent to the engine control unit by the exhaust temperature sensor 3 G495.es, in part or in w l purpos hole ercia , is n m m ot p o c erm or e t a itte iv r du rp o nl f e ngThe reduction catalytic converters reach their operating temperature at around 200 °C. Information about the exhaust gas temperatureS446_026ility ab y li an pt cerrectness of i t to the co nf o r m spec atio h re n in witReduction catalytic converterthi sd o cu m enAfter the reduction process, the exhaust gas contains the following substances:Carbon dioxideWaterOxygenNitrogenagen lksw Vo byS446_027AG.ht rig py Co t.Prote cted by c o py rig h t . Co py i25SCR systemNitrogen oxide content in exhaust gasThe nitrogen oxide content in the exhaust gas is determined by the NOx sensor G295, which is screwed into the exhaust pipe directly after the reduction catalytic converters.S446_043 NOx sensor G295The nitrogen oxide content determined is evaluated by the NOx sensor control unit J583.NOx sensor control unit J583How it works To monitor the function of the SCR system as part of the Euro on-board diagnostics, the signal from the NOx sensor is used to determine the efficiency of the . Volkswagen AG gen AG This is done d oes reduction catalyticlk converters. by swa not o V gu y b ara comparing s the measured value with a nitrogen oxide ed nth model in the engine control unit. calculation auurposes, in part or in wh ole, cial p is n mer m ot p o c erm or e t a itte v i r d pi orNO x sensor G295If the efficiency falls below a certain level, the exhaust gas warning lamp K83 (MIL) and the AdBlue® warning indicator for system faults are activated in the dash panel insert display. A fault is entered in the fault memory. The signal currents for the NOx sensor are in the micro-ampere range. To ensure high measuring accuracy, the signals are not sent to the engine control unit J623 via a long line, but are evaluated over a short distance by the NOx sensor control unit. The NOx sensor control unit processes the signals and sends them to the engine control unit.un lesstee or acility ab y li an pt ceS446_028rrectne s s o f i t to the co n form spec atio h re n wit i n thi sd o c um enNO x sensor G295Reduction catalytic converterIf the sensor fails, the driver is notified by the AdBlue® warning lamp in the dash panel insert.AG.26ht rig py Co t.The NOx sensor and the NO x sensor control unit form a single unit and must be replaced together in case of faults.agen lksw Vo byProte cted by c o py rig h t . Co py iS446_049r fo ngFurther information can be found in selfstudy programme 424 "The Selective Catalytic Reduction exhaust gas treatment system".AdBlue® indicator conceptAdBlue® indicators in dash panel insertInformation about the function of the SCR system can be displayed using the AdBlue® warning lamp and the display in the dash panel insert.AdBlue® warning lampThe AdBlue® warning lamp lights up to give the driver early notice of the need to top up the reducing agent or to notify them of a system fault. The position of the AdBlue® warning lamp depends on the type of dash panel insert Lowline or Highline.Lowline instrument The AdBlue® warning lamp is positioned above the display.Highline instrument The AdBlue® warning lamp is positioned in the right circular instrument.S446_093Manually retrievable rangebelow. On the Highline instrument, it appears in the upper large display.es, in part or in w l purpos hole ercia , is n m m ot p o c erm or e t a itte iv r du rp o nl f e ngAG. Volkswagen AG d agen oes ksw not l o gu yV b ara d e nte s i r The current possible range can be manually retrieved using the display. o eo th u ra a Lowline and Highline equipment options are shown c Possible variations of the remaining range display forss theility ab y li an pt cerrectness of i t to the co nf o r m spec atio h re n in witLowlineHighlinethi sd o cu m enht rig py Co t.agen lksw Vo byAG.Prote cted by c o py rig ht . C op yi27AdBlue® indicator conceptAdBlue® indicator for a lack of reducing agentlkswagenlevel, AG do the driver is prompted to top up the If the quantity of reducing agent in the tank falls below aocertain en AG. V ag es n ksw l ot g o V AdBlue® using two warning levels. ua byed ris ho t au ssran tee or acurposes, in part or in wh ole, cial p is n mer m ot p o c erm or e t a itte v i r d pRemaining rangeun leWarning lampAcoustic warningDisplay in Highline dash panel insertInformation for the driverility ab y li an pt cerrectne s s o f i t to the co n form spec atio h re n wit i n thi sd o c um enAbove 2400 kmAdBlue® warning lampGongThis notification appears if the quantity of reducing agent is only sufficient for the remaining range specified in the text. The driver is prompted to top up the reducing agent. An acoustic warning signal (gong) sounds as an additional indicator.0 kmAdBlue® warning lampWarning buzzerThis notification appears if there is no more reducing agent in the tank. The driver is notified that the vehicle will only run with a limited driving function. He is prompted to top up the reducing agent. The warning lamp flashes and, as an additional indicator, 3 consecutive warning signals sound (warning buzzer).ht rig py Co t.AdBlue® indicator for a system faultIf there is a system fault in the SCR system the NOx sensor can detect a reduced efficiency of the reduction catalytic converters. The driver is notified of this in the dash panel insert as follows.Warning lampAcoustic warningDisplay in Highline dash panel insertInformation for the driverAdBlue® warning lampGongThis notification appears if the quantity of reducing agent is only sufficient for the remaining range specified in the text. The driver is prompted to top up the reducing agent. The warning lamp flashes and an acoustic warning signal (gong) sounds as an additional indicator.K83 The exhaust warning lamp K83 also lights up.28agen lksw Vo byAG.Prote cted by c o py rig ht . C op yir fo nges, in part or in w l purpos hole ercia , is n m ot p om c r erm o e t a itte riv du p or nl f e g nAG. Volkswagen AG d agen oes ksw not l o V gu y b ara d nte ise r o eo h t u ra a c s sility ab y li an pt cerrectness of i t to the co nform spec at i h re o n wit in t hisDisplay in Lowline dash panel insert (the display is represented by a scrolling text in English)If the minimum AdBlue® level in the tank is reached, the tank must be completely topped up. The restricted driving function can only be resolved by filling up the tank.do c um enFrom a remaining range of 2400 km onwards, the predicted remaining range can be indicated using the multi-function display in the dash panel insert.Display in Lowline dash panel insert (the display is represented by a scrolling text in English)The display content shown on pages 27 - 29 correspond to the dash panel insert with German system settings and are intended as examples. The text content for the dash panel insert display in the relevant national language can be found in the corresponding operating instructions.ht rig py Co t.agen lksw Vo byAG.Prote cted byc o p yri gh t. C op yi29System overviewSensorsEngine speed sensor G28Hall sensor G40 Gas pedal position sensor G79Diagnostic connectionAir mass meter G70Coolant temperature sensor G62 Boost pressure sensor G31 Intake air temperature sensor G62urposes, in part or in wh ole, cial p is n mer m ot p o c erm or e t a itte v i r d pFuel pressure sensor G247Potentiometer for exhaust gas recycling G212Lambda probe G39Reducing agent pump V437 Injection valve for reducing agent N474 Reversing valve for reducing agent N473Exhaust gas pressure sensor 1 G450Exhaust gas temperature sensor 1 G235 Temperature sensor before particulate filter G506 Exhaust gas temperature sensor 3 G495r fo ngProte cted by c o py rig ht . C op yiBrake light switch FClutch pedal switch F36Clutch pedal switch 2 F379Gearbox neutral position switch F365Master switch for stop/start system E101Oil level and temperature sensor G26630CAN data bus driveun leAG. Volkswagen AG d agen oes ksw not l o gu y V sensor G71 b Intake manifold pressure ara d e nte is r o eo th u ra a c s s Fuel temperature sensor G81ility ab y li an pt cerrectne s s o f i t to the co n form spec atio h re n wit i n thi sd o c um enht rig py Co t.agen lksw Vo byAG.ActuatorsFuel pump relay J17 Fuel pump for pre-delivery G6 Injection Injection Injection Injection Injection valve valve valve valve valve for for for for for cylinder 1 N30 cylinder 2 N31 cylinder 3 N32 cylinder 4 N33 cylinder 5 N83Fuel metering valve N290Fuel pressure regulator valve N276 Engine control unit J623 Solenoid valve for boost pressure limitation N75Motor for intake manifold flap V157EGR valve N18 Control unit in dash panel insert J285 Reversing valve for exhaust gas routing cooler N345es, in part or in w l purpos hole ercia , is n m ot p om c r erm o e t a itte riv du p or nl f e g nAG. Volkswagen AG d agen oes ksw not l o gu yV b ara Coolant circuit valve N214 d e nte is r o eo th u ra a c s sRelay for coolant delay J151 Coolant circulation pump V50ility ab y li an pt ceHeater for Lambda probe Z19Reducing agent level sensor G697 Reducing agent level evaluation unit G698Automatic preheating control unit J179 Glow plug 1 Q10 Glow plug 2 Q11 Glow plug 3 Q12 Glow plug 4 Q13 Glow plug 5 Q14rrectness of i t to the co nform spec at i h re o n wit in t hisReducing agent heater control unit J891Reducing agent temperature sensor G685 NOx sensor G295 Control unit for NOx sensor J583Reducing agent tank heater Z102Reducing agent pump heater Z103do c um enPressure sensor for reducing agent metering system G686Reducing agent line heater Z104agen lksw Vo byS446_036ht rig py Co t.AG.Prote cted by c o py rig ht . C op yi31ServiceSpecial tools and equipmentAG. Volkswagen AG d agen oes ksw not l o Designation by V Tool gu ara d e nte is r o eo h ut ra a c s s Retaining plateUsees, in part or in w l purpos hole ercia , is n m ot p om c r erm o e t a itte riv du p or nl f e g nV.A.G 1383A/1The retaining plate is used to securely hold the container VAS 6542/1 when filling using the filler VAS 6542.ility ab y li an pt ceS446_053rrectness of i t to the co nform spec at i h re o n wit in t hisVacuum box VAS 6557The vacuum box is used for extracting the AdBlue® from the reducing agent tank.do c um enSpanner T5001432AG.Filler for AdBlue® VAS 6542ht rig py Co t.agen lksw Vo byProte cted by c o py rig h t . Co py iS446_054 The VAS 6542 is used to fill the reducing agent tank with AdBlue®. The VAS 6542/1 container has a capacity of 10 litres.S446_055 The spanner is used to fit the lock ring on the reducing agent delivery module.S446_056Topping up the reducing agentTop-up canisterContent: 1.89 litres (equivalent to half a gallon)AG. Volkswagen AG d Filling concept: agen oes ksw not l o V gu y b ara To fill the reducing agent tank, the top-up canister d e nte is r o eo h must be manually screwed ut onto the tank filler. ra a c s s releases an opening in the Pressure on the canister adapter fitting and the AdBlue® can flow into the tank. The vapours from the tank are collected by the top-up canister during filling and thus do not escape to the atmosphere.es, in part or in w l purpos hole ercia , is n m m ot p o c erm or e t a itte iv r du rp o nl f e ngility ab y li an pt ceS446_039rrectness of i t to the co nf o r m spec atio h re n in witTop-up canisterThe reducing agent tank is fully filled in the factory. It can be topped up using the top-up canister either using the VAS 6542 filler or directly using the screwon fitting.thi sd o cu m enS446_040AdBlue® filling stationThe Crafter can also be fuelled at an AdBlue® filling station. There has been comprehensive AdBlue® coverage throughout Europe since 2005.ht rig py Co t.agen lksw Vo byAG.Prote cted by c o py rig h t . Co py iS446_04133Test your knowledgeWhich answer is correct?pe rm itte des, in part or in w l purpos hole ercia , is n m ot comun leAG. Volkswagen AG d agen oes ksw not l o gu yV b ara d e nte is r o eo h ut ra a c s sility ab y li an pt cerrectness of i t to the co nform spec a t i h re o n in wit thi sOne or more of the answers given can be correct.1.A key is required to open the AdBlue® tank on the EURO V Crafter with loading platform. Where is the required key located? a) On the right of the footwell in the on-board tool compartment. b) The key is a special tool.r te o iva r rp fo g ndo c um enc) In the glove compartment.a) The tank adapter unlocks the AdBlue® filler nozzle using a magnetic ring. b) The tank adapter is used to extend the filler. c) The tank adapter is required when using top-up canisters3.Where is the AdBlue® filler located on the Crafter EURO V panel van/Kombi? a) In the left B-pillar. b) In the engine compartment close to the coolant compensation tank. c) In the rear right side panel.34AG.2.What is the role of the tank adapter on the Crafter EURO V loading platform/double cabin model?ht rig py Co t.agen lksw Vo byProte cted by c o py rig h t . Co py ia) An empty AdBlue® tank has no effects. b) Restarting is blocked after turning off the engine. c) The engine torque is reduced by 25 %.es, in part or in w l purpos hole ercia , is n m ot p om c r erm o e t a itte riv du p or nl f e g n4.AG. Volkswagen AG d agen oes ksw not l o gu yV b ara d e nte is r o eo th u ra a c s s What are the effects of an empty AdBlue® tank?ility ab y li an pt cerrectness of i t to the co nform spec at i h re o n wit in t his5.What needs to be done when the AdBlue® tank is empty? a) To resolve the reduced performance, at least 10 litres of AdBlue® has to be added. b) To resolve the reduced performance, at least ½ gallon of AdBlue® has to be added. c) To resolve the reduced performance, the AdBlue® tank has to be completely filled.ht rig py Co t.Prote cted by c o py rig ht . C op yido c um en6.What is the construction of the diesel particulate filter in the Crafter EURO V? a) It is a catalytically coated diesel particulate filter. b) The diesel particulate filter and pre-catalytic converter are fitted as separate components. c) The diesel particulate filter and pre-catalytic converter are separate components in a single housing.Solutions: 1. a; 2. a; 3. b; 4. c; 5. c; 6. cagen lksw Vo byAG.35446urposes, in part or in wh ole, cial p is n mer m ot p o c erm or e t a itte v i r d pun leAG. Volkswagen AG d agen oes ksw not l o V gu y b ara d nte ise r o eo h t u ra a c s sility ab y li an pt cerrectne s s o f i t to the co n form spec atio h re n wit i n thi sd o c um enr fo ng© VOLKSWAGEN AG, Wolfsburg All rights reserved. Subject to technical modifications. 000.2812.26.20 Technically correct at 05.2009 Volkswagen AG After Sales Qualification Service Training VSQ-1 Brieffach 1995 D - 38436 Wolfsburg, Germany;Printed on paper made from chlorine-free bleached pulp.ht rig py Co t.agen lksw Vo byAG.Prote cted byc o p yri gh t. C op yi