Volkswagen Passat W8 Spezifikationen

Engine Management of the W8 Engine in the PassatMotronic ME 7.1.1Self-Study Programme 249Service.

10SubsystemsKnock controlEach bank of the W8 engine is equipped with two knock sensors mounted on the crankcase. To prevent the connectors in the wiri

11Variable valve timingInput signalsThe task of variable valve timing is to set the best valve timing for the operating modes idle, maximum power and

12SubsystemsStereo lambda regulationInput signalsDuring stereo lambda regulation, separate regu-lation loops, each including a catalyst, a pre-catalys

13The fuel tank ventilation systemThe fuel tank ventilation system prevents fuel vapour which develops in the tank from escaping to the atmosphere. Th

14SubsystemsThe cruise control system (CCS)With the aid of the cruise control system, a vehicle speed above 30 km/h can be specified. This speed will

15Electronic power controlThe driver’s input, i.e. the signals from the accele-rator pedal, are transmitted to the engine control unit, which uses the

16The secondary air systemSubsystemsInput signalsThe secondary air system reduces the exhaust emissions following a cold start. During the warm-up pha

17Engine mounting regulationInput signals● Signal from engine speed sender● Vehicle speedThe hydraulically damped engine mountings with electro-pneuma

18Coolant temperature regulationSubsystemsInput signalsCoolant temperature regulation enables the coolant temperature to be adapted to the current ope

19The regulated vacuum pump system(only for vehicles with automatic gearboxes)Input signals● Signal from pressure sensor for brake servoVehicles with

2The Motronic engine management system of the W8 engine enables high power output with mini-mal fuel consumption through adaptation to all operating m

20SensorsAir mass meter G70 with intake air temperature sender G42Air mass meter G70 with backflow recognition and intake air temperature sender G42 a

21The actual values of the coolant temperature are measured at two different points. Coolant tempe-rature sender G62 is located on the engine block (a

22SensorsEach is located in the exhaust manifold of its spe-cific bank downstream to the catalyst (after-cata-lyst probe).The broad-band lambda probes

23Brake servo pressure sensor G294 (only for vehicles with automatic gearbox)For further information, please refer to SSP 257 „Electronic Vacuum Pump

24SensorsAll Hall senders are located in the timing chain cover of the engine. They have the task of infor-ming the engine control unit of the positio

25The electronic regulation of ignition timing is based on cylinder-specific knock control. The W8 engine has two knock sensors on each bank, located

26SensorsThe accelerator pedal module is located on the pedal cluster and consists of● the accelerator pedal● the accelerator pedal position sender G7

27Use of signalThe clutch pedal switch is located on the pedal cluster.Clutch pedal switch F36The signal indicates to the engine control unit when the

28Sensors / ActuatorsThrottle valve control part J338Throttle bodyThrottle valve driveThrottle valveThrottle valve drive angle senders 1+2 The throttl

29Fuel pump G6The fuel pump is installed directly in the fuel tank. With the aid of the pressure regulator, it creates a pressure of 4 bar in the fuel

3Table of ContentsIntroduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4System overview . . . . . . . . . . . . . . . .

30ActuatorsInjectors N30, N31, N32, N33, N83, N84, N85, N86The injectors are actuated by the engine control unit according to the firing order.They ar

31The solenoid valves are integrated in the control housing of the camshaft adjuster. They direct the oil pressure to the camshaft adjusters according

32ActuatorsActivated charcoal filter system solenoid valve 1 N80Opening the solenoid valve empties the activa-ted charcoal filter and directs the coll

33Secondary air pump V101The secondary air pump transports fresh air for the secondary air system.If the current supply is interrupted, no air is tran

34ActuatorsThe water pump V36 is located on the left side (in direction of travel) of the engine compartment on the suspension strut mounting.Dependin

35Map-controlled engine cooling thermostat F265The thermostat is inserted in the upper part of the crankcase from above. The thermostat switches betwe

36ActuatorsFunction of engine mountingsThe engine oscillation on a bad road surface is damped by the flow of a liquid (glycol mixture) between chamber

37Engine mounting - driving modeEngine vibrationsConnectingchannelChamber 1Glycol mixtureChamber 2Vacuum connectionPositioning springNozzle bodiesS249

38Functional diagramFunctional diagramN31N30 N32N33N83N84N85 N86E45J271SSSSN 70N127N291 N292N323N324N325N326J220E45 - CCS switchE227 - CCS buttonJ220

39SSSF36F47N80 N112G70G83G294G61G66G198G199J220F - Brake light switchF36 - Clutch pedal switchF47 - CCS brake pedal switchG61 - Knock sensor 1G66 - Kn

4IntroductionThe Motronic ME 7.1.1S249_003The regulation of the W8 engine is performed by the Motronic ME 7.1.1. The management system of the W8 engin

40Colour coding/Key= Input signal= Output signal= Positive= Earth= CAN data busFunctional diagramS249_072Kl. 30J293 G39G130G131J220SG108G79J338G187G18

41S249_073V192 V101V36J569J299N144N205N318 N319N208G28G40G163G300G301F265J220G62J496Kl. 30SSSJ17SG6F265 - Map-controlled engine cooling thermostatG6 -

42ServiceSelf-diagnosisThe engine control unit enables a broad self-diagnosis of all subsystems and electrical components.These vehicle diagnosis syst

43The use of the vehicle diagnosis system VAS 5052 is explained inSSP 256 „VAS 5052“.VAS 5052S249_081With the vehicle diagnosis and service informatio

44ServiceG70G28G62G83G39G108G130G131G40, G163,G300, G301G61, G66,G198, G199J338G79,G185E45, E227F, F47F36JG294J285J293J220CANJ17, G6J338N30, N31,N32,

45Erase fault memoryFollowing „Erase fault memory“, one must check whether the camshafts have readapted them-selves. Without adaptation, camshaft adju

46Test Your Knowledge1. The engine control unit receives the signal for engine load froma. the lambda probes.b. the air mass meter.c. the accelerator

475. If a temperature sender failsa. the radiator fans go to emergency running mode.b. the engine stops.c. the control unit uses a substitute temperat

48Notes

49

5The engine control unit in the CAN data busThrough the CAN data bus, data are exchanged between the engine control unit and- the ABS control unit- th

50Notes

51Answers1.) b2.) d3.) c4.) b5.) a, c6.) b, c7.) a, b

249For internal use only © VOLKSWAGEN AG, WolfsburgAll rights reserved. Technical specifications subject to change without notice140.2810.68.20 Techni

6System overviewSensorsG70 Air mass meterG42 Intake air temperature senderG28 Engine speed senderG40 Hall sender 1, G163 Hall sender 2G300 Hall sender

7N30 Injector, cylinder 1, N31 Injector, cylinder 2N32 Injector, cylinder 3, N33 Injector, cylinder 4N83 Injector, cylinder 5, N84 Injector, cylinder

8SubsystemsThe fuel injection systemThe fuel pump, which is located in the fuel tank, pumps fuel through the fuel filter to the injectors. The injecto

9The ignition systemThe ignition timing is calculated according to a map stored in the engine control unit on the basis of the input signals.Input sig