The 2019 Audi Q8 IntroductioneSelf-Study Program 990793Audi of America, LLC Service Training Created in the U.S.A. Created 08/2018 Course Number 990793 ©2018 Audi of America, LLC All rights reserved. Information contained in this manual is based on the latest information available at the time of printing and is subject to the copyright and other intellectual property rights of Audi of America, LLC., its affiliated companies and its licensors. All rights are reserved to make changes at any time without notice. No part of this document may be reproduced, stored in a retrieval system, or transmitted in any form or by any means, electronic, mechanical, photocopying, recording or otherwise, nor may these materials be modified or reposted to other sites without the prior expressed written permission of the publisher. All requests for permission to copy and redistribute information should be referred to Audi of America, LLC. Always check Technical Bulletins and the latest electronic service repair literature for information that may supersede any information included in this booklet.Revision 1: September 19, 2018IntroductionOverview Dimensions12 4BodyOverview General body repairs 66 8EngineExhaust system Fuel tank Engine mounting1214 16 18Power transmissionOverview Selector mechanism 8-speed automatic transmission 0D5 Functions influencing transmission control Service2020 22 24 29 33Running gearOverview Axles Adaptive air suspension Steering system Brake system3434 35 36 39 40Electrics and electronics48 Volt MHEV electrical system Networking Topology Exterior lighting Tail lights4242 44 46 50 52Convenience electronicsOverview Rear view mirrors MOST bus Interior lighting Comfort System Central Control Module J393 Instrument clusters5454 55 56 57 58 59Climate controlOverview6060Safety and driver assist systemsOverview System overview6262 64Infotainment and Audi connect Introduction and overview of versions Sound systems Antennas Networking Online system update 6969 72 76 79 80Inspection and maintenance Knowledge assessment83 84iiiThe eSelf-Study Program (eSSP) teaches a basic understanding of the design and mode of operation of new models, new automotive components or new technologies. It is not a repair manual! Figures are given for explanatory purposes only and refer to the data valid at the time of preparation of the SSP. For further information about maintenance and repair work, always refer to the current technical literature.!NoteReferenceIntroductionThe Audi Q8 combines the best of two worlds – the refined elegance of a four-door luxury coupé and the practical versatility of a large SUV. The new top-of-the-line model of the Q family demonstrates luxury-class prestige in every detail. Its generously sized interior with variable luggage compartment, cutting-edge operating and running gear technology and its intelligent driver assist systems make the Audi Q8 an assured companion for business and leisure. A powerful yet efficient 3.0l V6 TFSI engine with mild hybrid technology provides the dynamic characteristics promised by the muscular design. With quattro permanent four-wheel drive and ground clearance of almost 10 inches (254 mm), the SUV coupe is equally at home away from paved roads. The coupe-like roof line gives it a significantly flatter look than its sister model the 2017 Q7. The Q8 is 2.6 inches (66 mm) shorter but approximately 1.1 inches (27 mm) wider. Strong contours and taut, athletic surfaces convey power, high quality and the special dynamics of the permanent four-wheel drive system. The Q8 offers its very own interpretation of the progressive design language which was introduced with the Audi A8, fusing the attributes of an elegant four-door luxury coupé with those of a handsome SUV, and including echoes of an Audi icon: the original quattro. With the striking single-frame grill in octagonal design, the Audi Q8 presents the new face of the Q family. Like the Audi Q7, the Audi Q8 is built at the Bratislava factory.672_0011OverviewClimate ControlAs Audi’s SUV crossover model, the Audi Q8 features expressive design with a new octagonal single-frame grill and characteristics reminiscent of the original Audi quattro. Like the 2019 Audi A8, , the Audi Q8 is based on Mild Hybrid Electric Vehicle (MHEV) technology. Below is a summary of the key features of the new Audi Q8.The new allergen air filter, installed as standard, ensures high air quality by reducing fine particulate matter, harmful gases and allergens inside the vehicle. Premium air quality is provided by the use of fragrance and ionization.Engines High performance and efficiency provided by a powerful TFSI engine with a 48V mild hybrid system.Driver assist systems Control Module for Adaptive Cruise Control J428 is installed in the single frame grill (top left). Laser Distance Regulation Control Module J1122 is also installed in the grill (top right).LED headlights Standard LED headlights with a color temperature similar to daylight. Optional Audi matrix LED headlights. (Awaiting approval for the U.S. and Canadian markets.)Displays and operation Up-to-date MMI touch response display and operating concept using two touch displays with haptic feedback. An Audi virtual cockpit with full HD resolution and a head-up display are available as optional extras.2672_002Running gear Adaptive shock absorbers as standard; adaptive air suspension and four-wheel steering as optional extras to optimize the vehicle’s dynamic characteristics. Body The lightweight body has a multi-material construction which ensures optimum functions and weight. The front and rear doors are frameless. A two-part panoramic sunroof is optionally available.Power transmission ›› 8-speed automatic transmission ›› quattro with self-locking center differential and final drive with open differential on rear axle ›› The driver’s commands are transmitted from the selector mechanism to the transmission via shift-by-wire technology.3Dimensions67.1 in (1705 mm) 42.7 in (1086 mm)66.1 in (1679 mm) 78.5 in (1995 mm)66.6 in (1691 mm) 86.2 in (2190 mm)672_00341.1 in (1044 mm)38.6 in (981 m m)29.6 in (751 mm)32.3 in (820 mm)38.5 in (978 mm)117.9 in (2995 mm) 196.3 in (4986 mm)39.9 in (1013 mm)672_004461.9 in 15722 (1572 mm)59.5 in 1512 (1512 mm)61.4 in 15592 (1559 mm)58.5 in 1486 (1486 mm)71.1 in 1086 (1806 mm)43.3 in 1100 (1100 mm)672_005Exterior dimensions and weights Length Width (not incl. mirrors) Width (incl. mirrors) Height Front track Rear track Wheelbase Unladen weight Max. gross weight 196.3 in (4986 mm) 78.5 in (1995 mm) 86.2 in (2190 mm) 67.1 in (1705 mm)1) 66.1 in (1679 mm) 66.6 in (1691 mm) 117.9 in (2995 mm) 4894 lb (2220 kg) 6173 lb (2890 kg)Interior dimensions and other specifications Front cabin width Front shoulder width Rear cabin width Rear shoulder width Load sill height Luggage compartment capacity Drag coefficient cW Capacity of fuel tank 61.9 in (1572 mm)2) 59.5 in (1512 mm)3) 61.4 in (1559 mm)2) 58.5 in (1486 mm)3) 32.3 in (820 mm) 21.3 cu ft (605 l)4) 61.9 cu ft (1755)5) 0.34 22.4 gal (85 l)1) 2) 3) 4) 5)Including roof antenna Elbow room width Shoulder room width Seat bench in rearmost position, load up to top edge of backrest With rear seat backrest folded down, load up to roof 5BodyOverviewThe body of Audi Q8 has a multi-material construction; in terms of layout and construction, it is largely similar to the 2017 Q7. The lightweight body contains many aluminum and hot-formed steel components; these steel components form the ultra high-strength backbone of the occupant cell and are used for 14.4% of the bodyshell. 15% of the body is made of high-pressure aluminum die castings; this includes the suspension turrets in the engine compartment and the connections between the side members and longitudinal members. Aluminum panels are used for the side frame and large areas of the floor, the rear wheel housings and the roof, as well as for the frameless doors, the front fenders and the rear lid; they make up 23.7% of the body.Joining techniquesThe following joining techniques are used during the manufacture of the multi-material body: ›› ›› ›› ›› ›› ›› Resistance spot welding for steel MAG welding Laser welding for aluminum Laser welding for steel MIG welding Friction element welding ›› ›› ›› ›› ›› ›› Semi-tubular punch riveting Pop riveting Flow-drill screws Clinching Seaming BondingKey: Sheet aluminum Die-cast aluminum Aluminum section Ultra-high-strength steel (hot-formed) Modern high-strength steel High-strength steel Soft steelReference For further information on the construction and structure of the body, please refer to eSelf-Study Program 990163, The 2017 Audi Q7 Introduction.6672_0067General body repairsAlthough it is very easy to see that the Audi Q8 is related to the 2017 Audi Q7 in technological terms, there are some major differences with regard to several service-related aspects, including general body repair work.Front bumperThe high quality standards of the body of the Audi Q8 are emphasized by extremely accurate and even gap widths. To ensure that the original gap widths are restored correctly, for example after any repair work performed on the body following an accident, there are numerous adjustments which can be made on the doors, hood, rear lid and bumpers. To adjust the gap widths at the front end of the Audi Q8, a new type of eccentric adjuster is featured in the headlight mounting. Once the two securing bolts have been loosened, the eccentric adjuster at the upper bolt can be turned – for example using the socket wrench from the rear window adjusting tool V.A.G 1739 – and the position of the headlight in relation to the hood and the bumper cover can be adjusted precisely.Securing boltsEccentric adjusterAdjuster in “zero” position672_008672_007!8Note When installing the headlight mounting, it is important to turn the eccentric adjuster to the “zero” position. To ensure this, the two markings must align. If this is done, there will be no hindrances when adjusting the bumper during the subsequent installation procedure.Frameless door windowsThe door windows on the Audi Q8 are frameless. A lateral adjuster is used to determine the incline of the window and therefore the pressure it exerts on the inner door seal. To perform adjustment, the adjuster with which the window regulator is secured in the door must be rotated. The height adjuster determines the depth of the window in the roof frame seal. To perform the adjustment, the adjuster screw on the window mounting in the window regulator must be rotated. Parallel adjustment of the rear door window to the front door window and to the side window is performed by moving the window in the clamping jaws of the window regulators. If any windows have not been adjusted correctly, it may result in wind noise, moisture or frozen door windows in winter.Adjuster (lateral adjustment)Securing bolt in clamping jaws672_009Adjuster screw (height adjustment)Roof frame sealRoof trim stripInner door sealDoor window672_0109Electric luggage compartment coverThe Audi Q8 can be equipped with an electric luggage compartment cover as an option. In technical terms, the system is the same as the one in the 2017 Q7. However, when the rear lid is opened, the luggage compartment cover moves forward almost horizontally in the luggage compartment side trim rather than being raised into the D-pillar trim. Luggage Compartment Cover Motor 1 V473 is located on the rear cross panel and is activated by Rear Lid Control Module J605. Using a reel and Bowden cables, this moves two actuators forwards or backwards, depending on the direction in which the electric motor is rotating. This opens or closes the luggage compartment cover. The number of motor revolutions is measured via Luggage Compartment Cover Sensor G758. To prevent any folds or creases from forming in the cover, it is important for both actuators to run synchronously. It must therefore be ensured that the Bowden cables are routed correctly. In particular, they must not be twisted when they are secured in the double clips. If the actuators are still not positioned in parallel, the Bowden cable can be corrected using the adjuster. When removing the actuators, it is essential to pull out the securing pins carefully to ensure that the entire drive unit cannot be damaged.Actuator Securing pin672_011Luggage Compartment Cover Motor 1 V473AdjusterDouble clip10Panoramic sunroofA two-part panoramic sunroof is optional; the front glass element can be opened electrically or can be tilted open at the rear. The rear panel is fixed; it is also made of glass and ensures a particularly light-filled and friendly ambiance inside the vehicle. The power-operated sunroof sun blind is light-proof; it offers 100% protection against the sun and therefore ensures that less heat builds up inside the vehicle. A total of four water drain hoses make sure that rainwater, for example, which has entered between the glass panel and the sunroof frame is drained off reliably. The hoses are attached directly to ball-shaped couplings on the sunroof frame. At the bottom, the front drain hoses lead to the plenum chamber and the rear ones to the rear wheel housings. When routing the hoses, it is important to make sure that you do not pull on them while connecting them. They must be connected in such a way that they are not stretched; equally, they must not hang down. To ensure correct installation, the front drain hoses have red markings, while the rear left hose has blue and the rear right hose green markings. The hoses must be secured in their retainers at these markings.Water drain grommet in plenum chamber672_012672_013Hose retainerColored marking672_01411EngineTorque/power curve of 3.0 ltr. TFSI engine EA839 Engine with code DCBDPower in kWEngine speed [rpm]Torque in Nm672_018Features Engine code Type Capacity in cm3 Stroke in mm Bore in mm Number of valves per cylinder Firing order Compression ratio Power output at rpm Torque at rpm Fuel Turbocharging Engine management Max. injection pressure Emission control Emission standard ConceptTechnical data DCBD V6 engine with 90° V angle 2995 89.0 84.5 4 1-4-3-6-2-5 11.2 : 1 340 hp (250 kW) 369 lb ft (500 Nm) at 1500 - 5300 Premium unleaded Turbocharger with wastegate Bosch MDG 1 3626 psi (250 bar) 2 close-coupled ceramic catalytic converters, Oxygen sensors before and after catalytic converter LEV 3 / Tier 3 Mild hybrid (48 V)1213Exhaust systemOverviewV6 TFSICatalytic converter with oxygen sensorFlexible pipeMufflerReference For further information on the exhaust system used, please refer to eSelf-Study Program 920173, The Audi 3.0l V6 TFSI EA839 Engine.14Rear mufflerCenter muffler672_02015Fuel tankThe Q8 is equipped with a 22.4 gal (85 l) fuel tank.Roll-over valveDrive line Reservoir with integrated fuel filter in delivery unit (long-life)Aggregate jet lineLiquid trap16How the tank is emptiedWhen the vehicle is being driven, fuel is initially pumped into the main chamber by the suction-jet pump in the side chamber of the fuel tank, and from there to the engine. The fuel is pumped from the main chamber to the side chamber through the drive line (small diameter, high speed). Using the Venturi effect, the fuel is conveyed from the side chamber to the main chamber via the aggregate jet line (large diameter, lower speed).Breather lineFiller neck672_02117Engine mountingThe 3.0l V6 TFSI engine has a three-point engine mounting (two mounts on the engine and one on the transmission). The familiar switchable electrohydraulic engine mountings are used on the V6 TFSI.V6 TFSIHydraulic transmission mounting672_022Right Electrohydraulic Engine Mount Solenoid Valve N145Left Electrohydraulic Engine Mount Solenoid Valve N144Hydraulic transmission mountingThe hydraulic transmission mounting is installed at the rear section of the transmission and counteracts the drive forces. The hydraulic action improves vibration damping for a smoother ride.BracketMounting672_02318Engine/Transmission Combination3.0 ltr. TFSI, EA839 seriesEngine codeDCBD8-speed automatic transmission 0D5 AL552-8QRear final drive 0G2 HL195.S3 M PR No..: GH11)Key to manufacturer code designation8-speed automatic transmissionAL552-8QTransmission type A = Automatic planetary transmissionOrientation L = LongitudinalNumber of gears Development number (indicating torque capacity, generation and position of front final drive)Front-wheel drive / four-wheel drive Q = Four-wheel drive with integrated transfer boxRear final driveHL195.S3 MInstallation location H = RearOrientation L = LongitudinalCrown wheel diameter in mmFinal drive type S = Standard (open differential)Version 3rd generationManufacturer code: M = Magna powertrainThe Audi Q8 is only available with an automatic transmission.1)Production number GH1: basic rear final drive (open differential) 19Power transmissionOverviewAt market launch, the Audi Q8 will be introduced with the 8-speed automatic transmission 0D5 and rear final drive 0G2. This drive version, which features a self-locking center differential in the 0D5 transmission and open differential on the rear axle, is already used on the 2017 Audi Q7. Please see eSelf-Study Program 990163, The 2017 Audi Q7 Introduction. It will be possible to order a sport differential as an optional extra at a later time for the Audi Q8, depending on the engine version. The 8-speed automatic transmission 0D5 is essentially the same as the one used in the 2019 Audi A8. The differences in the transmissions used in the various combinations are explained on page 24.Selector mechanism, see page 22The selector mechanism has been adapted from the 2019 Audi A8. It transmits the driver’s commands using full shiftby-wire technology. The function and design of the mechanism are described in eSelf-Study Program 990163, The 2017 Audi Q7 Introduction. The actuation of the parking lock is electrohydraulic. The layout of the manual release mechanism is similar to that of the 2017 Q7 but has been slightly modified.Coolant return line8-speed automatic transmission 0D5, page 24 Coolant supply line3-point engine mounting, see page 20Parking lock manual release The construction and operation of the manual release mechanism for the parking lock are similar to those of the manual release mechanism on the 2017 Q7. Caution! Before operating the manual release mechanism, the vehicle must be secured to prevent it from rolling away.Socket wrench for manual release (in vehicle tool kit)672_02820Rear final drive 0G2 At market launch, all Audi Q8 vehicles will be equipped with the rear final drive 0G2. The rear final drive 0G2 features an open differential and has the internal factory designation HL195.S3. The rear final drive 0G2 is installed using a 4-point mounting on the subframe. The radial bonded rubber mountings (not including the additional mounting) must be installed in a specified position according to the instructions in the Repair Manual.Rear final drive 0G2 ›› With measures to increase efficiency.Oil deflector for precise lubrication; enables oil level to be reduced, which in turn reduces churning lossesLow-viscosity gear oil reduces frictional losses Low-friction, two-row radial angular contact ball bearings672_026PropshaftRear final drive 0G2Bonded rubber bushing Additional mountingBonded rubber bushingBonded rubber bushing672_02721Selector mechanismThe selector mechanism of the 2019 Q8 is the same as the 2019 A8. It features full shift-by-wire (SBW) and park-bywire (PBW) functionality. The technology featured in this selector mechanism was introduced in the 2017 Audi Q7 in model year 2016 and can now be found in the following models: ›› ›› ›› ›› ›› 2017 R8. 2017 A4. 2018 Q5. 2017 Q7. 2019 A8.The design has been modified to suit the vehicle’s interior in each case.672_029Function diagram – selector mechanismE313 Selector Lever, has the following:G727 Selector Lever Position Sensor G868 Transverse Selector Lever Lock Sensor J587 Selector Lever Sensor System Control Module N110 Shift Lock Solenoid V577 Transverse Selector Lever Lock MotorThe complete unit must be replaced if one of these components is defective.E681 Selector Lever Release Button E816 Parking Lock Button K320 Parking Lock Indicator Lamp Y5 Selector Lever Transmission Range Display The Y adapter VAS 642 001 enables measurement between Selector Lever E313 and Selector Level Transmission Range Display Y5.672_030CAN High CAN Low Dash panel insert CANReference For important information on the selector mechanism concept and operation, please refer to eSSPs 990163, The 2017 Audi Q7 Introduction; 950173, The 0BZ 7-speed Dual Clutch S tronic Transmission in the 2017 R8 and 990493, The 2019 Audi A8 Introduction.22Exchange of information between selector mechanism and Transmission Control Module J217 Data is exchanged between the selector mechanism and the transmission via the gateway. Selector Lever Sensor System Control Module J587 communicates via the dash panel insert CAN; Transmission Control Module J217 communicates via the FlexRay with the gateway (J533).CapBoltSelector lever handle Selector Lever Release Button E681P button Parking Lock Button E816 with Parking Lock Indicator Lamp K320. K320 illuminates the P button to the dimmed setting and lights up brightly when the parking lock is active.Selector Lever Transmission Range Display Y5.Connector CConnector A Selector mechanism (Selector Lever E313)Connector B672_031238-speed automatic transmission 0D5The 8-speed automatic transmission 0D5 is an enhanced version of the 8-speed automatic transmission 0BK which was first used in the 2011 Audi A8. The 0D5 transmission made its debut on the 2017 Audi Q7. It has the internal Audi works designation AL552-8Q. The manufacturer, ZF-Getriebe GmbH, uses the designation 8HP65A. The 0D5 transmission is rated for peak input torque of 516 lb ft (700 Nm). The transmission setup can be adjusted via Audi drive select in the usual way; refer to page 29. The 0D5 transmission in the Audi Q8 has the following features: ›› There is no longer an oil pump in the transfer case; refer to “Lubrication of transfer box” page 26. ›› Dual angular contact ball bearings to minimize friction on pinion shaft in front final drive. ›› Low-viscosity gear oil in front final drive; refer to “Oil systems/lubrication” page 69on page 26. ›› Vehicles which have a start/stop are equipped with a hydraulic pulse accumulator (HPA). ›› On vehicles with MHEV technology, the transmission is equipped with an auxiliary hydraulic pump 1 for transmission oil V475.Function diagram, exchange of information and dataThe Transmission Control Module of the 0D5 transmission communicates with the vehicle via the FlexRay data bus.P/N signal, start enable signal to J623 FlexRay - J533 FlexRay - J533 FlexRay - J500 FlexRay - J500Ground connection N509672_032Key:Ground wire Positive wire Signal wire LIN bus Output InputG93 Transmission Fluid Temperature Sensor G182 Transmission Input Speed Sensor G195 Transmission Output Speed Sensor G510 Temperature Sensor in Control Module G747 Parking Lock Sensor J217 Automatic Transmission Control Module J500 Power Steering Control Module J533 Data Bus On Board Diagnostic Interface N88 Solenoid Valve 1 N215 Automatic Transmission Pressure Regulating Valve 1 N216 Automatic Transmission Pressure Regulating Valve 2 N217 Automatic Transmission Pressure Regulating Valve 3 N218 Automatic Transmission Pressure Regulating Valve 4 N233 Automatic Transmission Pressure Regulating Valve 5 N371 Automatic Transmission Pressure Regulating Valve 6 N443 Automatic Transmission Pressure Regulating Valve 7 N486 Parking Lock Solenoid N509 Transmission Fluid Cooling Valve ** V475 Transmission Fluid Auxiliary Hydraulic Pump 1 (only on vehicles with MHEV technology)24ATF supply unitOn all 0D5 transmissions, ATF is supplied primarily via the mechanically driven ATF pump. On vehicles with the start/stop function but without MHEV technology, the transmission is equipped with a hydraulic pulse accumulator (HPA). The HPA assists with the hydraulic supply for the transmission in start/stop mode. On vehicles with MHEV technology, Transmission Fluid Auxiliary Hydraulic Pump 1 V475 is installed in place of a hydraulic pulse accumulator. It assumes the task of the HPA and, additionally, performs the hydraulic supply for the transmission when the engine is switched off in coasting mode. Refer to page 30.OD5 transmission without MHEV technologyBreather opening Connector for N485Mechanically driven ATF pumpPump drive hub meshes with torque converter and rotates at engine speed672_033Hydraulic pulse accumulator (HPA), with Accumulator Solenoid N485, on vehicles with start/stop function.Accumulator Solenoid N485 Breather openingOD5 transmission with MHEV technologyTransmission Fluid Auxiliary Hydraulic Pump 1 V475 (on vehicles with MHEV technology).672_034Dual angular contact ball bearings The power supply connector to V475 is an identifying feature of transmissions with MHEV technology.Reference For detailed information about the technology of the 0D5 transmission, please refer to eSSP 950103, 2011 Audi A8 Power Transmission, eSSP 990163, The 2017 Audi Q7 Introduction, eSSP 990493, The 2019 Audi A8 Introduction.25Oil systems / lubricationThe 0D5 transmission of the Q8 MHEV technology requires two types of lubricating oil.Side shaft housing tubeATF system for the planetary transmission and the hydraulic control unit. Does not have a fixed maintenance interval. Oil system for transfer case and front final drive. The oil is supplemented with STURACO1) and does not have a fixed maintenance interval.The filler, inspection and drain plugs for both oil systems are identical.672_037Oil reservoirNo oil weep hole can be seen in this locationLubrication of transfer caseThe 0D5 transmission installed in the Q8 does not have a mechanical oil pump for lubrication of the transfer case (as was the case on older 8-speed automatic transmissions). Lubrication of the transfer is provided by the gear wheels running in the oil in the oil pan. The oil reservoir shown in the illustration is filled with oil which sprays from the gear wheels; its function is to distribute the oil.Transmission breatherThere is no breather passage from the front final drive to the collecting chamber on this transmission version. The breather for the front final drive runs via the side shaft housing tube; ventilation takes place via the breather for the transfer case, which leads to the collecting chamber (similarly to the breather for the ATF system). From here, a breather pipe leads outwards through the torque converter bellhousing. ATF breather Breather opening, see figure 672_033 page 25 Collecting chamber O-ring Breather for transfer box and front final driveSealing collar672_038Breather pipe26Oil systems / lubricationThe 0D5 transmission of the Q8 without MHEV technology requires three types of lubricating oil.ATF system for the planetary transmission and the hydraulic control unit. Does not have a fixed maintenance interval. Oil system for transfer case and front final drive. The oil is supplemented with STURACO1) and does not have a fixed maintenance interval. Oil system for front final drive. The new low-viscosity gear oil does not have a fixed maintenance interval and must not be mixed with the previously used gear oil. To prevent them from being mixed up, the new gear oil has a red/violet color.Filler and inspection plug for front final drive STURACO is an oil additive which reduces excessive stresses in the center differential and thus helps to enhance ride comfort. Always use ETKA for the correct usage and part numbers for the various transmission lubricants.1)Front final drive ATF filler and inspection plug672_037Filler and inspection plug for transfer caseDrain plug for front final drive Drain plug for transfer case Oil escape hole for twin-lip oil seal on transfer case/front final driveATF drain plugTransmission breatherVentilation of the front final drive, the transfer box and the ATF system is performed via the collecting chamber. From here, a breather pipe leads outwards through the torque converter bellhousing;refer to figure 672_033 page 25 When heating or cooling the transmission, pressure equalization is performed via the breather. To allow pressure equalization to take place, the breather openings must be open and unobstructed.Collecting chamberBreather for transfer caseATF breatherBreather for front final driveOil escape hole for twin-lip oil seal on planetary gears/ transfer case672_03627ATF temperature regulationATF temperature regulation in the 2019 Q8 for the North American Region is referred to as a single-circuit system. As on the 2017 Audi Q7, the ATF heat exchanger is supplied with coolant by a circuit which is switched in parallel with the large engine coolant circuit. The coolant circuit is controlled by Transmission Fluid Cooling Valve N509.Engine warm-up phase (N509 closed) During the engine warm-up phase, valve N509 is supplied with current and is closed. The ATF heat exchanger is not supplied with coolant. The coolant therefore does not lose any heat to the ATF, which means that the engine is quicker to reach its operating temperature. The thermal management system of the ECM decides when valve N509 should be reopened. The criteria for opening valve N509 are outside temperature, engine temperature, ATF temperature, engine speed and the heat requested by the climate control system.Heating and cooling the ATF (N509 open) If the engine has reached its operating temperature and there is sufficient heat available for all requirements, valve N509 is opened. The ATF heat exchanger is then supplied with warm coolant from the large engine coolant circuit. The ATF is heated up and its viscosity is reduced, which in turn improves the efficiency of the transmission. Heating of the ATF will continue for as long as the temperature of the engine coolant is higher than that of the ATF. As soon as the temperature of the ATF exceeds that of the engine coolant, it starts to lose heat to the coolant and is cooled down.ATF return lineATF supply lineN50921ATF heat exchanger672_0392Transmission Fluid Cooling Valve N509ATF return line1ATF heat exchanger672_040ATF supply line28Functions influencing transmission controlAudi drive selectAudi drive select allows the driver to choose between different vehicle driving modes. The Audi drive select modes specified below can be selected via the Audi drive select button or via the MMI. Transmission setups are tailored to the customer's requirements in a way which varies from country to country. For this reason, only typical differences between the various modes can be described here. The proportion of time spent driving in each Audi drive select mode can be viewed using the VAS Scan Tool. These times do not have any effect in terms of recognizing the type of driver and therefore do not permit any conclusions to be drawn about the driver’s driving style.672_043offroad In offroad mode, the transmission control system assists driving in rough terrain by using adapted functions. Gear selection follows a fixed shift program without driver type recognition. Gears are shifted late, similarly to transmission position S. Transmission position S is not available, but manual shifting is possible in tiptronic mode (manual mode M). Automatic upshifting of the transmission is deactivated in tiptronic mode (M1-8)1). The engine revs up to the rpm limit without shifting up. This prevents unwanted continuous up-and-down shifting. The deactivation of automatic upshifting allows the engine to stop on a hill at maximum revs. Even if traction is lost briefly, the gear is held to ensure that the full drive torque is available when the wheels regain full traction. The deactivation of automatic upshifting allows the full braking effect of the engine to be utilized when driving downhill. To protect the engine against over-revving, the transmission shifts up before a defined engine speed is reached. If the ignition is switched off and then on again, vehicles with air suspension are restarted in the Audi drive select mode allroad and in transmission position D. Vehicles with steel suspension are restarted in auto mode and in transmission position D. allroad The allroad mode does not have any effect on the transmission setup. comfort The transmission control system operates in a similar way to auto mode.29auto Shift point selection in transmission positions D and S is performed according to the characteristic curves of the driver type recognition. To do this, the driver’s driving style is evaluated. The manner in which the accelerator and brake pedals are operated and the lateral and longitudinal acceleration occurring within defined time frames are taken into account. Accordingly, an efficient driving style leads to early upshifts and late downshifts. A sporty driving style results in later upshifts and earlier downshifts. Transmission position D, (D1-8)1) : Shift point selection is performed with an emphasis on comfort, while taking driver type recognition into account. Transmission position S, (S1-8)1) : In transmission position S, the transmission control system is in the sport program. Shift points are selected with an emphasis on a sporty driving style, while taking driver type recognition into account; they are adapted to the engine power range. The shift times vary from normal (with barely perceptible shifts) to short (with perceptible shifts). If the vehicle is equipped with an efficiency assist system, no driver information is provided via the efficiency assist’s symbols in the sport program. dynamic If dynamic mode is selected, the transmission control module activates the sport program (transmission position S). In dynamic mode, it is possible to shift to D at any time. individual In individual mode, the driver can freely select the transmission setup irrespective of other vehicle systems. The menu item Drive system covers both the engine and the transmission. Via this menu item, the options efficient, balanced or sporty can be selected. These options correspond to the Audi drive select modes as follows: ›› Efficient corresponds to the Audi drive select mode efficiency. ›› Balanced corresponds to the Audi drive select mode auto. ›› Sporty corresponds to the Audi drive select mode dynamic.Coasting modeAll versions of the 0D5 transmission in the Audi Q8 support coasting mode. On vehicles with Mild Hybrid Electric Vehicle (MHEV) technology, the auxiliary hydraulic pump 1 for transmission oil V475 enables the engine to be switched off. Switching off the engine additionally saves fuel on vehicles with MHEV technology. However, certain circumstances may cause the engine not to be switched off, such as: ›› If a defined engine temperature has not been reached. ›› In the event of a corresponding request from the climate control If required by engine operation due to ESC regulation. ›› During an adaption routine in the engine management system. If the activation criteria described on the next page are fulfilled, the power flow between the engine and the transmission is interrupted. In coasting mode the vehicle uses the available kinetic energy and rolls along without any engine braking effect. Only transmission position D or E is displayed in the gear indicator; the gears are not shown. Depending on the speed at which the vehicle is traveling, the gears are preselected with the power flow interrupted. The transmission has five selector elements; the following ones serve as separator elements: ›› 8th gear: 3000 rpm transmission output speed: clutch D. ›› 8th gear: 3000 rpm transmission output speed: brake A. ›› 7th, 6th, 5th and 4th gears: clutch D. ›› 3rd and 2nd gears:clutch E. ›› 1st gear: clutch C. So that the gears can be preselected with the engine switched off, Transmission Fluid Auxiliary Hydraulic Pump 1 V475 is required. V475 ensures the necessary ATF supply while the engine is switched off. Refer to figure ATF supply unit page 25. There is a particular feature in 4th and 7th gears: If the vehicle is in one of these gears, the coasting function is activated if clutch D is opened. However, when preselecting gears the 4th and 7th gears are skipped, as critical speeds may occur in the transmission in these gears if clutch D is opened. If, for example, the coasting function is activated in 8th gear and the vehicle slows down gradually, the vehicle remains in 8th gear until it is possible to shift to 6th gear. A similar procedure is followed for 4th gear; the vehicle remains in 5th gear until it is possible to shift to 3rd gear.1)In the instrument cluster, the selected gear is shown next to the transmission positions D, E, S and M. In certain markets such as the USA and Canada, the selected gear is not shown in transmission positions D and E. The efficiency mode is not available on all vehicles. Availability depends on the engine/transmission combination and on which specific market the vehicles are configured for. This mode is not available in the North American Region.2)30!Note In coasting mode with the engine switched off, a delayed acceleration response may be noticed, as the engine may need to be started before acceleration and the corresponding separator element may need to be closed.Activation criteria: ›› The intelligent coasting mode must be activated via the MMI display2). ›› ESC must be active. ›› Transmission position D or E must be selected. ›› Vehicle is traveling at a speed of between34 mph and 100 mph (55 km/h and 160 km/h). ›› Overrun mode (accelerator pedal not applied). ›› Uphill gradient 3%1) and downhill gradient 4%1), the gradient of the road is detected by the longitudinal acceleration sensor of the brake electronics. ›› Activation by efficiency assist3) depending on the situation: If the vehicle is equipped with a navigation system4) and the optional adaptive cruise assist, the efficiency assist is able to activate the coasting function to suit the situation if the cruise control function is active. For this purpose, the efficiency assist uses the route data from the navigation system and data from the front camera.Deactivation criteria: ›› Uphill or downhill gradient  10%1) ›› Speed: ›› 105 mph (170 km/h) 1) ›› 5 mph (8 km/h)1) (if brake is not applied5)) ›› Accelerator pedal applied ›› Brake pedal applied: ›› 19 mph (30 km/h)1) as soon as brake light switch is activated ›› 19 mph (30 km/h)1) if a specified brake pressure threshold is exceeded ›› ESC is deactivated. ›› Transmission position S is selected. ›› Tiptronic mode is activated via the tiptronic gate or via the tiptronic switch in the steering wheel. ›› Deactivation by efficiency assist3) depending on the situation: If the vehicle is equipped with a navigation system4) and the optional adaptive cruise assist, the efficiency assist is able to deactivate the coasting function to suit the situation if the cruise control function is activated. This takes place depending on the vehicle's speed, for example, if the vehicle is approaching a built-up area or a roundabout. Coasting mode is also deactivated when the vehicle is approaching other road users. ›› On vehicles with MHEV technology: in the event that no assistance can be provided by Transmission Fluid Auxiliary Hydraulic Pump 1 V475 due to overload protection or a fault.1) 2)The stated values are approximate and are provided without obligation. They may vary depending on the vehicle version.On the MMI display, the efficiency assist with the “Intelligent coasting” and “Predictive messages” functions can be selected under Car = Driver assist = Efficiency assist. These functions can be activated or deactivated here. The intelligent coasting mode is also available on vehicles without a navigation system. The efficiency assist determines, based on the situation, whether the coasting function is activated or whether recuperation should take place via the starter-alternator in overrun mode. Predictive messages can only be provided with the assistance of the navigation system. These messages are displayed in the form of a symbol to instruct the driver to take his/her foot off the accelerator as soon as there is a situation ahead which requires a lower speed. The efficiency assist is a standard component of the engine management system. The navigation system is optional; it is not available in certain markets. If the vehicle is equipped with a navigation system, data relating to the route ahead are used. If the brake is applied and the brake pressure is below a specified threshold, the coasting mode remains active until the vehicle comes to a stop. 313) 4)5)Start/stop functionThe start/stop function is activated automatically every time the ignition is switched on. It helps to save fuel and reduce CO2 emissions. If the requirements for start/stop operation are fulfilled, the engine is switched off automatically if the brakes are applied and the vehicle’s speed drops below 14 mph (22 km/h)1). One of these requirements is that the selector lever is not in position R. If necessary, the engine is switched on again automatically. The requirements for this are a very short starting time and that the vehicle must be ready to drive off quickly. Transmission Fluid Auxiliary Hydraulic Pump 1 V475 (on vehicles with MHEV technology) ensure that the Audi Q8 is ready to drive off quickly. If assistance ceases to be provided by V475, the start/stop function is deactivated and is no longer available.Downhill speed controlThe downhill speed control helps the driver to maintain a constant speed when driving on downhill gradients. For this purpose, the transmission selects a gear which is suitable for the gradient so that the speed selected when the brakes are applied can be maintained using the engine braking effect. Depending on physical limitations, it may be necessary to additionally correct the vehicle's speed using the brake pedal. The downhill speed control function is deactivated again as soon as the gradient lessens or the accelerator pedal is applied. On appropriate gradients, the downhill speed control function is activated in transmission positions D and S if the brake pedal is applied or if the cruise control system is activated.Special features of the steering wheel tiptronic function›› After a long pull of the Tip- paddle lever, the transmission changes down into the lowest possible gear. ›› After a long pull of the Tip+ paddle lever, the transmission switches from temporary tiptronic mode to automatic mode. ›› If a system fault occurs in the selector mechanism, transmission positions P, R, N and D can be selected by simultaneously pulling both paddle levers, provided that the vehicle is stationary and the brake is applied. ›› The “tiptronic in D/S” function with which manual shifts can be performed at any time is available. ›› The “Activation of coasting via Tip+” has been deactivated in favor of a clearer function assignment for the steering wheel tiptronic function on the Audi Q8. It is still possible to deactivate coasting with the – paddle lever however.1)The stated values are approximate and are provided without obligation. They may vary depending on the vehicle version.Reference For further detailed information on the neutral idle control function in the 0D5 transmission, please refer to eSelf-Study Program 990163, The 2017 Audi Q7 Introduction.32ServiceTowing the vehicleIf a vehicle with an 0B5 transmission needs towing, the usual restrictions for automatic transmissions apply: ›› Activate the manual release mechanism for the parking lock ›› Maximum towing speed 31 mph (50 km/h) ›› Maximum towing distance 31 m (50 km) ›› Do not tow the vehicle with the front or rear axle raised off the ground Reason When the engine is not running, the oil pump is not driven and certain parts of the transmission are not lubricated. Failure to comply with the requirements for towing can therefore result in serious damage to the transmission.Transmission warning/indicator lampsIf the red transmission warning lamp appears in the instrument cluster, the driver is instructed not to drive any further.672_044672_045If the yellow transmission indicator lamp appears in the instrument cluster, it is generally possible to continue driving the vehicle. A corresponding driver message informs the driver of what to do.Diagnosis The electrical/electronic components as well as the control operations of the 0D5 are diagnosed using Address Word 0002 via the VAS Scan Tool.!Note The downhill speed control function cannot overcome the physical limitations of the vehicle and therefore cannot maintain a set speed in all conditions. The driver must always be ready to apply the brakes! Reference For descriptions and notes about towing and towing a trailer, refer to the Owner's Manual. For detailed and up-to-date information on the warning and indicator lamps, refer to the Owner's Manual.33Running gearOverviewThe running gear on the Audi Q8 is based on the MLBevo platform, which was also the basis for development of the Audi A4, A5, Q5, A6, A7, Q7 and A8. Due to the axle loads and vehicle dimensions, the Audi Q8 uses major MLBevo system components from the 2017 Audi Q7. The basic specification is steel spring running gear with electronic damping control. Adaptive air suspension and adaptive air suspension sport are optionally available. Four-wheel steering like the system used on the 2017 Audi Q7 is optional.672_046The running gear for all Audi Q8 vehicles comes with the quattro drive system.Running gear versionsFeaturesSuspension with air springs and damping control (1BL)This suspension system is standard equipment.Adaptive air suspension with air springs and damping control (1BK)This suspension will be available at a later date.34AxlesFront axleThe front axle is based on the proven design principle of the five-link suspension. The main system components are identical parts to those of the 2017 Q7. The track width is the same on both models.Rear axleThe Audi Q8 has a five-link rear axle. The main system components are identical parts to those on the 2017 Audi Q7. The track width is also identical for both models. The fourwheel steering system already used in the 2017 Audi Q7 is available as an option.672_047672_048Reference For detailed information on the system components and the running gear setup, please refer to eSelf-Study Program 960163, The 2017 Audi Q7 Running Gear and Suspension System.35Adaptive air suspensionIn terms of design, operation and servicing requirements, the adaptive air suspension system is identical to that used in the 2017 Q7. The general way in which the system works is identical for both models, although there are differences in the control characteristics.Drivetrain Control Module J775 incorporates the control software for the air suspension and damping systems as well as sensors for measuring vehicle dynamicsRight Front Damping Adjustment Valve N337Left Front Damping Adjustment Valve N336 Right Front Level Control System Sensor G289Left Front Level Control System Sensor G7836Right Rear Damping Adjustment Valve N339Level Control System Compressor Motor V66 and solenoid valve blockLeft Rear Damping Adjustment Valve N338672_049Left Rear Level Control System Sensor G76 Right Rear Level Control System Sensor G77AccumulatorReference For detailed information, please refer to eSelf-Study Program 960163, The 2017 Audi Q7 Running Gear and Suspension System.37Control characteristics of adaptive air suspension (1BK)Control parameter [mm]Driving modeRide heightliftHigh level 2allroad/ offroad comfort autoHigh level 1Normal leveldynamicLow level Motorway levelLowered rear endSpeed [km/h]672_050Key: Selection lock Hysteresis of selection lock XXs = waiting time before control operationThe illustration shows the control strategy for the air suspension systems. By selecting the preferred driving mode in Audi drive select, the driver determines the vehicle’s ride height and dynamic characteristics. At the same time, different ride heights are also automatically set within the selected driving mode, depending on the current vehicle speed. An example of this can be seen in the control strategy in “auto” mode: If the vehicle is currently set to a different ride height, the normal level is set by changing the volume of air in the air springs if the mode is selected when the vehicle is stationary or traveling at a speed below 44 mph (70 km/h). If the vehicle subsequently exceeds a speed of 43 mph (70 km/h), the ride height will immediately be lowered by 25 mm.If the speed then increases further to at least 100 mph (160 km/h) and remains there for 20 seconds, the ride height will be lowered again by a further 0.5 in (15 mm). If the speed is subsequently reduced again and the vehicle is driven at a speed between 80 mph and 22 mph (130 km/h and 35 km/h)for a duration of 30 seconds, the ride height is raised by 0.5 in (15 mm) to the ride height previously set. If the speed is reduced to a value between 22 mph and 6 mph (35 km/h and 10 km/h), the ride height is raised immediately by 0.5 in (15 mm). If the speed drops below 6 mph (10 km/h), the vehicle is raised again to the normal level specified for “auto” mode. In addition to comfort- and dynamics-related advantages, the lowering of the ride height primarily aims to improve aerodynamics and therefore reduce fuel consumption.38Steering systemThe 2019 Audi Q8 uses the same electro-mechanical power steering system (EPS) as the 2017 Audi Q7. The steering ratio has been modified to suit the requirements specific to the Q8. On vehicles without four-wheel steering, a variable steering ratio is used (i = 14.6 in center position) by the progressive steering system. On vehicles with four-wheel steering, the ratio is: i = 13.3. An electrically adjustable steering column is standard equipment for the 2019 Q8. It has been adapted from the 2017 Q7. The horizontal adjustment range is approximately 2.7 in (68 mm); the vertical range is approximately 1.6 in (40 mm). An electronic steering column lock is only fitted in vehicles for markets with greater anti-theft protection requirements (for example, Sweden and Great Britain).672_051Reference For detailed information on components carried over from other models, refer to eSelf-Study Program 960163, The 2017 Audi Q7 Running Gear and Suspension System.39Brake systemThe brake system on the Audi Q8 is based on the 18” brake system used on the 2017 Q7. As with the current A8, Q7, Q5 and A4 models, the brakes on the front and rear axles of the Audi Q8 have separate but non-diagonal brake circuits. The brake calipers are also available in red.Engine 3.0 ltr. TFSI Minimum wheel size Type of brakes Number of pistons Piston diameter (mm) Brake disc diameter Brake disc thicknessFront axle 18" AKE fixed caliper brakes 6 30-36-38 375 mm 36 mmRear axle 18" ZF TRW floating caliper brakes PC 44 HE 1 44 350 mm 28 mm672_052672_053AKE fixed caliper brake used on the front axleTRW floating caliper brake used on the rear axle40Brake servoA size 9/9 tandem brake servo is used on the Audi Q8 in left-hand and right-hand drive markets alike. The brake servo is the same as the 2017 Q7. On vehicles with 48 V electrical system (mild hybrid), a pedal travel sensor is installed instead of the brake light switch. This sensor’s signal is used for regulating recuperation under braking.672_054Electromechanical parking brake (EPB) The EPB of the Q8 was also adapted from the 2017 Q7. The control software is located in ABS Control Module J104. The controls and service requirements relevant to the EPB are identical on both models.672_055ESC ESP 9 is featured on the Audi Q8. The brake pressure is generated by hydraulic pumps with six pistons. On vehicles equipped with the adaptive cruise assist system, two additional sensors measure the brake pressure in both brake circuits. As a general rule, data is transmitted via FlexRay. On vehicles equipped with channels A and B, communication takes place via both channels.672_056Reference For detailed information about the brake system of the Q8, please refer to eSelf-Study Programs 960163, The 2017 Audi Q7 Running Gear and 960293, The 2019 Audi A8 Running Gear and Suspension Systems.41Electrics and electronics48 Volt MHEV electrical systemThe electrical system of the Q8 is similar to the system of the 2019 A8 although the installation locations of the relays, fuse carriers and control modules are more comparable to those of the 2017 Q7. The Audi Q8 is a 48 Volt mild hybrid electric vehicle (48V MHEV). All Audi MHEVs are equipped with both a traditional battery and a lithium ion battery and starter-alternator. Fully electric driving is not possible with the Audi Q8 MHEV. The installation locations of the batteries, the voltage converter, the 12 Volt pinion starter and the 48 Volt starter-alternator are, along with their functions and layout, identical to the components in the 2019 A8.Wiring junction TV66 Main battery wire, 12 VBattery, 12 V AWiring junctions TV2 and TV3 with jump-start terminalRelay and fuse carrier SR1 in plenum chamber48 Volt belt starteralternator C2912 Volt pinion starter B Wiring junction TV142Relay and fuse carrier SR2 at foot rest (left-side)Wiring junction TV67 Positive wire, 48 VBattery, 48 V A6672_057Relay and fuse carrier SR4 on control module rack in luggage compartmentVoltage converter, 48/12 V A7Fuse holder SF on left of instrument panelReference For descriptions of the mild hybrid functions, refer to eSelf-Study Program 970293, The 2019 Audi A8 Electrics and Electronics.43NetworkingInstallation locations of control modulesSome of the control modules shown in this overview are optional and/or country-specific equipment. For reasons of clarity, not all control modules installed in the vehicle can be shown here.J1089J387A27J794J1122J844 J242 J500J775J234J1121J428 J898 J285J764 J527A31J104J623 J519J1088J386A6 A7 A27 A31 E265 J104 J136 J234 J245 J285 J345 Battery, 48 V Voltage converter (48 V/12 V) Right LED Headlamp Power Output Module 1 Left LED Headlamp Power Output Module 1 Rear A/C Display Control Head ABS Control Module Memory Seat/Steering Column Adjustment Control Module Airbag Control Module Sunroof Control Module Instrument Cluster Control Module Towing Recognition Control ModuleJ386 J387 J393 J428 J500 J502 J519 J521 J525 J527 J533 Drive Door Control Module Front Passenger Door Control Module Comfort System Central Control Module Adaptive Cruise Control Module Power Steering Control Module Tire Pressure Monitoring Control Module Vehicle Electrical System Control Module Front Passenger Memory Seat Control Module Digital Sound System Control Module Steering Column Electronics Control Module Data Bus On Board Diagnostic InterfaceReference Refer to the current service literature for details of control module installation locations, as well as instructions for installation and removal.44J927J769J521 J949A6A7 J245 E265 J5254J772J533J1019J136J853 J502 J345 J393 J926 J605 J770672_058J605 J623 J764 J769 J770 J772 J775 J794 J844 J853 J898 J926 Rear Lid Control Module Engine Control Module Electronic Steering Column Lock Control Module Lane Change Assistance Control Module Lane Change Assistance Control Module 2 Rearview Camera System Control Module Drivetrain Control Module Information Electronics Control Module 1 Automatic High Beam Assist Control Module Night Vision System Control Module Windshield Projection Head Up Display Control Module Driver Side Rear Door Control ModuleJ927 J949 J1019 J1088 J1089 J1121 J1122 R242 Passenger Side Rear Door Control Module Control Module for Emergency Call Module and Communication Unit Rear Axle Steering Control Module Control Module for Left Front Object Detection Radar Sensor Control Module for Right Front Object Detection Radar Sensor Driver Assistance Systems Control Module Laser Distance Regulation Control Module Driver Assistance Systems Front Camera45TopologyJ926J386J345J927J387J605N209J136J764J453N475J245A6N210J521J367A7N477C*H12G578G65A31J391A27J938MX3Comfort System Central Control Module J393Control motors 1-7 E265MX4Heater controls 1-4J866 Vehicle Electrical System Control Module J519MX13Control motors 1-15 J126V388 V390MX13V389 V391J604E1G395Background lighting 1-15 Background lighting 16-30 Background lighting 31-45G397 G355 J400J897J1101J1100Key: Convenience CAN Hybrid CAN Extended CAN Infotainment CAN Sub-bus systems/private CAN MOST bus LVDS Dash panel insert CAN Diagnostics CAN FlexRay Modular infotainment matrix CAN (MIB) LIN bus USB wires Ethernet Convenience CAN 2 Connect CAN46In this diagram, the FlexRay topology does not mirror the actual configuration of the control modules.The order of the control modules in the MOST ring in this illustration is also not identical to the actual sequence.R7U41R293E67J1060J525J1146J685Information Electronics Control Module 1 J794 J285J898J949J587 J1121 Data Bus on Board Diagnostic Interface J533 Driver Assistance Systems Control Module J1121 J1088R242 J794 R243J1089J853J769R212EX22R244Ultrasonic sensors 1-12J770J772EX23R245J1122J502J530R246J428J104Y7J706J234J1019J844J528J854J855J500J1097J1098J527J623J775J1135C29J217V475672_05947Key: A6 A7 A27 A31 Battery, 48 V Voltage Converter (48 V/12 V) Output Module 1 for Right LED Headlight Output Module 1 for Left LED Headlight J866 J897 J898 J926 J927 J938 J949 J1019 J1060 J1088 J1089 J1097 J1098 J1100 J1101 J1122 J1135 J1146 MX3 MX4 MX13 N209 N210 N475 N477 R7 R212 R242 R243 R244 R245 R246 R293 U41 V388 V389 V390 V391 V475 Y7 Power Adjustable Steering Column Control Module Ionize Control Module Windshield Projection Head Up Display Control Module Driver Side Rear Door Control Module Passenger Side Rear Door Control Module Power Rear Lid Opening Control Module Control Module for Emergency Call Module and Communication Unit Rear Axle Steering Control Module Front Information Display Control Head 2 Control Module for Left Front Object Detection Radar Sensor Control Module for Right Front Object Detection Radar Sensor Left Rear Seat Belt Tensioner Control Module Right Rear Seat Belt Tensioner Control Module Windshield Washer Pump Control Module Fragrance Diffuser System Control Module Laser Distance Regulation Control Module Level Control System Compressor Electronics Mobile Device Charger 1 Left Tail Lamp Right Tail Lamp Center Tail Lamp Driver Lumbar Support Adjustment Valve Block Front Passenger Lumbar Support Adjustment Valve Block Valve Block 1 in Driver Seat Valve Block 1 in Front Passenger Seat DVD Player Night Vision System Camera Driver Assistance Systems Front Camera Front Peripheral Camera Left Peripheral Camera Right Peripheral Camera Rear Peripheral Camera USB Distributor USB Connection 1 Driver Seat Backrest Blower Fan Front Passenger Seat Backrest Blower Fan Driver Seat Cushion Blower Fan Front Passenger Seat Cushion Blower Fan Transmission Fluid Auxiliary Hydraulic Pump 1 Automatic Dimming Interior Rearview MirrorC Alternator C29 Starter-Alternator E1 Lightswitch E67 Driver Side Volume Regulator E265 Rear A/C Display Control Head EX22 Switch Module in Instrument Panel, Center EX23 Center Console Switch Module 1 G65 G355 G395 G397 G578 H12 J104 J126 J136 J217 J234 J245 J285 J345 J367 J386 J387 J391 J400 J428 J453 J500 J502 J521 J525 J527 J528 J530 J587 J605 J623 J685 J706 J764 J769 J770 J772 J775 J844 J853 J854 J855 High Pressure Sensor Humidity Sensor A/C Pressure/Temperature Sensor 1 Rain/Light Recognition Sensor Anti-Theft Alarm System Sensor Alarm Horn ABS Control Module Fresh Air Blower Control Module Memory Seat/Steering Column Adjustment Control Module Transmission Control Module Airbag Control Module Sunroof Control Module Instrument Cluster Control Module Towing Recognition Control Module Battery Monitoring Control Module Driver Door Control Module Front Passenger Door Control Module Rear Fresh Air Blower Control Module Wiper Motor Control Module Adaptive Cruise Control Module Multifunction Steering Wheel Control Module Power Steering Control Module Tire Pressure Monitoring Control Module Front Passenger Memory Seat Control Module Digital Sound System Control Module Steering Column Electronics Control Module Roof Electronics Control Module Garage Door Opener Control Module Selector Lever Sensor System Control Module Rear Lid Control Module Engine Control Module Front Information Display Control Head Passenger Occupant Detection System Control Module Electronic Steering Column Lock Control Module Lane Change Assistance Control Module Lane Change Assistance Control Module 2 Rearview Camera System Control Module Drivetrain Control Module Automatic High Beam Assist Control Module Night Vision System Control Module Left Front Seat Belt Tensioner Control Module Right Front Seat Belt Tensioner Control Module48Bus systems used on the Audi Q8The bus systems used in the Audi Q8 are adapted from the 2019 Audi A8. The only new feature is the connect CAN, which connects Control Module for Emergency Call Module and Communication Unit J949 to the gateway.Configuration Electrical bus system Data transfer rate 500 kbit/sBus systems Connect CANWire colorThe FlexRay topology of the Audi Q8 is similar to that of the 2019 Audi A8. The exceptions are differences in branch 3A and 8A.Active Steering Control Module J792 and Differential Lock Control Module J187 are not used on the Audi Q8.FlexRayJ527 94 Ω J53394 Ω J792 2,6 kΩ Branch 8A J187 2,6 kΩ J1121 2,6 kΩ J1019 94 Ω J775 2,6 kΩ672_061Branch 3A J533 94 ΩKey: J527 J533 J775 J1019 J1121 672_060Steering Column Electronics Control Module Data Bus On Board Diagnostic Interface Drivetrain Control Module Rear Axle Steering Control Module Driver Assistance Systems Control ModuleReference For further information on bus systems, please refer to Self-Study Program 970293, The 2019 Audi A8 Electrics and Electronics.49Exterior lightingHeadlights LED headlights (PR No.: 8IT + 8G1/8G0)Available as ECE1) and SAE2) version The illustration shows the left headlight in the ECE1) version.4 12 1233Lighting functions: ›› ›› ›› ›› Daytime running light (1). Marker light (1). Low beam (2). High beam (3). ›› All-weather light (4). ›› Turn signal (1). ›› Side marker light (SAE only2), not illustrated).672_062Special features of the lighting functions On the SAE2) version, the daytime running lights are switched off during the turn signal procedure. During the light phase of the turn signal, the LEDs light up in yellow; during the dark phase, the white LEDs of the marker light are active. Equipment The LED headlights can be combined with the high beam assist and a headlight washer system as options. Service The control module installed on the outside of the headlight housing can be replaced in the event of a fault. In the event of damage to the upper and inner headlight attachments, repair tabs can be attached to the headlight housing.Coming home/leaving home function When it is dark, the entry/exit lighting illuminates the area around the vehicle when the driver unlocks the vehicle and after the ignition has been switched off and the driver’s door has been opened. The entry/exit lighting only takes effect when it is dark and when the light switch is in the AUTO position. The function activates the low beam, the marker lights and the tail lights. Headlight range adjustment The LED headlights on the Audi Q8 are equipped with automatic dynamic headlight range adjustment.1) 2) ECE = for the European market SAE = for the North American market50HD matrix LED headlights (PR No.: 8IT + 8G5)Available as ECE1) and SAE2) version The illustration shows the left headlight in the ECE1) version.432 1 1215672_063Lighting functions: ›› ›› ›› ›› ›› ›› ›› ›› Daytime running light (1). Marker light (1). Low beam (2). High beam spot light (3). Matrix beam main beam (5). Dynamic turn signal (1). All-weather light (4). Low beam (4). ›› ›› ›› ›› ›› Intersection light (4). Highway light. Cornering light. Intersection light (in combination with navigation system). Side marker light (SAE only2), not illustrated).Special features of the lighting functions On the SAE2) version, the daytime running lights are switched off during the turn signal procedure. During the light phase of the turn signal, the LEDs light up in yellow; during the dark phase, the white LEDs of the marker light are active. Equipment A headlight washer system is standard on the Q8 with HD matrix LED headlighs.Coming home/leaving home function On Audi Q8 vehicles with HD matrix LED headlights, the entry/exit lighting involves the low beam being switched on as well as dynamic activation of the marker lights and the tail lights, with the marker light and tail light LEDs being activated at different m