Self Study Programme 611 For internal use onlyAudi A3 ’13 Vehicle Electronics and Driver Assistance SystemsAudi Service TrainingIntroductionA special feature of the Audi A3 ’13 is the wide range of optional driver assistance systems previously exclusive to larger models. The third generation of the Audi A3 therefore leaves nothing to be desired as far as driver assistance systems are concerned. The Audi parking system in the new generation of the A3 can now also be augmented with the reversing camera system and the Generation 2.0 park assist system. Park assist helps drivers to parallel and perpendicular park the vehicle by identifying suitable parking spots and displaying them in the instrument cluster. The system then takes over steering the car during the actual parking maneouvre, thus allowing drivers to park effortlessly in even the tightest of spaces. If required, the system also helps drivers to manoeuvre the vehicle out of parallel parking spaces. Audi active lane assist is also available with the Audi A3 for the first time. It helps to ensure that drivers do not leave their lane accidentally. In addition to alerting the driver by making the steering wheel vibrate, Audi active lane assist also makes steering adjustments by applying steering torque directed towards the centre of the lane. These inputs are steering recommendations which the driver can override with little effort if desired. Audi side assist complements the available range of driver assistance systems. It monitors the traffic in the left and right adjacent lanes and detects vehicles in the driver's "blind spot" as well as vehicles approaching from behind. If a hazard is detected, the driver is alerted by a warning light in the door mirror on the side of the vehicle where the hazard has been detected. If drivers activate a turn signal and so indicate to the system that they intend to move into an "occupied" lane, the warning light flashes brightly to alert them to the hazard. The Audi A3 has an impressive range of optional light assist systems. In addition to the "digital" Headlight Assist system, which switches between high and low beams automatically, the intelligent light system is also available as an optional extra. Depending on the current traffic situation, this system continuously adjusts the headlight range between high and low beam. A camera scans for oncoming traffic and vehicles ahead and determines from the camera images the approximate distance to these vehicles. This distance value is utilised to adjust the headlight range in such a way that the lane is illuminated as best possible without dazzling oncoming traffic or vehicles ahead. The camera-based traffic sign recognition system makes it debut in the Audi A3 ’13. An advanced version of the speed limit display, it detects both speed limits and overtaking bans and indicates these on the centre display in the instrument cluster. This is achieved using image processing software which scans for traffic signs in the images captured by the front camera. The system still uses the predictive route data of the navigation system, which also includes information on traffic signs.611_0012ContentsTopologyTopology of the Audi A3 ’13 ________________________________________________________________________________________________________________________________ 4Vehicle electronicsControl unit in dash panel insert J285 _____________________________________________________________________________________________________________________ 6 Door electronics ______________________________________________________________________________________________________________________________________________ 8 Onboard power supply control unit J519 _________________________________________________________________________________________________________________ 15 Electrical steering column lock control unit J764 _______________________________________________________________________________________________________ 19 Entry and start authorisation control unit J518 _________________________________________________________________________________________________________ 20 Advanced Key ________________________________________________________________________________________________________________________________________________ 21 Terminal management _____________________________________________________________________________________________________________________________________ 24 Interior light _ ________________________________________________________________________________________________________________________________________________ 28Driver assistance systemsReversing camera ___________________________________________________________________________________________________________________________________________ 34 Park assist _ __________________________________________________________________________________________________________________________________________________ 36 Audi side assist ______________________________________________________________________________________________________________________________________________ 38 Front camera for driver assistance systems R242 _______________________________________________________________________________________________________ 40 Audi active lane assist ______________________________________________________________________________________________________________________________________ 42 Camera-based traffic sign recognition ____________________________________________________________________________________________________________________ 43 Headlight Assist _____________________________________________________________________________________________________________________________________________ 45Test your knowledge _______________________________________________________________________________________________________ 50• The Self Study Programme teaches a basic knowledge of the design and functions 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.!NoteReference3Topology of the Audi A3 ’13Light switch E1 Headlight power module, left J667Sliding sunroof control unit J245Wiper motor control unit J400Headlight power module, right J668Anti-theft alarm sensor G578Rain and light detector sensor G397Humidity sensor G355Power output module for left LED headlightAlarm horn H12Onboard power supply control unit J519Power output module for right LED headlightControl unit in dash panel insert J285Audi side assist control unit 2 J770Steering column electronics control unit J527Diagnostic port Multifunction steering wheel control unit J453Door control unit, rear driver side J926Door control unit driver side J386Door control unit, rear passenger side J927Door control unit passenger side J387Data bus diagnostic interface J533Trailer detector control unit J345NOx sender control unit J583 Engine control unit J623Entry and start authorisation control unit J518NOx sender control unit 2 J881Electrical steering column lock control unit J764Seat occupancy recognition control unit J706Airbag control unit J234Vehicle tracking system interface control unit J843Front left seat belt tensioner control unit J854Special vehicle control unit J608Front right seat belt tensioner control unit J855Climatronic control unit 1) J255Twin clutch gearbox mechatronics J743Selector lever sensors control unit J587Fresh air blower control unit J126Refrigerant circuit pressure sender G805Air humidity sender in fresh air intake duct G657Air quality sensor G2384Cornering light and headlight range adjustment control unit J745Headlight range control unit J431Multimedia system operating unit E380MMI display J685 Audi side assist control unit J769 Headlight assist control unit J844 Digital sound package control unit J525Front camera for driver assistance systems R242ACC control unit J428Information electronics control unit 1 J794ABS control unit J104Battery monitor control unit J367Power steering control unit J500Alternator CTV tuner R78Four-wheel drive control unit J492Reversing camera system control unit J772Audi parking system control unit J791Auxiliary heater control unit J364Auxiliary heating radio controlled receiver R64ECD control unit (electronically controlled damping) J250611_002Key: Powertrain CAN bus Convenience CAN bus Extended CAN bus1)Infotainment CAN bus Diagnostics CAN bus Suspension CAN busLIN bus Sub-bus systems MOST busFor more details of heater / air conditioning configurations, refer to SSP 609 "Audi A3 ’13".5Vehicle electronicsControl unit in dash panel insert J285Instrument cluster with monochrome multifunction display The monochrome multifunction display has a resolution of 320 x 240 pixels. It can be ordered with or without the driver information system. The efficiency program is automatically available when the driver information is ordered and is very useful for fuel-efficient driving.611_003The well-known tab concept for selecting the current display in the driver information system has also been adopted in the Audi A3 ’13 .Instrument cluster with colour multifunction display The colour multifunction display also has a resolution of 320 x 240 pixels. It automatically includes the driver information system with efficiency program. The optional adaptive cruise control (ACC) system is only available in combination with this instrument cluster.611_004 6Electrical connections A protected "terminal 30" line and a "terminal 31" line are routed to the control unit in the instrument cluster J285. Two twisted CAN bus lines are used for communication with other in-car control units: a convenience CAN High line and a convenience CAN Low line. In addition, the control unit reads in three other electrical components: two fuel tank senders and the immobiliser coil D2. The fuel tank senders use three-wire technology. Fuel tank sender 2 is fitted in quattro models only. The immobiliser coil D2 is fitted in vehicles with and without the optional advanced key. In vehicles without an advanced key, the coil is located in the ignition starter switch and exchanges data with the inserted ignition key. In vehicles with an advanced key, the immobiliser coil is fitted in a similar position but the ignition starter switch is not included with this option. The coil is only required in emergencies if a fault occurs in the keyless starter system. The ignition key must then be held in a marked position in order to turn on the ignition or start the engine. The immobiliser coil D2 is located behind this marking.Terminal 30Convenience CAN HighConvenience CAN LowImmobiliser coil D2Control unit in dash panel insert J285Fuel tank sender 1Fuel tank sender 2611_005In addition to its principal task of displaying key vehicle information and variables, the control unit in the instrument cluster J285 serves as the immobiliser master.Immobiliser master function In the Audi A3 ’13, the control unit in the instrument cluster J285 acts as the master for the immobiliser. It is a fifth generation immobiliser system. In addition to the immobiliser master control unit, the immobiliser system also includes the following control units: • Engine control unit (standard equipment) • Gearbox control unit (fitted only in vehicles with automatic gearbox) • Electronic steering column lock control unit J764 (fitted in combination with optional advanced key only)7Door electronicsDoor control unit, driver side J386Installation location611_006Tasks and characteristics of the control unit • Convenience CAN user • LIN bus master for LIN bus to door electronics in rear door • Reading in the central power window button • Reading in the door contact switch, the central locking button and the electrical child lock button • Reading in the mirror adjustment switch and the antitheft alarm deactivation button • Reading in the microswitch in the driver door locking unit • Activating the window lifter motor and the mirror adjustment motors • Activating the locking and SAFE motor in the driver door locking unit • Activating the door mirror heater • Substitute master of the central locking system • Activating the indicator in the door mirror and the lights of the optional interior light package8Pin assignments of the driver side door control unit J386Power supply Terminal 30 B19 Terminal 31 B20 Ground line "Terminal 30" supply; protected by a 30A fuseOther supply voltages C3 C4 C14 D5 Bus lines CAN bus B14 B15 LIN bus B10 Inputs Switch B5 D24 D25 Button D20 D23 D27 D28 D29 D30 D31 D32 Signals B1 B6 B7 B8 B17 C13 C16 Key contact switch in lock cylinder, driver side F241 Driver door microswitch locked / safed Ground line of microswitch in driver door locking unit Input signal for door mirror dimming function Input signal for door mirror dimming function Voltage signal of the horizontal mirror adjustment potentiometer, driver side Voltage signal of the vertical mirror adjustment potentiometer, driver side Antitheft alarm button E217 Rear hatch remote release button E233 Child lock button E318 Interior locking button, driver side E150 Window lifter button, rear passenger side, in driver door E714 Window lifter button, rear driver side, in driver door E712 Window lifter button, passenger side, in driver door E715 Window lifter button, front driver side E710 Door contact switch, driver side F2 Mirror adjustment switch E43 Mirror adjustment changeover switch E48 LIN bus to door electronics in driver side rear door Convenience CAN Low line Convenience CAN High line Voltage supply line for mirror heater and indicator in door mirror Ground line of mirror adjustment potentiometer Voltage supply of mirror adjustment potentiometer Ground line of driver door button9Outputs Lights B3 C1 C11 D1 D3 D4 D16 Door loudspeaker trim panel light, driver side L223 Ambient light in door mirror Indicator in door mirror L131 Indicator lamp for SAFE function of central locking system K133 Inner door handle light, rear driver side L220 Driver door button locating light - terminal 58xs Front door warning light, driver side W30 and front left entry light W31Function LEDs in buttons D10 D11 D12 D13 Motors Function light in antitheft alarm button Function light in rear right electrical child lock Function light in rear left electrical child lock Function light in interior locking button, driver sideA3 A6 B11 B12 B13 C5 C7 C8 C9 C10 Window lifter motor, driver side V147 Window lifter motor, driver side V147 Ground of SAFE function and central locking motors in the driver door locking unit Central locking SAFE function motor in driver door V161 Central locking motor in driver door V56 Shared connection of both mirror adjustment motors V17 and V149 Horizontal mirror adjustment motor, driver side V17 Vertical mirror adjustment motor, driver side V149 Folding mirror motor, driver side V121 Folding mirror motor, driver side V121Other actuators C2 C6 C15 Output signal for door mirror dimming function Output signal for door mirror dimming function Heated door mirror, driver side Z410Control units with rear window lifter motor, driver side J1016 and passenger side J1017In the basic version of the Audi A3 five-door model, the following control units are fitted in both rear doors: • Control unit with window lifter control unit, rear driver side J1016 and • Control unit with window lifter control unit, rear passenger side J1017 They replace the rear door control units in the basic version. The rear door control units are only required if the optional electrical child lock or the interior light package is ordered. In markets where models are fitted with an additional central locking button in both rear doors, door control units are also required in order to read in this button.Installation location611_00711Tasks of control units J1016 and J1017 • Reading in the local window lifter switch in the corresponding rear door • Activating the window lifter motor • Self diagnostics of the control unit and connected components • Communicating with the front door control unit via LIN busConvenience CAN busOnboard power supply control unit J519Door control unit driver side J386Terminal 30Terminal 58xsLIN bus611_009Key: E711 F435 F505 J1016 V471 V537 V539 Window lifter button, rear driver side Central locking system locking unit, rear driver side Door contact switch, rear driver side Control unit with window lifter control unit, rear driver side Window lifter motor, rear driver side Central locking SAFE function motor, rear driver side Central locking motor in door, rear driver side12Central locking system locking unit in the rear doors If both control units with rear window lifter motor J1016 and J1017 are fitted, the rear driver side and passenger side central locking system locking units (F435 and F436) are read in by the onboard power supply control unit J519. The locking units comprise the central locking motor V539 and the SAFE function motor V537 as well as the following microswitches. • Microswitch for feedback on whether a vehicle door is currently locked / unlocked • Microswitch for feedback on whether a vehicle door is currently safed / unsafed • Door contact switch F505 If door control units are fitted in the rear doors due to optional equipment ordered, the locking units are connected to the corresponding door control units, J926 and J927.Door control unit, rear driver side J926 and rear passenger side J927A number of customer service designations will be updated with the launch of the Audi A3 ’13. This applies to customer service designations which include information on installation locations such as "rear left" and "rear right". They will be replaced by new descriptions such as "rear driver side" and "rear passenger side". This goes in particular for the rear door control units. They will be given the new customer service designations "door control unit, rear driver side J926" and "door control unit, rear passenger side J927", instead of the previous designations "door control unit, rear left J388" and "door control unit, rear right J389". The rear driver side and rear passenger side door control units will be fitted in the five-door versions of Audi A3 derivative models if at least one of the following options has been ordered: • Electrical child lock • Interior light package They will also be fitted in Chinese, US and Canadian spec models in which a central locking button is additionally fitted in the rear doors.Tasks of control units J926 and J927 • Communicating with the corresponding front door control unit via LIN bus • Self diagnostics and transfer of diagnostic information to the front door control unit • Reading in the door contact switch, the window lifter button and the central locking button • Activating the lights in the optional interior light package • Activating the window lifter motor, locking and SAFE motor, and the child lock motor13Pin assignments of the door control unit, rear driver side J926Power supply Terminal 30 B19 Terminal 31 B20 C13 Bus lines LIN bus B10 Inputs Switches and buttons B5 C9 C10 Signals B4 B6 B7 Outputs Lights C1 C2 C11 C12 Motors A3 A6 B9 B11 B12 B13 Window lifter motor, rear driver side V471 Window lifter motor, rear driver side V471 Child lock motor, rear driver side V535 Ground of SAFE function and central locking motors in the door locking unit, rear driver side Central locking SAFE function motor, rear driver side V537 Central locking motor, rear driver side V539 Inner door handle light, rear driver side L225 Rear door button locating light, driver side - terminal 58xs Function light in rear interior locking button, driver side Door warning light, rear driver side W90 and entry light, rear driver side W83 Child lock microswitch, rear driver side activated / deactivated Rear door microswitch, rear driver side locked / safed Ground line of microswitch in locking unit, rear driver side Door contact switch, rear driver side F505 Window lifter button, rear driver side E711 Interior locking button, rear driver side E717 LIN bus to door control unit, driver side J386 Ground line Ground line of the rear door button, driver side "Terminal 30" supply; protected by a 30A fuse14Onboard power supply control unit J519Installation location611_010Tasks and characteristics of onboard power supply control unit J519 • Communicating with other control units via the convenience CAN bus • LIN bus master for multiple LIN bus systems • Central locking system master • Activating the locking units in the rear doors (only in vehicles with "control units with window lifter motor J1016 and J1017") • Exterior light master; activation of front headlights and tail lights • Interior light master; generation of terminals 58xs, 58xt and 58xd (locating light) • Activating the windscreen washer fluid and headlight cleaning system pumps • Reading in various switches and buttons • Reading in the ambient temperature sensor and the seat heater temperature sensors • Activating the "terminal 15" relay, rear window heater relay and signal horn relay • Activating the driver and front passenger seat heaters as well as the heated spray jets15Onboard power supply control unit J519Power supply Terminal 30A1 A66 A73 C1 C12 C73 "Terminal 30" supply; protected by a 30A fuse "Terminal 30" supply; protected by a 40A fuse "Terminal 30" supply; protected by a 40A fuse "Terminal 30" supply; protected by a 40A fuse Switched "terminal 30" "Terminal 30" supply; protected by a 30A fuseGround lines A12 A63 C63 Bus lines CAN bus A16 A17 LIN bus A15 B30/C28 B31 Inputs Switch LIN bus line to antitheft alarm sensor G578 and sliding sunroof control unit J245 (LIN bus 3) LIN bus line to wiper motor control unit J400, light switch E1 and rain and light detector sensor G397 (LIN bus 1) LIN bus line to alarm horn H12 of antitheft alarm system (LIN bus 2) Convenience CAN High line Convenience CAN Low line Vehicle ground - "terminal 31" Vehicle ground - "terminal 31" Vehicle ground - "terminal 31"A29 A33 A35 A48 A50 A52 A53 B11 B13 B14 B16 B19 B28 C58 Redundancy line to light switch E1 Rear door microswitch, passenger side locked / safed Rear door microswitch, rear driver side locked / safed Door contact switch, rear passenger side F506 Door contact switch, rear driver side F505 Microswitch for fully closed position of door lock mechanism (rear hatch lock) Microswitch for partially closed position of door lock mechanism (rear hatch lock) Reversing light switch F4 (on models with manual gearbox only) Brake fluid level warning contact F34 Bonnet contact switch F266 and bonnet contact switch 2 F329 Low coolant level indicator sender G32 Ground line for various level sensors Windscreen washer fluid level sender G33 Brake light switch FButton A32 C34 C42 C60 Release button for rear hatch lock cylinder F248 (softtouch) Driving profile selection button E592 (Drive Select) Hazard warning lights button E229 Start-stop mode button E69316Sensors B12 B27 C40 C43 C56 Signals A44 A47 A51 A54 C14 Outputs Relays A13 B24 C24 Activation of terminal 15 power supply relay J329 Activation of signal horn relay J413 Activation of heated rear window relay J9 "Terminal 15" request 1; supplied by the electrical steering column lock control unit J764 if the vehicle is equipped with the optional advanced key, otherwise by the steering column electronics control unit J527 "Terminal 15" request 2; supplied by the electrical steering column lock control unit J764 if the vehicle is equipped with the optional advanced key, otherwise by the steering column electronics control unit J527 Glass breakage sensor, rear window G304 for antitheft alarm "NO contact" signal; supplied by the steering column electronics control unit J527 if the vehicle is not equipped with the optional advanced key, otherwise by the electrical steering column lock control unit J764 if the vehicle is equipped with the optional advanced key Wake-up signal of the entry and start authorisation control unit J518 Brake lining/pad wear sender, front right G35 Ambient temperature sensor G17 Front right seat temperature sender G345 Front left seat temperature sender G344 Ground line to both front seat temperature sensorsLights in vehicle interior C21 C48 C51 C62 C72 Tail lights Function light in driving profile selection button (Drive Select) Hazard warning light system warning lamp K6 Function light in start-stop mode button Power supply to locating light terminal 58xs Activation of footwell lights, front left L151, front right L152, rear left L106 and rear right L107A57 A59 A60 A64 A65 A71 A72 C3 C6 C8 C9 C10 C11 C31 High level brake light bulb M25 Number plate light, left / right X4 / X5 Turn signal bulb, rear left M6 (side light) Reversing light bulb, right M17 (rear hatch light) Tail light bulb, right M2 (rear hatch light) Brake light and tail light bulb, left M21 (side light in comb. with basic tail light) Tail light and rear fog light bulb, left M41 (rear hatch light in comb. with basic tail light) or Rear fog light bulb, left L46 (rear hatch light in comb. with LED tail light) Turn signal bulb 2, rear right M81 (rear hatch light in comb. with LED tail light) Tail light and rear fog light bulb, right M42 (rear hatch light in comb. with basic tail light) or Rear fog light bulb, left L47 (rear hatch light in comb. with LED tail light) Brake light and tail light bulb, right M22 (side light in comb. with basic tail light) Turn signal bulb 2, rear left M80 (rear hatch light in comb. with LED tail light) Tail light bulb, left M4 (rear hatch light) Reversing light bulb, left M16 (rear hatch light) Turn signal bulb, rear right M8 (side light)17HeadlightsB1 B2 B4 B5 B10 B20 B21 B22 B23 B32 B36 B39 B45 C5 Dipped beam bulb, right M31 (with halogen lights) Main beam bulb, right M32 (with halogen lights) Daytime running light bulb, left L186 (with halogen lights) or Daytime running light and side light control unit, left J860 (with bi-xenon lights) Fog light bulb, right L23 Side light bulb, left L186 (with halogen lights) or Daytime running light and side light control unit, left J860 (with bi-xenon lights) Turn signal bulb, front right M7 Side light bulb, right M3 (with halogen lights) or Daytime running light and side light control unit, right J861 (with bi-xenon lights) Right dipped beam shutter motor V295 (with bi-xenon lights without AFS) Left dipped beam shutter motor V294 (with bi-xenon lights without AFS) Daytime running light bulb, right L188 (with halogen lights) or Daytime running light and side light control unit, right J861 (with bi-xenon lights) Turn signal bulb, front left M5 Main beam bulb, left M30 (with halogen lights) Fog light bulb, left L22 Dipped beam bulb, left M29 (with halogen lights)MotorsA3 A4 A6 A7 A9 A36 A37 A68 A69 Tank filler flap locking motor V155 Tank filler flap locking motor V155 Ground of SAFE function and central locking motors in the door locking unit, rear passenger side Central locking motor, rear passenger side V540 Central locking motor, rear hatch V53 Central locking SAFE function motor, rear driver side V537 Central locking SAFE function motor, rear passenger side V538 Ground of SAFE function and central locking motors in the door locking unit, rear driver side Central locking motor, rear driver side V539Other actuatorsA2 A5 B7 / A61 B8 / A62 B9 B46 Heated driver seat Z6 and heated driver seat backrest Z7 Heated passenger seat Z8 and heated passenger seat backrest Z9 Control line for washer pump V5 and rear window wiper motor V12 Control line for washer pump V5 and rear window wiper motor V12 Heater element, left washer jet Z20 and heater element, right washer jet Z21 Headlight washer system pump V11Signal linesA14 C67 "Terminal 15" signal for various control units Door contact signal for interior light control on overhead module18Electrical steering column lock control unit J764The electrical steering column lock control unit J764 is only fitted in an Audi A3 ’13 if the optional advanced key has been ordered.Installation location611_012Tasks and characteristics of the control unit • Communicating with other control units via the convenience CAN bus • Locking and unlocking the steering column • Terminal management master • Reading in the entry and start authorisation button E408 • Immobiliser usersUnlocking the steering column The steering column is unlocked after actuating the entry and start authorisation button E408 if a key belonging to the vehicle has subsequently been detected inside the vehicle. After unlocking the steering column, the NO contact and terminal 15 are activated and terminal 50 is requested, if required.Locking the steering column Locking of the steering column can be initiated by the following two events: • Opening the driver's door or • Locking the vehicle with the remote control key, the advanced key or the door lock The steering column is only locked if all of the following conditions have been met: • • • • • The steering column is unlocked The vehicle is travelling at speed of 0 kph The engine is running at zero rpm Terminal 15 and the NO contact have been deactivated The following condition also applies to vehicles with automatic transmission: the selector lever is in position "P"!Note The steering column lock is still implemented mechanically on models ordered without the optional advanced key. In these models, the terminals are managed by the steering column electronics control unit J527.19Entry and start authorisation control unit J518The Audi A3 ’13 only has an entry and start authorisation control unit J518 if the optional advanced key has been ordered.Installation location611_013Tasks and characteristics of the control unit • Communicating with other control units via the convenience CAN bus • Activating the five aerials for entry and start authorisation • Reading in both capacitive sensors in the driver and passenger door handles • Activating the locating light in the entry and start authorisation button • To wake up the onboard power supply control unit J519 via a wake-up line after contact with the door handle sensors is detected20Advanced KeyThe optional advanced key is available for the first time in an Audi A3 in the Audi A3 ’13. The advanced key function includes a keyless entry and start system. The advanced key of the Audi A3 ’13 is based on the well-known system used in the Audi A1. Unlike the Audi A1, the advanced key in the Audi A3 has an additional operating point in the passenger door and an additional aerial for entry and start authorisation. If the optional advandced key is ordered, the vehicle has the following two additional control units: • Entry and start authorisation control unit J518 and • Electrical steering column lock control unit J764Terminal 30 Terminal 30Entry and start authorisation control unit J518Electronic steering column lock control unit J764"Terminal 15" - signal 1 "Terminal 15" - signal 2"Wake up" lineOnboard power supply control unit J519NO contactInternal aerial for central central locking systemEngine control unit J623611_015Key: E408 G415 G416 R134 R135 R136 R137 R138 Entry and start authorisation button Exterior door handle touch sensor, driver side Exterior door handle touch sensor, front passenger side Driver side aerial for entry and start authorisation Front passenger side aerial for entry and start authorisation Rear bumper aerial for entry and start authorisation Luggage compartment aerial for entry and start authorisation Interior aerial -1- for entry and start authorisationTerminal 50 requestConvenience CAN busGear selector lever position "P"Terminal 58xt21Aerials for entry and start authorisation The entry and start authorisation control unit J518 activates the five aerials for entry and start authorisation.They are installed in the following positions:611_016611_019Installation location of driver side aerial for entry and start system R134 On the underbody in the area of the B postInstallation location of luggage compartment aerial for entry and start authorisation R137 Under the rear seat611_017611_020Installation location of passenger side aerial for entry and start system R135 On the underbody in the area of the B postInstallation location of interior aerial -1- for entry and start system R138611_018Installation location of rear bumper aerial for entry and start system R13622Unlocking and locking the vehicle with the advanced key The entry and start authorisation control unit J518 reads in the two capacitive door handle sensors, G415 and G416. An unlocking and locking input can be sent to the advanced key function via these sensors. The two capacitive sensors are located in the driver and passenger side door handles. No door handle sensors are fitted in the rear doors on five-door Audi A3 models. To unlock the vehicle with the advanced key, the driver must grip the door handle in the driver or passenger door. To lock the vehicle, contact must be made with the marked surface (framed rectangle) on the door handle. After the system has detected an unlocking or locking input, a scan of the ignition key is initiated. To this end, the system activates its five aerials and receives a reply from the vehicle key via the central locking aerial. The system uses this reply to check whether the key is authorised and within the radius of the operating point. If all conditions for unlocking or locking are met, the onboard power supply control unit initiates the corresponding operation. For this purpose, it transfers the unlock or lock commands to the convenience CAN bus. The commands are then received by the door control units. The door control units subsequently unlock or lock the vehicle doors.Turning on the ignition To turn on the ignition in vehicles with the optional advanced key, the entry and start authorisation button E408 must be pressed. If all conditions for turning on the ignition are met, the system first initiates the unlocking of the steering column. After the steering column has been successfully unlocked, the "terminal 15" relay J329 is activated and the ignition turned on. If the conditions for starting the engine have been met during this process, this is indicated to the engine control unit via a signal line and additionally via CAN bus. The engine control unit then activates both starter relays. The starter is energised, the injection cycle commences and the vehicle engine starts up.Reference Three TV programmes on the "advanced key" were published in Audi Training Online (ATO). The first programme covering the basics of the advanced key and system operation was broadcast in December 2011. This was followed in April 2012 by a second programme on the system processes and a third programme on the different system versions used in the various Audi models.23Terminal managementImplementation of the terminal management system in an Audi A3 ’13 without advanced key Technical implementation of the terminal management system depends to a large extent on whether the Audi A3 ’13 is equipped with the optional advanced key or not. On models without an advanced key, the steering column electronics control unit J527 is the terminal management master. On models with an advanced key, this task is performed by the electronic steering column locking control unit J764. The technical implementation of the terminal management system is described below for an Audi A3 without an advanced key.Terminal 30 Gear selector position "P"Convenience CAN busSteering column switch moduleIgnition starter switchIgnition key removal lockSteering column electronics control unit J527Terminal 15 request 1 Terminal 15 request 2 NO contactOnboard power supply control unit J519Terminal 30Powertrain CAN busEngine control unit J623Terminal 50 diagnostics Terminal 50Terminal 50 requestTerminal 15Terminal 15611_022Key: J329 J906 J907 Terminal 15 voltage supply relay Starter relay 1 Starter relay 224Steering column switch module The ignition key removal lock, the ignition starter switch and the steering column electronics control unit J527 are all components of the steering column switch module. The steering column electronics control unit J527 reads in the sensors in the ignition starter switch continuously and activates the ignition key removal lock as required.Terminal 15 The task of the steering column electronics control unit J527 (the terminal management master) is to determine the status of terminal 15. For this purpose, it reads in the NO contact sensor and both "terminal 15 request" sensors. However, it is the task of the onboard power supply control unit to activate the terminal 15 voltage supply relay ("terminal 15" relay). To this end, it reads in the following three signal lines: • Terminal 15 request 1 • Terminal 15 request 2 • NO contact The information is transferred to the signal lines by the steering column electronics control unit J527 and erflects the status of the three sensors in the ignition starter switch. If voltage is measured in two of the three signal lines from the onboard power supply control unit J519, the "terminal 15" relay J329 is activated and the ignition turned on. With this configuration, it is still possible to start the vehicle even if a fault occurs in one of the three sensors in the ignition starter switch.Generating the individual terminal status signals To generate the various terminal status signals, the steering column electronics control unit J527 reads in the sensors in the ignition starter switch continuously. The ignition starter switch consists of the following four sensors: • • • • NO contact sensor Terminal 15 request sensor 1 Terminal 15 request sensor 2 Terminal 50 request sensorThe steering column electronics control unit J527 continuously generates the current status signals for terminals 15, 50 and 75 and the NO contact based on the signals provided by these sensors. The current terminal status signal is continuously transmitted to the other control units via the convenience CAN.Terminal 50 The engine control unit receives the requests to start the internal combustion engine from the steering column electronics control unit J527. The request is sent across a signal line and additionally via CAN bus. The engine control unit activates both starter relays (J906 and J907). To this end, the engine control unit closes its internal switches and connects both relay lines to ground. Both relays then close their switching contacts and terminal 50 is available to the starter. A protected diagnostic line allows the engine control unit to check whether terminal 50 has actually been switched.NO contact The NO contact is activated by inserting the ignition key into the ignition starter switch. If this is detected by the steering column electronics control unit J527 by reading in the NO contact sensor, it transfers the information "NO contact on" to the CAN bus and to a signal line routed to the onboard power supply control unit J519. There exists no "NO contact" line for supplying consumers. The NO contact is deactivated by removing the ignition key from the igniton starter lock. This information is also acquired by reading in the NO contact sensor.Terminal 75 No separate "terminal 75" relay is fitted in the Audi A3 ’13. Other control units receive the current status of "terminal 75" from the steering column electronics control unit J527 via the CAN bus.25How terminal management is implemented in an Audi A3 ’13 with advanced keyTerminal 30Gear selector position "P"Convenience CAN busElectrical steering column lock control unit J764Terminal 15 request 1 Terminal 15 request 2 NO contactOnboard power supply control unit J519Terminal 30Terminal 50 requestTerminal 15Terminal 15Powertrain CAN busEngine control unit J623Terminal 50 diagnostics Terminal 50611_023Key: E408 J329 J906 J907 Entry and start authorisation button Terminal 15 voltage supply relay Starter relay 1 Starter relay 226Electrical steering column lock control unit J764 If an Audi A3 ’13 is equipped with the optional advanced key, an entry and start authorisation button is fitted in the vehicle in place of an ignition starter switch. The customer can turn the ignition and internal combustion engine on and off using the entry and start authorisation button E408.Terminal 50 The engine control unit receives the request to start the internal combustion engine from the electronic steering column lock control unit J764. The request is sent across a signal line and additionally via the convenience CAN bus. The engine control unit activates both starter relays (J906 and J907). To this end, the engine control unit closes its internal switches and connects both relay lines to ground. Both relays then close their switching contacts and terminal 50 is available to the starter.Entry and start authorisation button E408 Button E408 consists of two microswitches. Both are read in by the electronic steering column locking control unit J764. They are actuated as long as button E408 is pressed. The electronic steering column locking control unit J764 determines the current status of terminals 15, 50 and 75 and the NO contact by continuously reading in the microswitches. The current terminal status signal is continuously transmitted to the other control units via the convenience CAN. If either of the microswitches in the entry and start authorisation button E408 is faulty, the vehicle can no longer be started. In this case, too, it is no longer possible to turn on the ignition. The internal combustion engine can be shut off with a push of the button one more time only. A protected diagnostic line allows the engine control unit to check whether terminal 50 has actually been switched.Terminal 75 No separate "terminal 75" relay is fitted in the Audi A3 ’13 any longer. The other control units receive the current status of "terminal 75" from the electronic steering column lock control unit J764 via the convenience CAN bus.NO contact and terminal 15 After pressing the entry and start authorisation button E408, a check is subsequently made of the advanced key. If this check is successful, the electronic steering column locking control unit J764 activates the NO contact and turns on the ignition. To turn on the ignition, voltage is applied to the following three signal lines: • Terminal 15 request 1 • Terminal 15 request 2 • NO contactOnboard power supply control unit J519 The three signal lines are read in by the onboard power supply control unit J519. If voltage is present in at least two of the three signal lines, the "terminal 15" relay J329 is activated and the ignition is turned on. As a result, it is still possible to start the vehicle in the event of an open circuit in one of the three signal lines.27Interior lightTwo versions are available for the Audi A3 ’13 in combination with the interior light: 1. Basic interior light (PR number: QQ0) and 2. Interior light package (PR number: QQ4) The optional "vanity lights" (PR number: QQ5) can be ordered in addition to the basic trim. In combination with the basic trim, the vanity lights use bulb technology.Standard interior light trim In the basic trim, the lights in the vehicle interior use bulb technology. The lights are located in the overhead module, luggage compartment and glove compartment. The lights are powered by the switched terminal 30. There are no door warning lights with the basic interior light. Red reflectors are fitted in their place.Optional equipment Vanity lightsTerminal 30gOnboard power supply control unit J519Door contact signalTerminal 30gDoor contact signalConvenience CAN buswith bulbsGround611_024Key: 1 2 3 4 5 Vanity lights, left or right Light in glove compartment Luggage compartment light Interior lights in basic overhead module Basic rear lights28The interior light package in combination with MMI radio or MMI Navigation plus If the interior light package and the MMI radio or MMI navigation plus system is ordered for an Audi A3 ’13, the brightness of the interior lights can be adjusted individually. A brightness adjustment option can be found in the Car menu. If the interior light package is ordered, an LED module is fitted at the front and rear lights in the back. The LED overhead module comprises two reading lights and a central background light which uses LED technology. In addition, the vehicle is equipped with four LED footwell lights and the cupholder is also illuminated with LEDs. The vanity lights in the interior light package also use LED technology. Active door warning lights using bulb technology and door entry lights using LED technology are fitted in the doors. The inner handles on the driver's door are also illuminated. The loudspeaker lighting shown in the overview diagram for Premium Sound (13) is an optional feature. This option is available only in combination with an optional radio and cannot be combined with the Audi radio.Terminal 30g Door contact signalOnboard power supply control unit J519Terminal 30gLED overhead moduleRear lightsFive-door A3 models onlyConvenience CAN busFive-door A3 models onlyDoor control unit, rear driver side J926Door control unit, driver side J386Door control unit, passenger side J387Door control unit, rear passenger side J927611_025with LED technologyKey: 1 2 3 4a 4b 5 6 Vanity lights, left or right Light in glove compartment Luggage compartment light Reading lights in LED overhead module Rear lights Background light in LED overhead module Cupholder light 7 8 10 11 12 13 Front footwell lights Rear footwell lights Active door warning light Door entry light Inner door handle light Premium Sound loudspeaker lightingwith bulbsIn an Audi A3 ’13 equipped with halogen headlights, the cupholder light (6) is activated via pin C3 of the onboard power supplycontrol unit. In an A3 ’13 with bi-xenon headlights, it is activated via pin B2.29The interior light package in combination with Audi radio In an Audi A3 ’13 with interior light package and Audi radio (PR number: I8A), the following differences exist compared to the interior light package with MMI radio or MMI Navigation plus: • The cupholder light is powered by terminal 58xs • There is no Car menu for setting the brightness • The footwell lights are operated as entry and exit lights only • The Premium Sound option cannot be ordered in combination with Radio EntryTerminal 30g Door contact signalOnboard power supply control unit J519Terminal 58xsTerminal 30gLED overhead moduleRear lightsFive-door A3 models onlyConvenience CAN busFive-door A3 models onlyDoor control unit, rear driver side J926Door control unit, driver side J386Door control unit, passenger side J387Door control unit, rear passenger sideJ927611_026with LED technologywith bulbsKey: 1 2 3 4a 4b 5 Vanity lights, left or right Light in glove compartment Luggage compartment light Reading lights in LED overhead module Rear lights Background light in LED overhead module 6 7 8 10 11 12 Cupholder light Front footwell lights Rear footwell lights Active door warning light Door entry light Inner door handle light30Setting options in the Car menu In the Car menu, the customer can adjust the brightness of the background lights under the menu item "Vehicle settings / Background lighting". For this purpose, the vehicle is subdivided into different zones, the brightness of which can be adjusted separately. These are the following three zones: • "Front" zone • "Footwell" zone • "Door" zoneThe actual zones displayed in the MMI menu depends on what optional equipment has been ordered. The following optional equipment displays the following zones in the MMI menu: 1. Interior light package 2. Premium Sound If at least two zones are available as options in the MMI menu, the setting option "All zones" is offered and allows all zones to have the same setting.ð ð "Front" & "footwell" zones "Door" zone611_027Only the background lights react to brightness adjustments made via the Car menu. The following lights are integrated in the background lighting: • Footwell lights • Cupholder light • Premium Sound loudspeaker lights31Power supply to interior and background lights Terminal 58 The task of terminal 58 is to control the instrument and display lighting in the vehicle and the locating lights of the buttons and switches. This is done in dependence on the current brightness level in the vehicle interior and the current customer setting for basic brightness. The brightness in the vehicle interior is measured by a photosensor in the instrument cluster and transmitted to the onboard power supply control unit J519 via the convenience CAN bus: The customer can set the desired basic brightness of the interior lighting using the retractable control dial on the rotary light switch. The setting is transferred to the onboard power supply control unit J519 via LIN bus. The duty cycles of the pulse width modulated (PWM) signals of terminals 58xs, 58xt and 58xd are calculated from both input variables.Light switch E1Control unit in dash panel insert J285PhotosensorPotentiometerResistance PotentiometerBrightness PhotosensorTerminals 58xs, 58xt and 58xdOnboard power supply control unit J519Photosensor brightness PotentiometerTerminal 58xsLocating light Switch Lighting Hazard warning light switchTerminal 58xtTerminal 58xsTerminal 58xtTerminal 58xd611_028A distinction is made between three different versions of terminal 58: Terminal 58xs (formerly terminal 58s): Terminal 58xt (formerly terminal 58t): Terminal 58xd (formerly terminal 58d): Switch locating light Switch locating light with advance and trail functions Display and instrument lighting32Terminals 58xs and 58xd are active as long as the side lights or dipped beam are activated on the vehicle. Terminal 58xt corresponds to terminal 58xs with additional advance and trail function. It is pre-activated if, for example, one of the following events occurs: • Vehicle is unlocked • A vehicle door is opened • The ignition is turned on Terminal 58xt is deactivated if, for example, the following event occurs: • The ignition is turned off.The onboard power supply control unit transfers the values calculated for terminals 58xs, 58xt and 58xd to other control units via the CAN bus. The control units to which lights or a display is connected generate a corresponding PWM signal from these values in order to control the brightness of the lights.The light can be dimmed up or down by a variable duty cycle of the PWM signal.Switched terminal 30 (terminal 30g) The signal for switched terminal 30 is generated by the onboard power supply control unit J519. This is used only to power lights in the vehicle interior.The following events lead to the activation of terminal 30g: • Turning on the ignition • Manual activation of lights powered via terminal 30gThe following events lead to the deactivation of terminal 30g: • The run-on time of terminal 30g has expired (timer starts when ignition is turned off) • The vehicle is locked or safed if:• Unlocking a vehicle door or the rear hatch • no vehicle door is open • Opening a vehicle door or the rear hatch • Removing the ignition key • Turning the rotary light switch and • the rear hatch is closed and • the interior light is dimmedThe following lights in the new Audi A3 ’13 are powered by the onboard power supply control unit with terminal 30 switched: • Light in glove compartment • Luggage compartment light • Footwell lights • Vanity lights in the sun visors • Interior light bulb in overhead module • Reading lights33Driver assistance systemsReversing cameraWith the launch of the new Audi A3 ’13, the reversing camera system is available in an Audi A3 for the first time. This is a videobased park assist system which greatly simplifies parking in reverse. The reversing camera system has been available in Audi models since 2006.Installation location of the reversing camera system control unit J772611_029The reversing camera is integrated subtly into the rear hatch handle, from where it monitors the area behind the vehicle. A semiconductor chip in the reversing camera is used to capture images. This image capture sensor uses CMOS technology and captures colour images with a horizontal resolution of 640 pixels and a vertical resolution of 492 pixels.The camera lens has a dirt repellent coating. If the lens should nevertheless be dirty, it is the task of the driver to clean it. The driver can tell if the lens is dirty by the deteriorating image quality on the display. A dirty lens detection system with driver warning is not presently implemented.611_030 34System implementationTerminal 30Terminal 30High lineLow lineInformation electronics control unit 1 J794Infotainment CAN busReversing camera system control unit J772Power supply CameraCamera groundReversing camera R189Shielding Video lineShielding Video line611_031The reversing camera R189 is powered by the reversing camera system control unit J772. The camera image is transferred from the camera R189 to the control unit J772 by shielded video line. The incoming raw image captured by camera R189 is dewarped in control unit J722. The control unit J722 also adds guide lines and areas to the camera image. To display the customer as high a quality an image as possible, it is necessary to calibrate thesystem. A single calibration is performed after the vehicle has been assembled at the plant and must be repeated after carrying out various types of work on the vehicle or damage to the vehicle. The dewarped image is then transferred to the information electronics control unit 1 J794 by video line. To transfer control commands and required vehicle information, both control units J722 and J794 are connected to the convenience CAN.Reference For further information on the reversing camera, refer to Self Study Programme 375 "Audi Q7 – New driver assist systems".35Park assistPark assist is also available as an option with the new Audi A3 ’13. This is the Generation 2.0 Audi parking system first featured on the Audi A7 Sportback in 2010. The system has the same range of functions as that described in Self Study Programme 600, the new model having received only minor modifications. The Audi parking system control unit J791 is a new development and will in future serve as the parking aid and park assist control unit in Modular Longitudinal Platform (MLP) models. The most obvious changes is the smaller size of the control unit and the reduction in the number of connectors to two.611_032System implementationTerminal 15Convenience CAN HighConvenience CAN LowAudi parking system control unit J791611_033Key: E266 E581 G203 G204 G205 G206 G252 G253 G254 G255 Parking aid button Audi parking system button Rear left parking aid sender Rear centre left parking aid sender Rear centre right parking aid sender Rear right parking aid sender Front right parking aid sender Front centre right parking aid sender Front centre left parking aid sender Front left parking aid sender G568 G569 G716 G717 H15 H22 J791 Front left parking aid steering sender, left-hand side of vehicle Front right parking aid steering sender, right-hand side of vehicle Rear left parking aid steering sender Rear right parking aid steering sender Rear parking aid warning buzzer Front parking aid warning buzzer Audi parking system control unit36Parking assistance in parallel parking spots The requirements relating to the size of parallel and perpendicular parking spots are unchanged compared to the park assist system of the C7 platform. Park assist provides parking assistance in parallel parking spots if the parking spot is at least 0.8 metres longer than the Audi A3.611_034Parking assistance in perpendicular parking spots Park assist provides parking assistance in perpendicular parking spots if the parking spot is at least 0.7 metres wider than the vehicle. The park assist system parks the A3 in such a way that on the completion of the parking manoeuvre the vehicle is the same distance from both neighbouring vehicles.611_03537Audi side assistThe new Audi A3 ’13 offers Audi side assist for the first time in an A3 model.611_036The task of Audi side assist is to monitor the area behind and to the side of the vehicle using radar sensors, and to assist the driver when changing lane. The monitored area also includes the socalled "blind spot". This is monitored on both the driver and passenger sides. There is a dedicated radar sensor for each side.If Audi side assist detects a critical situation which could result in an accident were the driver to change lane, the system informs or warns the driver. The driver is informed by intensive flashing of the warning light in the door mirror on the side of the vehicle where the hazard has been detected.Reference For further information on "Audi side assist", refer to Self Study Programme 375 "Audi Q7 – New driver assistance systems".38Implementation of the function on the vehicle Two additional control units are fitted behind the rear bumper cover in models with the Audi side assist option: the Audi side assist control unit J769 and Audi side assist control unit 2 J770. Each control unit is responsible for monitoring one side of the vehicle or adjacent lane and consists of a central processor unit and a radar sensor. The Audi side assist control unit J769 is the master control unit of the function, and is also an extended CAN bus user. It monitors the right-hand side of the vehicle. The Audi side assist control unit 2 J770 is the slave control unit and communicates with the master control unit via a private CAN bus. It monitors the left-hand side of the vehicle. The control unit J770 is also responsible for activating both Audi side assist warning lamps in the door mirrors.Terminal 15Audi side assist control unit J769CAN Private High CAN Private LowAudi side assist control unit 2 J770Audi side assist warning lamp in driver side door mirror K233Audi side assist warning lamp in passenger side door mirror K234 High line Low lineExtended CAN bus611_038There is no separate button in the Audi A3 ’13 for activating the assist function. The function is activated and deactivated in the MMI.The setting made is assigned to the ignition key in the Audi side assist control unit and hence customised.611_03939Front camera for driver assistance systems R242A new front camera is used in the Audi A3 ’13 - a black and white camera with an additional red light detector. It has a resolution of 1024 x 512 pixels and an aperture angle of 46 degrees. The system is supplied by BOSCH. As with the front camera for driver assistance systems R242 in the Audi Q3, the front camera of the Audi A3 ’13 has a powerful central processing unit which eliminates the need for an additional image processing control unit.611_040The front camera for driver assistance systems R242 is used in the following driver assistance systems: • Audi active lane assist • Camera-based traffic sign recognition • Headlight assist (digital version – "hard" changeover between high and low beam) • Intelligent light system (analogue version – adapts the headlight range continuously to the conditions) • adaptive cruise control (ACC)!40Note Calibration tool VAS6430 is required by servicing personnel to calibrate the camera. For further information about the calibration procedure, refer to the relevant workshop manual.Influence of the front camera R242 on the ACC function If adaptive cruise control (ACC) is ordered with the Audi A3 ’13, this does not necessitate fitting the front camera for driver assistance systems R242. The optional ACC system can be used in the Audi A3 ’13 without the need for a front camera. However, installing the front camera R242 on the vehicle allows the ACC system to respond predictively to traffic situations. This improvement is achieved by monitoring the positions of vehicles driving ahead. By continuously monitoring the traffic, the system can tell when a vehicle driving ahead in the same lane is about to change lanes. The system can also tell whether a vehicle driving ahead is about to change from an adjacent lane to its own lane. This information is factored into the ACC control algorithm, resulting in smoother and more predictive control response.Electrical connections of the front camera for driver assistance systems R242 A new CAN bus is used for exchanging data between the front cameras R242 and the ACC control unit J428: the CAN sensor. This is a high-speed CAN bus and is used solely for exchanging data between both control units. Control units R242 and J428 are also extended CAN bus users. The Audi lane assist windscreen heater Z67 is also connected to the front camera for driver assistance systems R242. It can be used to remove condensation and ice from the camera lens, when needed.Terminal 15Terminal 15Extended CAN bus HighAudi lane assist windscreen heater Z67Extended CAN bus LowFront camera for driver assistance systems R242CAN Sensor HighACC control unit J428CAN Sensor Low611_04141Audi active lane assistThe Audi active lane assist system in the Audi A3 ’13 is based on the system used in the Audi A6/A7. As regards system control response, the driver can again choose between two system modes, i.e. "early" or "late" corrective steering input. A key difference between this and Audi active lane assist in the Audi A6/A7 is that the function is now fully integrated in the front camera for driver assistance systems R242. Another difference is that the auxiliary functions "intentional lane change without turn signal activation" and "system response to detected obstacles in adjacent lane" are not implemented (for more information on both auxiliary functions, refer to pp. 30/31 of SSP 483).Corrective steering input "early"611_042The "early" corrective steering input mode helps drivers to keep their vehicle in the centre of the lane.In this mode, corrective steering inputs are made continuously in order to keep the vehicle in the centre of its lane.Corrective steering input "late"611_043The "late" corrective steering input mode helps drivers to avoid inadvertently leaving their lane.In this mode, corrective steering inputs are not made until the vehicle has already moved close to the lane marker line.Reference For more detailed information about Audi active lane assist, please refer to Self Study Programme 483 "Audi A7 Sportback – Convenience electronics and Audi active lane assist".42Camera-based traffic sign recognitionThe camera-based traffic sign recognition system is available in the Audi A3 ’13 for the first time. This is an advanced version of the speed limit display function, which was offered for the first time at launch of the Audi A7 Sportback. To identify the traffic signs which appear on the display, the camera-based traffic sign recognition system uses three main sources of information: 1. The information on detected traffic signs extracted from the camera images by the image processing software. 2. Information extracted from the predictive route data which the navigation unit in the information electronics control unit 1 J794 makes available to the other control units. 3. The statutory speed limits stored in the front camera for driver assistance systems R242 for each road type in the various countries611_044In addition to the introduction of the new designation "camerabased traffic sign recognition", the following significant changes have been made: • The function now also displays overtaking bans • The number of markets in which the function is available has been increased to include the following countries: Slovenia, Bulgaria, Greece, Romania, Hungary, Croatia and SlovakiaThe "camera-based traffic sign recognition" function requires the following hardware in the Audi A3 ’13: • Front camera for driver assistance systems R242 (master control unit of the function) • MMI Navigation plus • Instrument cluster with colour multifunction displayThe driver has the following adjustment options in the MMI: • Extended display On / Off • Display "Signs for trailers": On / OffReference For further information about the speed limit display, refer to SSP 482 "Audi A7 Sportback Head-up Display and Speed Limit Display".43Display of traffic signs in the multifunction display Display of three speed limits in full-screen format Up to three speed limits can be displayed simultaneously on the full-screen display. The additional signs accompanying the speed limits are displayed below the speed limits. The camera-based traffic sign display system can display the following a