SSP398 - Audi lane assist 398All rights reserved. Technical specifications subject to change without notice.Copyright AUDI AG I/VK-35 Service.training@audi.de Fax 841/89-36367AUDI AG D-85045 Ingolstadt Technical status: 04/07Printed in Germany A07.5S00.38.20Audi lane assistSelf-Study Programme 398Vorsprung durch Technik www.audi.deService Training PrefaceTo mark the launch of the new Q7 premium SUV, Audi extended its range of driver assist systems to include two new systems: the radar-assisted "Audi side assist" system and the rear-view camera. Both systems met with a very encouraging response from customers and experts alike. They once again emphasise the fact that Audi takes its slogan "Vorsprung durch Technik" very seriously.A logical consequence of this is that Audi is now extending this range to include a new system: Audi lane assist. This system helps the driver to stay in lane.In the event that the driver is inattentive or distracted, the vibrating steering wheel can warn when the vehicle is about to leave its lane. The aim is to help avoid accidents.Despite the availability of this technology, however, it is still imperative that motorists only get behind the steering wheel when they feel fit to drive. Audi lane assist is a driver assist system designed to help the driver. However, the responsibility for staying in lane ultimately rests with the driver.Under current plans, Audi lane assist will be available on models A4, A5, A6, Q7 and A8.Excellence in design & performanceò98_036ò98_035 NoteReferenceThe self-study programme teaches the design and function of new vehicle models, new automotive parts or new technologies. The self-study programme is not a repair manual! All values given are intended as a guideline only, and refer to the software version valid at the time of publication of the SSP.For maintenance and repair work, always refer to the current technical literature.ContentsFunction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4Displays . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10System overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17System calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21Diagnostics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25Electrical components . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13Communication structure . . . . . . . . . . . . . . . . . . . . . . . . . 18 4FunctionAudi lane assist helps the driver to stay in lane. A camera is used for detecting lane markers. Audi lane assist is "on alert" when lane markers are detected on either side of the lane in which the vehicle is driving. When the vehicle approaches a detected lane marker and is about to leave the lane in which it is driving, Audi lane assist alerts the driver by making the steering wheel vibrate. If Audi lane assist is "on alert" and the driver indicates before crossing a lane marker, no warning is given because the system assumes that the lane change is deliberate.The steering wheel vibrates once only in order to alert the driver when the vehicle is approaching or crossing a detected lane marker. A second warning is only given if the vehicle has moved a sufficient distance away from the lane marker after the first warning and subsequently approaches the lane marker again. This avoids warnings being given continuously when the vehicle is travelling in parallel with a lane marker.The system is designed for use on motorways and trunk roads. For this reason, it does not become active until the vehicle is travelling at a speed of approx. 65 kph or higher.Adverse ambient conditions, e.g. dirty or snow- covered road surface, a lane being too narrow or ambiguous lane markers such as occur in road works on motorways, may result in the system being temporarily unavailable. Current system status is indicated to the driver on the dash panel insert.FunctionNoteAudi lane assist is a driver assistance system. The system helps the driver to avoid leaving a lane inadvertently by issuing an alert warning before the vehicle crosses detected lane markers. However, the responsibility for staying in lane ultimately rests with the driver!398_037398_034 5DisplaysWarning lamp on dash panel insertPossible states of the warning lampIf the warning lamp on the dash panel insert is lit green, the system is active and "on alert".If the warning lamp on the dash panel insert is lit yellow, this means that the system is active but not "on alert" due to the prevailing conditions.In this condition, Audi lane assist does not assist the driver and gives no alert warnings. Possible reasons for deactivation are given below.If Audi lane assist warning lamp is not lit, then the system is inactive.To activate the system, push the Audi lane assist button on the indicator stalk.398_002 6DisplaysIf the yellow warning lamp is lit on the dash panel insert, this can be due to the following reasons:lThere is only one or no lane marker.lThe system is not detecting lane markers (e.g. due to snow, dirt, wet, backlight).lThere are more than two lane markers in the lane in which the vehicle is travelling (e.g. white and yellow markers at road works).lThe vehicle is travelling at less than the minimum activation speed of approx. 65 kph.lThe lane is narrower than approx. 2.5 m or wider than approx. 5 m.lThe curve is too tight (curve radius less than approx. 250 m).Additional function display in the Audi A4 and A5 CoupéAn Audi A4 and A5 Coupé with Highline dash panel insert offers an additional function display which indicates the current status of the adaptive cruise control (ACC) and Audi lane assist systems. The following examples show the combined colour display:The graphic display indicates the following: adaptive cruise control:active, the system has detected a vehicle Audi lane assist:not installed or switched off398_024The graphic display indicates the following: adaptive cruise control:off or in Standby mode Audi lane assist:not installed or switched off398_025 7The graphic display indicates the following: adaptive cruise control:active, the system has detected a vehicle Audi lane assist:switched on, but inactive (not "on alert")The graphic display indicates the following: adaptive cruise control:active, driver is requested to take control Audi lane assist:switched on and active ("on alert")The graphic display indicates the following: adaptive cruise control:active, the system is not detecting a vehicle Audi lane assist:switched on, active ("on alert") and alert warning on left-hand sideThe graphic display indicates the following: adaptive cruise control:no ACC installed! Audi lane assist:switched on, active ("on alert") and alert warning on right-hand side398_026398_027398_028398_029NoteIf an Audi A4 and A5 Coupé with Highline dash panel insert only has either of the two optional extras, only the graphic relevant to the function is shown on the colour display. 8Displaysadaptive cruise control is not available as optional equipment for the Audi A4 and A5 Coupé with Lowline dash panel insert. The Highline dash panel insert is a mandatory in combination with ACC. If the vehicle is equipped with Audi lane assist, however, the additional function displays are as follows:The graphic display indicates the following: adaptive cruise control:no ACC installed! Audi lane assist:switched offThe graphic display indicates the following: adaptive cruise control:no ACC installed! Audi lane assist:switched on, but inactive (not "on alert")The graphic display indicates the following: adaptive cruise control:no ACC installed! Audi lane assist:switched on and active ("on alert") (Neither of the two lane markers is flashing! No warning is given.)The graphic display indicates the following: adaptive cruise control:no ACC installed! Audi lane assist:switched on and active ("on alert"). The right lane marker is flashing. This means that Audi lane assist is alerting the driver to the fact that the vehicle has crossed the right lane marker!398_030398_031398_032398_033 9The message "Audi lane assist unavailable: sensor currently has no visibility" may be displayed for the following reasons:1The exterior of the camera viewing window is dirty or iced-up. In this event, the driver should de-ice or clean the viewing window as required.2The camera viewing window is misted on the inside. In this case, it is recommended to wait until the system has been de-misted.3No lane markings are detectable due to the prevailing road conditions (e.g. snow-covered or dirty).Text messages on the dash panel insert centre displayThe message "Audi lane assist currently unavailable" is displayed when a temporary fault occurs.An attempt should be made to activate the system a short time later.The can, for example, be due to excess temperature inside the control unit.The message "Audi lane assist unavailable: system fault" is displayed in the event of a fault of such severity that it is necessary to take the vehicle to an Audi Service Partner. Audi lane assist should be checked by an authorised service station at the next opportunity.Possible reasons for this are a faulty control unit, a faulty vibration motor or a faulty Audi lane assist button.The same display appears when status "System not calibrated" is indicated on ...
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