Audi Workshop Service and Repair Manuals

Calibrating lane change assist control unit -J769-/-J770- Special tools and workshop equipment required

t  Calibration unit -VAS 6350- Requirements –  The lane change assist control unit -J769-/-J770- must be calibrated in „Guided Fault Finding“ or „Guided Functions“ mode → Vehicle diagnostic tester under the following conditions: l  If lane change assist control unit -J769- or lane change assist control unit 2 -J770- has been renewed. l  If the rear bumper cover has been damaged, for instance when parking the car. l  If the rear bumper cover has been removed and installed. l  If the event memory contains the entry „no or incorrect basic setting/adaption“. Preparations –  The vehicle must be standing on a firm and even surface. –  Apply parking brake – the vehicle must not be moved while the calibration procedure is being performed. –  Make sure steering wheel is at centre position with wheels pointing straight ahead. –  Connect vehicle diagnostic tester → Vehicle diagnostic tester.   Note If a fault message appears on the display, refer to → Operating instructions for vehicle diagnostic tester. –  Switch on ignition. –  Remove any stickers with metal film from the bumper cover.

–  Fit three suitable wheel bolt adapters onto each wheel centre mounting -VAS 6350/1-. –  Fit measuring paddle onto each of the wheel centre mountings -VAS 6350/1- and secure each paddle with lock nut. –  Fit wheel centre mountings -VAS 6350/1- onto wheel bolts on both rear wheels. l  Centre of rotation of wheel centre mounting must align with centre of rotation of wheel.   Note When fitting the wheel centre mountings -VAS 6350/1- onto the wheels, make sure that the „anti-theft wheel bolts“ do not come into contact with the wheel centre mounting. –  Use lock nuts to adjust measuring paddles so that they are free to move just slightly above the ground. l  Measuring paddles must move freely. l  Measuring paddle must be in an upright position.

–  Position the calibration unit -VAS 6350- at a distance of -a- from rear wheels. l  Dimension -a- = 1,700 mm

–  Switch on spacing laser -VAS 6350/2- by pressing ON button. Display on -VAS 6350/2-: l  „- - - m“   Note The laser is switched on simultaneously.

–  To measure distance, hold spacing laser -VAS 6350/2--item 2- flush with locating bracket (right-side) as shown in illustration. l  Spacing laser -VAS 6350/2- must be steady and flush with locating bracket. –  Make sure that laser beam for distance measurement hits lower (larger) part of measuring paddle -1-. If this is not the case, adjust height of measuring paddles using lock nuts on wheel centre mountings -VAS 6350/1-.

–  Press ON button briefly to measure distance. Display on -VAS 6350/2-: l  „1.700 m“ (specification: 1,700 ± 2 mm). –  Repeat measurement from locating bracket (left-side) to rear left wheel. l  Measured distance value must be identical on both sides. If the two measured values are not identical, re-align calibration unit -VAS 6350-. –  After selecting the function „Lane change assist“, select the path „Calibration“.   Note t  The system will now inform you which lane change assist version is fitted in the vehicle (e.g. version SWA1.0). t  This information for setting the calibration unit is important for the work sequence to be followed and to avoid malfunctions.

–  Secure calibration unit for lane change assist -VAS 6350/4- to mounting bracket (rear right) on calibration unit -VAS 6350-. l  Voltage supply must be connected to bottom left of calibration unit for lane change assist (in direction of travel) Dimension -a- (measured between top edge of calibration unit and ground).

Setting dimension (height) in mm	Saloon up to model year 2012	Avant up to model year 2012	allroad up to model year 2012	Saloon from model year 2013 onwards	Avant from model year 2013 onwards	allroad from model year 2013 onwards
	700	700	770	765	783	823

–  Pointer at base of calibration unit for lane change assist -VAS 6350/4- must align with setting dimension on graduated scale -1- at measuring field -arrow-.

Setting dimension (right-side) in mm		Saloon up to model year 2012	Avant up to model year 2012	allroad up to model year 2012	Saloon from model year 2013 onwards	Avant from model year 2013 onwards	allroad from model year 2013 onwards
SWA 1.0		586
SWA 1.5		745	745	830
SWA 2.0					592	641	643
Read off from measuring scale -1-.

–  Connect calibration unit for lane change assist -VAS 6350/4- up to voltage supply.

–  Align calibration unit -VAS 6350- horizontally by turning plastic feet. l  Check spirit level on calibration unit -VAS 6350--arrow-.

–  Switch on linear laser -VAS 6350/3- on calibration unit -VAS 6350-. –  Put on „laser protection goggles“. –  Align calibration unit -VAS 6350- so that beam from linear laser -VAS 6350/3- hits centre of logo on rear lid.

–  Check distance (left and right) between locating brackets of calibration unit -VAS 6350- and measuring paddles -1- on wheel mountings. l  Specification: 1,700 ± 2 mm Calibration procedure Please adhere to the following rules during the calibration procedure: l  There must not be any metallic reflectors (e.g. tool trolleys, metal cabinets) within 2 metres of the calibration unit. l  Vehicle doors must not be opened or closed. l  No-one must sit in vehicle. l  Do not allow any person to walk between vehicle and calibration unit for lane change assist -VAS 6350/4-.

Procedure –  Switch on calibration unit for lane change assist -VAS 6350/4- with power switch -3-. l  The green LED -1- must light up.   Note If the red LED -2- lights up: check calibration unit for lane change assist -VAS 6350/4-. –  Continue to follow the instructions on the display of the vehicle diagnostic tester.

During the program, you are prompted to move the calibration unit for lane change assist -VAS 6350/4- from the right to the left side of the calibration unit -VAS 6350-. –  Switch off calibration unit for lane change assist -VAS 6350/4- and move calibration unit to the other side. l  Voltage supply must be connected to bottom left of calibration unit for lane change assist (in direction of travel) Dimension -a- (measured between top edge of calibration unit and ground).

Setting dimension (height) in mm	Saloon up to model year 2012	Avant up to model year 2012	allroad up to model year 2012	Saloon from model year 2013 onwards	Avant from model year 2013 onwards	allroad from model year 2013 onwards
	700	700	770	765	783	823

–  Pointer at base of calibration unit for lane change assist -VAS 6350/4- must align with setting dimension on graduated scale -1- at measuring field -arrow-.

Setting dimension (left-side) in mm		Saloon up to model year 2012	Avant up to model year 2012	allroad up to model year 2012	Saloon from model year 2013 onwards	Avant from model year 2013 onwards	allroad from model year 2013 onwards
SWA 1.0		586
SWA 1.5		745	745	830
SWA 2.0					592	641	643
Read off from measuring scale -1-.

–  Switch on calibration unit for lane change assist -VAS 6350/4- with power switch -3-. l  The green LED -1- must light up. –  Continue to follow the instructions on the display of the vehicle diagnostic tester. –  After completing calibration of lane change assist, end „Calibration“, switch off ignition and unplug diagnostic connector.