VW Golf manuals

Volkswagen Golf Service & Repair Manual: Adaptive cruise control

Calibrating adaptive cruise control (ACC), except for e-Golf

 
Before adjustment of the Adaptive Cruise Control (ACC) system, the sensor, the retainers and securing elements are to be checked for damage, external influence and secure seating. Any damaged parts are to be repaired.
Before adjustment of the Adaptive Cruise Control (ACC) system, the event memory must be read out and faults, if any, rectified.
The “measured misalignment-angle value” of the ACC control unit will indicate whether or not the sensor is out of adjustment.
It is only permissible to adjust the Adaptive Cruise Control (ACC) system with a wheel alignment machine and adjusting devices approved by VW/AUDI.
Correct adjustment is an essential prerequisite for perfect functioning of the Adaptive Cruise Control (ACC) system.
  Note
Re-adjustment is required:
Rear axle toe setting has been adjusted.
The adaptive cruise control unit -J428- has been removed and reinstalled,
The front bumper support has been removed and installed.
The front bumper support has become loose or has been moved.
The misalignment angle is greater than –0.8° to +0.8°.
The vehicle has been brought into the service position.
Special tools and workshop equipment required
   
Setting tool -VAS 6190/2-
 

Calibrating adaptive cruise control (ACC), except for e-Golf

Setting device -VAS 6430- or setting device, basic kit -VAS 6430/1-
ACC reflector mirror -VAS 6430/3-
Wheel alignment computer
 

Calibrating adaptive cruise control (ACC), except for e-Golf

A new generation of adaptive cruise control units has been introduced. In regard to calibration, they differ only in appearance. Otherwise, the procedure is the same.
I. -  Previous control unit
II. -  New control unit
  Note
Before driving vehicle onto wheel alignment platform, make sure there is sufficient space between vehicle and setting device -VAS 6430-. The distance between setting device -VAS 6430/3- and the sensor must be 120 cm ± 2.5 cm.
If available space is not adequate, move vehicle backwards onto alignment platform as required to achieve space required.
If position of ACC reflector mirror -VAS 6430/3- on alignment beam is changed, setting of ACC setting device -VAS 6430- must always be checked (e.g. spirit levels, individual toe values on adjusting beam, etc.).
Before starting adjustment, read out event memory and rectify any faults.
Adjustment procedure described here is based on setting device -VAS 6430-.
The following setting sequence is to be adhered to:
1 -  Establish a distance of 120 cm ± 2.5 cm between the ACC reflective mirror -VAS 6430/3- fitted in the middle and the sensor in the radiator grille.
2 -  Install ACC reflector mirror -VAS 6430/3- centred on alignment beam.
3 -  Adjust adaptive cruise control unit -J428-.
If wheel alignment has just been carried out, the steps described under “Setting without preceding wheel alignment” do not have to be carried out.
Setting without preceding wheel alignment
–  Press button to select ACC calibration in wheel alignment computer.
–  Note testing preconditions for wheel alignment → Chapter.
–  Drive car onto wheel alignment platform.
–  Connect battery charger → Vehicle electrics; Rep. gr.27.
–  Connect → Vehicle diagnostic tester. (Route diagnostic cable through open window.)
  Note
During the setting procedure, make sure that all the car doors remain closed and that the car's exterior lighting is switched off.
–  Move front wheels to straight-ahead position.
–  Mount quick-release clamps on rear wheels.
–  Mount measurement transducers on rear wheels.
–  Carry out wheel run-out compensation at rear wheels.
Setting with or without preceding wheel alignment
Previous control unit
 

Calibrating adaptive cruise control (ACC), except for e-Golf

–  Remove trim -1-.
New control unit
 

Calibrating adaptive cruise control (ACC), except for e-Golf

–  Remove trim -1-.
–  Remove trim -1-.
Continuation for both control units
–  Remove dirt, if there is any, from the sensor lens.
 

Calibrating adaptive cruise control (ACC), except for e-Golf

–  Position ACC setting device -VAS 6430/3- centrally and parallel at a distance -a- from centrally fitted ACC reflector mirror -VAS 6430/3- to adaptive cruise control unit -J428-.
a -  120 cm ± 2.5 cm
  Note
ACC setting device -VAS 6430- is not allowed to be moved on alignment beam.
 

Calibrating adaptive cruise control (ACC), except for e-Golf

Sequence of steps for all
–  Mount measurement transducers -1- of front wheels on alignment beam.
 

Calibrating adaptive cruise control (ACC), except for e-Golf

–  In the area -A-, move position -2- on rotary knob so that it coincides with marking on mirror (the number 2 on the rotary knob must point towards the vehicle).
 

Calibrating adaptive cruise control (ACC), except for e-Golf

–  Use adjusting screws -1-, -2- and -3- to bring spirit levels -A- and -B- to - VAS 6430/3- horizontal.
–  Adjust mirror -4- by means of crank handle -arrow- in such a way that the laser beam contacts the centre of the sensor lens.
Previous control unit
 

Calibrating adaptive cruise control (ACC), except for e-Golf

–  Position the mirror on side of the alignment beam so that the laser beam contacts the centre of the sensor lens.
New control unit
 

Calibrating adaptive cruise control (ACC), except for e-Golf

–  Position the mirror on side of the alignment beam so that the laser beam contacts the centre of the sensor lens.
Continuation for both control units
 

Calibrating adaptive cruise control (ACC), except for e-Golf

–  Use adjusting screw -1- to level spirit levels -2-.
 

Calibrating adaptive cruise control (ACC), except for e-Golf

–  Turn fine adjuster screw -5- until display on wheel alignment computer is within tolerance.
 

Calibrating adaptive cruise control (ACC), except for e-Golf

–  Use adjusting screw -1- to level spirit levels -2-.
–  Now, use laser beam -3- of -VAS 6430/3- to check again whether spirit levels are horizontal and laser beam hits centre of sensor lens.
  Note
The alignment of - VAS 6430/3- must be repeated if the laser beam does not coincide with the sensor lens.
–  Press → Vehicle diagnostic testerGoTo button and select Select function/component function.
Selection on → Vehicle diagnostic tester for setting adaptive cruise control unit -J428-:
–  On the screen, click the following buttons one after the other:
Running gear (Rep. Gr. 01; 40 - 49)
13 - Proximity control
01 - System capable of self-diagnosis
13 - Proximity control
13 - Proximity control, functions
13 - Calibration
Follow instructions on screen to set the control unit.
Designation of adjusting screws of adaptive cruise control unit -J428-
 

Calibrating adaptive cruise control (ACC), except for e-Golf

Previous control unit
1 -  Setting screw 1
2 -  Setting screw 2
3 -  Must not be rotated - serves only as point of rotation
 

Calibrating adaptive cruise control (ACC), except for e-Golf

New control unit
1 -  Setting screw 1
2 -  Setting screw 2
3 -  Must not be rotated - serves only as point of rotation
Continuation for both control units
  WARNING
The ACC setting is not accepted until “Final control diagnosis is completed” is displayed in the → Vehicle diagnostic tester.
 

Calibrating adaptive cruise control (ACC), except for e-Golf

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