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- |
|
|
|
| Setting device -VAS 6430- or setting device, basic kit -VAS
6430/1- |
| ACC reflector mirror -VAS 6430/3- |
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|
| 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 |
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 |
|
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| Continuation for both control units |
| – |
Remove dirt, if there is any, from the sensor lens. |
|
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|
| – |
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-. |
Note
| ACC setting device -VAS 6430- is not allowed to be moved on
alignment beam. |
|
|
|
| Sequence of steps for all |
| – |
Mount measurement transducers -1-
of front wheels on alignment beam. |
|
|
|
| – |
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). |
|
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|
| – |
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. |
|
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|
| – |
Position the mirror on side of the alignment beam so that
the laser beam contacts the centre of the sensor lens. |
|
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|
| – |
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 |
|
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|
| – |
Use adjusting screw -1- to
level spirit levels -2-. |
|
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|
| – |
Turn fine adjuster screw -5-
until display on wheel alignment computer is within tolerance. |
|
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|
| – |
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) |
| 01 - System capable of self-diagnosis |
| 13 - Proximity control, functions |
| Follow instructions on screen to set the control unit. |
| Designation of adjusting screws of adaptive cruise control
unit -J428- |
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|
| 3 - |
Must not be rotated - serves only as point of rotation |
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| 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. |
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