VW Golf manuals

Volkswagen Golf Service & Repair Manual: Preparatory measures for calibration

Extensive preliminary work is required before the actual calibration can be carried out using → Vehicle diagnostic tester.
Prerequisites:
Position vehicle on a firm and level 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.
Nobody may be inside vehicle during measurement.
Opening and closing the vehicle doors during calibration must be avoided.
Special tools and workshop equipment required
   
Calibration unit -VAS 6350-
Vehicle diagnostic tester
Procedure
–  Connect vehicle diagnostic tester.
–  Switch on ignition.
 

Preparatory measures for calibration

–  Attach 3 wheel bolt adapters (spanner size 17) to each wheel centre mounting -VAS 6350/1- for the wheel securing bolts.
–  Insert measuring paddles in both wheel centre mountings -VAS 6350/1-, and secure them with clamping nut.
–  Fit wheel centre mountings -VAS 6350/1- onto wheel bolts on both rear wheels.
The turning centre of the wheel centre mounting must be in the turning centre of the wheel.
  Note
Fit wheel centre mountings -VAS 6350/1- onto the wheels so that the “anti-theft wheel bolts” are not connected to the wheel centre mountings.
–  Adjust measuring paddles with the help of the clamping nuts in such a way that they can move freely just above the floor.
The measuring paddles must not be restricted in movement.
The measuring paddles must be vertical.
 

Preparatory measures for calibration

–  Position calibration unit -VAS 6350- at distance -a- to rear wheels.
Dimension -a - = 1700 ± 2 mm
 

Preparatory measures for calibration

–  Push ON button to switch on spacing laser -VAS 6350/2-.
Indicated on display of -VAS 6350/2-:
“- - - m”
  Note
The laser is switched on at the same time.
 

Preparatory measures for calibration

–  -VAS 6350/2- Hold spacing laser -2- for distance measurement flush with stop bracket as shown in illustration.
When doing this, make sure that spacing laser -VAS 6350/2- is firmly in contact with stop bracket.
–  Ensure that the “laser beam” for distance measurement is at the bottom enlarged part on the measuring paddle -1-.
 

Preparatory measures for calibration

If this is not the case, adjust height of measuring paddles using lock nuts on wheel centre mountings -VAS 6350/1-.
–  Now, briefly press ON button to measure distance.
Indicated on display of -VAS 6350/2-:
“1.700 m” (specification: 1700 ± 2 mm).
–  Repeat the measuring process from the left stop bracket to the measuring paddle on the rear left wheel.
Measured distance value must be identical on both sides.
If both measured values are not identical, adjust calibration unit -VAS 6350- accordingly.
  Note
The vehicle shown in the illustration may differ from the actual vehicle.
 

Preparatory measures for calibration

–  Attach calibration unit for lane change assist -VAS 6350/4- on rear left on mounting of calibration unit -VAS 6350-.
If assembled correctly, the mains power lead should be fitted to the bottom left of the calibration unit (as seen facing direction of normal travel).
Dimension -a- = 606 mm (measured from upper edge of calibration unit to workshop floor).
–  The dimension is set with the measuring point -arrow- at the base of the calibration unit on the scale of the steel rule -1-.
Setting dimension left = 621 mm (read off on measuring scale -1-).
–  Connect the calibration unit for lane change assist -VAS 6350/4- to mains voltage.
 

Preparatory measures for calibration

–  Bring the calibration unit -VAS 6350- to the horizontal position with the aid of the vial (sight glass) -arrow- by turning the plastic feet.
 

Preparatory measures for calibration

–  Wear laser safety goggles.
  Note
The vehicle shown in the illustration may differ from the actual vehicle.
–  Switch on linear laser -VAS 6350/3- on calibration unit -VAS 6350-.
–  Align the whole calibration unit -VAS 6350- so that the laser beam is focused on the rear of the vehicle in the centre above the VW badge.
 

Preparatory measures for calibration

–  Check the spacing on the left and right again between the stop brackets of the calibration unit -VAS 6350- and the measuring paddles -1- on the wheel mountings.
Specification: 1700 ± 2 mm
Calibrating lane change assist control unit → Chapter.
 

Preparatory measures for calibration

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