13.4.2 Calibration Preparation Work

Special tools and workshop equipment required

Various preparation work procedures must be performed before the actual calibration procedure. Refer to Vehicle Diagnostic Tester.

Requirements:

Move the vehicle onto a secure flat surface.
Apply the parking brake - the vehicle must not move during the measurement.
Place the front wheels in a straight-ahead position - steering wheel neutral position.
No persons may be in the vehicle interior during the measurement.
Do not open and close the vehicle doors during calibration.

Procedure

Connect the Vehicle Diagnostic Tester.
Switch the ignition on.
Tighten three wheel bolt adapters (17 mm) for the wheel bolts on each -VAS6350/1A-.
Insert the measuring paddle on both -VAS6350/1A- and secure it with the locking nut.
Place the -VAS6350/1A- onto the wheel bolts on both rear wheels.
- The wheel center mounting rotation center must be in the wheel rotation center.
NOTE: Place the-VAS6350/1A- on the wheels so that the "anti-theft wheel bolts" are not connected with wheel center mounting.
Adjust the measuring paddles using the lock nuts so that they move freely just above the floor.
- The measuring paddles must move easily.
- The measuring paddles must be vertical.
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Position the -VAS6350A- at distance -a- to the rear wheels.
- Dimension -a- = 1700 ± 2 mm
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Switch on the -VAS6350/2A- with the ON button.

Display on the -VAS6350/2A-:

"- - - m"
NOTE: The laser is switched on at same time.

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- Hold the -VAS6350/2- -2- flush against the catch bracket, as shown, for the distance measurement.
The -VAS6350/2A- must lie firmly against the catch bracket.
- Make sure the "laser beam" for the distance measurement contacts the lower enlarged part of the measuring paddle -1-.
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If that is not the case, correct the measuring paddle height using the locking nuts on the -VAS6350/1A-.

Display on the -VAS6350/2A-:

"1, 700 m" (specified value: 1700 ± 2 mm).
- Repeat the measurement procedure from the left catch bracket to the measuring paddle on left rear wheel.
The distance value must be the same on both sides.

If both measured values are not the same, adjust the -VAS6350A-accordingly.

NOTE: The vehicle in the illustration is only a basic outline.

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Secure the -VAS6350/4- to the -VAS6350A- mount on the rear left.
- When installed correctly, the vehicle electrical system voltage wire must be connected at the bottom left of the calibration device (as seen in direction of travel).
- Sedan dimension -a- = 636 mm (measured from the upper edge of the calibration device to workshop floor).
- Wagon dimension -a- = 628 mm (measured from the upper edge of the calibration device to workshop floor).
The adjustment dimension is set with the test probe -arrow- on the base of the calibration device on the scale of the steel ruler -1-.
- Left adjustment dimension for Sedan = 618 mm (read on measuring scale -1-).
- Left adjustment dimension for Wagon = 713 mm (read on measuring scale -1-).
Connect the -VAS6350/4- to the vehicle electrical system voltage.
Using the bubble level (level indicator) -arrow-, bring the - VAS6350A- into a horizontal position by turning the plastic bases.
Wear laser protective eyewear.

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NOTE: The vehicle in the illustration is only a basic outline.
Turn on the -VAS6350/3A- on the -VAS6350A-.
Align the entire -VAS6350A- so that the laser beam shines on the center of the vehicle rear above the VW logo.
Check the distance on the left and right sides between the catch brackets of the -VAS6350A- and the measuring paddles -1- on wheel mountings again.
- Specified value: 1700 ± 2 mm

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