Checking Vehicle Height
WARNING: This page is about a different variant/trim than selected.
Information
- Only measure and adjust vehicles with air suspension in the Normal Level vehicle setting with narrow control tolerances.
- Do not get into or out of the vehicle while or after setting the suspension measurement level. This can give false alignment results.
- If the control unit or one of the level sensors was replaced, level control must be calibrated beforehand.
- Only for vehicles with air suspension:
Switch to Normal Level with narrow control tolerances and deactivate level control.
- 1.1 PIWIS Tester can now be connected.
- 1.2 Switch on the ignition and start Diagnosis.
- 1.3 Switch to Normal Level with narrow control tolerances menu item: → PASM/Measurement → Maintenance/repairs → Switch to Normal Level with narrow control tolerances .
- 1.4 Deactivate the level control .
- Compress the vehicle by about 25 mm at the front and rear axles 2-3 times and allow it to spring back freely.
- Determine the actual value for the height of the vehicle body at the measuring points.
Dimension X = upper edge of quick-clamping unit to lower edge of wing (shown as an example)
- 3.1 When determining the height of the vehicle body, measure the height from the lower edge of the wing to the upper edge of the quick-clamping unit, dimension -X- .
- 3.2 Add the radius of the quick-clamping unit -X- 32.5 mm
to this measured dimension.
Example calculation for rear axle:
Measured star gauge X= 386.5 mm (15.2 in.); radius quick clamping unit = 32.5 mm (1.27 in.)
X + radius of quick-clamping unit = vehicle body height
386.5 mm (15.2 in.) + 32.5 mm (1.27 in.) = 419 mm (16.5 in.)
- Only for vehicles with air suspension:
As soon as at least one of the measured height values does not correspond to the required height values, the level control must be calibrated.
Required height values:
> 4495TW ADJUSTMENT VALUES FOR VEHICLE ALIGNMENT
Calibrate the level control: