Checking Vehicle Height

Information 

> 430115 CALIBRATE THE LEVEL CONTROL

• Vehicles with air suspension must only be aligned and adjusted when the vehicle is set to Normal level ("Normal" level in the PCM). 
• Do not enter or exit the vehicle during and after setting the normal level for the vehicle measurement. This can give false alignment results. 
• If the control unit or one of the level sensors was replaced, level control must be calibrated beforehand. 

1. Position ready-to-drive vehicle (fully tanked with tyre repair kit or spare wheel and tools) on a flat surface or on the measuring station.
2. Only for vehicles with air suspension:  Switch to Normal Level and deactivate the level control.
   1. 2.1  Switch on ignition.
   2. 2.2  Switch to Normal Level. Select DRIVE > Chassis Height > Normal  in the PCM.
   3. 2.3  To deactivate the level control: Select CAR > CONTROL > Vehicle > Chassis > Jack mode  in the PCM.
3. Compress the vehicle at rear and front axles by about 25 mm 2-3 times and allow it to rebound freely.
4. > VAS 6918 - Quick-clamping unit  must be fitted on the wheels.
   1. 4.1  Pull off wheel trim cover with > 9229/1 - puller hook  .
   2. 4.2  Receiving surfaces for the > VAS 6918 - quick-clamping unit  on the wheels and the adapter surfaces must be clean and flat.
   3. 4.3  Quick clamping unit Position the > VAS 6918 - quick clamping unit  (with the claws first) centrally in the middle of the rim and tighten it in the rim by turning the clamping ring (clockwise).
5. Determine the actual value for the height of the vehicle body at the measuring points.

   Courtesy of PORSCHE CARS NORTH AMERICA, INC.

   Dimension = upper edge of measured-value pickup to lower edge of wing, shown as an example

   1. 5.1  When determining the height of the vehicle body, measure the height from the lower edge of the wing to the upper edge of the measured-value pickup - dimension -X-  .
   2. 5.2  To this measured dimension -X-  , add the radius of the measured-value pickup 32.5 mm  .

      Sample calculation: 

      Measured dimension X = 382 mm; measured-value pickup radius = 32.5 mm

      X + measured-value pickup radius = vehicle body height 

      382 mm + 32.5 mm = 414.5 mm

6. 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 levelling system must be calibrated.

   Required height values:

   > 4495TW ADJUSTMENT VALUES FOR SUSPENSION ALIGNMENT 

   Calibrate the level control:

   > 430115 CALIBRATE THE LEVEL CONTROL