Vehicle inclination

There can be a wide variety of causes for a vehicle inclination. The causes usually lead to an entry in the fault memory of the control unit or to a CC message in the instrument cluster.

Causes for vehicle inclination

Sensor causes

Checking of the sensor system according to instructions in the adjacent diagnosis test module.

Mechanical causes

• Sensor linkage (position, defective)
  
• Sensor holder (position)
  
• Securing clip of the sensor linkage (position)
  

Leaks as causes

• Leak in the lines
  
• Leak in the valve block
  
• Leak on the spring strut
  

Electrical causes

• Water in the connector (corroded pins): With this fault, a creeping inclination begins, as the signal slowly drifts away.
  
• Short circuit in the 2-axle air suspension system (but this is normally stored by the control unit as a fault and detected via diagnosis).
  

System-specific causes

• Opening a vehicle door during a change in the ride height (vehicle at a standstill) can cause a vehicle inclination.
  
• Rapid forces being exerted from the outside (attaching a trailer, fast loading or unloading) can prevent regulation.
  
• Tolerance bands with ignition on: +/-10 mm to height value from TIS. Note: In the case of the front axle, the mean value of both heights counts.
  
• Tolerance bands with ignition off: +15 mm/-20 mm to height value from TIS. Note: In the case of the front axle, the mean value of both heights counts.
  
• Temperature deactivation