If the caravan still looks tilted after levelling has finished, what could be the reason?
If the vehicle looks tilted to the eye even though the system has levelled to 0,025° precision, the first suspicion is the reference of the ASX103 tilt sensor. The sensor measures tilt relative to its own mounting plane; if it is not exactly parallel to the chassis, the system gives a result that is correct relative to its own reference but wrong relative to the vehicle. The solution is to check the sensor's fixing and perform a reference zeroing with Tare.
Possible causes and checks:
- Tare not performed or disturbed: Tare defines the system's zero reference. If the sensor has moved or the reference was not taken properly at first installation, the vehicle should be checked on flat ground with an independent spirit level and the Tare renewed.
- Sensor fixing loosened: The ASX103 may have rotated or tilted slightly with vibration. Check the screws and the surface contact.
- Ground settling: On soft ground one of the jacks may have sunk in after levelling finished. Put a plate under it and repeat the procedure.
- Interior loading: Heavy load gathered on one side inside the vehicle can compress the suspension and create a visual tilt in the body; this does not contradict the level measurement.
- Difference between body and chassis: Door and cabinet alignments do not always match the chassis plane exactly, because of manufacturing tolerances. The tilt you perceive by eye may come from there too.
The verification method is simple: put an independent spirit level on the chassis at the point you took as reference and compare it with the numerical degree value in the application. If the two agree, the problem is not in the sensor but in perception or loading. If they do not agree, the Tare must be repeated.
Full coverage of the topic: Guide to automatic RV levelling