Quote:
Originally Posted by samer0214
Does the system need to be reset/recalibrated after a sensor swap? Or is this an entirely new problem?
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Yes it does need a reset.
A simple explanation is that the system operates by each sensor providing a voltage value that is read by the control module.
This voltage output varies depending on the position of the arm on the sensor which is linked to the suspension... ie as the suspension moves up or down the voltage output varies and this value is sent to the control module.
When you are 'setting' the ride height you are in effect telling the control module which 'voltage output' you prefer on each of the 4 sensors and thus what ride height you want.
To achieve the correct ride height, the control module just regulates the pumping in or out of air throughout the system to each air shock which in turn moves the suspension up or down to achieve the 'correct' values you've told it ie the ride height.
When you replace a sensor, the voltage outputs are usually different and the system doesn't know where to find the correct value or the sensor output is out of the range it can tolerate.
It then has a fit when things get out of its' range and usually shuts down (inactive) when you manipulate the suspension out of level eg when crossing a driveway access ramp / parking on sloping ground.
Do a reset and you should be good.