Twin axle air - known good figures ?

[Paulpen]

Hi guys


Starting to chase a twin axle air suspension issue - I know that first im going to be checking for leaks and then refurbing the compressor due to code 74 (filling requested but no increase in pressure).


My question is more to get a list of know good numbers for myself and others to use to help check their system more accurately hopefully


So for a good working system does anyone know a standard working pressure reading or an acceptable limit ? Im seeing roughly 160 - 200psi through a friends scanner and no sagging over night so im curious what triggers the code.


Also what are acceptable deviation measurements before a height issue is triggered ?