Tried running the air suspension calibration on my S90 but now the SUM is stuck in service mode and won't switch back to normal mode. 
at first the process seemed to be going ok but then when I went to apply a change, OrBit said the change couldn't happen because of a DTC. I cleared the codes but the suspension is still on service mode.
Took a break and attempted again and everything worked!! I was able to lower the rear air suspension by 25mm. For whatever reason, my S90's rear end was sitting abnormally high, IMHO. This adjustment seems to be holding after a short test drive. Will continue to monitor. The suspension chassis failure message went away once I started driving. Now I just need some HEICO lower springs for the front!
![[Image: 54177084869_15b4bd0ea7_h.jpg]](https://live.staticflickr.com/65535/54177084869_15b4bd0ea7_h.jpg)
Here is a before after:
![[Image: 54177084854_0ccecfcc19_h.jpg]](https://live.staticflickr.com/65535/54177084854_0ccecfcc19_h.jpg)
at first the process seemed to be going ok but then when I went to apply a change, OrBit said the change couldn't happen because of a DTC. I cleared the codes but the suspension is still on service mode.
Took a break and attempted again and everything worked!! I was able to lower the rear air suspension by 25mm. For whatever reason, my S90's rear end was sitting abnormally high, IMHO. This adjustment seems to be holding after a short test drive. Will continue to monitor. The suspension chassis failure message went away once I started driving. Now I just need some HEICO lower springs for the front!
Here is a before after: