here is my schrader valve...its under the rear seat on the left side,mid picture
if you dont have one then there is a big hole there instead:roflblack:
you can check this valve for air bag pressure,engine running with you sitting on bike would be best
if you dont have a schrader,then you can drive the system with buds
OR
theoretically(i have never tried this)you should be able to disconnect your levelling rod(if your system is automatic),left side lower above the belt,and work it up and down
with engine running,the bike should raise/lower the rear as air is charged/dumped depending on the arc position of the rod
have you recently swapped out your rear shockie?
if you wound on too much preload,then the rear could be too high,and the pump wont come on because the sensor is telling the system that it dosent need any air
if so there is a proceedure in the manual,to reset the height sensor(think you need buds but not sure)
good luck with it
russ