Suspension Won't Reset With Replacement Struts

[jii]

I have searched for a previous thread on this but can't find one...

My Lexus had an airbag on the rear strut fail, leaving the rear on the ground. I managed to source a replacement strut second hand (another story....) but even with the strut in place the compressor won't kick in and pump the car back up.

The front of the car is at the normal level.

The compressor can be triggered manually at the relay, and the rear can be pumped up by manually stimulating the valves in the system. This rules out compressor failure.

The compressor still won't kick in despite this

The dashboard displays the 'Height High' warning at start up (it did this when the air bag failed)

even driving it (having manually filled the system with air) does not cause it to reset.

Have also tried to get the system to reset by lifting the car off the ground.

Fairly sure its not the height sensors as these have been fixed a few weeks ago, and look OK.

My question therefore is this - is there some form of fuse or reset that needs to be done to get the air suspension to register where it is, and start to pump normally again?

Help gratefully received.