The G Man

If teh compressor is running and the ride height is not going up, its not the sensor.

mann777

Tien your post
quote"thank you Lexus 4 ME for the information but i don't see the the local air bleeding valve. Because today i try to hit the high level switch the compressor is running but i hear the sound from the top airbag is leaking is look like valve still open does anyone have an experience like this where is the local Accumulator solenoid circuit please help "

Tien... please note this has nothing to do with the height control problem. The problem lies in the height control solenoid valve. From what I see the symtom you have mentioned that the compressor is working and there is a air leak, htat is because sometimes you have the air tube freezing, and this sometimes you may have the vehicle height not rise all the time. Possibilities are the air tube clogged, The height Control Cylinder assy itself, which is located on the inner side of the cargo compartment there is small door on the driver side , and the compressor assy is located, it is adjacent to that. There are three valves to this height control Solenoid Valve 1. Levelling Valve, Tank Solenoid Valve, Gate solenoid Valve.
All the three valves are controlled by the Suspension Control ECU. Now you mentioned the leak, technically speaking the Gate Solenoid Valve & the levelling solenoid valve is the malfunction here. There are lot of fault codes generated, I suggest you have the DTC troubleshoot what codes are stored in the ECM, then i could suggest where the fault exactly lies. Otherwise you would zillion ideas running in you head where to start from.

Artyy

Just had mine repaired... dealer told me it was a water problem.Height sensor had corrosion on contacts. Replaced the sensor. He says they are seeing alot of these.

Lexus 4 ME

I had exactly the same problem, my vehicle is originally from East Coast so due to corrosion sensors went bad. So i decided to replace two.

Zardadkhan

Rear height control is not going up