AHC Error C1733 - Help needed (1 Viewer)

[TFMC]

Hi guys, I have a 2005 LX 470 and my AHC system only works when there is moisture or it's raining, so I'm assuming electrical\connection issues.

I plugged my diagnosis machine and it came up with code C1733 - Height control solenoid rear gate circuit.
upon looking under the vehicle I can tell someone before me tried to fix the issue (a lot of wires mended somehow), now I don't want to wast hours and hours trying to look for what wire is not connecting properly (corroded probably), not only for the time but since I live in Canada I undercoated the vehicle hence it's a mess to touch in wires.... you got the picture.

My question, does anyone know what is a height control solenoid is or looks like or even better where is located?
In addition, does anyone have a wiring diagram on this?

Any help is highly appreciated

 

[uHu]

The rear gate valve is one of the valves/solenoids in the Control Valve Assembly, which is a block sitting on the inside of the left frame rail. You see pipes connected to it and a plug with all the control wires.