My 1998 LS400 was totaled less than a week ago. Now I'm looking to buy an LS430. I noticed during my test drive, a master warning light, for the headlight leveling. What exactly does this mean? I read your quote. However, I need more clarification. I don't want to buy a car with problems. If so, I may need to rebut the seller's offering price.
The HEADLIGHT LEVELING warning light .... As it turns out, the shop removed my height sensors (one at each wheel in the UL), so I cannot adjust the sensors to get the warning light to go out. So (until I get the sensors reinstalled) I have pulled the fuse (located in the box in the passenger side kick panel) for the sensors (#28 in the owner's manual). The warning light is gone but the functionality of the headlight leveling is gone too (for those rare occasions when it might make a difference due loading of passengers and / or luggage).
While I wait for the headlight / height sensors to be re-installed, I manually adjusted the headlights with a 10mm socket wrench. Before the suspension change I had marked the wall in my garage at the center of the beam height. After the change there was a difference of about 4" in the beam height to the wall about 10 feet away. I loosened and set aside the fuse box behind the driver's side headlight and removed the plastic panel behind the passenger side headlight. There is an opening in the plastic housing at the back of the headlight for the socket to fit onto the adjustment nut (the nut is not visible - but the hole is). I turned the nut clockwise until the height came up to the air bag suspension height. It was amazingly simple and easy!
Now the UL has headlights like the "good old days". The motors are not active but the beams are properly aimed and the warning lights are off.