From my LS400 2000 model american spec. car.
I want to to know what this relay used for( remarked in red).
picture is from engine room junction block.

Please help!

 

Since my 2000 LS400 does not have a "H/CNTL" relay, I assume it is for the height control feature of the electronically adjustable air suspension option -- which my car does not have.

I looked in my repair manuals and I can not find information about this relay. I did, however, find information about the HID headlight height control sensor on about page SA-20 -- I had wondered where this sensor was located.

 

my car which does not and never had neight control still had air suspension related fuses and relays.

 

Mine has the air suspension fuse but not the H-CNTL relay. Maybe they finally figured out they could omit the relay on cars w/o air suspension by the time they assembled my car -- 205th from the last LS400 made.

 

maybe ur heater control unit....just a guess

 

Kansas since your car's DRL working fine, even you dont have this relay, so i beleive i dont want to know this relay's job.

 

check your owners manual.

 

What's he supposed to check his owners manual for? My 2000 LS400 owners manual has no information about relays -- only has information about fuses. qewani1 has the same car I do.

 

thats wierd..mine does.

 

You've got a 93 LS. gewani1 and I have a 2000 LS. The content of LS owners manuals changed significantly through the years. For example, the owners manual for the gen 1 LS I had included instructions on how to change every single exterior light bulb including instructions on removing the headlight units. The 2000 LS owners manuals has no information about changing bulbs.