I have a 1998 LS 400 and have recently lost all of my climate controls.
I shut off my car one evening and came out the next morning the battery was dead, after putting a full charge on my battery everything was working fine except my climate controls.
The car starts, runs, drives, radio, everything else works just no climate controls.
Where is the Climate control module located?
Can it be fixed and how/who can fix it?

 

have you checked all your fuses? start with the one inside, behind the driver's kick panel.
also, do you have factory navigation?

 

I have checked all fuses under the hood and under the drivers side console all are good!

this is my LCD display for my Climate control

Same LCD for MENU

Same LCD for Navigation

Same LCD for Radio Stations

 

Yes I think it has Factory NAV.

 

I think the climate control unit indicated by a red arrow is dead. I'm a guy who enjoys fixing electronics units for free but without analyzing the unit myself, I have no idea what component is needed to replace.


Incidentally, this photo is picked up from here. .

 

Good Morning! I thank you for responding. I am interested in finding out how to fix this problem. Can you pls tell me where the climate controls are located? Are they in the center console area? I am also having a problem with the LCD screen only coming on/working intermittently. I was lucky to get these pictures. Also, Is the LCD screen controller in the same area?

 

I suggest you to check this page and you will know more. The poster is mentioning about the replacement of the LCD's panel.

 

Good Morning, thank you! Yamae, I have visited the suggested site. It was somewhat informative, but I am still interested in trying to get the climate controls repaired.
I have some/little experience in working on circuitry. Any sugestions on getting it repaired?

 

As I have mentioned you, I have no idea to find out the failed part of the unit without analyzing it myself. Anyway at first, I'd start to check the current of the 7.5A fuse for A/C and find out which circuit is drawing the current which empties the battery. The fuse line is connected to the pin #1 of the connector Q. This line is connected to the A/C processors and it drives 5 motors and 1 solenoid using drivers. I imagine 1 or more of these are drawing the current.

 

Thank You! It will be several days before I can start Trouble Shooting but I will keep updated.

 

So this happened after the battery went dead but was working perfectly ok before. This may or may not be relevant but worth me mentioning that on my 98 LS400 when the battery has been disconnected and then reconnected, the AC does some checks and defaults to 'off' - no lights on the AC buttons - pressing the 'Auto' button turns it all on again and all good again. I have never checked if the touch controls still work or not after disconnecting the battery and the AC can be turned on from there.

 

Thank You! I will give that a try when I put it back together.

 

Thank You!
NO! That did not reset the controls! I think the climate controls are located behind the Touchscreen. I will try to pull that apart this weekend.