Hello,
I do not have heat on my driver side. Run calibration on my nav system, does not gives any error code, checked passenger and drivers sides servo's and it moves. But it moves strangely, drivers side moves only from low to highest and vice versa. It moves fully but it does not move a bit if I change small temperature. But after playing with it 10mins i can hear it moving a bit when i change temp. I have managed to set my side moving up to 25 celsius and it blows warm air but not as hot as on passenger side set as 25c. I have full coolant, cleaned cabin filter and checked all servos moves. Any ideas? Seems like an electrical issue maybe there is sensor issue or any fuse somewhere located?
Googled and there were some suggestions about low freon, but not sure how it is related with heat.

Thanks!

 

Bad servo read sticky

 

https://www.clublexus.com/forums/gs-...ete-guide.html

 

In my case was that, low freon. And yesssss. I have not idea why or how is this related to the heat system. Lexus advisable to test the a/c system every 3 years and load it with new freon every three years. So, if you have not checked or loaded the a/c system with new freon for the last 3 years, it is time to do so. Check the level on your a/c system please.

 

Just checked, and refilled freon, still the same :/

 

Sorry to read that and still the same. My other option to you is check your fuses? ypur fuses are on the driver kick panel, same as the passenger side. Also, you have another fuse box on front of the battery. But, are you sure your driver servo work 100% for sure?? Because you say this; It moves fully but it does not move a bit if I change small temperature. But after playing with it 10mins i can hear it moving a bit when i change temp. The servo motor not change very quickly when you are changing the temperture just a few degree on the panel. It take a little time to start moving, BUT 10Min. for me is to much time to the servo start moving again.

 

Will check fuses and let you know, thanks!

 

No luck, all fuses are fine.

 

Well, well, well... on my post # 6, I ask you this; But, are you sure your driver servo motor work 100% for sure?? Because you say this; It moves fully but it does not move a bit if I change small temperature. But after playing with it 10mins i can hear it moving a bit when i change temp. The servo motor not change very quickly when you are changing the temperture just a few degree on the panel. It take a little time to start moving, BUT 10Min. for me is to much time to the servo start moving again. My last help that I can given to you is try a new servo motor or go to a junk yard and try to buy a use one, install it and see what happen!! That way you do that when you're not spending s lot of money. But, if you find that was the servo motor, simply put a new one or do what also I post # 3 and you can try that as well. Good luck, and let me know what do you found please.

 

Changed servo today wit my friends, still the same issue, seems that problem is inside heat unit, or electrical on navi, but temp changes normally on nav system

 

Now you confuse me more?? , . So, you have a navi unit on you car. , Well I need to say, I told you all the possibilities that could be your problem. But I never tell you about the heat unit. (Maybe it's your expansion valve) who really knows? My last recommendation for you, take your car to a good A / C shop, because I do not know what else I can say. I do not know how else I can help you, sorry.

 

Thanks for help! bought obdII cable so will check maybe it will give any errors when plug into car
Today did heater check on Navi and gave me 24 and 46 error but it is not described on diagnostic code identification chart

 

gpow,

You ask for diagnostic code and here it is;

TROUBLE SHOOTING

SELF-DIAGNOSTICS
An Electronic Control Unit (ECU) within A/C-heater control
panel monitors system circuits and stores trouble codes in memory if
problems are detected. All codes, except Codes 22 and 23, are stored
in memory. Malfunction is current if Code 22 or 23 is displayed. To
retrieve stored codes, see RETRIEVING CODES. Codes are displayed at
temperature display. See Fig. 2.
RETRIEVING CODES
1) Simultaneously press and hold AUTO and recirculated air
switches. See Fig. 2. Turn ignition on. All indicators will flash 4
times, at one-second intervals. Tone will sound when indicators flash.
2) A/C system will enter self-diagnostic mode. To end
indicator check, press and release OFF switch. Read codes at
temperature display.
3) If trouble code is displayed, proceed to appropriate
trouble shooting procedure. See DIAGNOSTIC CODE IDENTIFICATION table.
Codes are displayed in ascending order. To slow rate at which codes
are displayed, press fresh air button to change display to step
operation. Each time fresh air button is pressed, display changes by
one step.
4) If tone sounds as code is displayed, problem currently
exists. If tone does not sound as code is displayed, problem occurred
in past and does not presently exist.
Code Diagnosis
00 ................................................ Normal
11 (1) ............. In-Vehicle Temperature Sensor Circuit
12 (2) ................ Ambient Temperature Sensor Circuit
13 ................. Evaporator Temperature Sensor Circuit
14 .................... Coolant Temperature Sensor Circuit
21 (3) .............................. Solar Sensor Circuit
22 (4) .................... Compressor Lock Sensor Circuit
23 (4) ........................... Pressure Switch Circuit
31 .................. Air Mix Door Position Sensor Circuit
32 ................ Air Inlet Door Position Sensor Circuit
33 ............... Air Outlet Door Position Sensor Circuit
41 ....................... Air Mix Door Servomotor Circuit
42 ..................... Air Inlet Door Servomotor Circuit
43 .................... Air Outlet Door Servomotor Circuit
(1) - If in-vehicle temperature is -4 F (-20 C) or less,
Code 11 may set even though system is normal.
(2) - If outside air temperature is -58 F (-50 C) or less,
Code 12 may occur set though system is normal.
(3) - If testing is done in a dark area, Code 21 may set
even though system is normal. Shine a light at solar
sensor and recheck codes.
(4) - Malfunction is current. Code is not stored in memory.

ACTUATOR CHECK
1) Perform step 1) of RETRIEVING CODES. When system enters
self-diagnostic mode, press recirculated air button. Each mode door,
motor, and relay will operate at one-second intervals. Press fresh air
button to display codes one at a time, and perform step-by-step
actuator check.
2) Check airflow and temperature by hand. Tone will sound
each time display code changes. Each display code is associated with a
system operating condition. See Fig. 3 or 4. Press OFF button to
cancel actuator check mode.

Good Luck

 

Hey guys. Maybe you will know what is the issue. Today just played with temperature and found that on high temperature passenger side hot and blows strog wind but on driver side it does not blows very hard. But if i set tempertaure on low it blows hard wind and cold air on driver side but on passenger side wind is very low as it is on drivers side when tem set to high. Any thougts?

 

Hey guys thanks for answers, so my heater core was bad, because it ends on drivers side, core was cloged. so it was the mani issue, replaced it now I'm on FIRE! THANKS!