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LX 2017: Rear Climate Sync Issue

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Old Oct 23, 2024 | 04:07 PM
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TTLongIs
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Default LX 2017: Rear Climate Sync Issue

Hi All… apologies if this has been covered but didn’t see anything with a quick search.

When I have someone in the rear seat the “Auto” works and recognizes them and sets temp to match the Front.

Problem. If Front is set to 68 and back is set to same. The 68 temp in back will it will turn seat heat and heat on vs. AC (which would match front)

Is there a rear thermostat that maybe that went bad?

thanks for the help / ideas…
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Old Oct 29, 2024 | 02:35 PM
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Follow the process in this video to retrieve any error codes, then reset the codes, and then drive for a while and check again to see if any codes come back.

Sometimes you will find that weird AC issues just clear up after you do the reset:

-

Last edited by baktasht; Dec 4, 2024 at 09:38 AM.
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Old Oct 29, 2024 | 02:57 PM
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Thank you I’ll try that!
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Old Oct 29, 2024 | 03:23 PM
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I was able to get codes:

19… rear room temperature sensor

Looks like pretty basic part to switch out. Can anyone point me to where the sensor is located?
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Old Oct 29, 2024 | 03:46 PM
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Originally Posted by TTLongIs
I was able to get codes:

19… rear room temperature sensor

Looks like pretty basic part to switch out. Can anyone point me to where the sensor is located?
Before you try to swap the sensor, do the reset and drive for a day or two to see if the error comes back or if it starts working again. Sometimes a reset fixes the weirdest toyota/lexus HVAC issues.

Last edited by baktasht; Dec 4, 2024 at 09:38 AM.
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Old Oct 29, 2024 | 03:50 PM
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Will do. Thanks for the help!
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