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I'm a brand new member here on the site and I'm looking for some insight from any of you veterans that may have had an issue similar to mine. I've had my 2010 GS for almost 3 years now and I've just recently run into an issue with my climate control. I've scoured the forums prior to making this post in search of a similar issue, but I have not found anything that describes what I'm seeing here.
My climate control unit will sometimes not work at all. Does not illuminate, no response from the buttons. When it does decide to illuminate, I have full control and normal response. All fans and heat/AC controls work completely normally. In conjunction with this, my gear selector (auto) light will also be out when the issue arises. So the power to either of them is intermittent, but functionality is unscathed. There is no flickering of the unit, its either fully operational or not at all.
As you can see in your 2010 wiring diagram the shift lever light is tied into the HVAC module so your best bet is to remove the electrical connectors off the back of the HVAC Module and look for any damaged or loose pins or any “green crusties” or its correct technical term…verdigris…you may be intermittently losing power or ground to the module…maybe a shot of electrical contact cleaner is all that is needed....any of the other lighting at the bottom of the diagram inop which are tied in to the circuit ??
What C5 DIAG said. I see that a lot up here in Wisconsin, pins not seated correctly seldom compared to the corrosion. Dielectric grease is your friend. If you see the wires or connectors burnt up, you will want to find the reason. Good luck, electrical diagnostics can be a bitch.
What C5 DIAG said. I see that a lot up here in Wisconsin, pins not seated correctly seldom compared to the corrosion. Dielectric grease is your friend. If you see the wires or connectors burnt up, you will want to find the reason. Good luck, electrical diagnostics can be a bitch.
Dielectric grease which is an insulator can be harmful in some electrical circuits such as low current circuits such as airbag circuits which see very low resistances and a 1 ohm increase can cause issues.
Dielectric grease which is an insulator can be harmful in some electrical circuits such as low current circuits such as airbag circuits which see very low resistances and a 1 ohm increase can cause issues.
That I did not know. I work in the transportation refrigeration industry (I manage a Carrier dealership). We have a lot less electrical harnesses and connections than the average car, and I'm not sure about the range of resistances but we have always been trained to use dielectric grease on ALL pins and connectors.
If you are going to use it a good application would be on both shells of an electrical connector where they slide together which may keep water and moisture out…if used on pins and terminals this stuff below is the best out there and improves the conductivity of the pins and terminals…it’s expensive but worth it…$62.95 on Amazon for the little 15ml bottle…they also make conductive grease also…been to many electrical classes over the years and this is what everyone swears by !!
Very interesting. I also have a 2010 GS with the same issue. Previous posts indicate the problem may be cracked solder on the ribbon connector. Also, not very good reports on repair shops. I bought a used one out of a 12 GS for a backup. My problem hasn't been that bad so far. Usually a couple of time per summer.
Thank you for the replies everyone! I appreciate all the insight. I'm not worried about the troubleshooting, but more interested in how everything is laid out so I have a good picture of what I'm dealing with. I have a long history of component level PCB troubleshooting and repair.
C5 Diag, would you mind letting me know where you found that diagram? I'd really like to take a closer look at it.
Thank you for the replies everyone! I appreciate all the insight. I'm not worried about the troubleshooting, but more interested in how everything is laid out so I have a good picture of what I'm dealing with. I have a long history of component level PCB troubleshooting and repair.
C5 Diag, would you mind letting me know where you found that diagram? I'd really like to take a closer look at it.
Thank you!
This is from Alldata DIY and you can get a 1 month subscription for $19.99 or a 2 or 3 year one…this is the color non OEM diagram which is a little easier to interpret and you can also highlight one circuit to follow it if it’s 3 or 4 pages long…it doesn’t show the connectors however…the OEM black and white diagrams do show the different connectors, splices etc… so you have a choice…you should some time navigating the site as their is much info to be gathered.
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Climate Control Unit Issues
