I'm bringing this one up again, and I apologize. I know that information on this issue is all over the web, but none of the instructions seem to match my setup.
We just returned from Colorado with my wife's 2014 Edge Limited with Sync Touch and the Sony sound system controls with dual climate control. and noticed while we were there that the heat does not work. I will provide as many symptoms as I can...
There is no clicking noise when working the climate control. I don't think it's an actuator gear, but I could be wrong.
I've examined every vent, and all results are the same. That includes the passenger and driver side vents. The defrosters in both the dash and the doors. The floor vents, and the rear-seat vents. The same levels of air flow and temperature emit from all.
That makes me think it's not a temp door or actuator, unless there's a master diverter that controls air going to the system as a whole before being split by other actuators into the different doors/zones.
Is there a central diverter prior to air being split into different zones?
The air flow itself seems to be fine. It's never been hurricane force, but it seems to be operating at the same level as when the vehicle was new.
There is NO heat. Set heat to max and it remains at the outside ambient temp. Turn the air conditioning on, and things get cold -- to the point where it seems like LO is selected as a temp. Using the dual control in an attempt to detect a difference between passenger and driver sides yields no results. I set driver to LO and passenger to HI with the air on, and both temps were coming out at the same level of very cold. The rear-seat vents carried this same temp.
I can select all of the different vent positions with no problems. Defrost, face, floor, mix... that all cycles through just fine.
I would like to make use of the EATC diagnostic, but here's the problem. I have the Synch Touch system and the Sony controls. Very few buttons to play with, just the touch-sensitive indicators and the central knob for the sound system. I'll call all of these buttons from this point on to make things easier, but they're still just touch-sensitive locations.
From all of the instructions I've found -- I have no 'floor' button to press. I seem to have no 'mode' button, unless it's marked differently than I'm expecting. I've tried hitting power+defrost, followed by Auto within two seconds. No results. I've also tried the other combinations that make use of the A/C button and I've tried these combinations with the Sync screen in addition to the Sony controls.
So far, no luck getting into diagnostics.
I've gotten into the Sync diagnostics through the Eject+Right Arrow combination, but there seems to be no HVAC/EATC option in that menu. If there is, and I've missed it, please let me know.
I've gotten the vehicle into Engineering mode, but again there seems to be no EATC options available, unless I've missed them. Which is a shame -- I'd really like to see the vehicle run the climate control system through a full series of tests. Engineering mode showed no DTCs.
The engine does not seem to be overheating. Hot coolant is flowing to the radiator. The temp gauge stays stable at just under the half-way point. While I know that this reading can be misleading if there's no coolant flowing, the engine itself did fine on today's 10 hour drive. Physical inspection of the engine itself did not indicate overheating. It was warm/hot, but not enough to scald as long as I stayed away from the exhaust.
Yeah, that's a lot to read, but I know the questions that get asked with this problem, so I wanted the bases covered up front.
IS there a way to get into the EATC diagnostics with the setup pictured?
That's the 2013 version, but 2014 only seems to have some cosmetic differences. All of the controls are in the same place with the same markings.
I've narrowed the issue down to the following: clogged heater core, bad thermostat, bad 'primary diverter' (one central door or valve which would direct warm airflow to the Dual Climate Control doors), if such a thing even exists.
Further advice would be appreciated. I'll break that down into the TL;DR version:
1. Does the 2014 Edge Limited with Sync Touch and the Sony controls have an EATC diagnostic mode?
2. How do I access this mode?
3. What is the most likely scenario give the above information - all vents (L/R, defrost, floor, and rear seat), at all times work fine except for not having any heat. Same cold temp emitting from all vents regardless of dual climate settings.
4. Is there a fuse that I should be checking? If so, which one and where can I find it?
5. Just over 20,000 miles on the vehicle. We have not replaced the cabin air filter, but plan to for this. Since there's no reduction in air volume, I doubt that's the problem, but what the heck.
The vehicle is past the 3 year warranty period, but I can check with the dealer to see if we have anything left on it if this is something serious. I'd still like to be armed with information before I go in, however. I should be able to replace a thermostat on my own, unless that process has gotten idiotically complicated in the 30 years since I've last performed the operation. That's back when they were made out of cardboard and died frequently on Fiestas.
I plan on picking up a Scangauge II for an unrelated Tacoma project, but I could also use it to pull DTCs which might not be tripping the CEL or showing in Engineering Mode. If someone has a better idea for a scanner, I'd love to hear about it. SGII seems to be a bit dated. Does anyone have any experience with the Bluetooth units that communicate through smartphones?
That's all I have, and lord it should be enough. Questions will be answered if I've left anything out. Any help would be appreciated. I'd call my dealer at this point, but they'd insist on waiting a week for an appointment, another week for diagnosis, three more to get parts in, and then who-knows-when for the repair, which is almost certainly just out of warranty.
Thank you. That's a lot to read, but again I wanted to cover as much information as possible.
