Hello,

I have a question about the climate control.

I have a FD3s Touring that has climate control. I found that there are in europe only a few FD's with climate control in it.
I contacted other RX company's but they all said: no there are no FD's with climate control....
Well mine has it for sure
Maybe there are more in the usa?

My climate control doesnt work. Also no airco, blower etc. Nothing on the midth panel works.
Lets start at the beginning:

When i bougt my FD everything worked good.
After a while it didnt work anymore. Somethimes after a few stops on the route and after restarting at that moment.
But now it stoped working at all.

No climate no airco no speed source and no blower. Nothing works on the pannel. A few lights when i turn on the lights.
No blower is the worst case because iff its gone rain have a problem because my windows became steamy.

My dealer is an RX specialst but they had never had an FD with climate control so its new for them.

They checked all the fuses and they where ok.
We thougt there was maybe a plug not connected. But everything was in place.
We got the hole pannel out and we came to the conclusion that one off the Circuit Boards had a weak prossesor. Becauce when we rubt on it with my finger everything worked. But after a restart we had to repeat the proces.

Here is a picture off the printboard/ circuit board. And the arrows are on the proccesor/IC that we had to rub.




A colleague off mine said he could repair it and did a nice job but it still didn't work.

So i orderd a second hand unit from the United kingdom. The only place where i could find the unit.



He sad it worked when he pulled it out off the car.
But in mine it also didn't work....

We measured on the circuit board and there is power on it. But still nothing works.

Does anyone has a idea off what it could be? Or is it a common problem with the climate control?

We also looked for swapping it with the normal airco unit but we came to the conclusion that the wires in the dashboard are different......

Can anybody help me please?

Sorry if i made some spelling mistakes. I am from Holland. '


Thanks for reading.

 

Hi Dutch FD,
Did you ever get this problem sorted, I have exactly the same problems and I cannot find a replacement unit anywhere.

 

I bought a good working replacement but that one didnt work either.....
We think the problem is somewhere else. But we cant find it....
So after the winter i am gonna transfer it to normal airco unit. To bad i think but it has to work. And i searched a lot on the climate control and saw there were many problems with it.
It not an easy job to replace it with normal airco unit. The wiring in the dash is also different so the hole dash is gonna come out.

But as i sayd it has to work because if i drive in the rain i have nog air blowing....

 

Thanks for your reply, I have had a little luck! I removed the PCB and xactly as you indicated the processor had very corroded terminals, I managed to clean them and resolder all of the joints, at first it appeared that it had not worked, but then it came back in to life and all apears to be working,
It still has one problem, the fan and temperature stay at the last used setting and will not adjust unless you operate the fan with the ignition on before starting the engine, then all works well, although the leds still do not work. I think the fault is in the Auto/Off selector switch circuit.
But hey I'm back on the road!!!

 

A little late, but to answer your question,

None of the FD's sold in the USDM market came with climate control. Unfortunately there are not many people who have that system as most members here are in the US.

 

did you ever get the climate control swap done? my fd has the same style unit as these pictures (J-spec) but even all the climate control units I can find in Japan are the non-auto version with the different dials. the harness actually hooks up to 2 out of 3 of the control jacks but all it does is turn on the hazard lights and none of the controls work. did you actually swap out the a/c harness?

 

Yes we changed the hole climate control to the normal airco unit.
At least my dealer did it

they had a J spec FD for breaking so we took the dash loom out of it and replaced it on my car.
Because the normal airco control unit(dash controls) wont fit on a dash loom of the climate control.
So the dash had to come out. The heater unit was the same a i remember correctly.

It's a lot work but it was nessesary to let it work.

 

Well dont be disappointed by the fact there are not so many.
The system fails very often as i learned by searching. The normal airco unit almost never fails.
And parts are very rare for the climate control.
It was nice when i got it because its rare, but when it stopped working it was a B#tch

 

yes i have the climate control unit and i looked on yahoo auctions japan and all they have is normal airco unit, so the climate control unit is very rare in japan but for some reason it is what my car has. it works but i want to change to the normal unit because it is smaller and seems more reliable. too bad i would have to swap the entire harness out i wonder if there is a way to do it with the dash intact. thanks for the info

 

Hi All,

I'm glad that I found this thread. I've had this problem for some time now - over a year - and rarely drive the FD because of it - which is a real shame.
The first sign of the problem was when I lost complete control from the Climate control panel - it was stuck on a setting I did not mind (blower/Aircon both working).
Then, one day put the ignition on in the FD and it was all dead like Dutch-Fd describes "No climate, no airco and no blower, no lights and nothing works on the panel".

Did the same tests as you guys - all components work, all relays and fuses OK. The circuit boards (both in the AC Module (F102) and Panel controls (9664F)) have both been tested - but I have been unable to find a circuit diagram for the climate control.
Anyone know where I could get the circuit diagram?

Since both Dutch-FD and Norcom pointed to the same IC/Processor - I went down to have alook at mines. It is a toshiba product with TMP47C660F P234 written on it. Did a search and found this: TMP47C660F (Toshiba) - CMOS 4-BIT MICROCONTROLLER, Microcontrollers

Although it is written in perfect english, it is too technical for me. It is a CMOS 4-bit Microcontroller, and show all the pin-outs, etc and 59 pages of details. If someone with more knowledge in these things can have a look and tell me what I should be testing (I could use a tester - I can match the pin-outs on diagram to physical IC, but I don't know what I should be reading at each pin-out). For starters, I will check that +5v is going into VDD (pin 58) and that VSS (Pin 26) is ground.

Happy for positive suggestions, comments and ideas. Would really like to find a solution for this problem.

ps: Dutch-FD can you PM me if you still have any of the parts left from your conversion. really interested in both circuit boards for further testing.

rgds
Lesmon

 

so youre telling me you cant find a used unit to swap out in the UK either? if this version of the unit is so rare then why are we the only people who have it? I have a 92 FD3S was it only made on a limited number of them? I see used units for sale but all of them do not have "automatic" and have different *****

 

I believe all the "touring" models have climate control.
As so they had the most "gadgets"on it.

Climate control/sunroof/ cruise control/ leather interior etc.

I actual bought a replacement unit for the climate controls in the UK. But it was the only set he got and was very Rare he said. And he has sold allot of parts in the years.


I sended you a pm Lesmon.

 

I'm surprised no one has solved this ? It's happened on two of my FDs and I've just had to leave it. Just wired the fan to on full on and off ... No other solution .

 

Have you checked Aus-based FDRX7.com for a solution?

 

I had no idea FDs were ever sold with automatic climate control! I've never encountered one in all my years of looking at RX7 pictures online!

If it works after you run your fingers over it, it sounds like there are weak connections or weak soldering. The solution, in that case, would be to have someone who is experienced with soldering, reflow and check the soldering points in that general area. I've heard from some people that stores that do VCR repairs, are good for this kind of repair. Without a diagram or factory information, troubleshooting will be difficult, as it'll be tough to identify the failure points without knowing what goes where.

Do you know if it's possible to go to manual controls?

 

Neither have I! Could you please get a picture of it reassembled and in the car? This is definitely worthy of being archived