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I am writing to you as I don't find any solution to fix my Climate control (photo reminder below). I did check the forum and I found A LOT of information, but very few information on how to fix CC heater unit. (I may have miss something though..)
I did check the fuse -rear wiper- and all. I arrived to the point where I found out the blowers were working fine, only the controls are not responding.
Due to the rarity of this part, I decided to have a look inside.
I found out that the board overheated on some areas, and the SMD capacities are gone or bad looking. Literally the C2 capacity disappeared on the board below... No wonder it's not working !
I would like to change the capas, clean the board (not done yet) and see if this could be enough to fix my CC heater unit.
Here is where I need your help :
I am not an expert of electronics, especially in identification of the value of the capacitance.
I have identified 3 different values for the capas with following spec (if you think there are more than 3, please tell me) . 1/ On one of the Capa, I have the following information on the right of the black area (negative polarity marking) :
* (some rectangular drawing) 1m
* 1 0
* 16V
Diameter: 4mm x ~5mm
2/ on the right of the black area (negative polarity marking) :
(some rectangular drawing) 1 m? or L?
R22
50V
Diameter: 4mm x ~5mm
3/ on the right of the black area (negative polarity marking) :
(some rectangular drawing) 1 L? (I can't find out what the letter is, if it's a letter...)
10
50V
Diameter: 6mm x ~5mm
My guess is :
1/ should be 10µF with nominal tension of 16V
2/ should be 0.22µF with nominal tension of 50V
3/ should be 10µF with nominal tension of 50V
What is your guess ? Can someone confirm or teach me how to read these ?
Thanks in advance for your help guys,
Ben
PS: I never post on forums in general, so please be indulgent
Ben,
I cant provide an answer to your problem, unfortunately.
What were the symptoms you were experiencing? I also have a problem with my CC unit, and have not been able to find anyone in the UK who can sort it, hence now looking further afield.
Thanks
Lee
The auto climate control was only on JDM cars and only as an option on certain cars. There's not a lot of knowledge about them unfortunately, especially with regards to troubleshooting problems.
Hopefully someone with some electrical expertise can chime in on this thread!
Lee,
Thanks for your answer. Never mind, so far nobody does .
The symptoms were :
* the fan speed cannot be selected (no light, and no speed change when turning the selector)
* same behavior for the direction of the air (no light to identify in which position it is, no changes if I change through the selector)
* from time to time, the blowers would blow stronger without any changes of the driver. sometime not blowing at all...)
I found some hints on the forum thanks to threads and the JDM workshop (see above), I checked the related fuses (riya-waipa (how lovely): rear wiper and the ones in the engine bay : all goods)
I did some tests on the fans (engine bay), and somehow put the ECU in "test mode" (I guess) as I was able to hear/feel the different speeds of the blowers inside the car.
At that point, I figure out that the issue might come either from the "A/C amp" or from the "Heater control Unit" (see below).
And I then you know the status from my first post. I will order some capas and test if It could change anything...
At least, to be able to control manually the speed of the blowers and the direction, would be great ! Not expecting the auto climate to work in "auto mode" ^^'
Dale,
Thank you for your answer, yep you're right unfortunately... not enough auto climate in the market
Actually a troubleshooting method does exist in Japanese !... but even with go*gle trad I can't clearly go through it; my Japanese skills being really limited.
I can't resist to show you this one below as example (yes, I did some long evening researches in the JDM workshop)
There are plenty, but some of the troubleshooting methods are described with specific tools... that I don't own or understand. ^^'
Anyway, I will keep you posted on this topic. But please don't expect fast answers
In case anyone would be interested in this thread, I will post there how far I am with this issue.
I did a check of the "A/C amp" just in case, and as you can see below... the board is very clean.
So I exclude this part for being the issue. Clean "A/C amp" board
What I did :
I did order some Capas but I did change only 2. (10µF 16v) C2 and C4 on the board (check the first post for location)
the board was damaged for the minus leg of the capas. I had to improvise and scratch the board to find back the original copper track in order to solder.
I did a very bad work there, so you will not see that in picture (I am too ashamed of it) but at least it seems to work !
My plan was to change all the capas, but I did break the minus leg of the board while dismounting the C4.
Plus seeing my "work" make me realized I had to stop the massacre. ^^'
I went to the garage to test and... it fixed the controls !! But not the HMI :
Test condition : +APC (engine not running)
test results :
I can now change the fan speeds ! (never worked before)
I can now change the air direction ! (never worked before)
the stop button finally works ! (never worked before)
I don't have a single light for HMI feedback :
the dim lights are working fine when I switch on the lights but I don't have the indicator/feedback light for the selection (red circles below):
more generally, non of the indicator/feedback lights are working : even the auto button doesn't light but I think it works though... these lights doesn't work
So I don't know if I am in auto mode or not, only guessing...
What remains to be done :
To found a way to get the feedback lights on.. If anyone has a hint. I would greatly appreciate it
After not having the car on the road for a couple of years, and getting it back on the road this year, the CC has developed a mind of its own, switches itself on/off, changes temp, direction, and mode without human input.
Hoping to have a look at the electrics over the winter and see if I can spot any faults.
Let us know if you get the LEDs (feedback) working.
My re-circultation has never worked (for 12yrs of wonership) and the 'AUTO' was tempremental showing green on occasion when 'AUTO' mode was enabled, but that LED stopped working about 10 years ago.
The last time (~8 years ago) I took the PCBs out, I saw nothing visually wrong, gave it all a clean (contanct cleaner) and re-fitted, no change. Next time will look to try and test connectivity/resistance.
02-21-21, 02:11 PM
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