SVX Network Forums Live Chat! SVX or Subaru Links Old Lockers Photo Post How-To Documents Message Archive SVX Shop Search |
IRC users: |
#1
|
||||
|
||||
Air Conditioning
My SVX air conditioning i.e. climate control, is playing up.
When the system switched to off, is not running and the ignition is switched on, the temperature indicator/control shows "MP", this being the last letters of the normal "TEMP" display. There is also an intermittent beeping signal. Otherwise all appears to perform as normal, including the outside temperature display. I have never seen this mentioned here and I can find nothing in the manuals which is relevant, including the section covering the self-diagnostic system. Has anyone else experienced this problem. Advice will be much appreciated.
__________________
Trevor, New Zealand. As a child, on cold mornings I gladly stood in cowpats to warm my bare feet, but I detest bull$hit! |
#2
|
||||
|
||||
Quote:
This sounds like a strange problem to be sure. None of the codes that I know pull up the word TEMP. The fact that you are only seeing ..MP might indicate the controller has developed a fault. Have you looked in the How To section Here? What manuals have you, Owner's or Workshop? I have the Australian Workshop for a '92, if there is anything you want from that, I will copy it for you. Joe
__________________
Black Betty [Bam a Lam!] '93 UK spec, still languishing Betty Jersey Girl Silver '92 UK [Channel Isles] 40K Jersey Girl @ Mersea Candy Purple Honda Blackbird Plum Dangerous White X2 RVR Mitsubishi 1800GDI. Vantastic 40,000 miles Jersey Girl |
#3
|
||||
|
||||
Thanks Joe,
I have the Australian manual just like you, courtesy of James. There is nothing relevant in the how too, or anywhere else here, which was the reason for my thread. Curly one for sure. Has anyone had experience with an audible signal in respect of climate control? Trevor, in need indeed.
__________________
Trevor, New Zealand. As a child, on cold mornings I gladly stood in cowpats to warm my bare feet, but I detest bull$hit! |
#4
|
||||
|
||||
Yes, that does sound a bit dodgy. Have you actually ran the diagnostics? If so what was the result?
__________________
'92 JDM (E) Burgandy/Black 100Km Just Crusin' |
#5
|
||||
|
||||
Quote:
No I Have not at this stage, because there is no trouble light indication. There has been a development relating to engine temperature, which is being attended to. After this is fixed, I will be very interested to see if there is any change and will report back here.
__________________
Trevor, New Zealand. As a child, on cold mornings I gladly stood in cowpats to warm my bare feet, but I detest bull$hit! |
#6
|
||||
|
||||
Engine Temp?
That is interesting Trevor.
The ECU does "talk" to the A/C controller all right. Most likely to do with the switching off of the compressor during acceleration. Six wires feed from the MPFI computer to the aircon system [Fig 35-1] They are: Brown & Black White & Black Green & White Brown Light Green & Black Yellow and Black Two of these, the Brown one and the Brown & Black one, connect directly to the Auto A/C control unit. [Fig 48-1] Did you try querying for outside temperature with ignition on, to see if the full word "TEMP" lights up? If it does not, it might indicate some diodes are burnt out in the indicator, or it might indicate a fault with the amplifier/controller. Joe
__________________
Black Betty [Bam a Lam!] '93 UK spec, still languishing Betty Jersey Girl Silver '92 UK [Channel Isles] 40K Jersey Girl @ Mersea Candy Purple Honda Blackbird Plum Dangerous White X2 RVR Mitsubishi 1800GDI. Vantastic 40,000 miles Jersey Girl |
#7
|
||||
|
||||
Quote:
Going back a ways in the threads, there is a note from Paddles to say that in Japan the temperature control often goes haywire, and the only cure is changing to another aircon computer. Well today on giving my car a run, if find my computer acting up, very similar to how yours gave problems. Symptoms like this; On switching on, the unit itself will click down the temperature scales till it reaches 18, then stays there. There is a "beep" for every half degree increment. It is almost like somebody had their finger on the blue [temperature down] button, it goes down by itself to the lowest setting. By coincidence a member in England has a similar problem. In his case the temperature goes up, though. It is responding to the temp up button, it goes up if you punch it up. However, when you take your finger away it immediately climbs back down to 18 in half degree increments. Also the problem relates to or affects the outside temp button. When I press it, at times nothing at all happens. No bleep, nothing. At other times it showed the [correct] temperature, but fleetingly. Once or twice it showed outside temp correctly, eg 10 temp, with the 10 blinking 5 times. Most of the time it does not work though. Did you find out the problem with yours, or did you have to buy another unit? Thanks Joe
__________________
Black Betty [Bam a Lam!] '93 UK spec, still languishing Betty Jersey Girl Silver '92 UK [Channel Isles] 40K Jersey Girl @ Mersea Candy Purple Honda Blackbird Plum Dangerous White X2 RVR Mitsubishi 1800GDI. Vantastic 40,000 miles Jersey Girl |
#8
|
||||
|
||||
Came right while my wife was driving the car. No clue as to why.
__________________
Trevor, New Zealand. As a child, on cold mornings I gladly stood in cowpats to warm my bare feet, but I detest bull$hit! |
#9
|
||||
|
||||
Mine's doing something similar Trevor.
It came good for 5 minutes yesterday, then lapsed back into running down the temps and holding 18. It seems to be connected to the outside temp sensor. If it works OK, the rest works OK. I'm wondering if corrosion might be a factor, or a bad earth either on the sensor or inside the unit? A strange problem for sure. Thanks. Joe
__________________
Black Betty [Bam a Lam!] '93 UK spec, still languishing Betty Jersey Girl Silver '92 UK [Channel Isles] 40K Jersey Girl @ Mersea Candy Purple Honda Blackbird Plum Dangerous White X2 RVR Mitsubishi 1800GDI. Vantastic 40,000 miles Jersey Girl |
#10
|
||||
|
||||
Recovering slowly
Aircon worked almost perfectly today. Occasionally the outside temp did not light up when pushed, but 90% of the time it did everything it is supposed to.
As the car's been lying up while I sort insurance, I'm wondering if dampness inside the cabin from condensation and humidity may not be a factor? Would dampness be getting into the computer module, and creating spurious earths for the circuit boards or something? Anyhow I ran the car for a while to heat up and dry out the cabin, using the aircon. To be honest, it's not particularly damp inside the car, but you can see condensation on the inside of the windows when cold. I just wondered if humid and cold air could be affecting the circuitry? Joe
__________________
Black Betty [Bam a Lam!] '93 UK spec, still languishing Betty Jersey Girl Silver '92 UK [Channel Isles] 40K Jersey Girl @ Mersea Candy Purple Honda Blackbird Plum Dangerous White X2 RVR Mitsubishi 1800GDI. Vantastic 40,000 miles Jersey Girl |
#11
|
||||
|
||||
Joe, this is very common for JDM models.
Although it seems to work OK for a while, it will get worse. I am not sure what the exact cause is though. I ended up replacing my unit with a new one. Subaru in Japan are well aware of the problem and the replacement units have been 'updated' by Zexcel (the maker) to overcome the problem.
__________________
paddlesnz 1993 Subaru Alcyone SVX 1980 Isuzu 117 Coupe Giugiaro Edition 1999 Mazda Astina 2006 Honda Legend 2006 Toyota Mark X Premium 2007 Toyota bB 2007 Mazda Roadster RS 2012 Peugeot 208 Allure |
#12
|
||||
|
||||
Thanks Paul.
Are you back in Japan? The funny bit is, this unit in mine is already a second-hand replacement. The last owner replaced it. It worked perfectly in England, nice and cool, did the business. I'm thinking corrosion or possible dry joints in the circuits. I wonder if anyone has ever opened one up, or if it's easy to open? Do you happen to know if the outside temp sensor not working properly is a common factor in the Japanese break-downs? Joe
__________________
Black Betty [Bam a Lam!] '93 UK spec, still languishing Betty Jersey Girl Silver '92 UK [Channel Isles] 40K Jersey Girl @ Mersea Candy Purple Honda Blackbird Plum Dangerous White X2 RVR Mitsubishi 1800GDI. Vantastic 40,000 miles Jersey Girl |
#13
|
|||
|
|||
I'm wondering if corrosion might be a factor, or a bad earth either on the sensor or inside the unit?
A strange problem for sure. Thanks. Joe[/QUOTE] Hello, Joe. Dunno' for sure, as I have one of those obviously superior US of A machines, but after my infamous Atlantic Ocean dunking a year ago; & dehumidifying the interior for a week, & still finding SOME moisture beneath a carpet six months later, & having the entire wiring harness re-soldered (front to back), let's say the car has been subjected to the equivolent of a foggy month in olde London towne. Through all this agony, the climate control system has continued to function properly. Perhaps the Isle's importers chose to include the Lucas Wiring Option to preserve its "stiff upper lip" character. Best o' luck!!! Ron.
__________________
Good s**t happened. 69 was worth the wait. '92 stock semi-pristine ebony - 160K '96 Grand Caravan - 240K '01 Miata SE - 79K '07 Chrysler Pacifica - 60k - future money pit. |
#14
|
||||
|
||||
Quote:
Quote:
I dunno either Ron, long shot. Strange enough, like Trevor's situation, it improves every day with use. It is working all the time now. That's why I suspect damp and humidity, I think perhaps Japan also suffers from weather. Another possibility is road salt on the ambient [outside] temp sensor. The Brits are buggers too for salt on the roads, English cars rust. I'll find and clean up the sensor and keep y'all posted. How've you been? have not seen you post in a while. Joe
__________________
Black Betty [Bam a Lam!] '93 UK spec, still languishing Betty Jersey Girl Silver '92 UK [Channel Isles] 40K Jersey Girl @ Mersea Candy Purple Honda Blackbird Plum Dangerous White X2 RVR Mitsubishi 1800GDI. Vantastic 40,000 miles Jersey Girl Last edited by svxistentialist; 11-28-2007 at 09:39 AM. |
|
|