RE: "Outside Temp" adjustable?

[Aleksander Mierzwa <alex@matrix.com.pl>]

There's huge difference between output from the outside temp sensors
(channels 4 and 5). I think the one at the evaporator (channel 4) reads
too low. That's why the computer shuts off the compressor because of
temperature (value in channel 17 confirms that). Try disonnecting the
sensor at the evaporator. The AC head should then report error 03
("outside temp sensor on evaporator open circuit") and use the on behind
the grille only. 

Aleksander Mierzwa
Warsaw, Poland
mailto:alex@matrix.com.pl
87 Audi 5000CS turbo (mine)
88 Renault Medallion wagon (mom's)
91 mountain bike (just in case both cars broke at the same time :-)

> -----Original Message-----
> From:	Gerard [SMTP:gerard@poboxes.com]
> Sent:	Wednesday, November 19, 1997 7:30 AM
> To:	quattro@coimbra.ans.net
> Subject:	Re: "Outside Temp" adjustable?
> 
> Ok. I've had a look at the diagnostic memory within the head unit of
> the climate control. I am going to list the data readings here by
> channel. I am also going to list the ambient conditions and the
> engine conditions. If anybody is more up to scratch with climate
> control then could you perhaps look at this stuff and see what is
> going on and perhaps figure out what I need to check/fix?
> 
> Here is the ambient conditions:
> 
> 	Real outside temperature: 23 celcius
> 
> Here is the vehicle conditions:
> 
> 	Location of car         : carport, no wind interference
> 	Engine bay temperature  : 87 celcius (on temp gauge)
> 
> I let the aircon run for a while, no cooling effect. Then idled
> the car, set the head unit into diagnostic mode and checked the
> channels:
> 
> 	Channel		Reading
> 	-------		-------
> 	1		09	 (car is 1990 model, very late 89 200T)
> 	2		120
> 	3		105
> 	4		57
> 	5		142
> 	6		255	 (nothing attached I assume, but how to
> 				  check?)
> 	7		   _	 (segments on for: rad fan 1st speed,
> 			|  _      air recirc door open,heater valve
> 			   _|     closed, centre vents 1/2 open, floor
> 			          vents open)
> 	8		222
> 	9		248
> 	10		48
> 	11		13
> 	12		0
> 	13		not used
> 	14		0
> 	15		12.4
> 	16		not used
> 	17		segment on for Temp./mode shut-off conditions
> 	18		none
> 	19		0
> 	20		0
> 	21		not used
> 	22		not used
> [...] 
>