Xantia Outside temp sensor.

paranoid · Unread post by **paranoid** » 07 May 2005, 23:22

Does anybody know anything about the outside temp sensor that I think is fitted under the mirror, Display always reads 43C give or take 1 degree either way, didn't bother me at first now it irritatating.

AndersDK · Unread post by **AndersDK** » 07 May 2005, 23:26

These out temp sensors use to go open circuit somewhere in the wiring - gauge then reading steady high.

Unread post by **Peter.N.** » 08 May 2005, 01:05

The one on the XM is in the bottom of the N/S mirror and they pack up for a pastime, out of four XMs only one had a working sensor. The XM one is the same as the C5 they are about £17:00 from Citroen. Instead of having to take the door panel off, I pulled the leads a few inches out of the mirror and soldered and sleeved the new leads, after shortening them, then poked the loose bits back in the mirror. Worked a treat.

fastandfurryous · Unread post by **fastandfurryous** » 08 May 2005, 01:14

It's the same sensor used in just about all Pug/Cit, and I believe Renault vehicles too. I paid £18 for a new one from Pug dealer, although they do turn up in scrappers every now and then. As far as I know it's basically just a thermistor in a chunk of resin, so £18 seems a bit steep to me, but that's dealer prices. Always located in the bottom of the left rear-view mirror. You should be able to see a "button" about 10mm diamater. Thats it.

Unread post by **Peter.N.** » 08 May 2005, 02:46

Usually a waste of time buying a secondhand one as they only seem to have a life of 3 or 4 years.

David Goddard · Unread post by **David Goddard** » 08 May 2005, 15:15

It's under the passenger side mirror.
It nas a separate cable and a connector just on the inside. Should be possible to connect a meter and check the resistance of the RTD. Should vary with temperature.
Price £18.71 incl VAT

xantiav6 · Unread post by **xantiav6** » 08 May 2005, 16:01

On both my Xantias (95 and 97), the sensor is/was in the RH mirror.
On my previous Xantia, the reading was always at least 20 degrees too high, or off the scale, but I measured the resistance of the sensor, and convinced myself that the display unit was faulty. Never got around to pulling the dash to fix it.

fastandfurryous · Unread post by **fastandfurryous** » 08 May 2005, 17:27

looking from the front or the back of the car?
If the display shows high then it is almost guaranteed to be the sensor. The display unit almost never fails.

paranoid · Unread post by **paranoid** » 08 May 2005, 17:47

Warmed it with the heat of a lighter and temp shot up, sprayed it with easy start and temp dropped to mid 30's
Looks like i'm down the dealer for an argument over prices (AGAIN)[B)]
Sorry getting a bit lost is it a definate door panel off job? [V]

Unread post by **Peter.N.** » 08 May 2005, 18:58

Three out of four of mine had faulty sensors, the fourth one, having replaced the sensor twice and had an argument with the Citroen parts dept, to my embarrasment, turned out to be the display!