aircon bodge

Post your Cit/Peu/Ren air conditioning queries or advice.

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dnsey
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Post by dnsey » 10 Jun 2007, 16:38

If it's a stepper motor (which seems likely, as it could then be set by the controller to a pre-determined position) , there's no simple way of wiring an external supply to it :-(
Your description seems very much to be pointin to a faulty controller board.
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Post by weety » 16 Jun 2007, 20:18

Clogzz wrote:Just went over the whole topic and back to the French site where the pictures came from.
Since you have air blowing at whatever temperature it feels like, it indicates that the flap is moving, and with the metal connector not broken, it means that the drive mechanism operates the flap.
That would put the motor and drive assembly out of contention.

The French site writes about faulty climate control ECU’s, replaced by a modified version, part Nº PR6461 G6.
That lives high up towards the centre, behind the glove box.
Cars of a more recent vintage than yours will have the modified ECU.
With a bit of luck, the wreckers won’t know the value of that, and let go cheaply.
Back tomorrow.

Image


ok i have finally had a chance to have another go at the car......took the glovebox out and there isnt a aircon ecu behind it....there are no wiring looms heading of in that direction either (other than the one to the fans)....is it likely to be behind the centre console?

puzzled again :?

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Clogzz
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Post by Clogzz » 17 Jun 2007, 13:23

‘R reg xantia 1.9td’, is that a Mk II ?
I understand that the Mk II dash is totally different from the Mk I dash.
Here is the best description of the location by BonceChops:

BonceChops
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Posted: Wed Mar 29, 2006 7:02 pm
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The control module is sort of between the blower motor and the heating controls. It is mounted vertically almost next to the centre part of the dash. It slides up into a sort of recess in the dash for it. If you follow the thin wires on the blower motor connector you will find it.

Neil
Now Citroenless


Dash pictures here, but from a left-hand-drive:

http://www.frenchcarforum.co.uk/forum/v ... hp?t=17811
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weety
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Post by weety » 17 Jun 2007, 17:20

Clogzz wrote:‘R reg xantia 1.9td’, is that a Mk II ?
I understand that the Mk II dash is totally different from the Mk I dash.
Here is the best description of the location by BonceChops:

BonceChops
Joined: 28 Sep 2003
Posts: 449
Location: North West UK
Posted: Wed Mar 29, 2006 7:02 pm
Post subject:

The control module is sort of between the blower motor and the heating controls. It is mounted vertically almost next to the centre part of the dash. It slides up into a sort of recess in the dash for it. If you follow the thin wires on the blower motor connector you will find it.

Neil
Now Citroenless


Dash pictures here, but from a left-hand-drive:

http://www.frenchcarforum.co.uk/forum/v ... hp?t=17811


its one of the last of the mark1's.....they called them temptations and gave the LX some extra spec ....i will have another look and see if i can spot it

cheers

peter
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DickieG
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Post by DickieG » 17 Jun 2007, 18:49

I might be able to shed some light on this as I recently changed the matrix on my Activa and have a picture showing the wiring etc with dash removed. I also have another Activa stored at work with its dash removed which I can take a look at tomorrow.

Looking at the first of your three pictures there is a large rectangular ecu type box situated on top the the flat faced piece of plastic to the right of the fan housing.

In the third picture look towards the far right side and you will see some thin wires connnecting onto another tall thin ecu. This one is removed by unscrewing it from the bottom and pulling it down.

Having said that I don't know which ecu does/controls what!

Send me your email address and I'll send you the picture I have it's from the drivers side but of good quality.
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Post by weety » 17 Jun 2007, 20:15

ok there is a black and pink wire that run behind the plastic housing and head upwards towards the windscreen...i cant get my arm in enough to find what they connect to.....

could well be it but i cant see (short of taking more of the car apart) how to get to it

i can see the ecu in piccie three with the wires running to it....is it this one?

my e mail is all piccies gratefully received :D

cheers

peter
Last edited by weety on 28 Jul 2007, 09:32, edited 1 time in total.
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M reg xantia 1.9td 266000 miles expired
R reg xantia 1.9td 129000 miles veggy power
L reg renault clio 1.9D 91000 miles expired at 107000 miles
x reg clio 15d veggy power

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DickieG
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Post by DickieG » 17 Jun 2007, 21:23

weety wrote:i can see the ecu in piccie three with the wires running to it....is it this one?
Yes if we're talking about the same one :) I've emailed you a photo.

regards

Richard
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weety
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Post by weety » 18 Jun 2007, 19:28

DickieG wrote:
weety wrote:i can see the ecu in piccie three with the wires running to it....is it this one?
Yes if we're talking about the same one :) I've emailed you a photo.

regards

Richard


got your piccie cheers....ok i have now located what is probably the air con ecu....dont suppose anybody is selling one are they?
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M reg xantia 1.9td 266000 miles expired
R reg xantia 1.9td 129000 miles veggy power
L reg renault clio 1.9D 91000 miles expired at 107000 miles
x reg clio 15d veggy power

weety
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Post by weety » 24 Jun 2007, 16:47

right i think i have found it.....as described its high up between the heater main 'fan' box and the plastic piping after the pollen filter.....

its a white plastic connector with loads of wires going into it ....but....

i can get it of :( :( :(

it seems to detach upwards and i guess that the ecu will come with it if i can get it to come free (but i cant) definately not interested in detaching sideways (i can see metal 'prongs' underneath the connector when i er gently lever it with a screwdriver

trouble is there is very little space in there so i cant get a good grip on it

now where is my hammer............
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M reg xantia 1.9td 266000 miles expired
R reg xantia 1.9td 129000 miles veggy power
L reg renault clio 1.9D 91000 miles expired at 107000 miles
x reg clio 15d veggy power

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Post by weety » 01 Jul 2007, 22:40

me again....my woes increase ( i think i must have offended the great citroen god)

now the air con doesnt work....what is weird is that the front fans work intermitantly (with the air con switch on)

so either i have created a new electrical fault mucking around with various connections or it is out of gas (it was last regassed two years ago)

does anyone know of a good place to get regassing done around the orpington (south london) area?

Cheers

Peter
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M reg xantia 1.9td 266000 miles expired
R reg xantia 1.9td 129000 miles veggy power
L reg renault clio 1.9D 91000 miles expired at 107000 miles
x reg clio 15d veggy power

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Clogzz
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Post by Clogzz » 02 Jul 2007, 14:20

The cooling fans must always turn on at the low speed when the air conditioning is switched on.
Looks like a switching fault in the aircon ECU, possibly the connector plug.
It’s a sign that you’re getting close to getting it out. :wink:
Wouldn’t think of low gas now, the fans turning first is the ‘front end’ of the new fault.
Once the fans are back to normal, you can experiment with the pressure sensor plug to check for gas pressure and compressor function.
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weety
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Post by weety » 02 Jul 2007, 17:44

Clogzz wrote:The cooling fans must always turn on at the low speed when the air conditioning is switched on.
Looks like a switching fault in the aircon ECU, possibly the connector plug.
It’s a sign that you’re getting close to getting it out. :wink:
Wouldn’t think of low gas now, the fans turning first is the ‘front end’ of the new fault.
Once the fans are back to normal, you can experiment with the pressure sensor plug to check for gas pressure and compressor function.


yeah its a shame i cant work out how to get the ecu out :evil:

might need a bigger hammer!
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M reg xantia 1.9td 266000 miles expired
R reg xantia 1.9td 129000 miles veggy power
L reg renault clio 1.9D 91000 miles expired at 107000 miles
x reg clio 15d veggy power

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Post by Clogzz » 03 Jul 2007, 15:18

The board must slide out of grooves that have springy catches where some of the cutouts are. :?
Not the hammer yet, still the screwdriver. :)

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weety
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Post by weety » 03 Jul 2007, 15:21

i cant disconnect the wiring connection from the ecu.....looks like it comes of upwards (which doesnt make any sense to me.....i think i will have to tug the radio out and see if i can get at it from that side
0x
M reg xantia 1.9td 266000 miles expired
R reg xantia 1.9td 129000 miles veggy power
L reg renault clio 1.9D 91000 miles expired at 107000 miles
x reg clio 15d veggy power

weety
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Post by weety » 28 Jul 2007, 10:38

me again sorry for the long delay been working long days.....

i have someone stripping air con ecu plus other bits of an old activa for me but i was wondering if its possible to do a quick bodge just to get my air con working again

disconnecting the brown temp sender on top of the thermostat causes the fans to run at full speed

disconnecting the pressure sensor switch and bridging the low pressure side causes the fans to run however bridging high pressure side (ignition on engine not running) and the clutch doesnt engage

there is no live feed to either of the thicker wires so i assume thats the problem :roll:

so if i run a live feed to the appropriate thick wire am i just replacing the role of the air con ecu in 'telling' the air con to go on?

i assume i i do that the system would still be protected from low gas by the existing switches

(to be on the safe side i would also get the fans to run on low speed all the time)

are there any flaws in this cunning plan?

by the end of this i can see myself having the only xantia with a fully manual air con system!
0x
M reg xantia 1.9td 266000 miles expired
R reg xantia 1.9td 129000 miles veggy power
L reg renault clio 1.9D 91000 miles expired at 107000 miles
x reg clio 15d veggy power