| Author | Message | ||||||
     Les Horne Unregistered guest Posted From: 81.31.117.38 |
Hi all. I posted a few months ago about no fans on the car and no functions etc for aircon, I have actually got round to searching for the faults. I wonder if anyone can supply me with a basic circuit diaram for the aircon/fans I think this is a 50k series (1996) and it uses the aircon prossecor board with the blue and yellow moulded sockets (not the edge type connectors. pinouts to and from this board would be usefull, or even a circuit diagram for the board (unlikely) thanks in anticipation...Les (Message approved by david_gore) | ||||||
| Paul Yorke Grand Master Username: paul_yorke Post Number: 671 Registered: 6-2006 |
Les you will need to get yourself a complete manual. here is an excerpt
Manuals available from many places including http://www.everythingrollsroyce.com/Royce_Workshop_Manuals.htm (Downloadable) | ||||||
| Paul Yorke Grand Master Username: paul_yorke Post Number: 672 Registered: 6-2006 |
hmmmm
sorry - don't think pdf's work. PM me your email if you like, but it is so complex, a manual is called for.  (Message edited by paul_yorke on 07 October 2010) | ||||||
| Richard Treacy Grand Master Username: richard_treacy Post Number: 2231 Registered: 4-2003 |
It comes as an unknown file, ie a .unk file (eg airconSZ_54000__on-10486.unk ), but fear not. Just save it and rename it as a .pdf file (eg airconSZ_54000__on-10486.pdf ). Then it opens fine. | ||||||
| Brian Crump Frequent User Username: brian_crump Post Number: 84 Registered: 2-2007 |
I have downloaded from the site you suggest Richard and the files do not open. Can you suggest what I am doing wrong? Regards, Brian | ||||||
| Richard Treacy Grand Master Username: richard_treacy Post Number: 2232 Registered: 4-2003 |
Worth a try
| ||||||
| Paul Yorke Grand Master Username: paul_yorke Post Number: 674 Registered: 6-2006 |
Richard - what did you do?  | ||||||
| Richard Treacy Grand Master Username: richard_treacy Post Number: 2233 Registered: 4-2003 |
Hi Paul, I saved it to my computer, renamed it as a .pdf, opened it to check it, saved it for good measure, then uploaded it to the site again. It seemed to do the trick. RT. | ||||||
| Richard Treacy Grand Master Username: richard_treacy Post Number: 2234 Registered: 4-2003 |
ps: it also works fine opening your file directly provided you tell the computer to open it with Acrobat or Adobe Reader. Then you can do as you wish. For some reason, our site did not like the file name that you used. You may try a simpler name as I did. In your naming, the airconSZ_54000_on.pdf came out as airconSZ_54000__on-10486.unk when I downloaded it or tried to open it, so I downloaded it instead. | ||||||
| Paul Yorke Grand Master Username: paul_yorke Post Number: 677 Registered: 6-2006 |
Shrugs - just doesn't like me! lol | ||||||
| Richard Treacy Grand Master Username: richard_treacy Post Number: 2236 Registered: 4-2003 |
Your last one came up as airconSZ_54000__on-1-10498.unk I could open it with a right click and "Open With" then selecting the Acrobat programme, but computers differ. Try renaming it AC54000.pdf before uploading it. RT. | ||||||
| Les Horne Unregistered guest Posted From: 81.31.117.38 |
Thanks guys, mine downloaded first time. thanks for the info Paul, it is useful but what I actually need is the input side of the Micro board, (LH) plug , you know , where all the monitor and control systems go in, I have started to refurb my PCB and found a few things definatly faulty so far ( Darlington arrays) but will need the pin outs on the left hand side to emulate the signals on the bench.(PCB with yellow and blue plugs) 50K series. PS quite happy to buy a manual if available, regards Les (Message approved by david_gore) | ||||||
| Richard Treacy Grand Master Username: richard_treacy Post Number: 2238 Registered: 4-2003 |
Do you have this stuff ?
Also, if you are short of Darlington arrays or microrelays, I can help. RT. | ||||||
| Les Horne Unregistered guest Posted From: 81.31.117.38 |
Thanks Richard, thats exactly what I needed, I can now get to grips with faultfinding the board. thank you or your kind offer re, relays and darlingtons, but I have them here at work and the relays are only £1.35 each from RS (I have replaced them for good measure) although they test out OK.once I have devised afault finding procedure I will let you have it, for onward transmition to anyone that finds themselves with similar issues as myself, It might help someone ! best wishes and thanks for now..Les (Message approved by david_gore) | ||||||
| Richard Treacy Grand Master Username: richard_treacy Post Number: 2241 Registered: 4-2003 |
No problem, glad it helps. I guess that you well know the caution that those print microrelays come in two pinout configurations with the same footprint. The Fujitsu is my preferred brand (FBR211SB D012-M), but Tyco and the rest are fine. RT. 
(Message edited by Richard Treacy on 16 October 2010) | ||||||
| les Horne Unregistered guest Posted From: 81.31.117.38 |
Hi all, you might remember a while ago I asked about the fan control and air con module wiring diagrams for the Turbo R. well I actually got to work on it after the bad weather we have had in the uk. I built atest rig to emulate the requirements of the car and set to work on the module. worked it through and with the help of a bit of painstaking fault finding and the change of a few ICs have now got it working on the bench, I will try the unit in the car over the next few days and report back. the fault finding is quite straitforward one you get into it, If all is well I will write up details of the test rig and procedure and post it here for all. you never know it might help someone,, thanks to all that sent me the wiring diags, they wer essential.. best wishes ...Les (Message approved by david_gore) | ||||||
| Omar M. Shams Prolific User Username: omar Post Number: 184 Registered: 4-2009 |
Dear Les, I will be keeping a keen eye on this thread. Thanks for your desire to help the rest of us out there. All my cars struggle with airconditioning in Dubai in the heat of summer. I have just bought a 96 model car, so that should benefit form your hard work once I get possession of the car. thanks Omar | ||||||
| Richard Treacy Grand Master Username: richard_treacy Post Number: 2296 Registered: 4-2003 |
Incidentally, last Sunday I finally became fed up with some of the logic in the fresh air/recirculation function (the Screen/Facia/Recirc switch), so have disconnected it from the computer and rewired it the way I want it. There is no loss of useful functionality and no visual change, but now the computer can’t boss you around so much. It is one part of functionality tuning, often asked for by many Forum posters around the world, to help the system cool the cabin quicker when hot. Under certain circumstances such as very hot weather when the cabin is still cooling of after being parked, the computer will not let you switch from recirculating air to fresh air. That is especially annoying when the system is locked on recirculating by the computer because the cabin is very hot, yet you want to tap the more moderate ambient outside as it needs less refrigeration to cool it down. That is rotten when you enter or leave a tunnel like the M5 with a hot cabin and are unable to control the recirculation until Big Brother Says So. Unmodified, when everything is stable it will do everything as desired. Modified, it is set up to function the same as if the temperatures were always stable, and will change over on demand at any time. It simply required a relay so that the recirculation flaps can be moved between the two settings whether the computer wants them to or not. Wiring is minimal: to the relay is connected a pair of wires to each flap servo (one for OPEN and one for CLOSED, a wire to the Screen/Facia/Recirc switch harness and a wire to the climate control power supply. RT. | ||||||
| Les Horne Unregistered guest Posted From: 81.31.117.38 |
Well i tried the unit back in the car and "nothing" I am convinced that the control pcb is now working certainly in the area of fan control water tap A/C clutch and rear window /mirrors all these outputs are now active on the bench. in the car it is as if it was dead. I have checked all the basics ie supply to the board engine running 14v, etc it is if somthing is inhibiting the controler. now although the unit appears to work on the bench with the essential connections my drawings do not show all connections, and I am short of information on the following pins of the board.BLUE 1,3,4,13,22,23,24 & 26 YELLOW 8,9,11,13,14,16,17,19 & 25 If anyone has any info on the signals /voltages on these pins it would help. Paul I know you have manuals available on disk etc would they contain this information if so I will purchase one. I will not be beaten by a few electronics lol. best wishes Les (Message approved by david_gore) | ||||||
| Les Horne Unregistered guest Posted From: 81.31.117.38 |
Back again with an update, Having repaired the Upc board and got it working on a test bed on the bench It failed to work in the car. since then I have found a couple of problems with the wiring on the car. first off is no continuity from the engin etemp connector on the board to ground this could be the sensor itself or wiring (any clues where the sensor is and how to access it)? the next is the common end of the parrelel wired temprature potentiometers to pin 26 of the board is also O/C (need to remove the center console to get to the controls) any clues)? and finally the water tap solenoid seems to be O/C from the control relay under bonnet to ground this could again be the solenoid itself or the wiring, ( any clues where the water tap solenoid is and how do i get to it? ) I assume the solenoid is open (ie water through the heater matrix when de-energised as I get perminant hot air ? ..well guys I am building quite a fault finding manuel for the air con/fans control circuitry of this car and enjoying every minite of it. not to mention a purpose built test rig that will test the micro board and the on car electrics easily. so if anyone can assist with the above queries I would be greatful. Oh and by the way thanks for the manuel I orderd from you...just what the doctor orderd.. best wishes Les (Message approved by david_gore) | ||||||
| Lews Horne Unregistered guest Posted From: 81.31.117.38 |
Update of the above. CRACKED IT ! yes now I have fans and control of them from the car. as stated the board did work on the test rig but not in the car, believe it or not this stupid situation was due to bad connections on the blue and yellow plugs from the wiring loom to the board, Chopped them off and replaced them and it bursts into life.. yippee. Paul the manuel I had off you was a great help THANKS AGAIN, one or two electrical faults to sort out (they are under the bonnet) like the water tap not opperating. but at least i know its not the circuit board. I did have to change a few ICs on the board because it had obviousley been blown up in the past. I know this mini computer intimatly now so if anyone needs any advice on faults, faultfinding or repairs I would be more than happy to pass on my knowledge.. Now I must join the club properly (if you will have me) By the way Paul, there are a couple of things I would like done on the car that is beyond my skill set or tool set, perhaps I could speak to you sometime regarding this ? Best wishes for now everyone... Les (Message approved by david_gore) | ||||||
| Omar M. Shams Prolific User Username: omar Post Number: 193 Registered: 4-2009 |
Dear Les, I am sure i will be making contact with you in the future. Well done on cracking the secrets of how it all works. Do you have any notes that could summarise your knowledge of the system? thanks Omar | ||||||
| Les horne Unregistered guest Posted From: 81.31.117.38 |
Hi Omar, loads of notes but I will have to put them in some sort of logical order, eg faultfinding on the car, testing the pcb and determining where the faults are on the board and how to identify the faulty components, along with the common failures (there are a few) its been a big learning curve but glad i stuck at it (Message approved by david_gore) |
