a/c and recirc lite flashing in 89 780 bertone. Topic is solved

780 bertone · Post by **780 bertone** » 21 Jan 2007, 11:50

a/c and recirc lite flashing only when car comes up to temperature everything stops working ,blower fan quits a/c quits no cold air nothing works,car cools down and a/c works again.any help is appreciated. read some of the other a/c lite flashing on the forum says fan motor drawing to much current,but seems it only does it when car is up to temperature. thank you in advance.

Post by **billofdurham** » 21 Jan 2007, 15:24

Welcome to Matthew's Volvo Site.

The ECC on your car has an in-built diagnostic unit from which you can read fault codes.

Usually the unit would detect problems as soon as the ignition is switched on and the instructions are written for this. However, I would suggest that you drive until the lights start to flash then start the diagnostic test. Hopefully it will produce an answer.

Bill.

780 bertone · Post by **780 bertone** » 22 Jan 2007, 11:31

thank you for the info i got a 233 code so i am going to get a new blower motor. i had another question about the 780 is there any way to retrieve codes for engine/transmission problems dont have a problem as of now but volvo charges 180.00 diagnostic fee had oxygen sensor go a few months back.thank you for your help.

Post by **billofdurham** » 22 Jan 2007, 12:29

I'm glad it showed something, but it's a pity it is going to cost you money.

If you have the 780 non-turbo version your diagnostic system does cover the fuel and ignition systems so would have picked up a faulty O2 sensor. However, it does not cover the transmission.

See my post on testing for codes at: https://www.matthewsvolvosite.com/chat/p ... php?t=9708

This is headed 740 but the systems are the same. Go to page 2 and scroll down.

If you have the turbo version you can't access the codes without special equipment.

Any questions don't hesitate to ask.

Bill.

780 bertone · Post by **780 bertone** » 22 Jan 2007, 14:06

it is a 2.3 turbo what type of special equipment is it like a obd/obd2 code scanner or something like that if so can i purchase it somewhere or is it a volvo only special tool?thank you for the info and the quick response.

Post by **billofdurham** » 22 Jan 2007, 15:53

Unfortunately, special equipment. The two parts are highlighted.

Bill.

780 bertone · Post by **780 bertone** » 22 Jan 2007, 17:12

im a little confused so i can not pull any codes from the car for example o2 sensor without the calibration tool and adaptor.thank you for your time.

Post by **billofdurham** » 23 Jan 2007, 11:54

I am also confused. The instructions I am working from are for US models. When I saw the relevant paragraph for testing codes on the 780 turbo I assumed that it must be different to others. However, since you queried it, I have checked for other models and found the same instructions apply to the 740, 760 and 940 turbo.

When I had my 940 turbo I was able to access fuel and ignition codes from the box in the engine compartment. Has your car got this box? There is a picture of the box, with its location, on Page 1 of the link I gave you.

If the box is there then you will lose nothing by trying to run the diagnostics with it.

Please keep me updated as I would be able to amend the instructions I have.

Bill.

780 bertone · Post by **780 bertone** » 27 Jan 2007, 11:02

ok i replaced the blower motor as per code can run fan on 1 or 2 all day long no problem set to auto and still does same as before after car is running a while and flashes same 233 code. question is ,is there a relay or resistor in the blower circuit? if so could you tell me where it might be? thank you for your help.

Post by **billofdurham** » 27 Jan 2007, 12:16

There is a high speed blower relay. It took some finding but here is a diagram. It is on top of the heater unit.

Bill.