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ECS (AC) CODES S70 2000

posted by  Jims70 on  Fri Sep 28 07:52 CST 2018
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When car is first cranked, the RECIRCULATE and ON buttons flash for about 1 minute then stop flashing. All is normal from this point forward. The AC systems work fine. This flashing started a few weeks ago. Any comments on what the flashing means? Thanks Jim








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    ECS (AC) CODES S70 2000

    posted by  KlausC on  Fri Sep 28 08:47 CST 2018
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    last visit: Fri Oct 24 10:15 CST 2014
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    The 20 blinks indicates an error in the ECC. Most likely is the cabin temp sensor is dirty and the miniature fan cannot turn. The sensor is located in the row of switches to the right of the steering column, it has a small grill opening.

    You could try using a shop vac to suck dirt out of the grill. Or go the complicated route of pulling out the radio, pulling out the ECC unit, then reaching behind and taking out the sensor to give it a through cleaning. Just be very careful that you do not damage or bend the copper tube.

    You could make your own code reader to retrieve the codes and clear them, but once the error is resolved the blinking lights will stay off.
    --
    Keeping it running is better than buying new








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      ECS (AC) CODES S70 2000

      posted by  Jims70 on  Sat Sep 29 09:19 CST 2018
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      Thanks for the info. I'll try cleaning the sensor. What is involved in making a code reader? I have a reader but dosen't read volvo codes.








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        ECS (AC) CODES S70 2000

        posted by  KlausC on  Sat Sep 29 11:45 CST 2018
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        last visit: Fri Oct 24 10:15 CST 2014
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        https://www.matthewsvolvosite.com/forums/viewtopic.php?f=37&t=60660

        The above link shows a diagram on the first page. All you need are 3 wires, 3 paper clips, and an LED or 12V light bulb. Instead of port #3, use port #6 for the ECC.

        This will work just like the old fashioned OBD I system, a series of blinking lights (3 times) to correspond to the 3 number code.

        --
        Keeping it running is better than buying new







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