How do you check for codes on a 1994 850?

Discussion in 'Volvo 850' started by GamePlayer No. 1058, Feb 28, 2004.

  1. Is there a laymans way to check for codes on a 1994 850, or must it be done
    with a scan tool? Since this vehicle is pre OBD II, I would assume there is
    a way to do it with flashing led's, or even with the digital clock on the

    GamePlayer No. 1058, Feb 28, 2004
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  2. GamePlayer No. 1058

    Doug Warner Guest

    Under the hood, on the front of the computer box are two small
    connector blacks, marked A and B. The A side has a wire wiith a plug,
    a button, and a LED. With the ignition on, you plug the wire into a
    hole (A2 for engine) and press the button for about 1 second and
    release. The LED will blink some number of times for the first
    number, pause, then blink again for the second and third digits.
    1-1-1 is no faults found.
    There may be more than one code stored, You have to press the button
    again after the first one displays to see if there's another one.
    Once they've all displayed, you can clear with a log press (5-10
    seconds, then wait til the light comes on, and do another long press.

    Here's a picture of the connectors and the service light clearing

    Some codes, for various systems are listed here:

    To get all of them, and the corrective actions / troubleshooting
    procedures, you need the factory service manuals. Forunately, these
    are still available for 94 models. (But not for anything past 1998)

    The lack of owner-affordable service data for new Volvos is the
    primary reason I won't be buying one.

    To reply, please remove one letter from each side of "@"
    Spammers are VERMIN. Please kill them all.
    Doug Warner, Feb 29, 2004
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