'90 240 check engine light but no codes

Discussion in 'Volvo 240' started by James Sweet, Aug 14, 2009.

  1. James Sweet

    James Sweet Guest

    So the check engine light has been on in my friend's 240 for a couple
    weeks and he says the fuel economy has been lousy. I checked for fault
    codes and it flashes 1-1-1 which I gather means no codes are stored.

    I've never dealt with one this "new" so I'm not terribly familiar with
    it, but shouldn't anything that turns the check engine light on also
    store a code?
     
    James Sweet, Aug 14, 2009
    #1
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  2. Sure, if the computer was OK. No codes, can always be a defective
    computer. If the computer is defective, it might not be able to know
    what code to flash.

    The codes for 1989 to 1993 Volvos are at
    http://www.troublecodes.net/Volvo/
     
    Stephen Henning, Aug 14, 2009
    #2
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  3. James Sweet ha scritto:
    Hi, was checked both injection and ignition system?
    Both ecu says "111"?
     
    Telespalla Bob, Aug 14, 2009
    #3
  4. James Sweet

    James Sweet Guest


    Does the ignition control unit store codes separately? How does one
    check those? I thought everything was accessed through the one OBD
    interface?

    I used instructions I found online. Plug the probe into port 6 of the
    diagnostic socket with the ignition key set to accessory and push the
    button for 1.5sec, at which point I get three evenly spaced blinks.

    OBD is cool, but it's a luxury I've never had.
     
    James Sweet, Aug 15, 2009
    #4
  5. James Sweet

    GlennK Guest

    A2 is Fuel Side
    A6 is Ignition Side
    Do the same for A2 & this is where you will find your code or codes
    write them down so you do not lose track of what you started with
    Glenn K
    Volvo Certified Technician 2008
    ASE Certified Technician 2008
     
    GlennK, Aug 15, 2009
    #5
  6. James Sweet

    GlennK Guest

    A2 is Fuel Side
    A6 is Ignition Side
    Do the same for A2 & this is where you will find your code or codes
    write them down so you do not lose track of what you started with
    Glenn K
    Volvo Certified Technician 2008
    ASE Certified Technician 2008
     
    GlennK, Aug 15, 2009
    #6
  7. James Sweet

    GlennK Guest

    A2 is fuel
    A6 is Ignition Side
     
    GlennK, Aug 15, 2009
    #7
  8. James Sweet

    James Sweet Guest


    Ah, that's what I needed, thanks! Hopefully I'll have a chance to check
    it out this weekend.
     
    James Sweet, Aug 15, 2009
    #8
  9. James Sweet

    James Sweet Guest



    So I finally had a chance to check this and it gave me 213. From what I
    can tell, that's TPS signal stuck full rich, which would explain the
    lousy fuel economy. I didn't have my multimeter with me so I couldn't
    test the switch. Does a '90 have the older style TPS that is just a
    couple of switches, or is it the later style potentiometer?
     
    James Sweet, Aug 19, 2009
    #9
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