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AMM error 700 1990

posted by  someone claiming to be Dennis Burford on  Wed Feb 27 16:27 CST 2008 [RELATED]

Hello Brickxperts,

My boy's 740 (1991 body with 1990 engine) has given us the check engine light. 1-2-1 was the code. We changed out the AMM with a good spare, still getting the light and the 1-2-1 code. Anything else I should look for? What possibly (other than the wiring harness - please! no!) could be throwing this code at us.

Thanks for the advice, as always.

Dennis








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    AMM error 700 1990

    posted by  B.B. on  Sun Mar 2 12:46 CST 2008
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    last visit: Mon Oct 6 13:15 CST 2014
    [RELATED]

    Hi Dennis,

    After you check for snafu AMM connectors and use the CRC spray
    You can also check to see that you have full battery voltage
    at the AMM

    Pin 1 /Brown wire = Ground
    Pin 5 /Blue/Yell wire = +12.6 engine off <+14 running

    Could be a ratty ground or Pos terminal connection.

    Don't worry too much about a harness problem,
    besides the above, there's only three direct wires to the ECU

    Good Luck, Bill








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    AMM error 700 1990

    uid 18083's pic
    posted by  lucid on  Thu Feb 28 01:26 CST 2008
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    last visit: Fri Oct 24 12:31 CST 2014
    [RELATED]

    Check for corroded or dislodged connector pins at the AMM.
    --
    Bruce Young
    '93 940-NA (current), 240s (one V8), 140s, 122s, since '63.








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      AMM error 700 1990

      posted by  someone claiming to be Dennis on  Fri Feb 29 10:00 CST 2008 [RELATED]

      Thanks Bruce will do. Isuppose also there exists the possibility that the second AMM is also bad, being it is from a parts car .....
      Dennis








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        AMM error 700 1990

        posted by  CalW on  Sun Mar 2 11:47 CST 2008
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        last visit: Sat Sep 3 15:39 CST 2011
        [RELATED]


        If you didn't do this with the first AMM, suggest you do it with both. CRC Mass Air Flow Sensor Cleaner. $6. Clean them thoroughly. This has worked wonders on the AMMs on two cars, in the many months since I gave the first AMM up for dead.

        It's about the only stuff out of a can that I believe in.

        Except for beer, of course.






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