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  1. #1
    I build plastic Airplanes
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    2k Z24 Cavalier Automatic C1275 PCM requested ETS/TCS to be disabled (engine proble

    Any thoughts on this?

    Code popped up even after PCM reset
    [Brake] C1275 - (History) (Current)

    Looked this up...
    C1275 PCM requested ETS/TCS to be disabled (engine problem)

    Not an actual SES light but HPtuners scan is picking it up. Car has ALWAYS had brake issues. I found this site, really gives a good explanation of the ABS system.


    http://www.aa1car.com/library/abs_delphi_dbc7.htm


    Thats where I found the better description of the trouble code. What does it mean by "engine problem" that the PCM would send a signal to turn off ETS/TCS?



    Also with brakes sucking, I have suspected at times(I could be 100% wrong) that the brake proportioning was off.


    Could this be related?

    DBC-7 BRAKE PROPORTIONING
    Something you won't find on a DBC-7 equipped vehicle is a brake proportioning valve. DBC-7 uses the ABS solenoids to reduce pressure to the rear brakes during normal [COLOR=blue ! important][COLOR=blue ! important]braking[/COLOR][/COLOR] to maintain proper brake balance. This is done by monitoring front and rear wheel speeds, and reducing pressure to the rear brakes as needed when there's a difference in wheel deceleration rates.
    The controller energizes the inlet valve solenoids for both rear brakes to hold pressure in the lines, and then energizes both rear outlet valve solenoids to release pressure as needed. The pump may also run to clear the accumulators if a sufficient number of release cycles are required.
    The "dynamic" rear proportioning function is enabled at all times unless there is a failure of the EBCM or two wheel speed sensors on the same axle both fail simultaneously (a code C1248 will be set if the system is disabled). But as long as there is at least one functional speed sensor on the front and rear axles, the EBCM can compare the relative speeds of the front and rear wheels.
    Another new feature of the DBC-7 is the ability to detect low [COLOR=blue ! important][COLOR=blue ! important]tire [COLOR=blue ! important]pressure[/COLOR][/COLOR][/COLOR]
    . A tire that is underinflated will have a slightly smaller rolling radius than one that is properly inflated. This will create a difference in the wheel speed sensor reading if the difference in inflation pressure is 12 or more pounds. The EBCM will then turn on the "Low Tire Pressure" warning lamp to warn the [COLOR=blue ! important][COLOR=blue ! important]driver[/COLOR][/COLOR] his tires need attention.
    Quote Originally Posted by civic-si View Post
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  2. #2
    OF Junior Member
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    Hmm? We have a GM factory tech in house. He has ALL his GM certifications and has the GM Tec 2 programmer.
    Custom mandrel bending and light metalfabrication.
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    Orlando FL 32839
    sales@exhaustdepot.com
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    Off Orange Ave

  3. #3
    OF Senior Member Michael's Avatar
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    PM the user name Fluffy I think he will be able to help you, Ill tell him to check his PMs later k?
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    i thought every 67 year old slave beater had a facebook???
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    horray for driving with out cats...

    of course for legal purposes, i mean felines, of course...

  4. #4
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    I have the exact same problem as was described by Mustangeater.

    Just wondered what the solution to this problem was?

    Thank you

  5. #5
    I build plastic Airplanes
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    Quote Originally Posted by jackdup View Post
    I have the exact same problem as was described by Mustangeater.

    Just wondered what the solution to this problem was?

    Thank you
    bit late... but apparently there was an issue with the harness for the transmission. You have to be careful to replace both sides of the harness you have to pull the tranny.

    I pulled the plug, and reput it back in and everything cleared up. Forgot exactly what it was, but one or two of the wires lost signal, not showing the transmission what kind of shift the driver was requesting, so it just gave full pressure to the tranny as a default.
    Quote Originally Posted by civic-si View Post
    I Luv Pr
    Pr Is Best
    No One Is Better
    We Are Kings
    We Are Sexy
    We Have Nice Nice Honda's
    We Fight Better Than All Of You
    We Have The Best LookIN Girls
    We Have Girls With The Fatest Asses
    And The Cutest Faceses
    We'r Not Gay Like You
    Quote Originally Posted by civic-si View Post
    We Are The Best In The World Punk Bitch

  6. #6
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    Thanks

  7. #7
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    MustangEater... how did you or your mechanic come to that conclusion to fix the problem, my cars throwing the same exact code and just dies on me randomly leaving me stranded every other day for 1-3 hours at a time. My mechanic is insisting that i need a new computer but i keep thinking it has something to with my Tranny because of how the car begins to stall out and downshift rapidly before dying out, but then it doesnt start for a while unless i reset the computer by disconnecting the battery (-).

    My bad for the rambling but im desperate at this point. THX
    Last edited by BMArias15; 11-17-2011 at 05:30 PM.

  8. #8
    I build plastic Airplanes
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    Well this has to be one of the most spread out threads ever.

    I don't remember I think I just googled and googled. But apparently a harness to the transmission (it was a 2000 z24 Cavalier A4) was a little short, and gets stressed, and will loose contact. Its a decent sized cannon plug like 20 pins. I just unseated and reseated, and it lost connection.

    I guess if the car is telling the torque converter something funky it could cause issues.


    Either way it drove for at least a year never showing the problem again, had a bad fuel pump and coolant leak, fixed fuel pump and sold it early 2011, told the owner of the coolant leak.

    Got $2500 for it too. :)

    Bought a new beater for $2k, and still driving it now.
    Quote Originally Posted by civic-si View Post
    I Luv Pr
    Pr Is Best
    No One Is Better
    We Are Kings
    We Are Sexy
    We Have Nice Nice Honda's
    We Fight Better Than All Of You
    We Have The Best LookIN Girls
    We Have Girls With The Fatest Asses
    And The Cutest Faceses
    We'r Not Gay Like You
    Quote Originally Posted by civic-si View Post
    We Are The Best In The World Punk Bitch


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