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Cadillac STS Forum - 2005 through 2012 Discussion, Speed limited to 120mph in Past Cadillac Vehicle Discussion; For those following ... The message still comes on randomly after replacing the shock....
  1. #31
    Ludacrisvp's Avatar
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    For those following ... The message still comes on randomly after replacing the shock.

  2. #32
    EChas3's Avatar
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    Re: Speed limited to 120mph

    Have the codes been cleared?

    It's not a Canadian car is it?

  3. #33
    EChas3's Avatar
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    Re: Speed limited to 120mph

    Dplicate post.

  4. #34
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    Quote Originally Posted by EChas3 View Post
    Have the codes been cleared?

    It's not a Canadian car is it?
    That's part of the issue ... Even though the car shows it on the DIC and it stops acceleration silently at 120mph (even if the message had not come on at all during that ignition cycle) there are no codes.
    I don't think it's a Canadian car... How would I be able to determine this?

    I did notice that the fenders are rolled in... This would mean the car had some larger wheels at some point in time I would assume. Would that relate / contribute / indicate anything? Like would some one modify something else to avoid codes of some kind that might explain the issue?

  5. #35
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    Re: Speed limited to 120mph

    Mine goes to at least 135, at least - i have that on good authority. But it is not a fleet / rental car. Platinums were not allowed to be ordered in conjuction with fleet cars. The limit is probably the drag induced limit of 155-160. that MT and C&D reported on back several years ago.

    Most rentals did not have the W rated tires on them. Check CarFax to see in you are not certain, or check with your dealer and get a build sheet. it WILL show if it was a fleet order.

  6. #36
    Ludacrisvp's Avatar
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    The saga continues...

    Saw the message again on Sunday and the dealer had my car for a couple days but they are unable to reproduce the issue. They say they're unable to find any DTCs stored in the car.

    They have provided me with a J-42598-B snapshot device.
    VDR CAN+ is on the side of it.

    Hopefully the next time it comes up I will be able to snap it and that this thing will record something useful.
    They claimed they had to get a new one of these since what they had "wasn't fast enough to record this car".

    It has what appears to be a RJ45 Ethernet Jack on it, anyone know if it actually is Ethernet or if it is just using that connector as a serial port RS232 connection?
    Would be interesting to see what it actually records.

  7. #37
    carter's_sts is offline Cadillac Owners Connoisseur
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    Weird that no normal codes are stored. When it shows up on the DIC, how long is it there for?

  8. #38
    carter's_sts is offline Cadillac Owners Connoisseur
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    Also just wondering, does it seem like anything triggers it, like rainy out or driving over bumps?

  9. #39
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    Comes up for a few seconds at most. No real pattern of when.

  10. #40
    carter's_sts is offline Cadillac Owners Connoisseur
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    What a PITA. Hopefully the snapshot device can catch it.

  11. #41
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    Re: Speed limited to 120mph

    This addresses your question from quite some time back, but I didn't see anything since that suggested you ever got an answer. I don't believe that being a Canadian car has anything to do with this, however there are a few easy ways to tell (not sure if you've done this already or not). First, the speedometer will go to 240, not 160. Also, the Passenger Presence System indicator will display symbols instead of text. Finally, and the most reliable indicator, all Canadian cars have RPO "Z49 - Canadian Base Equipment".

    ----------

    Quote Originally Posted by Ludacrisvp View Post
    It has what appears to be a RJ45 Ethernet Jack on it, anyone know if it actually is Ethernet or if it is just using that connector as a serial port RS232 connection?
    Would be interesting to see what it actually records.
    I'm not certain on this device, however the Tech2 also has an RJ-45 connector that is actually a serial port.

  12. #42
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    Quote Originally Posted by ddalder View Post
    This addresses your question from quite some time back, but I didn't see anything since that suggested you ever got an answer. I don't believe that being a Canadian car has anything to do with this, however there are a few easy ways to tell (not sure if you've done this already or not). First, the speedometer will go to 240, not 160. Also, the Passenger Presence System indicator will display symbols instead of text. Finally, and the most reliable indicator, all Canadian cars have RPO "Z49 - Canadian Base Equipment".

    ----------


    I'm not certain on this device, however the Tech2 also has an RJ-45 connector that is actually a serial port.
    So nope, not Canadian.

    The CTS V w/ MRC has a known issue w/ a TSB that talks about how it can have a speed limited issue as well that also fails to leave DTCs behind.
    I've mentioned this to the dealer and all of them just say that car is too different from this so it doesn't even matter. I can't get any of them to give those steps any serious thought.

  13. #43
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    Re: Speed limited to 120mph

    Well the car decided to lose its mind tonight when I started it up to move it out of the garage to put the lawn mower away.
    I was greeted with a slew of messages from the DIC. I did have the Snapshot device still attached so I grabbed 2 snapshots of this event.




    Service Brake Assist
    Service Stability Sys
    Radar Cruise Not Ready
    Traction Control Disabled

    Went for a drive like this, it felt like it does every day.
    As far as I know the suspension system would be disabled in this state.
    Today on the way home from work I swear the car's ride was better than it had ever been.
    I have to wonder if most of my driving is done with a disabled suspension system.

    Restarted the car after the drive, behavior of the car remained the same, except that T/C and Cruise worked again and no indications that these lights had ever been on.

    Never did see it pop up with the Speed Limited message while those were ticking by.


    .... Coming up on the 1 year anniversary of the first time I was lucky enough to see such a cool message... :-/

  14. #44
    MoistCabbage's Avatar
    MoistCabbage is offline Cadillac Owners 10000+ Posts
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    Figured I'd post this here.

    A suspension issue on my generation Seville would normally trigger a SPEED LIMITED TO 90 message. But I, being me, got this:



    Thought it was funny when I saw it.

  15. #45
    Ludacrisvp's Avatar
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    Lol nice. Sounds like we share the same kind of luck.

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