Suspension Issues
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Cadillac DeVille 1985 to 2005 including:
1985-1992 Fleetwood, 1993 Sixty Special, All FWD Forum Discussion, Suspension Issues in Past Cadillac Vehicle Discussion; Help!!! I have a 03 DTS getting speed limited to 90 and service suspension message. Replaced rear shocks with arnotts ...
  1. #1
    FatCat03 is offline Cadillac Owners Member
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    Suspension Issues

    Help!!! I have a 03 DTS getting speed limited to 90 and service suspension message. Replaced rear shocks with arnotts shocks. dummy sensors installed both front and rear. Car drove above 90 for few days then message returned. Checked all sensors were plugged in.

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  3. #2
    Superjim's Avatar
    Superjim is offline Cadillac Owners Connoisseur
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    Re: Suspension Issues

    Pull the codes...
    The car will TELL you what is wrong with it.

    Texas Jim

  4. #3
    ogbuehi is offline Cadillac Owners Enthusiast
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    Re: Suspension Issues

    Wrong forum. This is for 2006-2012 DTS Cadillacs.

  5. #4
    OldFart's Avatar
    OldFart is offline Cadillac Owners Fanatic
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    Re: Suspension Issues

    Seems to be the right forum now.

    As Texas Jim stated, pull your own DTC codes and they will point us in the right direction. If you don't know how to pull the codes, read the sticky on how to pull DTC codes.

  6. #5
    FatCat03 is offline Cadillac Owners Member
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    Re: Suspension Issues

    Hey forum, I pulled the codes and came up with a rss co598 code?? Does anyone know what this means?? any help would be appreciated thanks

  7. #6
    JimD is offline Cadillac Owners Connoisseur
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    Re: Suspension Issues

    Quote Originally Posted by FatCat03 View Post
    Hey forum, I pulled the codes and came up with a rss co598 code?? Does anyone know what this means?? any help would be appreciated thanks
    C0598 is not a valid code. Typo maybe??

  8. #7
    FatCat03 is offline Cadillac Owners Member
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    Re: Suspension Issues

    Jim,You are right the code is rss C0578.

  9. #8
    JimD is offline Cadillac Owners Connoisseur
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    Re: Suspension Issues

    Quote Originally Posted by FatCat03 View Post
    Jim,You are right the code is rss C0578.
    C0578 - Left Front Solenoid Circuit High
    Whatever your problem is, it is located at the LF strut.

    From your original post
    "dummy sensors installed both front and rear."
    Whatever you installed at the LF (strut) connection has failed or is not connected properly.

    Since you replaced only the shocks, I can only guess at why you would be messing with the front end.

    Minor point, but those are not sensors. Arnott provides "resistors" that fake the suspension system control module into seeing an electrical load that is similar to the electrical load of the OEM parts. The complete system theory of operation is much more than 90% of drivers have any interest in knowing.

  10. #9
    FatCat03 is offline Cadillac Owners Member
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    Re: Suspension Issues

    Thanks Jim, the resistor(connector) that was installled on the driver front must be damaged from an aggressive bend when I was attempting to tie strap it to the strut. I'm thinking I must have broken one of the insulated wires maybe both. I plan on taking the resistor off and inspecting the lead wires .If I can't obtain another resistor what can i do to remedy the problem. I'm not savy with electrical diagrams, concepts and so forth..... but willing to try

    Thanks so very much for your responses you have been a tremendous help; i'm truly grateful

    FATCAT03

  11. #10
    JimD is offline Cadillac Owners Connoisseur
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    Re: Suspension Issues

    Quote Originally Posted by FatCat03 View Post
    Thanks Jim, the resistor(connector) that was installled on the driver front must be damaged....
    ....If I can't obtain another resistor what can i do to remedy the problem.
    Radio Shack is one source for a resistor that will satisfy the suspension control module. Ask for a package of 4.7K Ohm, 1/2 watt resistors.

    I recommend soldering the resistor into the circuit and take steps to insulate and waterproof.

    Happy to help.

  12. #11
    FatCat03 is offline Cadillac Owners Member
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    Re: Suspension Issues

    Jim I just inspected the resistor no damage I can see to the wires but for some reason this arnott resistor has two predrilled threaded holes in the center of it none of the others do. I'm not sure if it matters just wondering. As far as radio shack; is this a plug and play situation. or do i have to splice something.... not getting it

  13. #12
    FatCat03 is offline Cadillac Owners Member
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    Re: Suspension Issues

    Can I use the old harness from the resistor and connect with radio shack resistor and then plug connector into the harness on the car???

  14. #13
    JimD is offline Cadillac Owners Connoisseur
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    Re: Suspension Issues

    Quote Originally Posted by FatCat03 View Post
    Can I use the old harness from the resistor and connect with radio shack resistor and then plug connector into the harness on the car???
    Could you post a picture of the device that Arnott supplied?

    I have zero experience with Arnott parts so I am shooting from the hip in the dark.

  15. #14
    FatCat03 is offline Cadillac Owners Member
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    Re: Suspension Issues

    ok i will send a pic. at work now will be late tonight when i get home or in the am. I have the resistor from radio Shack have no idea what to do with it??? In terms of how to fabricate it to mate with the car's female connector. here is a link showing ther pic. Shocks for rear pic of resistor for front

    //www.arnottindustries.com/part_CADILLAC_Air_Suspension_Parts_yid6_pid45.html or.

  16. #15
    RippyPartsDept's Avatar
    RippyPartsDept is offline Hi, I'm Chris - Please Read My Signature
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    Re: Suspension Issues

    Quote Originally Posted by FatCat03 View Post
    Can I use the old harness from the resistor and connect with radio shack resistor and then plug connector into the harness on the car???
    yes, that's a great option

    you can either hack up the arnott parts or better yet, use the originals (if you still have them)
    Chris Heath (RippyPartsDept) is an ASE Certified GM Parts Consultant at Rippy Automotive
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