2003 DHS; Suspension, ABS, and idle problems, and a stack of codes. Help interpret!!
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Cadillac DeVille 1985 to 2005 including:
1985-1992 Fleetwood, 1993 Sixty Special, All FWD Forum Discussion, 2003 DHS; Suspension, ABS, and idle problems, and a stack of codes. Help interpret!! in Past Cadillac Vehicle Discussion; OK folks. Need some help here. Car--- 2003 DHS with 120K miles on it. Normal Deville; basically drives well. Just ...
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    redfishsc is offline Cadillac Owners Fanatic
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    2003 DHS; Suspension, ABS, and idle problems, and a stack of codes. Help interpret!!

    OK folks. Need some help here.

    Car--- 2003 DHS with 120K miles on it. Normal Deville; basically drives well. Just uses oil (less, since I started WOT treatment).

    Problems: Now, it's idling rough, having constant "Service Stability System" warnings, and now we are getting the BRAKE, TRACTION, and ABS lights on all at once. Sometimes they go off, but the past few days they've been on. I can't turn Traction Control on or off, and I fear the ABS won't work either (haven't tried to lock them up; too risky).

    -----The car does seem to ride a bit bouncy. Not quite as smooth as it once was. I do occasionally feel some wobble coming through the steering wheel and front of the car. Front brake pads and rotors are only about 9 months old, and the brake does not pulsate. You feel it at 50-70mph. Not bad, but it wasn't there before.


    Codes:, with some possibly pertinent info that might explain them (I'm sure half of these codes are old news and not critical).


    current.......C1214 - System Relay Contact or Coil Circuit Open
    current.......C1248 - EBCM Turned the Red Brake Warning Indicator On (I had the car backed up to the wall in the carport that turned on the reverse warning .................................................. ..............................sonar thing, is this what this means?)


    history......C1287 - Steering Sensor Rate Malfunction
    history.....C0658 - Level Control Compressor Circuit High

    history.....U1064 - Loss of Communications with DIM
    history.....U1128 - Loss of Communications with IRC
    history.....U1713 - Loss of Front Door Module to Window Motor High Speed Comm. (front door windows work fine, but the passenger's rear window malfunctioned and I have it wedged closed, and motor ...............................disconnected, at the moment..... could this be part of this code????)

    history.....B1327 - Vehicle system voltage below 9.0 volts (battery died on us 8 months ago and it was replaced, I'm sure this code refers to then.... I hope).








    ---- All codes were erased, and immediately the "Service Stability System" and the Brake/ABS/Traction lights came back on.

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    redfishsc is offline Cadillac Owners Fanatic
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    Re: 2003 DHS; Suspension, ABS, and idle problems, and a stack of codes. Help interpre

    By the way, I have not replaced the spark plugs on this car. This occurred to me today; I need to replace them since I am not sure the last time they were changed, if ever.

  4. #3
    Ranger's Avatar
    Ranger is offline Cadillac Owners Member
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    Re: 2003 DHS; Suspension, ABS, and idle problems, and a stack of codes. Help interpre

    current.......C1248 - EBCM Turned the Red Brake Warning Indicator On (I had the car backed up to the wall in the carport that turned on the reverse warning .................................................. ..............................sonar thing, is this what this means?)
    No, it means that the EBTCM turned on the red brake warning indicator on the DIC.


    current.......C1214 - System Relay Contact or Coil Circuit Open
    This is probably your brake, T/C & ABS problem. Start by checking the fuses and relays.

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    redfishsc is offline Cadillac Owners Fanatic
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    Re: 2003 DHS; Suspension, ABS, and idle problems, and a stack of codes. Help interpre

    Quote Originally Posted by Ranger View Post
    No, it means that the EBTCM turned on the red brake warning indicator on the DIC.
    OK, interesting. It gives me a code that tells me it turned on a warning light. Seems to me like the warning light by itself would be sufficient. Seems like having an alarm that goes off if your alarm goes off.



    This is probably your brake, T/C & ABS problem. Start by checking the fuses and relays.
    OK, will check this tomorrow. However I'm not entirely sure it could be a fuse unless it was coming loose. This light combination has come on several times recently but it always went away after turning off the car and turning it back on (a time or two), but now it's on entirely.


    I also confirmed solidly that the traction control is NOT working. It rained today, and you CANNOT put this car in WOT at all without going into a full scale burnout and underwear-soiling, even at 50+ mph.

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    Ranger's Avatar
    Ranger is offline Cadillac Owners Member
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    Re: 2003 DHS; Suspension, ABS, and idle problems, and a stack of codes. Help interpre

    OK, will check this tomorrow. However I'm not entirely sure it could be a fuse unless it was coming loose. This light combination has come on several times recently but it always went away after turning off the car and turning it back on (a time or two), but now it's on entirely.
    Maybe a relay stuck in the open position?
    C1214 - System Relay Contact or Coil Circuit Open

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    redfishsc is offline Cadillac Owners Fanatic
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    Re: 2003 DHS; Suspension, ABS, and idle problems, and a stack of codes. Help interpre

    Quote Originally Posted by Ranger View Post
    Maybe a relay stuck in the open position?
    C1214 - System Relay Contact or Coil Circuit Open
    Definitely a possibility. I have a Hayne's (or possibly a Chilton's) manual somewhere on this car. Would it tell me where to look for relays?

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    MoistCabbage's Avatar
    MoistCabbage is online now Cadillac Owners 10000+ Posts
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    The relay is internal to the EBTCM, and not serviceable. You can try cleaning the connector pins/contacts, but the EBTCM is likely faulty.

    Haynes/Chiltons manuals are next to worthless for these cars, a "real" Helm Factory Service Manual is what you need..

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    redfishsc is offline Cadillac Owners Fanatic
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    Re: 2003 DHS; Suspension, ABS, and idle problems, and a stack of codes. Help interpre

    Would this be the $600 ACDELCO Part # 12226955 from Rock Auto??????? Good grief. Gonna spend a lot of time looking for something else before I drop that bomb.

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    redfishsc is offline Cadillac Owners Fanatic
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    Re: 2003 DHS; Suspension, ABS, and idle problems, and a stack of codes. Help interpre

    Anyone ever work with these guys? If I end up having to pull this thing off, I may try having them repair it.

    http://www.absfixer.com/catalog/prod...d982os6ujm05q2

    I've read a few posts here and there about folks pulling the EBTCM apart and finding loose solder joints. If this is a possibility, I may give it a shot, as long as regular solder (60/40 or similar) for electronics can be used. I'd also find some non-corrosive silicone to repair any spots I damage inside this.

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    redfishsc is offline Cadillac Owners Fanatic
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    Re: 2003 DHS; Suspension, ABS, and idle problems, and a stack of codes. Help interpre

    Found a thread on a Vette forum (apparently Vettes share enough genetics with these Caddys that they have similar headaches). I have a suspicion the repair of my car would be quite similar.

    http://forums.corvetteforum.com/c5-t...r-fleabay.html

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    MoistCabbage's Avatar
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    IF the problem is a bad solder joint, you can probably repair it yourself fairly simply. No idea where you'd find a replacement relay if that's the problem.

    The modules aren't particularly prone to failure, buying a used one isn't out of the question. Most salvage yards will warranty parts for a short period, and exchange them for another if they're faulty.
    redfishsc and redfishsc like this.

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    JimD is offline Cadillac Owners Connoisseur
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    Re: 2003 DHS; Suspension, ABS, and idle problems, and a stack of codes. Help interpre

    Quote Originally Posted by redfishsc View Post
    Anyone ever work with these guys? If I end up having to pull this thing off, I may try having them repair it.

    http://www.absfixer.com/catalog/prod...d982os6ujm05q2

    I've read a few posts here and there about folks pulling the EBTCM apart and finding loose solder joints. If this is a possibility, I may give it a shot, as long as regular solder (60/40 or similar) for electronics can be used. I'd also find some non-corrosive silicone to repair any spots I damage inside this.
    It sounds like you are determined to pursue the C1214 code as a priority. Good choice.

    Before I even considered removing the EBTCM for repair or replacement, I would check and double check a critical chassis ground point for corrosion/oxidation/rust or simply plain old broken wires. GM refers to the chassis ground point as G110.

    Remove whatever panels are necessary to gain access to the underside of the EBTCM located at the bottom LF front corner of the powertrain cradle. You will see what is obviously a motor assembly protruding and there will be short black chassis ground wires that run from the case of that motor to a chassis ground point (G110).

    Be certain the wire is not broken and the chassis ground connection is bright/shiny and clean. Use star washers on the chassis ground connection if you even suspect rust or corrosion might be an issue.

    EBTCM internal failure is certainly possible but rare.
    redfishsc and redfishsc like this.

  14. #13
    redfishsc is offline Cadillac Owners Fanatic
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    Re: 2003 DHS; Suspension, ABS, and idle problems, and a stack of codes. Help interpre

    Jim and Cabbage, thanks! Jim, definitely thanks for the advice there and for taking the time to look up that chassis ground point. I will start there.

    I checked today for any possible bad connection with fuses, and all was good.

    Took me longer to uninstall the #!@$%^T$#%@#$Y@#^$%!@#$ car seats for our kids (the latch point harness is nearly impossible to loosen).

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