Obdi or obdii ?
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  • 1 Post By jamespowers
RWD 19xx-1984 DeVille and Fleetwood,
1985-1996 Fleetwood and Brougham Forum Discussion, Obdi or obdii ? in Past Cadillac Vehicle Discussion; just something i was thinking lastnite,i got a 96 fleetwood, i had changed out my pcm/ccm out of a 94 ...
  1. #1
    85 FLEETWOOD COUPE's Avatar
    85 FLEETWOOD COUPE is offline Cadillac Owners Fanatic
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    Obdi or obdii ?

    just something i was thinking lastnite,i got a 96 fleetwood, i had changed out my pcm/ccm out of a 94 fleetwood, so would i ave to use the obdII still bacause its a 96 or do i use the obdI because i switched stuff out from a 94 witch is a obdI????

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    turbojimmy's Avatar
    turbojimmy is offline Cadillac Owners Connoisseur
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    Re: Obdi or obdii ?

    So you put a '94 PCM in a '96 Fleetwood? And it works?

  4. #3
    85 FLEETWOOD COUPE's Avatar
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    Re: Obdi or obdii ?

    Well i had the 1 under the hood flashed before installing in the 96, should i have keep the 1 in the trunk the 96 1 or leave the 94 in there? The car runs, i had my steering column out the 94 to

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    jayoldschool's Avatar
    jayoldschool is offline GM RWD V8 addict
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    Re: Obdi or obdii ?

    The 96 OBD2 PCM is a completly different part number than the 8051 OBD1 PCM used in the 94-95 B/D cars. You need a 96 PCM.

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    85 FLEETWOOD COUPE's Avatar
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    Re: Obdi or obdii ?

    So you saying if i used the obdii it wont show correct codes? But i flashed the pcm shouldnt that matter????

    ----------

    But some 1 told me if i used the pcm and the ccm it would work on my 96

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    Re: Obdi or obdii ?

    The OBD1 PCM is different, even if flashed. It uses a different chip set, and looks for different resistance on the knock sensors. You need a 96 PCM in a 96 (and a 94/5 in a 94/5).

    People will tell you lots of things. If a guy tells you he's Batman... it might even be true.

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    jamespowers is offline Cadillac Owners Enthusiast
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    Re: Obdi or obdii ?

    Quote Originally Posted by jayoldschool View Post
    People will tell you lots of things. If a guy tells you he's Batman... it might even be true.
    I am Batman.
    nebulosity likes this.

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    cadillac kevin's Avatar
    cadillac kevin is offline Cadillac Owners Master
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    Quote Originally Posted by jamespowers
    I am Batman.
    No, I'm batman. We've never been seen in the same room together. Coincidence? I think not!

  10. #9
    silverfox103's Avatar
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    Re: Obdi or obdii ?

    I agree with Jay, it makes no sense to do that. The 96 is made to run on an OBDII.

    Tom C.

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    jamespowers is offline Cadillac Owners Enthusiast
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    Re: Obdi or obdii ?

    Quote Originally Posted by cadillac kevin View Post
    No, I'm batman. We've never been seen in the same room together. Coincidence? I think not!
    No I am Batman. I have been seen in the same room as Batman---because I was smart enough to use Alfred as a decoy.

  12. #11
    85 FLEETWOOD COUPE's Avatar
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    Re: Obdi or obdii ?

    Im sorry it is a 96 pcm i just had it flashed,the ccm is a 94 along with the steering column i had installed would that matter or should i plug up back the 96 ccm in the trunk?

    ----------

    This guy told me to use the ccm because i was going to use the 94 steering column with the 94 original key,does this makes sense to you guys, i had to bypass the column but it starts up

  13. #12
    turbojimmy's Avatar
    turbojimmy is offline Cadillac Owners Connoisseur
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    Re: Obdi or obdii ?

    That makes more sense. I *think* the CCM is the same. If you've bypassed the PASS KEY system, and it works, why mess with the CCM now?

  14. #13
    85 FLEETWOOD COUPE's Avatar
    85 FLEETWOOD COUPE is offline Cadillac Owners Fanatic
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    Re: Obdi or obdii ?

    I did everthing at 1 time, i did the ccm becaus i thought the 94 original key would read it and would start

  15. #14
    85 FLEETWOOD COUPE's Avatar
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    Re: Obdi or obdii ?

    So now my question is would the obdii reader still read if it had the 94 ccm in the trunk or dont matter?

  16. #15
    turbojimmy's Avatar
    turbojimmy is offline Cadillac Owners Connoisseur
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    Re: Obdi or obdii ?

    It doesn't matter. Only OBD-II powertrain codes are reported on the '96 and accessed via the OBD-II port. Body codes are the old style, like on the earlier years and can be accessed through the HVAC module.

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