1991 Chrysler Imperial Engine Controller No Start Condition

Discussion in 'General Motoring' started by William R. Messick, Apr 17, 2004.

  1. I guess I should start at the beginning; I was driving the car when the
    engine shut down. When this happened, I checked the dash and the alarm
    light was on (solid not flashing). Several attempts to start the car failed
    and I had it towed. I have attempted to check the engine controller and I
    cannot get it to got in diagnosis mode. I am using the prescribed method in
    the factory service manual. I cannot get it to work at all (will not even
    flash 55). As a last effort, I have disconnected the car battery and
    allowed the vehicle to sit for a day with no results. I have also removed
    the instrument cluster to check the bulb that light the "check engine"
    light. The service manual describes a "no start" condition if the alarm
    module is removed and the car is not running. I believe that this is the
    case.

    Is there any other method short of having the car towed to the dealer to
    diagnosis/reset the engine controller?

    Has any one else experience this problem.

    I already have a obdII tool for my jeep, will an obdI reset the computer and
    solve the "no start condition"?

    Any and all help is GREATLY APPRECIATED!!!

    Thanks

    Bill Messick
     
    William R. Messick, Apr 17, 2004
    #1
  2. William R. Messick

    Neil Nelson Guest

    Which is described as?
    With he battery connected, the ignition switched on and he engine
    not running, does the check engine light illuminate?
    There is a known history of Chrysler SBECs suddenly deciding that
    they are in anti-theft mode, so you may be correct but you should
    still be able to pull trouble codes.
    Depends on how you answer my second question (does the CE light
    come on?).
    No. Your 91 system is definitely not OBD2.
     
    Neil Nelson, Apr 17, 2004
    #2
  3. NO SIR
     
    William R. Messick, Apr 18, 2004
    #3
  4. William R. Messick

    Bill Messick Guest

    Also, what scan tool would be the best to read the codes?

    Thanks again

    Bill Messick
     
    Bill Messick, Apr 18, 2004
    #4
  5. William R. Messick

    Neil Nelson Guest

    The fact that you have no check engine light at all suggests that
    the computer isn't powering up , anti-theft mode is characterized
    as a start then a stall within one or two seconds but it doesn't
    usually effect the ability to extract codes or keep the CE light
    from coming on when it should.

    I'd be checking all battery, ignition and ground circuits to the
    SBEC. You could also have a sensor shorting out and pulling the
    system down, you can try disconnecting all the sensors and then
    see if the CE light comes back with the key on engine not running.
     
    Neil Nelson, Apr 18, 2004
    #5
  6. William R. Messick

    Neil Nelson Guest

    Also, what scan tool would be the best to read the codes?[/QUOTE]

    The DRB from that era would be the obvious choice since its use
    would allow that the factory troubleshooting procedures be
    followed exactly.
    Their isn't anything about this system that would lead me to
    believe that the Snap-On MT-2500 or an OTC 4000 couldn't also be
    used, but...
    I don't think a scan tool is going to get you very far other than
    the realization that the scan tool can't communicate with the
    data stream because the system isn't waking up as it should.
     
    Neil Nelson, Apr 18, 2004
    #6
  7. William R. Messick

    Bill Messick Guest


    I will check that today, it makes sense that the sbec is not getting
    power because of the CE light not working. By chance is there a
    fuseable link or fuse that protects the module from shorting out?
     
    Bill Messick, Apr 20, 2004
    #7
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