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Thread: SBEC Electronic schematic/flowchart/logic diagrams

  1. #1
    Hybrid booster
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    SBEC Electronic schematic/flowchart/logic diagrams

    Greetings,

    Where would the conversation for component level repair of an SBEC start?

    All the CLR I do at work I have prints to work off of and it hasn't been until recent that I've run into bad computers. I now have 2 SBEC's with 2 separate faults that I feel are very repairable.

    1 SBEC isn't latching the ASD relay signal (output) and second is a voltage regulator and another weird code.

    I've heard a lot of conversations have moved on to facebook so I'll try there as well once I get an account going.

    I'll just do it the hard reverse hackerway and report my findings if those documents haven't leaked out from the factory.

    Thanks in advance.

    Rosie
    San Diego

  2. #2
    turbo addict
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    Re: SBEC Electronic schematic/flowchart/logic diagrams

    https://www.youtube.com/watch?v=UKZ7jFrlrMs


    https://www.youtube.com/watch?v=Xz6y5NVgl8k

    some of the people on you tube from mexico seem to have schematics.
    1988 Lancer Shelby 2.2TII 1989 Shadow ES 2.5TI 1992 Lebaron Sedan 3.0Auto 1993 Acclaim 2.5TI-A520 Hoard parts now!

  3. #3
    Hybrid booster
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    Re: SBEC Electronic schematic/flowchart/logic diagrams

    Thanks for the reply but the search continues then.

    Same question, anyone have the schematics?

  4. #4
    Supporting Member II Turbo Mopar Contributor
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    Re: SBEC Electronic schematic/flowchart/logic diagrams

    Quote Originally Posted by rosie View Post
    Thanks for the reply but the search continues then.

    Same question, anyone have the schematics?
    I have pseudo schematics for the 87 LM which will give you an idea of what goes on in the SBEC.
    https://drive.google.com/open?id=0B3...FlnampwazNzYXM

    I have Reversed Engineered the functionality of the main functions of the SBEC2 but I have not fully documented this. I hope to document this in the fall.

    The alternator control driver is on the right side of the driver bank and the one towards the 60 way. It will be a challenge to change as it is on the inside of the banks. The part is usually labelled with a special Cryco part number so it is difficult to determine exactly what the component is. I assume some sort of MOSFET as the pins are labelled GDS. I plan to desolder one and test out of circuit but that will be a winter project. I am working on getting copies of the schematics but the person is having difficulty finding them at the moment.
    For SBEC2 the ALT driver is Q071.
    http://www.turbo-mopar.com/forums/sh...winter-project
    Last edited by chromguy; 08-20-2019 at 09:14 AM.
    Regards,
    Miles

    DD '87 Sundance T1, 12PSI, SLH with rear disks
    '87 CSX #432

  5. #5
    Hybrid booster
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    Re: SBEC Electronic schematic/flowchart/logic diagrams

    Thanks for the reply @chromguy
    I've also got a computer code and an inop ASD signal. 2 different SBECs. I'll start a thread eventually.
    Figured the voltage regulator would be the easiest path to the guys who are doing component level repair.

    Hopefully I'M retreading ground someone else has done (and I find it) because I suck at reverse engineering.

    The search continues!

  6. #6
    Supporting Member II Turbo Mopar Contributor
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    Re: SBEC Electronic schematic/flowchart/logic diagrams

    Quote Originally Posted by rosie View Post
    ... because I suck at reverse engineering.

    The search continues!
    reverse engineering is difficult and slow for everybody. When you find info please share.
    Regards,
    Miles

    DD '87 Sundance T1, 12PSI, SLH with rear disks
    '87 CSX #432

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