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1993 Saturn SC2 Question: PCM death due to ABS?

 

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SC2, Victor, NY, December 20, 2010, 15:48
 Rookie

Have you ever seen a PCM damaged by ABS or other solenoid in the car. I have a 93 saturn SC2 that blows the 5 volt fuse on PCM B location. Computer won't give any check engine lights assumption is (dead PCM). The ABS brake system is empty due to brake line rust through. I just bought the replacement computer and the instructions say check all solenoids. Do I fix or unplug the ABS before installing the computer? inital problem was will not crank. I have tested the fuel pump it works correctly.

Thanks,SC2

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  • Answer #1

    December 21, 2010, 16:21
    Profile_thumbnail
     Master

    there are soloniods on the computer side that need to be checked. its a lot more than just replacing the pcm. luckily, you dont need a flash to make your replacement pcm work. they should have provided a wring diagraphm that shows which terminals in the hearness need to be checked with the values needed before installing the pcm.
    follow the directions carefully and take your time.

    Roy

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    SC2, December 22, 2010, 11:22
     Rookie

    The cardon unit i bought below does not provide the step by step wire harness check that you suggsted. I did review the following technical updates on the www.Cardon.com site.
    Defective OE conformal coating is removed from the entire ECM board, including underneath the chips, and is replaced with upgraded conformal coating. - Corrects an O.E. design flaw and ensures chips will not lift from the board, causing the unit to fail.
    Tech Bulletins
    Application-Specific Tech Bulletins
    Vehicle Will Not Start After Reprogrammed Instrument Panel Cluster (IPC) Has Been Installed.
    Supplemental Tech Bulletins
    Relearn Procedures Specific to the Vehicle Application MUST Be Followed After Installing a Reprogrammed ECC.
    Engine Control Computer Basics
    ECM's Rarely Fail By Themselves
    Poor Drivability and Performance After Replacement of Electronic Control Computer (I.e. Hard Start, Stumble, Stalling, etc)
    Constant or Intermittent Engine Light w/No Codes Stored (GM), Stalling w/No Codes Set (All Makes), Check Engine Light Goes Out When Assessing Codes (GM), Various Drivability Problems (All Makes)
    10 Step Driveability Test
    Drivability Problems Continue After ECM Replacement.
    The Number of Connector Pins on the Original ECC and the Cardone Replacement Unit Do Not Match.

    for this unit.

    Cardone Reman/Engine Control Computer Part Number:
    77-1857
    Price:$215.99

    I will keep searching for the step by step solenoid and relay check before I install the computer. Thank you for the input. SC2

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    Visitor, December 22, 2010, 11:25

    good luck

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