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1999 Chevrolet Lumina – PCM Computer Replacement

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  • #560761
    fredsmythsonfredsmythson
    Participant

      I just bought a used computer (PCM) for may 1999 Chevrolet Lumina 3.1. I’m trying to solve a knock sensor trouble code and now it’s time to replace the computer.

      The replacement computer has been updated with new software and the car’s VIN, and it’s ready to install. But, I guess there is an issue when installing a replacement computer that relates to the crankshaft positioning sensor. There is a “learn” procedure to do after the replacement computer is installed. The procedure is called “CRANKSHAFT POSITION (CKP) SYSTEM VARIATION LEARN PROCEDURE.”

      My question is whether I’ll need a special scan tool to tell the computer to start this learn procedure, or can I install the replacement computer without using the scan tool? Thanks…

    Viewing 5 replies - 1 through 5 (of 5 total)
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    • #560909
      Kevin CriswellKevin Criswell
      Participant

        here you go Fred

        And yes you will need a bi-directional scan tool to preform the relearn.

        Attachments:
        #560993
        fredsmythsonfredsmythson
        Participant

          Thanks for the info sheet!

          Do you have any recommendations on an inexpensive scan tool or software that has the re-learn feature?

          #561002
          Kevin CriswellKevin Criswell
          Participant

            Not sure, I will do some looking and see. If you happen to live in Middle Tn I might be able to help ya.

            #561011
            fredsmythsonfredsmythson
            Participant

              They do have some bidirectional scan tools on Amazon and Ebay, but do these have the relearn feature for the PCM??? Some of the descriptions about the scan tools just don’t give enough information about their features and what they can actually do.

              I do have an ELM327 cable for my computer, so I was also looking for some bidirectional scan tool software that might work…

              #563364
              fredsmythsonfredsmythson
              Participant

                I installed the replacement PCM computer and there were no additional error codes after the installation. The engine seems to idle better with the replacement computer, but it did not resolve the issue of the P0327 code… :S The troubleshooting continues…

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