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  • 3rd Gen PCM Swapping

    Throughout my planning of my manual swap the one question I never had a definite answer on was swapping the PCM from automatic to the manual one I bought for my 3rd gen. I was first told that you needed the BCM from the car the manual PCM was coming from and then I was told the BCM isn't necessary but it needs to be flashed by the dealer but the dealer won't do it. I was then led to an answer that said yes it is possible and there is a relearn procedure but what it is no one was positive on.

    But here I am telling you that if you are swapping your PCM on your 3rd gen (the S-series with the PCM behind the battery under the hood) that it will work and I have the procedure to do it.

    Now granted you have to have the right PCM for the job. You just can't get go and get any manual PCM, it has to be for the correct engine (SOHC or DOHC) and should have the same options of your car if you don't want to go to the dealer and say, "Hey can you flash this PCM for this this and this?" and want to be charged an hours labor. Evidence shows otherwise that all 3rd gen PCMs are programmed for all options. Simply by doing a relearn procedure allows the options to work on your car.*

    Now before I go over the procedure I'll tell you what my scenario was. I had an automatic DOHC with cruise that I installed and had flashed by the dealer. I have no ABS or traction control and no power anything. I also have the California emissions on my 2000 which wasn't mandated ('01-'02 had it mandatory). I got the manual PCM from a 2002 SC2 with the correct options (yes it will work in your SL2).

    Now the procedure:

    Only for auto to manual swap projects:
    *
    Preliminary notes: You will notice that when you go to put the new PCM into the harness it will not mate properly because the tabs do not line up. Not a big deal. The two tabs that are closer to the passenger side on the harness are not going to line up with the PCM which has the tabs offset. All you need to do to mate the two connectors is to shave off the tabs on the harness. Just be careful not to hit anything else. Then connect the PCM and harness and tighten the screw down. Now your ready.*

    NOTE: DO NOT REMOVE THE KEY DURING THIS AT ALL, or you will have to start the procedure over from the beginning.

    1) Press the clutch pedal in like your going to start the car (if you did this during the swap)
    2) Put the key in the ignition and turn it to CRANK
    3) The car will try to start and then die
    4) Leave the key in the RUN position as if the car started
    5) You will notice on your dash that the "SECURITY" light is now on
    6) Now wait approx. 10 minutes until the SECURITY light goes out (you wait on the light not the time)
    7) When the light goes out turn the key from RUN to the OFF position (keep the key in the ignition) for 5 seconds
    Repeat steps 1-7 two more times for a total of 3 cycles (30 minutes).
    9) When you completed the third cycle you should have the key in the OFF position (per step 7)
    NOTE: On the next ignition cycle the car will actually learn the passcode from the BCM
    10) Push the clutch pedal in and now really start the car and it should start right up and run

    That's all there is to it. A half hour and you're new PCM will be running your car.

    I wrote this up so everyone that can't figure this out or doesn't know the answer to whether it is possible now knows for sure that this is possible and does work.


    Key words for search: 3rd gen PCM swap automatic manual relearn procedure FOB


    *Updated: 12/14/2009
    //// Need valve bodies? Click here \\\\

    2006 Ion Redline w/ Competition Package
    2000 SL2 --- "Secret Purple" - Will be missed -- Last Drive - 8/12/11

  • #2
    Re: 3rd Gen PCM Swapping

    Awesome how to! You just saved me a lot of time this weekend!
    2007 Laser Blue SS/SC non G85
    2011 Subaru Impreza 2.5i

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    • #3
      Re: 3rd Gen PCM Swapping

      shit..i was just going to make this thread..guess im late haha..

      Comment


      • #4
        Re: 3rd Gen PCM Swapping

        I was swapping between 2 automatics of the same year just different motors. I did what you said but the security light only came on once. For the 10 minutes. The second time it didn't stay on. It just light up with the rest of the lights and went off with them too. I haven't started the car yet though.

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        • #5
          Re: 3rd Gen PCM Swapping

          Why would you need the swap PCMs if your using the same transmission and just a different motor? You're talking a DOHC swap then? Otherwise there's no reason to.

          Did you make sure to wait exactly 5 seconds in the OFF position and then try to start the car a second time to do the steps again for round 2?
          //// Need valve bodies? Click here \\\\

          2006 Ion Redline w/ Competition Package
          2000 SL2 --- "Secret Purple" - Will be missed -- Last Drive - 8/12/11

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          • #6
            Re: 3rd Gen PCM Swapping

            wow It actually worked, the manual ECU is def less powerful but it was awesome to see my car actually came with an upshift light(2002 sl2 swapped auto to manual)

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            • #7
              Re: 3rd Gen PCM Swapping

              Nice write up. I could of used this a couple of years ago ha. The dealer charges 200 dollars to reflash the PCM which I didn't know could have been avoided with this procedure.
              02 SC2-Your average saturn<br />97 SC2-The other half of my 02<br />97 SL2-Flipped and stripped<br />95 SL2-Daily with some attitude<br />95 Yamaha FZR 600-Stock except for everything<br />[quote author=Green Monstah link=topic=53693.msg820277#msg820277 date=1253744744]<br />you didn&#39;t waffle, and I didn&#39;t like it.&nbsp; I don&#39;t like your face.&nbsp; your comments suck.&nbsp; you have flat feet and your breath smells of cock.&nbsp; pick one.&nbsp; <br />[/quote]<br /><br />[img width=800 height=179]http://i292.photobucket.com/albums/mm40/saturndriver/SKSTC02-1.jpg[/img]

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              • #8
                Re: 3rd Gen PCM Swapping

                No kidding, i was ecstatic when it fired up, now i can blow that 200 on an underdrive pulley or something else random.

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                • #9
                  Re: 3rd Gen PCM Swapping

                  What happened with mine is my starter lunched itself bad causing the whole electrical system to short out and it tripped the passlock. So I asked around and found out how to reset it like it says in the post. So I did it and I got the security light to shut off. But when I went to start the car it wouldn't even turn over. Got it reflashed and went to the dealer to pick it up. Car wouldn't start!!! Come to find out the starter that I took out of my parts car had a bad solenoid. I felt like an idiot which I was and sometimes still am
                  02 SC2-Your average saturn<br />97 SC2-The other half of my 02<br />97 SL2-Flipped and stripped<br />95 SL2-Daily with some attitude<br />95 Yamaha FZR 600-Stock except for everything<br />[quote author=Green Monstah link=topic=53693.msg820277#msg820277 date=1253744744]<br />you didn&#39;t waffle, and I didn&#39;t like it.&nbsp; I don&#39;t like your face.&nbsp; your comments suck.&nbsp; you have flat feet and your breath smells of cock.&nbsp; pick one.&nbsp; <br />[/quote]<br /><br />[img width=800 height=179]http://i292.photobucket.com/albums/mm40/saturndriver/SKSTC02-1.jpg[/img]

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                  • #10
                    Re: 3rd Gen PCM Swapping

                    I may have spoke too soon, My manual PCM throws a p0300 code, multiple cylinder misfire....my original PCM from my automatic only throws transmission codes(because i swapped the manual into the car). I have been reading online and someone said possible need to have the saturn dealership do a crank re-learn? I def notice a decrease in power, but i just assumed it was cause the auto is advanced slightly. Any ideas?

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                    • #11
                      Re: 3rd Gen PCM Swapping

                      It is possible you need the crank relearn. I don't know why some cars experience this and some don't. Mine didn't have to go through this though I heard there is a procedure to do it yourself. It varies (like when I first was figuring out this) of what is suppose to be done to remedy it yourself. Anything from letting the car warm up and then holding it at 3k RPMs for a couple minutes to driving it normally and waiting for it to disappear.

                      I can tell you the car is not suppose to have less power between the two PCMs.
                      //// Need valve bodies? Click here \\\\

                      2006 Ion Redline w/ Competition Package
                      2000 SL2 --- "Secret Purple" - Will be missed -- Last Drive - 8/12/11

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                      • #12
                        Re: 3rd Gen PCM Swapping

                        Worked excellent for me! I did a complete engine and autotragic swap.
                        Thanks again for the posting.

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                        • #13
                          Put a 99-2000 PCM into my 2002 SC2 because I decieded to switch to the non-precatted 99 Exhaust manifold and ditch the air pump, After doing the PCM learn listed here the car started right up and drives great, But my cruise control is not working now. So it does look like you need a PCM from a car with the same options as yours....ill post if I find out more about this

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                          • #14
                            Originally posted by JeffSnyder View Post
                            Put a 99-2000 PCM into my 2002 SC2 because I decieded to switch to the non-precatted 99 Exhaust manifold and ditch the air pump, After doing the PCM learn listed here the car started right up and drives great, But my cruise control is not working now. So it does look like you need a PCM from a car with the same options as yours....ill post if I find out more about this
                            That would be a '00 PCM, '99 had the earlier electronics system without the BCM.
                            SaturnSeries.net Owner
                            '99 SC2 Project Car build thread

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                            • #15
                              Aww okay, the production date on PCM was in 99 so I wasnt sure

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