Roland@pcmtec Posted February 25, 2021 Share Posted February 25, 2021 Problem: You need to change the serial within a Custom OS file due to a failed PCM. As the Serial and VIN are embedded within the Custom OS the firmware they cannot be changed using the normal methods and the Custom OS file must be be recreated. Solution: We create a new stock file and re-run the Custom OS Wizard via the following steps: The guide assumes your previous Custom OS file has been named as "Previous Custom OS.tec" This guide will require that you fully relicense the new file as part of the steps. If this is a Multi Tune it will require 10 more credits. We can refund these credits AFTER the process has been completed by contacting support. If the previous Custom OS license is refunded/deleted prior to completing this process the procedure will not work. Firstly we must read the new PCM and save it as "New PCM.tec" DO NOT LICENSE THE FILE. Close the file. Press Calibration Tools -> Create Stock File/Calibration Merge Select "Create Stock File From Existing File" then load your previous custom OS tec file. Press "Save/Open File" and save the file as "New Stock File with old serial.tec" Press "Compare/History" -> "Load Compare File" and load the previous Custom OS file that you are recreating ("Previous Custom OS.tec") Click anywhere within the compare tree view then select all items via Ctrl + A then pressing space. Once selected press "Apply" to copy the values over to the stock file. Now we must change the serial to that of the new PCM. Save the file as "Stock OS with values copied and old serial.tec" Close the file. Ensure you have a read of the new PCM saved as "New PCM.tec" DO NOT LICENSE the new PCM yet. Close any open files. Open Calibration Tools -> "Create Stock File/Calibration Merge" Select "Manually Merge VID/Serial" Press "Load File 1" and select "Stock OS with values copied and old serial.tec" Press "Load File 2" and select "New PCM.tec" Press "Import PCM Serial from File 2" Press "Save File 1" and save as "Old PCM with new PCM Serial.tec" Open "Old PCM with new PCM Serial.tec" License the file. Step 2: Create the Custom OS Select "Calibration Tools" -> "Custom OS Configuration Wizard" Press "Load All Defaults From Existing File" from the bottom left hand corner and select the original Custom OS file that you are recreating "Previous Custom OS.tec" The wizard will now replicate your previous file. Review these settings to make sure they are what you expect. Press Next and review the next page (depending on what type of custom OS you created you may not see all of these page or options). If you are recreating a Flex/Multi Tune you will now see the table selection page. The tune and table setup should match the previous Custom OS. Review the table/scalar setup to ensure it matches what you had previously. Press "Check License and Proceed" and save the new file as "Custom OS re-created with stock values.tec" Press Next and exit the Custom OS Wizard. Now press Compare/History -> Load Compare File and load the previous Custom OS File. "Previous Custom OS.tec" This is the same process and steps as you did earlier in the guide and will copy over the flex/multi tune tables. Once again click anywhere within the compare tree view, press Ctrl + A then space to select all of the previous Custom OS tables/scalars. Finally press Apply to copy them over. You will now have a freshly created Custom OS with a different VIN number. Press File - Save As and save the file as "New Custom OS with new VIN and all values.tec" Flash the file into the vehicle. Please contact support via https://www.pcmtec.com/contactus and we will manually refund the credits required to relicense the replacement PCM, please include the VIN, vehicle type and what failed on the PCM. Please note that for new customers we may ask for proof of the PCM replacement as this process could be abused. Finally follow step 7 from the generic PCM replacement guide: Quote Link to comment Share on other sites More sharing options...
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