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    How to use the multimap tool

    Add map switching to a full ECU read. The file is locked to the VIN stored in the ECU.

    The multimap tool (mapswitch) writes several calibrations into one ECU file so the driver can switch maps while driving. It needs a full read of the ECU, not calibration data alone. After you pay, you flash the file with your own tool and edit the calibrations in WinOLS. What mapswitch is, and how the driver switches, is covered on the mapswitch page. Start with the EDC15 tool or the MED9.1 tool.

    The VIN has to be the one in the ECU

    Read the VIN from the engine controller, not from the plate on the car. If the ECU was replaced, the two numbers can differ. You cannot change the VIN after payment, and a file built from the wrong one will not run. A file that is not a full read cannot be processed and is not refunded.

    What is a full file?

    A full file contains the ECU's application software and its calibration data. Calibration-only reads, and virtual reads that omit the code area, do not work. Bflash can deliver a full file over OBD. Flex, Kess and CMD Flash usually need a bench or boot read for the same file. Accepted extensions include .bdc and .bin.

    1. 1. Select your ECU

      Open the tool and choose the ECU family, then the variant. EDC15 and MED9 are under Multimap. MED17, MG1 and ME17 are under the advanced tools.

    2. 2. Upload a full read

      Upload the stock file. A full read contains the application software and the calibration. A calibration-only file is rejected, and a file that is not a full read is not refundable. Bflash can provide a full file over OBD. Other tools need a bench or boot read.

    3. 3. Enter the ECU VIN

      Enter the 17-character VIN stored in the ECU, not the VIN on the car's body tag. A replacement ECU can hold a different VIN. The file is locked to this VIN and cannot be changed after you pay.

    4. 4. Choose the number of map slots

      Pick how many maps the file should hold. The tool offers up to 8 slots, depending on the ECU and the package. Map 1 should stay the stock calibration.

    5. 5. Choose how the driver switches maps

      Brake and accelerator, or the cruise-control stalk. Cruise control is required for antilag and quick toggle. Some ECUs only support one method.

    6. 6. Save the selected slot, if you want it remembered

      With save-slot on, the ECU keeps the last map after a key cycle. Without it, the car returns to map 1.

    7. 7. Choose the maps

      For CSV-based ECUs, export the map list from WinOLS and upload it, or enter each map's start address and its X and Y axis. For multi-file ECUs, upload one finished calibration file per slot.

    8. 8. Set antilag or quick toggle

      Mark the slots that should use antilag or quick toggle. Quick toggle is held only while the cruise button is held.

    9. 9. Verify your email

      Enter your email, send the one-time code, and enter the code before payment.

    10. 10. Pay and download

      Accept the terms and pay. The finished file is emailed when it is ready. Take a full ECU backup before you flash it. Checksum and write the file with your own flashing tool.

    Before you flash

    • Check every field. Incorrect data is not refunded.
    • The VIN cannot be changed after payment.
    • Keep a full backup of the ECU before writing the file.
    • You checksum and write the file. Flashing-tool support is with the tool's maker.

    Questions about an order: [email protected].