Before doing either of these functions, you need to tell the system what type of controller you are using and what COM port on the PC to use. The Preferences selection allows you to do that (on the menu under File->Preferences, or by clicking on one of the MEFI or COM buttons on the Upload or Download Pages).

The preferences allow you to select COM1 through COM8 for communications. The MEFI Scan & Tune^TM cable is a USB cable, but it installs as a virtual COM port on your PC. You can also select your controller type. The MEFIburn^TM program can work with MEFI1, MEFI2, MEFI3, and MEFI4 controllers, as well as several variations of each. The Preferences box specifies the part numbers of each controller type to aid in the MEFI type selection.

Once the preferences have been set, Downloading can begin.

Browse to specify the name of a file to save your tune. Tune files can be saved as:

• Binary (the default type)
• PTP (a Motorola S-Record format)
• CAL (an Ingenius Pro file format)
• ASM (an Ingenius Pro file format)
• UMI (an Ingenius Pro file format)

Sometimes, the MEFI controller has been programmed with a password to protect a proprietary tune. The tune will not download properly in this case until the MEFI controller has been unlocked. If this is the case, under Tools -> Unlock Controller, you can enter a password

Once the controller has been unlocked, it will allow free communications until the ignition has been turned off. After that, the controller must be unlocked again. If the password is not available or has been forgotten, there is another more drastic option - you can clear out the controller memory.

This will completely erase any tune in the controller along with any password lock. You can then start with a stock tune and modify it to suit your needs. Of course any password locked custom tune already in the controller will be lost.

After editing the tune, the next step is uploading the tune back into the controller.

Just as with the download function, browse to select the tune on your PC (BIN, PTP, ASM, UMI, or CAL types) and click "Upload Now".

Sometimes you may need to convert a file from one type to another, so we have provided a handy file conversion tool to allow you to move files between BIN, PTP, ASM, UMI, and CAL formats.