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How ScreenTune Builds, Installs, and Reverts

ScreenTune is a custom USB package for a compatible Gen 6 Mazda Connect unit running v74.00.324. The download option requires a computer only to copy the supplied files to a clean FAT32 USB drive. The mailed option arrives on a tested drive. Neither option requires a desktop application.

The CMU does not connect to a Miatafy server during installation. The package, configuration, installer, and required assets are already on the USB drive.

The intake defines one complete configuration

Section titled “The intake defines one complete configuration”

Miatafy reviews the vehicle, firmware, wireless CarPlay use, and factory features before preparing the package. Uncertain factory hardware stays enabled. ScreenTune features and options defines the customer-facing scope.

The installer verifies the CMU before writing

Section titled “The installer verifies the CMU before writing”

Wait for the Mazda Connect home screen, insert the USB drive, and choose the offered action. A modifying action does not begin until the installer confirms the exact firmware and displays the on-screen prompt.

An unsupported firmware result stops before ScreenTune remounts or changes the system files. Current customer packages modify only recognized v74.00.324 builds.

One transaction applies the complete package

Section titled “One transaction applies the complete package”

For an installation, update, or repair, the installer:

  1. verifies the package and target firmware;
  2. restores ScreenTune’s saved baseline when updating or repairing;
  3. records checksummed first-install backups for every managed factory file;
  4. applies the complete resolved configuration;
  5. records the installed version and configuration only after every change succeeds; and
  6. reboots Mazda Connect.

The installer does not stack a second copy of ScreenTune over the first one. UPDATE and REPAIR return to the saved baseline, then apply the complete package on the USB drive.

If a modifying step fails, the installer attempts to restore the saved baseline before rebooting. The USB log records the phase and error for support.

REMOVE restores the first saved baseline

Section titled “REMOVE restores the first saved baseline”

REMOVE restores the managed files captured during the first ScreenTune installation and removes active ScreenTune runtime files. That baseline represents the CMU as ScreenTune first found it. It is factory state only when the unit was stock at first installation.

A full firmware reinstall is the deeper recovery path when normal removal cannot complete. Miatafy does not distribute Mazda firmware. See Install, update, and remove for the in-car actions and Backup and recovery for the recovery hierarchy.