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[HOW TO] Toyota/Lexus TNS600/TNS700 Navigation & Firmware Update

This is a tutorial on how to update the firmware version and map version on Toyota/Lexus TNS600/TNS700 systems.

  1. Remove old navigation DVD from the unit.
  2. Insert supplied navigation DVD and wait for it to initialise.
  3. If the message "Unable to read data" or "Please insert correct map disc" appears, this means your firmware needs to be updated.
  4. To force the firmware update please disconnect the car battery via the Negative (-) terminal for 10 seconds. When the battery is reconnected the firmware will update automatically and the navigation will be up and running.

 

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