[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.
- Remove old navigation DVD from the unit.
- Insert supplied navigation DVD and wait for it to initialise.
- If the message "Unable to read data" or "Please insert correct map disc" appears, this means your firmware needs to be updated.
- 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.