Audio-Navigation Unit and HDD Replacement Troubleshooting

To protect client information and data from theft, the audio-navigation unit and the HDD have a passcode that prevents the HDD from being accessed by any audio-navigation unit When the HDD is first installed in an audio-navigation unit, and the ignition switch to ON (II), or press the engine start/stop button to select the ON mode, the HDD writes the passcode from the audio-navigation unit to its memory, which is also known as mating Every time the ignition switch to ON (II), or press the engine start/stop button to select the ON mode, the audio-navigation unit and HDD confirm the passcode against the other component If the audio-navigation unit has a different passcode than the HDD, the audio-navigation unit cannot access the HDD

When you order a new audio-navigation unit, it arrives able to mate one time to a new or previously mated HDD When you mate the two components, the new audio-navigation unit overwrites the HDD's original passcode with the new one If you try to install the HDD back into the original audio-navigation unit, the passcode is different, and the audio-navigation unit cannot mate to the HDD

When you order a new HDD, it arrives able to mate to a new or a previously mated audio-navigation unit Once the HDD is mated, it then can only mate with a new audio-navigation unit

For more information, refer to AUDIO-NAVIGATION UNIT AND HDD SERVICE PRECAUTIONS  The outline of the audio-navigation unit and the HDD replacement and substitution is shown in the following table