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Perform these steps:
1. Turn on engine (or key to position II)
2. Push the MENU button, then select SETTINGS menu.
3. Push and hold the MENU button while in the SETTINGS screen for about 5-10 seconds. The SERVICE MODE menu will appear. Let go the MENU button.
4. Select ONBOARD COMPUTER menu.
The SW version will show you what NAV version you have. Let me know what you have and we'll see if you are compatible or not.
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