Did the previous owner start a nav install then did not complete it? Because what you have [ I think you have a control screen not a nav screen ], Everyone thinks that they are nav screens but they are not. If you are looking to install nav in your RX I have a full system for you. ;)
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This is the screen that I have. It has the nav buttons and everything...When I push the nav button, I have the message "The external system is not connected". On the trunk, right side, below the floor panel, I have four connectors. I used to have the hands free telephone original system (For Motorola) that I removed (volume and other cntrols on the steeering wheel). The hands free hardware used to be connected there.
Check the pictures and tell me what do you think I have. Thanks a lot.
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Can you enlarge the pix a bit, I can't make anything out. Sorry
Or if you can email me larger pix that would work.