LS430 2003 w/nav. My nav is not getting a gps signal. I am still able to plan a route, but the system doesn't know where it is. I suspect it's one of two issues. The cable from the gps antenna, which is located directly under the center dash, is out, or the cable connecting it to the nav is disconnected.

I would like to check it, but I have read that once the nav unitl is removed, it
requires special tools to re-install. Nothing more specific than that.

I am familiar with the center console since I replaced the single din radio with a 2din.

Can anyone give me guidance on this problem?
Thanks