I just completed a bypass of my D1 unit by using the A-Ant lead and moving it over then grounding it. The bypass worked perfect, however, my FM reception is no longer as good as it was and I get no AM reception at all. I was assuming that the lead was for a "automatic antenna" Do 4runners use the wire to for some sort of amplified antenna? Thanks.

It's more than likely. If you tie the blue/white wire from the avic to the blue wire of the wire harness that I'm hoping you used, that will take care of your radio reception issues.

Thanks for the help. Yes I used the solid blue wire and moved it in the harness to the open spot and grounded the end. Are you saying to tap into the blue/white wire with the remaining end of the blue wire that goes into the factory wiring?

Yup That would be it.