Bypass is as simple as the D-3's involving moving an unused pin to a certain slot and grounding it along with the parking brake wire. Pioneer learned their lesson last year when the original D-3's were NOT bypassable (that was fixed with a software "update" that they later released in June).

Something I thought was a little quirky though is that the cheaper 700BT has NO vehicle speed sense input. The directions state it is not necessary on that model. The 900BT has it and they state it "MUST" be hooked up. Many shops weren't connecting the VSS wire for years and all manufacturers stated that was a big no-no. All of the sudden-it is no longer needed? The bitch is, the speed display on the 700 BT sucks because it relies on the internal gyrometer so it is delayed by a couple of seconds but on the 900BT it is real-time (due to the traditional hard-wired connection).

On our next 700BT install we are going to insert a pin in the empty VSS slot to see if it fires up that input. Not understanding the logic behind this one...