I purchased a avic f90bt in may and had the 2.0 update and I bypassed the unit by switching the mute wire and grounding it. It worked perfect. However I just received the unit(no wiring harnesses were sent off ) back from Pioneer Elec. For software problems. They updated the software to the 2.006 and now the bypass doesn't work any longer. Nothing changed besides the firmware. Can anyone help me find a new bypass? Thanks

I just installed my F90BT 2 days ago (software version 2.0, says on the box). I hooked up VSS and Reverse wires, but GROUNDED the parking brake wire. I Did not use the mute wire, I think i'm going to put a switch on the dash for the mute wire, so I can RAPIDLY mute the radio...pushing in the joystick button is rather slow for me.

Anyway.....I can watch DVD, and can fully access the NAV, I get a one-time nag screen saying the parking brake is not hooked up correctly as I get up to speed.

I don't know where you actually read the software version from the unit itself.

it also possible to take another pin such as system remote controle (amp turn on) and move it (it is possible to change antenna control to do the same job as amp turn on) or a pin from an RCA connector that you are not using, or even just a piece of 18 awg wire strip off a little bit fold it over its self and stick it in and use a zip tie to hold it in with the next wire