When we had our Avic Z1 installed, the installers told me they placed a hidden switch in place with the parking break connection. I think the switch is grounded so when the switch is on, the Avic thinks the parking break is on. We have most functionallity while driving, although the speed sensor in the unit still "greys out" some screen button while we are moving.

Does this switch do what the bypass does? or does the actual bypass flash do more? Can someone explain the difference and will the current switch affect when I upgrade my unit with the new map data etc. (the most recent update out there?)

Thanks

Thanks. I've seen that and that's why I'm asking if the switch our installers put in does the same thing or not? I can't find any mention of that in the link. Anyone??

Does not.