You need to do the two ground bypass described all over this site if you have an october unit
I installed the 07/06 update with an october z1 but it didn't work
After the install I still got the "parkiong brake improperly connected/installed error screen" and the navi as well as dvd play does not work while the car in motion? please help what should I do
I think that's what he means by the 07/06 update.
http://www.sminntech.com/z1flash.html
The reason you are getting the parking brake message is there is a problem with your connection in connector 2.
You can try resetting the Z1 with the recessed button to the right of the eject button and that will get rid of the parking brake message. Make sure stuff works while parked. If you then start moving and you get locked out again, then it IS the fact that the wire in connector 2 you need to ground is NOT GROUNDED. I don't know what the problem is, but check that wire, you are missing something. Either it's not connected to anything, or you didn't shove the terminal end all the way in, or it's not in the right location... it's one of those.