jagbagri,
To pick up on this old thread...I was interested in getting video on the front navigation screen from a video ipod. Now that VAIS has their SL2Vi available to do this on the Camry 2007 Hybrid (http://vaistech.com/), I got one and plan on installing it this weekend.

This brings up a new dimension to hacks to unlock the blocked features of the NAV screen. VAIS (as expected for liability reasons) does not override the security systems of the Camry. This means the NAV screen video from the video ipod only works when stopped/parked.

To override/unblock this, it appears from forum searches there are one or two things that have to be done:

1) The speed sensor wire going into the middle of the 5 pins (pin 3) of connector F13 into the back of the NAV unit has to be modified. The name F13 comes from the toyota NAV wiring and troubleshooting diagrams page NS-49, and is the same as R12 in the http://www.oemvalue.com/install07.htm site which is the name used in your backup camera install instructions (which were very useful to me a year ago). From what I read in the forums it will not work just to cut the speed sensor wire, since the NAV unit is smart enough to realize no input is a hack and then reblocks the system as if moving. The solution appears to be to install a speed pulse generator to trick the NAV unit into thinking it is stopped (vs just no signal). Instructions to make one is at http://www.pinemountainfirearms.com/...peedPulse.aspx but I just ordered it for $55 from the guy and waiting for it to come in. You then cut the speed pulse wire going into pin 3 of F13 on the Camry 2007 and bring the NAV side of the wire via an extension wire to the common pole of a SPDT switch (such as radio shack 275-648). The dash/vehicle ECU side of the speed sensor wire that was going into the NAV unit then goes to one pole of the switch. The other pole of the switch gets connected to the speed pulse generator unit you can get for $55 (of build for $20 if you are willing to). Once you install the switch in a convenient place, it can then switch between factory setting vs unblocked via speed pulse generator. There is a detailed forum thread on this approach at http://www.tundrasolutions.com/forum...ions-all-time/

2. Some forum sites say the parking brake has to be grounded to get video to play on the NAV while moving. The speed sensor injector device guy thinks this is not needed (but he has a Toyota truck, not a camry hybrid). Has anyone done this hack yet on the Camry hybrid 2007 who can tell me if both are needed or just #1? If this is also needed, what wire going into the NAV on which connector has to be interrupted?

Would appreciate any install tips from people who have done this already
Joe