I have a 2007 Camry hybrid. Screen say "no DVD map - insert DVD", whether I have the DVD map in or out or if I reinsert the DVD. Other functions such as radio or phone are unavailable because I cannot get rid of that message

check fuse, radio

It is just aft of the last catalytic converter. It is not an O2 sensor, it is a catalyst efficiency monitor.

It is a blown fuse. The fuse box is located under the hood-I believe it is the no. 6 fuse (15A) There should be an extra fuse attached to the back of the fuse box cover along with the fuse puller. The location of the radio fuse is also shown.

when I turn on head light, dash board instrument come off, my Toyota camry 2009 4 cylinders, le.

GO AFTER MAKET CHEAPER TO REPLACE

The ECO HEAT/COOL button of your hybrid functions to reduce the consumption of electricity thus, a reduction of fuel consumption. An indicator 'ECO' appears on the air conditioning display to indicate that the mode is on. Of course, with the ECO HEAT/COOL on it'll take longer than the usual amount of time for the temperature to reach its normal or standard set temperature.

Your ECO HEAT/COOL mode won't function if your temperature control is set at 'LO" or 'HI" or if the air flow is in the "floor/windshield mode" or "windshield mode".

Hope this helps.
-jay

The low voltage accessory battery and high voltage hybrid drive battery are in the trunk area. If hit from behind the hybrid battery may have been damaged. The high voltage battery is the one that actually starts the car. This battery is too high voltage for a normal person to check. Call the dealer so they can get in the shop to fix with the right kind safety procedures.

I think that special mechanic can do this.