If a 2014 Camry's backup camera is not working, what should be checked?

There are a few things we can look into to figure out what's happening with Your 2014Camry's backup camera. Let's start with the obvious: are Your backup lights working The switch under the shifter that turns them on also triggers the camera to engage, so You're not going to have camera if those aren't working. It's possible there's a bad connection to the switch, or the camera itself has actually failed --- it happens if it's pretty old. Also, rodents love chewing through wires. Since You have access to it through the trunk, just disconnect the power from the camera, and confirm with a multiMeter that it's properly gettinG6 volts. This really is where You should start when it's not getting any power; if the camera actually has some picture, but with screen distortions, then it's almost certainly a faulty wire. One thing You can try, if You're certain it is getting power, is doing a factory reset on it. There's a small factory reset access located above the switch on the camera; use a pin or paper clip to press and hold that for around 10 seconds.