Troubleshooting Black Screen on Rear Reversing Camera in Toyota Corolla Verso 2005 - B9002

Hello,
I have a problem with the rear reversing camera in Toyota Corolla Verso. When I engage reverse, a black image appears. Front cameras work fine.
Mainly, I would be interested in a diagram, because it seems to me that the cameras are not directly connected to the radio. If I disconnect all the connectors from the radio, the front and rear cameras, then I have 12V on the connector (in the right post, on the 4 pins going to the rear camera).
Interestingly, I did not have the 4-pin connector marked CAMERA in the drawing connected. And I actually searched carefully to see if the cube had been lost somewhere.

After disconnecting the VIDEO/COMM cube, the front cameras do not work.
The beam from the rear camera to the front right pillar is OK.

Hi
You are 100% sure that your reversing camera is damaged. I had the same problem, but now it's over.

Hello
My friend also has such a radio in his car and his reversing camera stopped working. It turned out that after the car wash, water got into the camera and flooded it.
Is there a 12V output from the radio to the rear camera? Because, my friend, when I measured it, it was 6.5V. Does this mean that I still have to dig into the radio and check what happened there?

The original Toyota camera has a power supply of 6.5 V.
12 V replacements often take power, e.g. from the reverse gear light, and an appropriate resistor is then placed on the power pins in the navigation itself so that the navigation computer thinks that the camera is connected correctly and draws approximately 100-200 mA. Alternatively, you can still power the camera from the navigation power pins through a step-up converter, if the power consumption allows it.