QA Questions › Category: Head Unit Question › Re-activation of camera in head unit 1 Vote Up Vote Down Manuel asked 2 years ago when I buy a unit with deactivated rear view camera can I activate it later when I install a camera? 1 Answers 0 Vote Up Vote Down Ddren Staff answered 2 years ago Hi Yes. You need to use OBD11 or VCDS to activate or deactivate the backup camera.