You can try resetting the whole car, disconnect a battery terminal and turn the key. For some reason there is no factory default setting, my infiniti with the same AV does have one.
This will allow you to enter the diagnostic menu, but be careful as some have managed to disable the whole system...
• Press the “BACK” switch and the “UP” switch of the 8-direction switches within 10 seconds after turning the
ignition switch from OFF to ACC and hold them for 3 seconds or more. Then the buzzer sounds, all indicators
of the preset switch illuminate, and the self-diagnosis mode starts.