fio316a

Hello everyone. I'm new to this forum. I installed an AVIC-D1 into my Toyota 4Runner and just realized that I'm having a problem with it. I'm wondering if anyone else has had this issue. The unit will not turn off if the source is on AM or FM and the key is taken out of the ignition. If the source is CD and I take the key out, the unit shuts off. Does anyone have any ideas? Any help would be appreciated.