F900BT switches off only after a few seconds and adjusts the last station

[Outi]

Hi,

when I turn off the engine and remove the key, the radio turns off correctly, but only after 2 to 3 seconds.
During this time, I see that the radio starts a station search and then turns off after a few seconds.
This means that the next time I start the engine, no station is played, or a different station is played.
The permanent positive and ignition positive are connected correctly, but where does this residual voltage come from that causes the radio to start searching new stations?
This Searching is at power off, not at power on (as like wrong wired positive). 

Any ideas?

Regards
Outi
 

[RonS]

4 hours ago, Outi said:

Any ideas?

I don't have an F900BT, so I'll just try to clarify your issue. I've never heard of this problem before.

Is this a new installation? If not, has it always done this or is it a recent problem?

What model car is it? Have you verified with a voltmeter that the "switched" +12V shuts off immediately when the ignition is off? I have seen some vehicles that leave accessories' circuits on for some time after the ignition is off.  It may behave differently when the door is open.

 

[Outi]

Thanks for your informations.

I upgraded the F900BT to the latest firmware 4001.0000 but I dont´t know, how it was before (I updated short time after car purchase).
The car is a Suzuki Swift III (2008).
I will measure more precisely according to your suggestion.

By the way, today I noticed that when playing music from an SD card, the song and volume changed when the ignition was turned off before the radio turned off.

Thx and regards
Outi
 

[RonS]

It does not sound like a firmware issue. My best guess is a problem with the installation. If you don't have the manual, download it here: https://pdf.crutchfieldonline.com/ImageBank/v20090112143700/Manuals/130/130AVICF90.PDF