Park assist sound through speakers

Hello friends
Can someone help me please. Apologies once again for posting in English 
I have 2008 pre facelift Mondeo with some of motrals upgrades. I have SD card MCA unit with reverse camera and I have latest park assist module. BS7T-15K866-AE. I have never been able to get parking sensor tones to come through radio speakers. But I have just fitted a facelift convers+ with 1507 software level. Now when sensors start to beep the radio volume lowers, (it never did before) but sound still comes from PAM speakers. If I unplug PAM speakers and put in reverse, beeps come through radio speakers for about 1 second, but then LED in park assist switch starts to flash and park assist shuts down. PAM obviously sees a fault because speakers are disconnected.
I can't see any difference in wiring diagrams and don't know what to try. No settings in elm config, apart from "park scan 1 or 3"
No idea what that means but it doesn't make a difference to the sound
Any help appreciated.


Thank you very much


Gary

Not on facelift they dont. Sound comes from radio spaeakers. Front beeps through front speakers, rear beeps through rear speakers

Maybe a UK thing then? or only with touch screen sat nav? Can anyone else comment?

It maybe is just a UK thing then. I know a few people on Talkford who have fitted non Ford radios have completely lost their beeps because the new radio doesn't support it.

Here are some mentions. Also, like I said, when i disconnected speaker and put in reverse, beeps came briefly from door speaker, before PAM registered a fault

http://www.talkford.com/community/topi…me#entry2104937

http://www.talkford.com/community/topi…arking-sensors/

http://www.talkford.com/community/topi…arking-sensors/