2015 Cali T rear sensors not making noise

Good morning all, I am new to Ferrari but know there is a lot of information here. I purchased a 2015 Certified Cali T last year and have put about 1300 miles on it . I just took to dealer for oil change in Mass ($1035 oil and filter only , really? Common) when the car was done they told me rear sensors don’t appear to be working . They do light up green, yellow , etc but no noise . I asked if it’s covered under Power 15 warranty and they didn’t know , said bring car back leave it for a few days ( about 1.5 hours each way drive ) they will check it send info to Italy and if it’s covered I don’t have to pay the $265 for them to put analyzer on it . I have seen different posts but nothing were lights work but no noise . Is this one of those disconnect battery , put windows half way down , turn around 3 times on 1 foot , wait 10 minutes re-connect battery things does anyone know ? Before I have to leave car sitting at dealer for a week and 6 hours of driving figured I would ask the group. Personally between the notification on dash and rear view camera not sure why I need the noise just want everything to work as designed. Thank you

 

thanks so much , I have to assume the sound was working for Ferrari to certify car last May. Quite frankly never noticed because it has front sensors as well and they go off when pulling out of garage . Do you think this is something I can fix DIY without pulling much apart or a dealer repair ? Thank you very much for the quick response . Bob

 

Yea I am beginning to think you are spot on there.

 

is the speaker and or wire visible from the Trunk do you know? I found a video on you tube and looks like took the whole bumper off . To me the noise isn’t important enough to do that unless it’s covered under the Ferrari Power 15 which the dealer didn’t know ( odd to me ) . Between the lights on the dash for the rear sensor working and the rear camera I am pretty comfortable as opposed to pulling off bumper . Your thoughts ?

 

No worries thank you . I agree with the PITA statement . If its covered under bbn power 15 fine. If not dont care that much.

 

just a follow up for you , took to local shop that works on these things . Anyway they diagnosed everything such as modules etc is fine and they are checking wiring diagram to see repair of speaker . I haven’t heard back yet but I am reluctant to start removing interior panels of leather I the car to hear the noise since have camera and they light up . Do you have an opinion here or info as to what needs to be removed to get at this ? 260k car and speaker not working 13k miles , 2015 Acura RDX 30k and every other car I have owner never had speaker failure . Love the car but omg . Thanks Bob

 

Thank you so much for such a detailed explanation . I just got car back after diagnosis I am going to try and attach the write up here but short version is they came to conclusion as you as far as it being speaker related ($400 latter of course ) they explained the need to remove top of trunk area where roll over bars are to get at the speaker as far as if it’s a wire or the speaker . I am not inclined to have the car pulled apart like that since the rear camera and indicator lights are working fine but I like your alternate suggestion and will look into that . I can’t thank you enough for taking the time to offer such a detailed explanation and suggestion . Thank you again Bob

 

you are the best , great idea . I see these little speakers on eBay for about $65 bucks. Can’t thank you enough . Bob

 

I am sorry to bother you again and promise this is my last time on this topic . Probubly a stupid question but can you tell me where the ECU is located on the 15 cali and what it looks like by chance . If not no worries you have already been immensely helpful . If ever in RI I owe you big time . Thanks Bob