[Hoop4]

Not to be rude, and I'm open to getting humbled but those ports are exactly as they are labeled:
Top is 12V: 12 volt battery power.
Bottom is AUX: Feeds audio signal to your radio.

The AUX jack is notoriously finicky. If AUX is glitchy you can get a new one. I dismantled mine completely and added a switch to activate AUX mode since I had all the supplies laying around to do that.

Knowledge reference: I have a 2007, have taken those parts out, and have rebuilt the AUX port to use w my phone.

 

[Hoop4]

No problems with the Aux on our '11 RAV4 - I plug a personal music player into it and my wife plugs her phone into it as well. Wonder whether the type of radio combo installed in various models makes a difference. We have a Base model RAV4 with value upgrade package, has a radio,etc. OEM upgrade as well but not the JBL premium radio/player.

The problem I'm referring to in the AUX port is that the radio won't detect your aux input so to speak.
In the guts of the AUX ports there is a small switch that trips when a plug is inserted, this small switch is easily prone to failure, especially from dirt or foreign debris.

Here are people having the dead aux jack problem:

AUX Jack Kaput

The AUX function on my 2008 stopped working. What would be the likely reason for this? Is it something I can fix myself or am I relegated to bringing the car to a dealer? Thanks.

www.rav4world.com

2007 Rav4 Aux jack not working

Hello. The aux jack has cut out a lot lately, and now will not work at all. I have disassembled the jack assembly (part number 86190-53010) and I can't find any broken or bad solder joints. My guess is that the jack itself is just totally wore out. Cleaning it has not helped. Replacement for...

www.rav4world.com

Aux jack replacement as a repair:

I took photos of the hoopty Rav4 aux jack mod but havent made a thread yet.

 

[Hoop4]

I'm somewhat a cheapskate and also a tinkerer - I suppose part of my living on farms heritage. With jack socket contact problems I applied a very small amount of solder to each of the pin contacts and that usually resolves the problem. With a vehicle I would get a 3.5 mm male/female 3.5 adapter, use the solder technique on the male end, and leave it always plugged into the RAV4 Aux socket. Then plug the playback, etc. device into the adapter's female socket when needed. Much easier than revamping the OEM Aux port socket - worth a try. If it doesn't work then doctoring the OEM socket probably will be needed.

Having the switch is good to leave the CD functionality, especially if you have and use the multi disc changer. From what I can see, it is disc when the switch isnt tripped and aux when the switch is tripped (plug inserted). I could be wrong and if I found out otherwise I'll try to remember to update this post.

 

[Hoop4]

Thanks for the video! But how did you remove the black plastic panel that holds the MP3 port ? Just pry it out?

It's been a while but I don't remember doing anything special besides prying