There appears to be no audio test possible.
My experience with U-Connect Bluetooth Audio (Jeep)
I tested my connection by playing an MP3 audio file from my phone. Audio worked fine.
My meeting started, no audio. I turned on and off the speaker. It worked from the speaker on the phone, but not bluetooth.
Finally I turned off Bluetooth on the phone and reconnected. This is slow. Took at least two minutes.
Then I had audio. Why is there no audio test? This is not a very good application.