ARE YOUR SWITCHES IN THE CORRECT POSITION?
If you have already connected the KCA-BT300 or older KCA-BT200 to your head-unit and found that it would not function. You need to check that the switches on the KCA-BT300/200 are in the correct position.
NOTE: If you change the switch positions you will need to RESET your head-unit before the changes take affect. For notes on how to RESET your head-unit please refer to your instruction manual.