Well topic says about pairing, pairing should work always after few attempts or you are using wrong pin. Pairing and pin entering instructions are in here http://images.kenwood.eu/files/prod/...00%28EN%29.pdf

Sync is not even supposed to work as PBAP is currently not supported. Of course your carkit might just be using profiles that are not supported even for calling. Does handsfree profile work for audio listening?