Bike interface OBD

Hi all!
I'm trying to connect my kawasaki using @TriB OBD-II bluetooth project OBD II Bike Connector - Pass via bluetooth - #248 using Car Scanner app.
Could you tell me the proper init protocol to connect app to the bike?
I tried 10.4kbps fast init and 5 baud init but it doesn't work either.
Here you can see the time sequence in arduino uart lines:


Ch1: arduino TX to L9637 kline transceiver
Ch2 & Ch3: arduino to bluetooth module uart.

It seems the init sequence starts with the corresponding 25ms step down but after that, nothing happens (but a re-attempt 3.8secs after).

Any suggestion?