Honda CRV Computer No Communication

My Scanner (which Works On Another Car) Powers Up, Runs Through The Different Data Types (can Etc.) But Cannot Communicate. I Have...

I Already Checked All The Fuses And Relays And All Of Them Are Good. Also, When I Put The Scanner, It Doesn't Read Any Codes And All It...

I Took A Honda Crv For Scanning. The Scanner Could Not Connect To The Ecu But Could Scan The Abs And Srs Systems. Pls Whats The Next Step To...