I return with a remark. 
The CAN cape was detected after installing bb.org-overlays. 
So candump and cansend commands can be used as expected.
The problem I had before was regarding to another LCD cape that is attached 
to beaglebone.

For what dmesg output returns, seem to be a pin conflict between capes.
[    3.557591] bone_capemgr bone_capemgr: slot #4: BB-CAN1 conflict P9.26 
(#0:BB-BONE-4D4R-01)
[    3.566124] bone_capemgr bone_capemgr: slot #4: Failed verification
[    3.586720] bone_capemgr bone_capemgr: loader: failed to load slot-4 BB-
CAN1:00A0 (prio 0)

Also, trying to use the overlay, won't work.
echo BB-CAN1 > /sys/devices/platform/bone_capemgr/slots
-bash: echo: write error: File exists

>From HW schematic doesn't seem to be a problem, only UART5 is used by LCD
Do you have any idea on how can I resolve this conflict?

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