Pinging Another Interface other than the connected interface -Cisco ASA

In Cisco ASA, we cannot ping another interface from the interface we are connected to.

For example, we would be able to ping dmz from inside and vice versa

It is disabled by design , and we cannot change that behaviour.

http://www.cisco.com/en/US/products/hw/vpndevc/ps2030/products_tech_note09186a0080094e8a.shtml#topic0