Once we had a pre-shared key configured, we are not able to see them directly applying show running command, as the key is encrypted. The output displayed it as *******.
kis-asa-5515X# sh running-config | include shared ikev1 pre-shared-key ***** ikev1 pre-shared-key *****
Use more command,
kis-asa-5515X# more system:running-config | in shared ikev1 pre-shared-key SEE_YOUR_PASS ikev1 pre-shared-key SEE_YOUR_PASS
Look at: http://www.cisco.com/c/en/us/support/docs/security/pix-500-series-security-appliances/82076-preshared-key-recover.html