Even with all the correct SNMP information we never could get the Cisco 1602i to poll in Airwave. It would hang and timeout after 10 minutes.
But we found a solution!
We were able to get an earlier version of the Cisco IOS for the 1602i access point - 15.2(2)JC2 - and TFTPed it into the AP. Everything now works. Something changed (maybe the MIB?) when Cisco went to IOS15.3(3)JC and, at least in our experience, the new IOS does not work in Airwave as a Cisco IOS AP device.