Is it in Autonomous or Lightweight mode?

A quick 'show version' will indicate if the Cisco Wireless Access Point is in Autonomous or Lightweight mode:

cisco AIR-LAP1131AG-N-K9 (PowerPCElvis) processor (revision A0) with 24566K/8192K bytes of memory.
Processor board ID FTX1217N0DF
PowerPCElvis CPU at 262Mhz, revision number 0x0950
Last reset from power-on
LWAPP image version 5.1.151.0
1 FastEthernet interface
2 802.11 Radio(s)

Another give away is that you can not enter 'config t' mode on when in Lightweight mode.