Well, the obvious would be to put things in a "normal" state- for each setting.
Set your camera into AV mode. Aperture- at most open. Exposure compenstation at zero. AWB. One Shot AF. Single shot. Evaluative Metering.
Set the ISO at something like 200 if you can go out during daylight, or 800 if indoors. If indoors, go into the KITCHEN- turn on the lights, and take a shot. Why the kitchen? Usually the brightest of rooms..
I am guessing that you have the camera in some other metering than Evaluative.