Backed up and heard/felt "clunk" from back when stopping. Proceeded forward and when stopping brakes "shuddered". Felt like a loose pad. Dash lit up then with ESP/BAS light (upper left), ABS light (upper right) and ESP icon (lower middle) staying on since.

Manual says if they stay on through several ignition cycles and after driving several miles above 30 mph, which I've done, to see the dealer. I'd like to try to fix it myself. Any suggestions or help would be greatly appreciated. Thanks in advance for advice.
John ('06 KJ 4x4 gasser, 48,800 mi.)