I had an instance with the same MIL code. Initially checked the wiring. Did not notice anything unusual. In a web search ran into the AF, all the comments gave me a lot of in depth clues to follow. Checked the relay, it had low resistance. Checked the fuse, it was not blown but the casing was melted up to the PDC bottom. The only thing I did not check was the fan. Following all the ideas suggested here disconnected the battery. I bought a relay and a fuse and replaced them. Then reconnected the battery and took a big sight. I did not know the condition of the fan. I turned the ignition on and looked for any smoke, but Walla! The MIL cleared and the fan started roaring like a big cat. I hope it continues to work thru the summer. After all that I opened the relay and found that the coil was also open. This happened at 83000 miles. I hope this helps you guys. Thanks for all the help you all
