I just posted this response which I found relating to the TOD Check light:

"Not sure if this will help you but I had a problem with a buzzing sound coming from under my passenger seat. I took out the seat and pulled up the rug to find a relay/transformer making a buzzing sound. When I removed it the TOD CHECK light came on. The relay looks like this:
http://www.in-car-stuff.com/shop/relay-spco-p-59.html

The specs are: 40A/30A 12VDC

Not sure if this would work but replacing it may do the trick. I found them on ebay really cheap ($10)."

Hope that can help someone