I just got a used 2001 T4R SR5 thats decked out. Its pretty much a limited - it has running boards, a roof rack, a sunroof and everything. I have not got the manual yet as it is in the mail. I have a rear view mirror with the temp. and compass buttons. The compass works great but when I hit the temp button it just says OC. Anyone know what the deal with this is and how I can fix it???