I have a '97 Lexus ES300 (131K miles). My Connecticut Emissions test failed today due to no OBDII communication. The guy said he couldn't get a reading. He suggested it could be as simple as a blown fuse or as complex as the computer itself.
I did some search on google and various forums. It was suggested to check the cigarette lighter as an indicator of a blown fuse. My cigarette lighter works fine. I use that to charge my cellphone daily.
What other fuse could I look at? Where would be the location of the fuse? If the fuse is fine, what else do I need to look into?
I would appreciate any help I can get. Thank you in advance!