Doesn't have a traditional MAF. The 1st and 2nd gen Camrys use what is called an AFM or a vane-type Air Flow Meter- There is a rheostat of sorts turned by the flap as the engine speeds up and draws more air through the sensor. They can't really be cleaned, though you could use WD-40 to clean/lube the pivot points of the flap if you're afraid they're dirty.