CCD photometry of the newly discovered eclipsing dwarf nova IY UMa is used to study the physical properties of the accretion disc in the late decline and quiescence stages .
Eclipse mapping analysis shows that in these stages the accretion disc is cool with approximately flat radial brightness temperature distribution and T _ { BR } \sim 5000 - 5500 K. The hot spot is found to lie close along the stream trajectory at distance 0.36 a and 0.25 a from the disc center in February and March .
The orbital hump strength decreases by \sim 30 % in a month .
Taking the smallest possible size of the hot spot , we derive an upper limit for its brightness temperature , \sim 15900 K and \sim 13800 K , respectively .