The new method of construction of self-checked testers for codes with constant weight m=4 is offered, The method provides construction of testers with the improved characteristics in comparison with known testers. In the first part ofwork the guestion of construction of self-checked testers ifword length of an entrance vector is equal 9<n<16 is considered. In the second part of work the question of construction of self-checked testers if word length of an entrance vector more or is equal 17<n<24.