How is Imperfect Contrition of Catholic Catechism justified with reference to Jn 14:15?

We hear Jesus saying in Jn 14:15: >If you love Me, keep My commandments. Elsewhere, we see Jesus telling the rich man, in Mtt 19:17,before naming some of the Ten Commandments: >..if thou wilt enter into life, keep the commandments. Catechism of the Catholic Church teaches about two types of contrition under the Sacrament of Reconciliation : (i)Perfect contrition – An act made out of love for God, and.. (ii) Imperfect contrition – An act made for some other motive such as fear of Hell. The Catechism further explains that either type of contrition is sufficient in order to make a confession and have our sins forgiven. Now, read Jn 14:15 in the reverse order and we have : "If you keep My commandments, you love me ; if you do not keep my commandments, you do not love me ." Doesn't that put a limitation on Imperfect Contrition which does not examine the breach of love for Jesus ? My question therefore, is : How is Imperfect Contrition of Catholic Catechism justified with reference to Jn 14:15 ?