Regulates ATP-dependent protein translocation into the mitochondrial matrix (By similarity). Essential for larval development. Probable component of the PAM complex at least composed of a mitochondrial HSP70 protein, Roe1, TIM44, blp/TIM16 and TIM14. Associates with the TIM23 complex. Expressed in distinct cells in the embryonic and larval nervous system. Highly expressed in early embryos. The J-like region, although related to the J domain does not have co-chaperone activity. Belongs to the TIM16/PAM16 family.