Jak's sensors were jammed by all the signals the ship was putting out, so he had no way of detecting where Jax's body was. It was like playing hide and seek with a dead man, only this was to safe a life. Jak began to think where Jax might have died at. Somehow, he ran better when he was in an area of high temperature, so he might be in the boiler room, with some of his metal melted and spilled on the ground. Jax did that one time before, and it was a big mistake which he should have learned, but apparently he did not. With that information in his solid state drive, he began to run off towards the boiler room.