Thanks for your reply!
Actually, the door trim panel has not been put on yet. The door would not open so I don’t even have a chance to put it on… the linkage works fine, because I can clearly see and feel all the mechanism of the lock. The thing is no matter how I operate the lock, everything seemingly good but it just won’t open! By operating the lock, I meant I actually pulled the cable or use a screw driver to pry the latch which the cable connected.
To compare with the working door lock on driver side of the car, when I pull the handel from outside and pull the cable from inside of the passanger side lock (the broken one), I feel either the door is locked (by remote) or the door is not closed – the handel has no resistance-like feeling however the sensor/switch shows the door is closed.