The driver's door lock on my 2003 Honda Pilot does not work. It will not work with the remote, the key in the door, the button from the inside, or maually pulling up the lock on the door itself. All the other doors locks work fine. What can I do to try and fix this problem myself or is it best left up to an expert to diagnose it and replace a part?
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This is not a problem with the remotes. It probably doesn't work with the door lock switch either. I had the same problem and it is the power lock actuator. The problem is that the replacement part it is not just an actuator - It is the whole door latch. I replaced mine and you will need a hand impact driver to remove the 3 screws that hold the latch on the edge of the door. The Haynes manual will give you the steps with some pictures.
The Power locks actuators need to be replaced. I did on my front passenger door already. A friend of mine had to do it in the 2 passenger side doors. The part is the whole door latch mechanism. You will need a hand impact driver to remove the 3 screws on the door jamb.
The door lock/unlock
input from the driver's key switch goes to the Door Multiplex control
unit (main switch), the Door multiplex control unit then sends a signal
on the BUS (CAN) circuit to the passenger's multiplex control unit; the
passenger's multiplex control unit then controls all the door locks. The passenger's door lock key switch inputs to the passenger's multiplex control unit, if the
locks work from the passenger's side key switch but not the driver's
side key switch, the most likely cause is the driver's multiplex
control unit (main switch) not sending the signal to the passenger's
side multiplex control unit. This could also be the drivers side door lock actuator. Hope this helps!