I've got what I think is the exact same problem, and am looking for an answer.
99 EX, owned since new, replaced rollers, very familiar with normal operation, etc.
Problem with the passenger side power sliding door
Just recently, here's what it does (all the time, now):
lock/unlock works just fine
driver's side fine
closes fine
opens fine when pulling the outside handle
does not open with:
- key fob,
- "open" button on dash, or
- inside handle
When I do this, I can hear something happening (motors, etc.), but it fails to open and then beeps, ending in a fully closed state.
I've tried helping it by pulling the rear of the door outward while pressing the key fob. I figured that if it were binding on something, my pulling would be enough to overcome that. But it does not help.
And since I can hear it trying to do something, my thought is that the electrical signal is getting there. Just somehow the unlatch operation does not happen - unless I open it with the outside handle.
Is there some unlatching actuator that could have failed? The lock/unlock actuator works fine, as does the motor that pulls the rear of the door inward to finish closing it.
Thanks for any help.