2001 Toyota Camry wagon passenger side locks not working

[dexter898]

Gday, I've got a 2001 Camry wagon which has been having locking issues for a while now, just started occurring out of the blue.

There is no fob so we manually unlock and lock from the driver side door, however the rear and front passenger doors consistently have issues. Either when we unlock one or both doors don't unlock and must be unlocked from inside the car, or when we lock it one or both don't lock and the car beeps. To fix that, we open the door, lock it from the inside, the lift up the handle and close the door before releasing the handle. That fixes the locking issue. 

When testing the locks from inside the car, I can see that they partially lock and unlock, so I'm wondering if they need to be replaced entirely or if there's some other way to fix it.

Cheers

[Luke 03 Camry]

Had a similar issue with my 2003 Camry sedan. I'm think the mechanism might be bit stiff, so removing the door card and spraying the locking cable (the one that pushes the lock knob into the lock and unlock position on the interior door handle) with some Innox might work to loosen up the old grease and get it working again.