Re: code definitions
Yes, if the connection between the actuator and the blend door is disturbed, the actuator will continue rotating and then the code for "travel too large" will be set. Only strange thing is that the code 56 is for the right blend door travel too large, which should be the passengers side (which sits on the front side of the HVAC housing and can not be seen without removing the HVAC.) You found a problem with the blend door actuator behind the glove box, which is for the drivers side.
Regarding the door locks, the drivers door module only switches the drivers door lock, while the passengers door module, switches all the other door locks. Does the drivers door lock work also with the remote? The reason i ask is, that the receiver for the remote lock/unlock, sits inside the passengers door module. If this module is dead, only the drivers door lock continues to work, but not via the remote. You could try a battery reset, which can reset a frozen door module. If that doesnīt help, than check the wires in the passengers side rubber door boot. The thick black wire is too rigid and will break after many times flexing. But eventually it can be an other wire in the boot, so check them all.