DCCD = driver controlled centre differential
(Here is my understanding of it)

It can only really control the torque distribution between front and rear - not each individual wheel.

The 'electronically controlled' term refers the electronic nature in which it applies diff lock.

The auto mode uses various signals and sensors to apply various levels of diff lock. Eg throttle application, handbrake application

At full open, the torque will be distributed at a 'set' ratio between the front and rear, regardless of traction.
Once the diff starts locking, the torque spread will vary according to grip and level of diff lock. A fully locked centre diff will send the torque to wherever between the front and rear that has the most traction.

This link explains better DCCD Explained