Electric Controlled Coupling

WARNING: This page is about a different car, the 2011 Infiniti EX35. However, it is still accessible from the selected car via links, so may be relevant.

Fig 1: Identifying Electric Controlled Coupling

Courtesy of NISSAN MOTOR CO., U.S.A.

AWD control unit supplies command current to electric controlled coupling (AWD solenoid).
Control clutch is engaged by electromagnet and torque is detected in control clutch.
The cam operates in response to control clutch torque and applies pressure to main clutch.
Main clutch transmits torque to front wheels according to pressing power.
- Transmission torque to front wheels is determined according to command current.
  
  Fig 2: Current-Torque Graph
  Courtesy of NISSAN MOTOR CO., U.S.A.