Transfer Case Assembly: Description: Notes

Based on a driver request for lock mode, the system will supply a fixed torque to the ITCC (Intelligent Torque Controlled Couplings) clutch.
When the vehicle exceeds 30KPH the system will begin to disable lock mode by ramping down the ITCC clutch torque. When the vehicle exceeds 40 KPH the ITCC clutch is reduced to its minimum torque value. Lock mode is re-enabled following the same speed-to-torque map.
Lock mode is activated based on part number.

Fig 1: Lock Mode Speed Sensor Signal Graph
Courtesy of HYUNDAI MOTOR CO.
Lock mode will override all other system requests except for during an ABS event. During an ABS event the ITCC clutch is turned off.
If there is a speed sensor signal fault, the speeds are no longer considered reliable and lock mode will be disabled.