Principles of Operation

Principles of Operation
The one-speed torque-on-demand (TOD) transfer case modes are controlled through the four wheel drive (4WD) control module.

The modes are:
^ All wheel drive (AWD) AUTO - torque is supplied to the front and rear driveshafts as needed to maintain traction. AWD mode can be changed to AWD LOCKED mode by pressing the message center SETUP button; the message AWD AUTO will be displayed, press RESET within 4 seconds, then the message AWD LOCKED will be displayed and the 4x4 indicator will be illuminated.
^ AWD locked - torque is supplied to the front and rear driveshafts constantly and the 4x4 indicator will stay illuminated in the instrument cluster. This mode is not recommended for use on dry pavement or hard surfaces. AWD mode can be changed to AWD AUTO mode by pressing the message center SETUP button; the message AWD LOCKED will be displayed, press RESET within 4 seconds, the message AWD AUTO will be displayed and the 4x4 indicator will turn off.

If the transfer case begins to overheat, the system will default to the Autolock mode. The 4x4 indicator will illuminate in the instrument cluster. This condition may clear without any action being taken by the driver. The 4x4 indicator will turn off when the system cools down.

When a problem is detected in the AWD system, the powertrain malfunction indicator (wrench indicator) in the instrument cluster will illuminate.