Principles Of Operation

Four Wheel Drive (4WD) Systems - 1-Speed Torque-On-Demand

Principles of Operation

The 1-speed torque-on-demand transfer case modes are controlled through the 4X4 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 AUTO mode can be changed to AWD LOCKED mode by pressing the message center SETUP button; the message AUTO will be selected, press RESET within 4 seconds, then the message LOCKED will be selected 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 (IC). This mode is not recommended for use on dry pavement or hard surfaces. AWD LOCKED mode can be changed to AWD AUTO mode by pressing the message center SETUP button; the message LOCKED will be selected, press RESET within 4 seconds, the message AUTO will be selected 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 IC. 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 Lamp (MIL) (wrench indicator) in the IC will illuminate.