Selectable Drive Modes

On vehicles equipped with AWD, the selectable drive mode system optimizes driveability and comfort as well as maximizing traction while operating on different types of terrain. The ATCM controls the drive mode selection. When a drive mode is selected, the ATCM sends the drive mode message to the ABS module over the HS-CAN2. When the ABS module receives the message, it alters the intervention thresholds for ESC, RSC and traction control based on the selected mode. The ABS module also sends the drive mode message out to several other modules. The following modules receive the message and respond by altering their operation as follows:

• AWD module: automatically engages and disengages specific 4WD modes and raises or lowers torque output based on the selected mode.
• PCM: adjusts throttle response and gear changes to enhance powertrain response based on the selected mode.
• PSCM: adjusts steering effort and feel based on the selected mode.

The following drive modes are available:

• Deep Snow / Sand 

  : For deep snow or soft dry sand.

• Eco 

  : For efficient and responsible driving. This mode helps deliver maximum fuel efficiency and increases driving range.

• Normal 

  : For everyday driving. This mode is a perfect balance of excitement, comfort and convenience.

• Slippery 

  : For less than ideal road conditions, such as snow or ice covered roads.

• Sport 

  : For aggressive on-road driving. This mode increases throttle response, provides a sportier exhaust sound and steering feel, along with quicker shifting. The transmission holds gears longer, helping the vehicle accelerate faster when shifting gears.

• Tow / Haul 

  : For improved transmission operation when towing a trailer or a heavy load. This mode moves upshifts to higher engine speeds to reduce the frequency of transmission shifting. This mode also provide engine braking in all forward gears, which slows the vehicle and assists in controlling the vehicle when descending a grade. The amount of downshift braking provided varies based on the amount the brake pedal is pressed.

• Trail 

  : For muddy, rutted, soft or uneven terrain.

Drive mode changes are not available when the ignition is off. If a mode is unavailable, the system defaults to Normal mode.