Selectable Drive Modes

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:

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

The following drive modes are available:

• Conserve 

  For efficient and responsible driving. Conserve helps deliver maximum fuel efficiency and increases driving range.

• Deep Conditions 

  For crossing terrain that has deep, rutted surfaces such as mud or deep sand.

• Deep Sand 

  For driving on deep, soft and dry sand.

• Excite 

  For more aggressive on-road driving; increases throttle response, provides a sportier steering feel along with quicker shifting and a stiffer suspension. The transmission also holds gears longer, helping the vehicle accelerate faster when shifting gears.

• Normal 

  For normal, everyday on-road driving and towing. The Tow-Haul function can only be used in Normal mode.

• Slippery 

  For firm surfaces covered with loose or slippery material such as packed snow, ice, water, grass or a thin layer of gravel or sand.

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