Originally Posted by f1anatic
But isn't it what SNOW mode does ?
No, it doesn't unless you're in 4WD LOW. From the owners manual...
The ESC system has two available operating modes in 4WD HIGH range and two-wheel drive vehicles, and one operating mode in 4WD LOW range.
High Range (Four-Wheel Drive Models) Or Two-Wheel Drive Models
This is the normal operating mode for ESC in 4WD HIGH range and in two-wheel drive vehicles. Whenever the vehicle is started or the transfer case (if equipped) is shifted from 4WD LOW range or NEUTRAL back to 4WD HIGH range, the ESC system will be in this “On” mode. This mode should be used for most driving situations. ESC should only be turned to “Partial Off” mode for specific reasons as noted below.
This mode is entered by momentarily pressing the “ESC OFF” switch. When in “Partial Off” mode, the TCS portion of ESC, except for the BLD feature described in the TCS section, has been disabled and the “ESC Off Indicator Light” will be illuminated. All other stability features of ESC function normally. This mode is intended to be used if the vehicle is in deep snow, sand, or gravel conditions and more wheel spin than ESC would normally allow is required to gain traction.
To turn ESC on again, momentarily press the “ESC OFF” switch. This will restore the normal “ESC On” mode of operation.
NOTE: To improve the vehicle’s traction when driving with snow chains, or starting off in deep snow, sand, or gravel, it may be desirable to switch to the “Partial Off” mode by pressing the “ESC OFF” switch. Once the situation requiring ESC to be switched to the “Partial Off” mode is overcome, turn ESC back on by momentarily pressing the “ESC OFF” switch. This may be done while the vehicle is in motion.
4WD Low Range
This is the normal operating mode for ESC in 4WD LOW range. Whenever the vehicle is started in 4WD LOW range, or the transfer case (if equipped) is shifted from 4WD HIGH range or NEUTRAL to 4WD LOW range, the ESC system will be in the “Partial Off” mode.