2010 Jeep Wrangler Owner's Manual - Page 384
2010 Jeep Wrangler Manual
Page 384 highlights
STARTING AND OPERATING 383 WARNING! With the ESP switched off, the enhanced vehicle stability offered by ESP and ERM are unavailable. In an emergency evasive maneuver, the ESP and ERM systems will not engage to assist in maintaining stability. The "Full Off" ESP mode is intended for off-road use only. 4L Range (4WD Models) ESP Off This is the normal operating mode for ESP in 4L range. Whenever the vehicle is started in 4L range, or the transfer case (if equipped) is shifted from 4H range or NEUTRAL to 4L range, the ESP system will be in this mode. In 4L range, ESP and TCS, except for the "limited slip" feature described in the TCS section, are turned off until the vehicle reaches a speed of 40 mph (48 km/h). At 40 mph (48 km/h), the normal ESP stability function returns but TCS remains off. When the vehicle speed drops below 35 mph (40 km/h), the ESP system shuts off. The ESP is off at low vehicle speeds in 4L range so that it will not interfere with off-road driving, but the ESP function returns to provide the stability feature at speeds above 40 mph (48 km/h). The "ESP/TCS Indicator Light" will always be illuminated in 4L range when ESP is off. NOTE: The "ESP OFF" message will display and the audible chime will sound when the shift lever is placed in the PARK position from any position other than PARK, and then moved out of the PARK position. This will occur even if the message was previously cleared. 5