Fully engaged, active ESP means all modes — all active, all the time. This is called the Fully ON mode and should be used for normal driving. The Fully ON mode completely activates the Antilock Brake System, Low-Speed Traction Control, All-Speed Traction Control, ESP Yaw Control, and Electronic Roll Mitigation. By default, whenever the vehicle is started, ESP is Fully ON or fully active.
Fully ON is automatically engaged, requiring no specific driver input. The system defaults to Fully ON each time the key is turned from the “off” to the “on” position or when shifting the transfer case on 4x4 vehicles. One push of the ESP button will put ESP back into the Fully ON mode if the vehicle is already in the Partially OFF or Fully OFF setting.
The Partially OFF mode provides less automatic control by modifying the all-speed traction control and ESP yaw control thresholds. This will allow for limited wheel slip for high-performance driving situations, or driving off-road.
To select the Partially OFF mode, a single press of the “ESP OFF” button at any speed is all it takes. A warning lamp in the instrument cluster will illuminate.
Fully OFF (not available on Grand Cherokee)
The Fully OFF mode completely disables All-Speed Traction Control, ESP Yaw Control and Electronic Roll Mitigation. This mode is reserved for high-performance vehicles and off-road-capable vehicles when in four-wheel-drive mode.
To select the Fully OFF mode, press and hold the “ESP OFF” button for at least 5 seconds but not more than 14 seconds while under 10 mph. A chime will sound, a warning lamp will illuminate and a text message — ESP OFF — will appear in the instrument cluster (on vehicles with EVIC). Fully Off mode is automatically activated on 4x4 vehicles when the transfer case is shifted to 4LO mode.
When 4x4 vehicles exceed 40 miles per hour, ESP automatically switches from Fully OFF to Partially-OFF. In 4x4 vehicles, added safety is achieved by having all of ESP’s features active above 40 mph. This is not done in SRT vehicles because these vehicles are optimized for higher rates of speeds.
Note that regardless of the mode, the antilock brake system and low-speed traction control remain active — all the time.
"fully off" was not available on Grand Cherokee