Setting the ACC Following Distance
The ACC following distance can be set by changing the distance setting between four bars (longest), three bars (long), two bars (medium) and one bar (short). Using this distance setting and the vehicle speed, ACC calculates and maintains the distance to the vehicle ahead. This distance setting is displayed in the instrument cluster display.

Distance Settings
- Maximum Distance Setting (Four Bars)
- Medium Distance Setting (Two Bars)
- Long Distance Setting (Three Bars)
- Short Distance Setting (One Bar)
To increase the distance setting, press and release the distance setting increase button. Each time the button is pressed, the distance setting increases by one bar (longer).
To decrease the distance setting, press and release the distance setting decrease button. Each time the button is pressed, the distance setting decreases by one bar (shorter).
If there is no vehicle ahead, the system maintains the set speed. If a slower vehicle is detected in the same lane, the instrument cluster displays the ACC Set With Target light. The system then automatically adjusts vehicle speed to maintain the distance setting, regardless of the set speed.
After this, the vehicle will maintain the set distance until:
- The vehicle ahead accelerates above the set speed
- The vehicle ahead leaves your lane or sensor view
- The distance setting is changed
- The system turns off
The maximum braking applied by ACC is limited; however, the driver can always apply the brakes manually if necessary.
NOTE:
The brake lights illuminate whenever the ACC system applies the brakes.
The Proximity Warning will alert the driver if ACC predicts that its maximum braking level is not sufficient to maintain the set distance. If this occurs, the visual alert "BRAKE!" will flash in the instrument cluster display and an audible chime will sound, while ACC continues to apply maximum braking capacity.
NOTE:
The "BRAKE!" message in the instrument cluster display is a warning for the driver to take action and does not necessarily mean that the Forward Collision Warning system is applying the brakes autonomously.
Passing Assist
When driving with Adaptive Cruise Control on after passing a vehicle, the system will provide additional acceleration up to the ACC set speed to assist in passing the vehicle. This additional acceleration activates when the driver uses the left turn signal and will only be active when passing on the left side.
Test yourself
A quick Jeep Wrangler quiz: every answer comes with an explanation and a link to the manual page.