How to Use downhill assist on the 2010 Toyota 4Runner
The 2010 Toyota 4Runner comes with several features – one of which is Downhill Assist Control or DAC. When the driver turns the DAC feature on by simply pressing a button, it will help the car as it descends along slippery and/or steep slopes. When DAC is activated, a green icon will be lit up. DAC works with the A-TRAC (or the Active Traction system) and the ABS (or anti-lock braking system) to help keep the 4Runner's speed below 15 mph, a safe speed for driving down steep grades.