2008 Toyota Highlander Owners Manual - Page 805

2 -4 . U sing ot he r driving syst e m s Dow nhill Assist Control system (4WD models only) The downhill assist control system helps to prevent excessive speed on steep downhill slopes. The system will operate when the vehicle is traveling under 15 mph (25km/h) and shift lever is in the 1 range in S mode or R position. n System operation Press the "DAC" switch. The indicator will come on, and the system will operate. There may be a malfunction in a system if the indicator light does not come on. When the system is in operation, the slip indicator light will flash, and the stop light/high mounted stoplight will be lit. A sound may also occur during the operation. This does not indicate a malfunction. 2 When driving n Turning off the system Press the "DAC" switch while the system is in operation. The indicator will flash as the system gradually ceases operation, and will turn off when the system is fully off. Press the "DAC" switch while the indicator is flashing to start the system again. n Operating tips If the downhill assist control system indicator light flashes, the shift lever may not be in 1 range of S mode or R position. n If the brake system overheats The system will cease operation and a buzzer will sound to alert the driver. Stop the vehicle in a safe place. (Do not continue normal driving.) 207