2009 Toyota 4Runner Owners Manual - Page 211

2-4. Using other driving systems n Operating tips The system will operate when the shift lever is in a position other than P. However, to make effective use of the system it is recommended that the shift lever be shifted to 2 or L. n The system will not operate when The four-wheel drive control switch is in the H2 or H4 position. n The downhill assist control indicator flashes when l The shift lever is in N. l The four-wheel drive control switch is in the H2 or H4 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. (There is no problem with continuing normal driving.) n System malfunction l The downhill assist control indicator does not come on when the engine switch is turned to the ON position. l The downhill assist control indicator does not come on when the DAC switch is pressed. In the above cases have your vehicle checked by your Toyota dealer. 2 When driving CAUTION n Do not rely excessively on the downhill assist control system It may not be able to maintain a low speed over road surfaces on which sliding can easily occur, such as extremely steep slopes or icy or muddy roads. 187