2011 Lexus LS 460 Owners Manual - Page 266

2-1. Driving procedures n "S" mode l When the shift range is "6" or lower, holding the shift lever toward "+" sets the shift range to "8." l When the shift range is "6" or higher, moving the shift lever toward "-" may change down by 2 shift ranges or more depending on driving conditions. l To prevent the engine from over-revving, upshifting may automatically occur. n Downshifting restrictions warning buzzer (in the "S" mode) To help ensure safety and driving performance, downshifting operation may sometimes be restricted. In some circumstances, downshifting may not be possible even when the shift lever is operated. (A buzzer will sound twice.) n When driving with the cruise control system Engine brake will not operate in the "S" mode, even when downshifting to "7", "6", "5" or "4". (→P. 211, 215) n Snow mode automatic deactivation Snow mode is automatically deactivated if the "ENGINE START STOP" switch is turned OFF after driving in snow mode. n Eco drive mode When the vehicle is driven in eco drive mode, vehicle driving force and operation of the air conditioning system (heating/cooling) is controlled to improve fuel efficiency. If eco drive mode is turned on when the driving mode is in power mode or snow mode, power mode or snow mode will be canceled. n If the shift lever cannot be shifted from "P" →P. 736 n AI-SHIFT The AI-SHIFT automatically selects the optimal gear according to driver performance and driving conditions. The AI-SHIFT automatically operates when the shift lever is in the "D" and "S"position. The engine speed may stay high while depressing the accelerator pedal and may remain high after releasing the accelerator pedal. This does not indicate a malfunction. 170