2009 Lexus IS 350 Owners Manual - Page 136
2009 Lexus IS 350 Manual
Page 136 highlights
2-1. Driving procedures n If does not come on even after shifting the shift lever to S This may indicate a malfunction in the automatic transmission system. Have the vehicle inspected by your Lexus dealer immediately. (In this situation, the vehicle will operate as if the shift lever is in D.) n AI-SHIFT The AI-SHIFT automatically shifts the gear to the optimal position according to the driver performance and driving conditions. The AI-SHIFT automatically operates when the shift lever is in the D position. However, operating the "-" shift paddle switch will restrict the function's operation. (Shifting the shift lever to the S position cancels the function.) CAUTION n When driving on slippery road surfaces Be careful of downshifting and sudden acceleration, as this could result in the vehicle skidding to the side or spinning. 136