2010 Lexus IS 250 Owners Manual - Page 233

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2-1. Driving procedures

2

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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.)

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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. How-

ever, operating the “-” shift paddle switch will restrict the function’s operation. (Shift-

ing the shift lever to the S position cancels the function.)

CAUTION

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When driving on slippery road surfaces

Be careful of downshifting and sudden acceleration, as this could result in the vehi-

cle skidding to the side or spinning.