2008 Lexus ES 350 Owners Manual - Page 163

121

2-1. Driving procedures

2

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Downshifting restrictions warning buzzer (in the S mode)

To help ensure safety and driving performance, downshifting operation may some-

times be restricted. In some circumstances, downshifting may not be possible even

when the shift lever is operated. (The warning buzzer will sound twice.)

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When driving with the cruise control system or dynamic radar cruise control sys-

tem

The engine brake will not operate in the S mode, even when downshifting to 5 or 4.

(

→

P. 141, 144)

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If the shift lever cannot be shifted from P

→

P. 398

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If the

indicator 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 (Artificial Intelligence 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. (Shift-

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