2010 Lexus ES 350 Owners Manual - Page 184

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2-1. Driving procedures

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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.)

■

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. 152, 155)

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If the shift lever cannot be shifted from P

→

P. 475

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If the

indicator does not come on even after shifting the shift lever to S

mode driving position

This may indicate a malfunction in the automatic transmission system. Have the

vehicle inspected by your Lexus dealer immediately.

(In this situation, the transmission will operate in the same as manner as when the

shift lever is in D.)

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S mode

●

When the shift range is 5 or lower, holding the shift lever toward “+” sets the shift

range to 6.

●

To prevent excessive engine speed, a function was adopted that automatically

selects a higher shift range before engine speed becomes too high.

●

To protect the automatic transmission, a function is adopted that automatically

selects a higher shift range when the fluid temperature is high.

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AI-SHIFT

AI-SHIFT automatically selects the suitable gear according to driver performance

and driving conditions.

AI-SHIFT automatically operates when the shift lever is in the D position. (Shifting

the shift lever to the S mode driving position cancels the function.)