Lexus 2011 RX350, Owner'S Manual

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2-1. Driving procedures
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Snow mode automatic deactivation
Snow mode is automatically deactivated if the “ENGINE START STOP” switch is
turned off after driving in snow mode.
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S mode
l
When the shift range is “5” or lower, holding the shift lever toward “+” sets the
shift range to “6”.
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To prevent the engine from over-revving, upshifting may automatically occur.
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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 optimal 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 position cancels the function.)
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When driving with the cruise control or dynamic radar cruise control
Engine braking will not occur in S mode, even when downshifting to “5” or “4”.
(
→
P. 204, 208)
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If the shift lever cannot be shifted from P
→
P. 579
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If S 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 transmission will operate in the same as manner as when the
shift lever is in D.)
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Downshift restriction warning buzzer (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 buzzer will sound twice.)