Lexus IS250 2006 Owner's Manual page 118

2-1. Driving procedures
Gear position display when driving in S mode
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The current gear is displayed on the multi-information display. (P. 117)
Downshifting restrictions warning buzzer (in the S mode)
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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 or shift paddle switch is operated. (The warning buzzer will
sound twice.)
When driving with the cruise control system or dynamic radar cruise control sys-
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tem
The engine brake will not operate in the S mode, even when downshifting to 5 or 4.
(P. 126, 129)
SNOW mode automatic deactivation
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SNOW mode is automatically deactivated if the engine switch is turned to ACC or
IG-ON mode after driving in SNOW mode.
If the shift lever cannot be shifted from P
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P. 361
If the indicator does not come on even after shifting the shift lever to S
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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.)
AI-SHIFT
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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.)
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