If The “S” Indicator Does Not Come On Even After Shifting The Shift Lever To S (Multi-Mode Type); Downshift Restriction Warning Buzzer (S Mode In Multi-Mode Type) - Toyota 4RUNNER Owner's Manual

2-1. Driving procedures
If the "S" indicator does not come on even after shifting the shift lever
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to S (multi-mode type)
This may indicate a malfunction in the automatic transmission system. Have
the vehicle inspected by your Toyota dealer immediately.
(In this situation, the transmission will operate in the same manner as when
the shift lever is in D.)

Downshift restriction warning buzzer (S mode in multi-mode type)

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To help ensure safety and driving performance, downshifting operation may
sometimes be restricted. In some circumstances, downshifting may not be
possible even when the shift lever is operated. (A buzzer will sound twice.)
CAUTION
When driving on slippery road surfaces
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Do not accelerate or shift gears suddenly.
Sudden changes in engine braking may cause the vehicle to spin or skid,
resulting in an accident.
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