Lexus GS 350 Owner's Manual page 232

Automatic deactivation of shift range selection in the D position
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Shift range selection in the D position will be deactivated in the following situations:
When the vehicle comes to a stop
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If the accelerator pedal is depressed for more than a certain period of time
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When the shift lever is shifted to other than D
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To protect automatic transmission
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When the temperature of the transmission fluid becomes high, protection control is per-
formed temporarily. When "Transmission Fluid Temp High See Owner's Manual" is dis-
played on the multi-information display, have the vehicle inspected by your Lexus dealer.
Downshifting restrictions warning buzzer
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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 or paddle shift switch is operated. (A buzzer will sound twice.)
Snow mode automatic deactivation (if equipped)
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Snow mode is automatically deactivated if the engine switch is turned off after driving in
snow mode.
When driving with cruise control, dynamic radar cruise control or dynamic radar
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cruise control with full-speed range activated
Even when performing the following actions with the intent of enabling engine braking,
engine braking will not activate because cruise control, dynamic radar cruise control or
dynamic radar cruise control with full-speed range will not be canceled.
While driving in the D position, downshifting to 7, 6, 5 or 4. (P. 305, 318, 330)
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When switching the driving mode to sport mode while driving in D position. (P. 333)
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Restraining sudden start (Drive-Start Control)
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When the following unusual operation is performed, the engine output may be
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restrained.
• When the shift lever is shifted from R to D, D to R, N to R, P to D, or P to R (D
includes M) with the accelerator pedal depressed, a warning message appears on
the multi-information display. (P. 524)
• When the accelerator pedal is depressed too much while the vehicle is in reverse.
Shift lock system
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The shift lock system is a system to prevent accidental operation of the shift lever in start-
ing.
The shift lever can be shifted from P only when the engine switch is in IGNITION ON
mode and the brake pedal is being depressed.
GS350_300_GS F_OM_OM30J17E_(GE)
4-2. Driving procedures
231
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