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Lexus GS430 - Page 387

Lexus GS430
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STARTING AND DRIVING
363
AI (Artificial Intelligence) shifting control
AI shifting control selects the most suitable shift range
automatically according to the driver’s operation and
driving condition.
AI shifting control operates automatically with the
selector lever in the “D” position. When the lever is moved
to the “S” position, this function will be canceled.
Shifting control on the slope: On inclines, you can drive
smoothly with reduced shifting quantity. On declines, the
vehicle will shift down automatically to obtain optimum engine
braking and reduce the driver’s foot braking load.
Automatic shifting point change control: The automatic
shifting point control is controlled in the following way to
respond to the driver’s operation.
When the accelerator is depressed quickly, the vehicle
downshifts rapidly in order to improve acceleration.
When the accelerator is quickly released, the gear position
is maintained in order to improve engine braking and
reacceleration capabilities.
During hard deceleration the vehicle downshifts rapidly in
order to improve engine braking and reacceleration
capabilities.
(b) Driving in “S” mode
G31025
1
“S” mode position
2
Upshifting
3
Downshifting
4
Shift range position indicator
You can change the shift range position in the “S” mode.
The shift range position can be switched between “6”
(sixth range) and “1” (first range) by moving the selector
lever up to the “+” side or down to the “–” side. The first
shift range position is “5” (fifth range) when the selector
lever is shifted to the “S” position.
However, if you move the lever to the “S” position in AI
shifting control, “5” (fifth range), “4” (fourth range) or “3”
(third range) will be the first shift range. This is because
the suitable shift range is selected depending on the
driving condition.

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