2007 Lexus GS350 brake

96
2-1. Driving procedures
NOTICE
■While driving the vehicle
Do not use the accelerator pedal or depress accelerator and brake pedals together
to hold the vehicle on a hill.
■When parking the vehicle
Always put the shift lever in “P”. Failure to do so may cause the vehicle to move or
the vehicle may accelerate suddenly if the accelerator pedal is accidentally
depressed.
■Avoiding damage to vehicle parts
●Do not turn the steering wheel fully in either direction and hold it there for a long
time. 
Doing so may damage the power steering motor.
●When driving over bumps in the road, drive as slowly as possible to avoid damag-
ing the wheels, underside of the vehicle, etc.
■If you hear a squealing or scraping no ise (brake pad wear limit indicators)
Have your Lexus dealer check and replac e the brake pads as soon as possible.
The rotor damage can result if the pads are not replaced when needed.
Front brake only (GS430): Moderate levels of the brake pad and disc wear allow
enhanced front braking power. As a result , the discs may wear more quickly than
conventional brake discs. Therefore, when replacing the brake pads, Lexus recom-
mends that you also have the th ickness of the discs measured.
It is dangerous to drive the vehicle when the wear limits of the brake pads and/or
that of the brake discs are exceeded.
■If you get a flat tire while driving
A flat or damaged tire may cause the following situations. Hold the steering wheel
firmly and gradually press the brak e pedal to slow down the vehicle.
●It may be difficult to control your vehicle.
●The vehicle will make abnormal sounds.
●The vehicle will behave abnormally.
Replace a flat tire with a new one. ( P. 4 76 )

97
2-1. Driving procedures
2
When driving
Starting the engine
Modes can be switched by pressing the engine switch when carrying the
electronic key on your person. (The engine can be started in any mode by
operating the switch at the same time as depressing the brake pedal.)
■Changing engine switch mode
“OFF” mode
“A C C ” m o d e
Some electrical components
such as the audio system can be
used.
“IG-ON” mode
All electrical components can
be used.
■Starting the engine
Check that the parking brake is set.
Check that the shift lever is set in “P”.
Sit in the driver’s seat and firmly depress the brake pedal.
The engine switch indicator turns green.
Press the engine switch.
STEP1
STEP2
STEP3

100
2-1. Driving procedures
Transmission
Select a shift position appropriate for the driving conditions.
■Shifting the shift lever
While the engine switch
is in “IG-ON” mode,
depr
ess the brake pedal
and move the shift lever.

103
2-1. Driving procedures
2
When driving
■Downshifting restrictions in “S” mode
The shift lever cannot be downshifted if the following speeds are exceeded. (The
w
arning buzzer will sound twice in this situation.)
The maximum speeds can get lower when the engine is not warm such as in cold
climates or before warm-up.
■When driving with the cruise control syst em (or dynamic radar cruise control sys-
tem)
The engine brake will not operate in the “S” mode, e
ven when downshifting to “5” or
“4”. ( P. 1 2 4 , 127 )
■Snow mode automatic deactivation
Snow mode is automatically deactivated if the e
ngine switch is turned to “ACC” or
“IG-ON” mode after driving in snow mode.
■If the shift lever cannot be shifted from “P”
 P.
4 8 4
■If the indicator does not come on even after shifting the shift lever to “S”
This may indicate a malfunction in the automatic transmission system. Have the
v
ehicle inspected by your Lexus dealer immediately. 
(In this situation, the vehicle will operate as if the shift lever is in “D”.)
■AI-SHIFT
The AI-SHIFT automatically shifts the gear to
the optimal position according to the
driver's input and driving conditions. 
The AI-SHIFT automatically operates when th e
shift lever is in the D position. (Shift-
ing the shift lever to the S position cancels the function.)
Downshifting
Maximum speed
mph (km/h)
GS430GS350
5 4120 (194)124 (200)
4 388 (142)87 (141)
3 259 (95)56 (91)
2 124 (38)28 (45)

105
2-1. Driving procedures
2
When driving
Parking brake
NOTICE
■Before driving
Fully release the parking brake.
Driving the vehicle with the parking brake set will lead to brake components over-
heating, which may affect braking performance and increase brake wear.
Sets the parking brake* 
(Depressing the pedal again
releases the parking brake.)
*: Fully depress the parking
brake pedal with your left
foot while depressing the
brake pedal with your right
foot.
CanadaU.S.A.

117
2-3. Operating the lights and windshield wipers
2
When driving
AFS (Adaptive Front lighting System)
AFS improves visibility at intersectio ns and on curves by automatically
adjusting the level of the headlights according to vehicle speed and the
degree of the tire angle that are controlled by steering input.
Operates at speeds of 6 mph (10 km/h) or higher.
■ Deactivating AFS
Press the switch to turn it OFF.
The indicator turns on when
the AFS is deactivated.
■Daytime running light system
To make your vehicle more visible to other drivers, the headlights turn on automati -
cally (at a reduced intensity) whenever the engine is started and the parking brake
is
released. Daytime running lights are not designed for use at night.
■Headlight control sensor
The sensor may not function properly if an
object is placed on the sensor, or anything
that blocks the sensor is affixed to the wind-
shield. 
Doing so interferes with the sensor detecting
the level of ambient light and may cause the
automatic headlight control system to mal-
function.

125
2-4. Using other driving systems
2
When driving
■Cruise control can be set when
●The shift lever is in the “D” or “4”, “5”, or “6” range of “S”.
●Vehicle speed is between approximately 25 mph (40 km/h) and 125 mph
(200 km/h).
■Accelerating
The vehicle can be accelerated normally. After acceleration, the set speed
r
esumes.
■Automatic cruise control cancelation
The set speed is automatically canceled in any of the following situations.
●Actual vehicle speed falls more than 10 mph (16 km/h) below the preset vehicle
speed
●Actual vehicle speed is below 25 mph (40 km/h)
●VSC is activated
■If the cruise control indicator light flashes
Turn the “ON-OFF” button off once, and
then reactivate the system. 
If the cruise control speed cannot be set or i
f the cruise control cancels immediately
after being activated, there may be a malfun ction in the cruise control system. Have
the vehicle inspected by your Lexus dealer.
■ Canceling and resuming regular acceleration
Cancel
Push the lever towards you to
cancel cruise control.
The setting is also canceled
when th

e brake pedal is
depressed.
Resume
To resume cruise control and
return to the set speed, push the
lever up.

128
2-4. Using other driving systems
■Driving in the selected cruise control mode
Accelerate or decelerate to the
desired speed and press the
lever down to set.
■ A
djusting the speed setting
Increase speed
Decrease speed
Hold the lever until the desired
speed setting is displayed.
In the constant speed control
mode,
fine adjustment of the set
speed (approximately 1.0 mph
[1.6 km/h]) can be made by
lightly pressing the lever up or
down and releasing it.
■ Canceling and resuming the speed setting
Cancel
Push the lever towards you to
cancel cruise control.
The setting is also canceled
when depr
essing the brake
pedal.
Resume
To resume cruise control and
return to the set speed, push the
lever up.