310 Lexus GS300h 2015 Owner's Manual

3104-5. Using the driving support systems
GS450h_300h_OM_OM30F00E_(EE)
Pulling the lever toward you cancels
the speed control.
The speed control is also canceled when
the brake pedal is depressed.
(When the vehicle has been stopped by
system control, depressing the brake
pedal does not cancel the setting.)
Pushing the lever up resumes the
cruise control and returns vehicle
speed to the set speed.
However, when a vehicle ahead is not detected, cruise control does not resume when
the vehicle speed is approximately 40 km/h (25 mph) or less.
When your vehicle is too close to a
vehicle ahead, and sufficient automatic
deceleration via the cruise control is
not possible, the display will flash and
the buzzer will sound to alert the driver.
An example of this would be if another
driver cuts in front of you while you are
following a vehicle. Depress the brake
pedal to ensure an appropriate vehicle-
to-vehicle distance.
■Wa r n i n g s m a y n o t o c c u r w h e n
In the following instances, warnings may not occur even when the vehicle-to-
vehicle distance is small.
●When the speed of the preceding vehicle matches or exceeds your vehicle
speed
●When the preceding vehicle is traveling at an extremely slow speed
●Immediately after the cruise control speed was set
●When depressing the accelerator pedal
Canceling and resuming the speed control
1
2
Approach warning (vehicle-to- vehicle distance control mode)

3134-5. Using the driving support systems
4
Driving
GS450h_300h_OM_OM30F00E_(EE)
■Automatic cancelation of constant speed control mode
Constant speed control mode is automatically canceled in the following situations:
●Actual vehicle speed is more than approximately 16 km/h (10 mph) below the set vehi-
cle speed.
●Actual vehicle speed falls below approximately 40 km/h (25 mph).
●VSC is activated.
●TRC is activated for a period of time.
●When the VSC or TRC system is turned off by pressing the VSC OFF switch.
●Pre-crash braking is activated.
If constant speed control mode is automatically canceled for any other reason, there may
be a malfunction in the system. Contact any authorized Lexus dealer or repairer, or
another duly qualified and equipped professional.
■Warning messages and buzzers for dynamic radar cruise control with full-speed range
Warning messages and buzzers are used to in dicate a system malfunction or to inform
the driver of the need for caution while driv ing. If a warning message is shown on the
multi-information display, read the message and follow the instructions. ( →P. 4 8 2 )
■When the sensor may not be correctly detecting the vehicle ahead
In the case of the following and depending on the conditions, operate the brake pedal
when deceleration of the system is insufficient or operate the accelerator pedal when
acceleration is required.
As the sensor may not be able to correctly detect these types of vehicles, the approach
warning ( →P. 310) may not be activated.
●Vehicles that cut in suddenly
●Vehicles traveling at low speeds
●Vehicles that are not moving in the same lane
●Vehicles with small rear ends (traile rs with no load on board, etc.)
●Motorcycles traveling in the same lane
●When water or snow thrown up by the surrounding vehicles hinders the detecting of
the sensor

618Alphabetical index
GS450h_300h_OM_OM30F00E_(EE)
Trunk ........................................................... 146Jam protection function..................... 151
Luggage security system................ 148
Open trunk warning
message..............................................482
Power trunk lid......................................146
Smart entry & start system ..............146
Trunk closer switch ............................. 147
Trunk easy closer................................ 148
Trunk features...................................... 394
Trunk grip ................................................ 147
Trunk light ............................................... 148
Trunk opener main switch ............. 148
Trunk opener switch ..........................146
Wireless remote control ..................134
Trunk light ................................................. 148
Trunk light ............................................... 148
Wattage..................................................578
Turn signal lights....................................230 Replacing light bulbs........... 459, 465
Turn signal lever .................................230
Wattage..................................................578
USB port
*
Vanity lights ............................................. 397 Vanity lights .......................................... 397
Wattage..................................................578
Vanity mirrors ........................................ 397
Vanity lights .......................................... 397 Variable Gear Ratio Steering
(VGRS) ................................................. 344
Function.................................................. 344
Warning message ............................ 482
VDIM (Vehicle Dynamics Integrated Management) .............. 345
Vehicle identification number......... 567
Vehicle Stability Control (VSC) .................................................... 344
Ventilators (seat ventilators) ........... 382
VGRS (Variable Gear Ratio Steering) ............................................... 344
Function.................................................. 344
Warning message ............................ 482
VSC (Vehicle Stability Control) ................................................ 344
Warning buzzers Approach warning ................. 310, 322
Brake system ....................................... 476
Downshifting........................................ 228
Key reminder ......................................... 514
Lexus parking assist-sensor
*
Open door ........................................... 484
Open hood .......................................... 484
Open moon roof ............................... 499
Open trunk........................................... 484
Open window..................................... 499
Seat belt reminder ............................ 478
Warning label ............................................79
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