stop start Lexus GS450h 2010 Using The Audio System / LEXUS 2010 GS450H (OM30C81U) User Guide

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2-1. Driving procedures
GS_HV_U (OM30C81U)
October 13, 2015 12:41 pm
■For efficient use
●Put the shift lever into “D” when driving
In the “N” position, the gasoline engine operates but electricity cannot be gen-
erated. The hybrid battery (traction battery) will be discharged requiring unnec-
essary engine power to recharge.
●Drive your vehicle smoothly
Avoid abrupt acceleration and deceleration. Gradual acceleration and decel-
eration will make more effective use of the traction motor without having to use
gasoline engine power.
●Avoid repeated acceleration
Repeated acceleration consumes hybrid battery (traction battery) power,
resulting in poor acceleration. Battery power can be restored by driving with
the accelerator pedal slightly released.
●Put the shift lever into “P” when parking
In the “N” position, the hybrid battery (traction battery) does not recharge.
Leaving the shift lever in the “N” position for an extended period of the time may
discharge the hybrid battery. The vehicle cannot run if the hybrid battery is dis-
charged.
CAUTION
■When starting the vehicle
Always keep your foot on the brake pedal while stopped with the hybrid system
operating. This prevents the vehicle from creeping.

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2-1. Driving procedures
GS_HV_U (OM30C81U)
October 13, 2015 12:41 pm
Power (ignition) switch
Performing the following operations when carrying the electronic key on
your person starts the hybrid system or changes “POWER” switch modes.
■Starting the hybrid system
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 “POWER” switch indicator turns green.
Press the “POWER” switch.
After a few seconds, the
“READY” light will flash and
come on with a beep sound.
The vehicle can move when the
“READY” light is on, even if the
engine is stopped.
The hybrid system can be
started from any mode.
STEP1
STEP2
STEP3
STEP4

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2-1. Driving procedures
2
When driving
GS_HV_U (OM30C81U)
October 13, 2015 12:41 pm
■Electronic key battery depletion
P. 4 7
■When the electronic key battery is discharged
P. 4 9 4
■Conditions affecting operation
P. 4 5
CAUTION
■When starting the hybrid system
Always start the hybrid system while sitting in the driver’s seat. Do not press the
accelerator pedal while starting the hybrid system under any circumstances.
Doing so may cause an accident resulting in death or serious injury.
■Stopping the hybrid system in an emergency
If you want to stop the hybrid system in an emergency while driving the vehicle,
push and hold the “POWER” switch for more than 3 seconds.
However, do not touch the "POWER" switch while driving except in an emergency.
Turning the hybrid system off while driving will not cause loss of steering or braking
control, but the power assist to these systems will be lost. This will make it more diffi-
cult to steer and brake, so you should pull over and stop the vehicle as soon as it is
safe to do so.
NOTICE
■To prevent 12 volt battery discharge
Do not leave the “POWER” switch in ACCESSORY or ON mode for long periods
without the hybrid system on.
■When starting the hybrid system
●Do not race the hybrid system.
●If the hybrid system becomes difficult to start or stalls frequently, have the hybrid
system checked immediately.

214
2-4. Using other driving systems
GS_HV_U (OM30C81U)
October 13, 2015 12:41 pm
Driving assist systems
To help enhance driving safety and performance, the following systems
operate automatically in response to various driving situations. Be aware,
however, that these systems are supplementary and should not be relied
upon too heavily when operating the vehicle.
■ABS (Anti-lock Brake System)
Helps to prevent wheel lock when the brakes are applied suddenly, or if
the brakes are applied while driving on a slippery road surface.
■Brake assist
Generates an increased level of braking force after the brake pedal is
depressed, when the system detects a panic stop situation.
■Enhanced VSC (Enhanced Vehicle Stability Control)
Helps the driver to control skidding when swerving suddenly or turning on
slippery road surfaces.
■TRAC (Traction Control)
Helps to maintain drive power and prevent the rear wheels from spinning
when starting the vehicle or accelerating on slippery roads.
■Hill-start assist control
Helps prevent the vehicle from rolling backwards when starting on an
incline or slippery slope. It operates for approximately 5 seconds at maxi-
mum.
■EPS (Electric Power Steering)
Employs an electric motor to reduce the amount of effort needed to turn
the steering wheel.
■Active stabilizer suspension system (if equipped)
Reduces sway when cornering according to steering wheel movement
and the selected suspension damping mode, in order to maintain a stable
vehicle posture.
■PCS (Pre-Collision System) (if equipped)
P. 221

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2-4. Using other driving systems
2
When driving
GS_HV_U (OM30C81U)
October 13, 2015 12:41 pm
When the Enhanced VSC/TRAC/hill-start assist control systems are
operating
If the vehicle is in danger of slip-
ping, rolling backwards when
starting on an incline, or if the rear
wheels spin, the slip indicator light
flashes to indicate that the
Enhanced VSC/TRAC/hill-start
assist control systems have been
engaged.
A buzzer (intermittent) sounds to
indicate that Enhanced VSC is
operating.
The stop lights and high mounted
stoplight turn on when the hill-start
assist control system is operating.
The slip indicator light flashes as
well when ABS is operating.
■VGRS (Variable Gear Ratio Steering)
Adjusts the wheel turning angle in accordance with the vehicle speed and
steering wheel movement.
■VDIM (Vehicle Dynamics Integrated Management)
Provides integrated control of the ABS, Enhanced VSC, TRAC, hill-start
assist control, VGRS and EPS systems.
Helps to maintain vehicle stability when swerving on slippery road sur-
faces by controlling the brakes, hybrid output, and the movement of the
front wheels.

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2-4. Using other driving systems
GS_HV_U (OM30C81U)
October 13, 2015 12:41 pm
■Automatic reactivation of TRAC and Enhanced VSC
Turning the “POWER” switch OFF after turning off the TRAC and Enhanced VSC
systems will automatically re-enable them.
■Automatic TRAC reactivation
If only the TRAC system is turned off, the TRAC system will turn on when the vehi-
cle speed increases.
■Automatic TRAC and Enhanced VSC reactivation
If the TRAC and Enhanced VSC systems are turned off, the systems will not turn on
even when the vehicle speed increases.
■Sounds and vibrations caused by the ABS, brake assist, Enhanced VSC, TRAC,
hill-start assist control and VGRS systems
●A sound may be heard from the engine compartment when the hybrid system is
started or just after the vehicle begins to move. This sound does not indicate that
a malfunction has occurred in any of these systems.
●Any of the following conditions may occur when the above systems are operat-
ing. None of these indicates that a malfunction has occurred.
• Vibrations may be felt through the vehicle body and steering.
• A motor sound may be heard after the vehicle comes to a stop.
• The brake pedal may pulsate slightly after the ABS is activated.
• The brake pedal may move down slightly after the ABS is activated.
■Hill-start assist control operating conditions
This system comes into operation under the following conditions after the brake
pedal has been depressed and the vehicle has come to a stop:
●The shift lever is in the “D” or “S”.
●The system has detected that the vehicle is moving backwards.
■EPS operation sound
When the steering wheel operates, a motor sound (whirring sound) may be heard.
This does not indicate a malfunction.

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2-4. Using other driving systems
2
When driving
GS_HV_U (OM30C81U)
October 13, 2015 12:41 pm
■Reduced effectiveness of EPS
The effectiveness of EPS is reduced to prevent the system from overheating when
there is frequent steering input over an extended period of time. The steering wheel
may feel heavy as a result. Should this occur, refrain from excessive steering input or
stop the vehicle and turn the hybrid system off. The system should return to normal
about 10 minutes.
■VGRS is disabled in the following situations
●During stopping or the steering wheel has been moved for a long time while
driving at lower speeds.
●After the hybrid system is restarted at less than -22°F (-30°C).
CAUTION
Any of the following conditions may result in an accident which could cause death or
serious injury:
■The ABS does not operate effectively when
●The limits of tire gripping performance have been exceeded.
●The vehicle hydroplanes while driving at high speed on a wet or slick road.
■Stopping distance when the ABS is operating will exceed that of normal condi-
tions
The ABS is not designed to shorten the vehicle’s stopping distance. Always main-
tain a safe distance from the vehicle in front of you in the following situations.
●When driving on dirt, gravel or snow-covered roads
●When driving with tire chains
●When driving over bumps in the road
●When driving over roads with potholes or roads with uneven roads
■TRAC may not operate effectively when
Directional control and power may not be achievable while driving on slippery road
surfaces, even if the TRAC is operating. 
Do not drive the vehicle in conditions where stability and power may be lost.

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4-3. Do-it-yourself maintenance
4
Maintenance and care
GS_HV_U (OM30C81U)
October 13, 2015 12:41 pm
CAUTION
■When raising your vehicle
Make sure to observe the following to reduce the possibility of death or serious
injury.
●When using a floor jack, follow the instructions of the manual provided with the
jack.
●Do not use the jack that was supplied with your vehicle.
●Do not put any part of your body or get underneath the vehicle supported only by
the floor jack.
●Always use floor jack and/or automotive jack stands on a solid, flat, level surface.
●Do not start the hybrid system while the vehicle is supported by the floor jack.
●Stop the vehicle on level firm ground, firmly set the parking brake and put the shift
lever in “P”.
●Make sure to set the floor jack properly at the jack point.
Raising the vehicle with an improperly positioned floor jack will damage the vehi-
cle and may cause the vehicle to fall off the floor jack.
●Do not raise the vehicle while someone is in the vehicle.
●When raising the vehicle, do not place any objects on top of or underneath the
floor jack.
●Lift up the vehicle using a floor jack such as
the one shown in the illustration.

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4-3. Do-it-yourself maintenance
4
Maintenance and care
GS_HV_U (OM30C81U)
October 13, 2015 12:41 pm
FuseAmpereCircuit
7AIR SUS20AV S
8PWR OUTLET15Po w e r o u t l e t
9CIG15Cigarette lighter
10ACC7. 5
Audio system, smart access system
with push-button start, touch screen,
rear view monitor system
11IGN10
Smart access system with push-but-
ton start, SRS airbag system, stop-
lights, hybrid system, steering lock
system, electronically controlled
brake system, front passenger occu-
pant classification system ECU
12GAUGE7. 5Gauges and meters
13STR LOCK25Steering lock system
14SECURITY7. 5Smart access system with push-but-
ton start
15TI & TE20Tilt and telescopic steering
16AM17. 5
17STOP SW7. 5Stoplights, shift lock system
18OBD7. 5On-board diagnosis system
19FR P/SEAT RH30Po w e r s e a t

When trouble arises5
521
GS_HV_U (OM30C81U)
January 28, 2010 11:33 am
5-1. Essential information
Emergency flashers............... 522
If your vehicle needs 
to be towed ............................ 523
If you think something is 
wrong ....................................... 531
Event data recorder .............. 5325-2. Steps to take in an 
emergency
If a warning light turns 
on or a warning buzzer 
sounds..................................... 534
If a warning message is 
displayed................................ 543
If you have a flat tire (Vehicles 
with standard tires) ............. 560
If you have a flat tire (Vehicles 
with run-flat tires)................ 570
If the hybrid system will 
not start .................................. 572
If the shift lever cannot be 
shifted from “P”.................... 573
If you lose your keys ............... 574
If the electronic key does not 
operate properly .................. 575
If the 12 volt battery is 
discharged ............................ 578
If your vehicle overheats ...... 581
If the vehicle becomes 
stuck........................................ 584
If your vehicle has to be stopped 
in an emergency .................. 586