Vsc Lexus GS450h 2009 Owner's Manual

13
GS_HV_U (OM30B44U)
April 27, 2009 10:09 am
Shift lever P. 152
Cigarette lighter P. 384
Ashtray P. 383
Shift lock override button P. 548
Cup holders P. 377
C
∗: If equipped
Seat heater/ventilator switches∗
P. 386
VSC OFF switch P. 216
Coin holder P. 377
Mode select switch P. 153
AVS switch P. 213
GS450h_HV_U.book Page 13 Monday, April 27, 2009 10:10 AM

181
2-4. Using other driving systems
2
When driving
GS_HV_U (OM30B44U)
April 27, 2009 10:09 am
■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
resumes.
■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
At this time, the memorized set speed is not retained.
●Actual vehicle speed is below 25 mph (40 km/h)
●Enhanced VSC is activated
GS450h_HV_U.book Page 181 Monday, April 27, 2009 10:10 AM

189
2-4. Using other driving systems
2
When driving
GS_HV_U (OM30B44U)
April 27, 2009 10:09 am
■The dynamic radar cruise can be set when
●The shift lever is in “D” or the “4”, “5” or “6” range of “S”.
●The vehicle’s speed is above approximately 27 mph (43 km/h).
■Accelerating
The vehicle can be accelerated normally. After acceleration, the set speed
resumes.
■Automatically canceling vehicle-to-vehicle distance control
Vehicle-to-vehicle distance control driving is automatically canceled in the follow-
ing situations.
●Actual vehicle speed falls below 25 mph (40 km/h)
●Enhanced VSC is activated
●The windshield wipers are operating at high speed
●The mode select switch is set to snow mode
●The sensor cannot operate correctly because it is covered in some way
Vehicle-to-vehicle distance control driving must be reset by turning the “ON-
OFF” button on again.
If vehicle-to-vehicle distance control driving is automatically canceled for any other
reason, there may be a malfunction in the system. Contact your Lexus dealer.
■Automatically canceling constant speed control
The set speed is automatically canceled in the following situations.
●Actual vehicle speed is more than 10 mph (16 km/h) below the preset vehicle
speed
●Actual vehicle speed falls below 25 mph (40 km/h)
●Enhanced VSC is activated
GS450h_HV_U.book Page 189 Monday, April 27, 2009 10:10 AM

214
2-4. Using other driving systems
GS_HV_U (OM30B44U)
April 27, 2009 10:09 am
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 prevents 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 suspensi on 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.
GS450h_HV_U.book Page 214 Monday, April 27, 2009 10:10 AM

215
2-4. Using other driving systems
2
When driving
GS_HV_U (OM30B44U)
April 27, 2009 10:09 am
When the Enhanced VSC/TRAC/hill-start assist control systems are
operatingIf 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.
■PCS (Pre-Collision System) (if equipped)
→ P. 221
■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.
GS450h_HV_U.book Page 215 Monday, April 27, 2009 10:10 AM

216
2-4. Using other driving systems
GS_HV_U (OM30B44U)
April 27, 2009 10:09 am
To disable TRAC and/or Enhanced VSCIf the vehicle gets stuck in fresh snow or mud, TRAC and Enhanced VSC
may reduce power from the engine to the wheels. You may need to turn
the system off to enable you to rock the vehicle in order to free it.
■ Turning off TRAC only
Quickly push and release the but-
ton to turn off TRAC.
The message “TRAC OFF”
appears on the multi-information
display.
Push the button again to turn the
system back on.
GS450h_HV_U.book Page 216 Monday, April 27, 2009 10:10 AM

217
2-4. Using other driving systems
2
When driving
GS_HV_U (OM30B44U)
April 27, 2009 10:09 am
■Turning off both TRAC and Enhanced VSC
Push and hold the button for more
than 3 seconds while the vehicle is
stopped to turn off TRAC and
Enhanced VSC.
The slip off indicator light should
come on and the message “TRAC
OFF” appears on the multi-infor-
mation display.
Push the button again to turn the
system back on.
GS450h_HV_U.book Page 217 Monday, April 27, 2009 10:10 AM

218
2-4. Using other driving systems
GS_HV_U (OM30B44U)
April 27, 2009 10:09 am
■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.
GS450h_HV_U.book Page 218 Monday, April 27, 2009 10:10 AM

220
2-4. Using other driving systems
GS_HV_U (OM30B44U)
April 27, 2009 10:09 am
CAUTION
■The hill-start assist control may not operate effectively when
●On steep inclines.
●On icy surfaces.
■When the Enhanced VSC is activated
The slip indicator light flashes and a warning buzzer sounds. Always drive carefully.
Reckless driving may cause an accident. Exercise particular care when the indica-
tor light flashes and a buzzer sounds.
■When TRAC and Enhanced VSC are off
Be especially careful and drive at a speed appropriate to the road conditions. As
these are systems to ensure vehicle stability and driving force, do not turn off TRAC
and Enhanced VSC unless necessary.
■Replacing tires
Make sure that all tires are of the same size, brand, tread pattern and total load
capacity. In addition, make sure that the tires are inflated to the specified tire pres-
sure level.
The ABS and Enhanced VSC will not function correctly if different tires are fitted on
the vehicle.
Contact your Lexus dealer for further information when replacing tires or wheels.
■Handling of tires and suspension
Using tires with any kind of problem or modifying the suspension will affect the driv-
ing assist systems, and may cause the system to malfunction.
GS450h_HV_U.book Page 220 Monday, April 27, 2009 10:10 AM

480
4-3. Do-it-yourself maintenance
GS_HV_U (OM30B44U)
April 27, 2009 10:09 am
FuseAmpereCircuit
23A/F15Fuel system
24INV W/P10Hybrid system
25IGCT No.120Hybrid system, IGCT No.2,
IGCT No.3
26FR FOG15Fog light
27FR TAIL10Tail light, rear side marker light
28WA S H20Windshield wipers and washer
29HORN10Horn
30H-LP UPR20Headlight high beam
31DC/DC140Charging system
32RAD FAN60Electric cooling fans
33LH J/B AM80
S/ROOF, FR P/SEAT LH, TV, A/C,
FUEL OPN, FR WIP, H-LP LVL,
FR S/HTR LH, A/C W/P
34E/G AM60H-LP CLN, FR CTRL-AM, DEICER,
STB AM
35HEATER50Air conditioning system
36DEFOG50Rear window defogger
37ABS230Enhanced VSC, ABS
38RH J/B-AM80
AM1, OBD, STOP SW, TI & TE,
FR P/SEAT RH, STR LOCK,
SECURITY, ECU-IG R, RH-IG,
F S/HTR RH, CIG, PWR OUTLET,
AIR SUS
GS450h_HV_U.book Page 480 Monday, April 27, 2009 10:10 AM