ABS Lexus GS200t 2015 User Guide

3744-5. Using the driving support systems
GS350_200t_GS F_OM_OM30E87E_(EE)
Driving assist systems
◆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
◆VSC (Vehicle Stability Control)
Helps the driver to control skidding when swerving suddenly or turning on
slippery road surfaces
◆VSC+ (Vehicle Stability Control+)
Provides cooperative control of the ABS, TRC, VSC and EPS. Helps to main-
tain directional stability when swerving on slippery road surfaces by control-
ling steering performance.
◆TRC (Traction Control)
Helps to maintain drive power and prevent the drive wheels from spinning
when starting the vehicle or accelerating on slippery roads
To help enhance driving safety and performance, the following systems oper-
ate 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.

3754-5. Using the driving support systems
4
Driving
GS350_200t_GS F_OM_OM30E87E_(EE)
◆Hill-start assist control
Helps to prevent the vehicle from rolling backward when starting on an
incline.
◆EPS (Electric Power Steering)
Employs an electric motor to reduce the amount of effort needed to turn the
steering wheel
◆AVS (Adaptive Variable Suspension system) (if equipped)
By independently controlling the damping force of the shock absorbers for
each of the 4 wheels according to the road and driving conditions, this system
helps riding comfort with superior steering stability, and helps good vehicle
posture
When SPORT S+ mode is selected by the driving mode select switch, the
damping force is suitable for sporty driving ( →P. 3 5 7 )
◆VDIM (Vehicle Dynamics Integrated Management)
Provides integrated control of the ABS, brake assist, TRC, VSC, hill-start
assist control and EPS systems
Helps to maintain vehicle stability when swerving on slippery road surfaces by
controlling the brakes, engine output, steering assist, and steering ratio
◆Emergency brake signal
When the brakes are applied suddenly, the stop lights automatically flash to
alert the vehicle behind
The slip indicator light will flash while
the TRC/VSC systems are operating.
When the TRC/VSC systems are operating

3784-5. Using the driving support systems
GS350_200t_GS F_OM_OM30E87E_(EE)
■When the “TRC OFF” indicator light comes on even if has not been pressed (GS F)
TRC and hill-start assist control cannot be operated. Contact any authorized Lexus
dealer or repairer, or another duly qualified and equipped professional.
■Sounds and vibrations caused by the ABS, brake assist, VSC, Hill-start assist control
and TRC systems
●A sound may be heard from the engine compartment when the brake pedal is
depressed repeatedly, when the engine is started or just after the vehicle begins to
move. This sound does not indicate that a ma lfunction has occurred in any of these sys-
tems.
●Any of the following conditions may occu r when the above systems are operating.
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 slig htly after the ABS is activated.
• The brake pedal may move down s lightly after the ABS is activated.
■EPS operation sound
When the steering wheel is operated, a motor sound (whirring sound) may be heard.
This does not indicate a malfunction.
■Automatic reactivation of TRC and VSC systems
After turning the TRC and VSC systems off, the systems will be automatically re-enabled
in the following situations:
●When the engine switch is turned off
●If only the TRC system is turned off, the TRC will turn on when vehicle speed increases
If both TRC and VSC systems are turned off, automatic re-enabling will not occur when
vehicle speed increases.
■Reduced effectiveness of the EPS system
The effectiveness of the EPS system 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 engine off. The EPS system should return to normal
within 10 minutes.
■Operating conditions of hill-start assist control
When the following four conditions are met, the hill-start assist control will operate;
●The shift lever is in a position other than N or P (when starting off forward/backward on
an upward incline).
●The vehicle is stopped.
●The accelerator pedal is not depressed.
●The parking brake is not engaged.

3804-5. Using the driving support systems
GS350_200t_GS F_OM_OM30E87E_(EE)
WA R N I N G
■The ABS does not operate effectively when
●The limits of tire gripping performance have been exceeded (such as excessively
worn tires on a snow covered road).
●The vehicle hydroplanes while driving at high speed on wet or slick roads.
■Stopping distance when the ABS is operating may exceed that of normal conditions
The ABS is not designed to shorten the vehi cle’s stopping distance. Always maintain a
safe distance from the vehicle in front of you, especially 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 uneven surfaces
■TRC may not operate effectively when
Directional control and power may not be achievable while driving on slippery road
surfaces, even if the TRC system is operating.
Drive the vehicle carefully in conditions where stability and power may be lost.
■Hill-start assist control does not operate effectively when
●Do not overly rely on the hill-start assist control. The hill-start assist control may not
operate effectively on steep inclines and roads covered with ice.
●Unlike the parking brake, hill-start assist co ntrol is not intended to hold the vehicle
stationary for an extended period of time. Do not attempt to use hill-start assist con-
trol to hold the vehicle on an incline, as doing so may lead to an accident.
■When the VSC is activated
The slip indicator light flashes. Always dr ive carefully. Reckless driving may cause an
accident. Exercise particular care when the indicator light flashes.
■When the TRC/VSC systems are turned off
Be especially careful and drive at a speed appropriate to the road conditions. As these
are the systems to help ensure vehicle stability and driving force, do not turn the TRC/
VSC systems off unless necessary.

3814-5. Using the driving support systems
4
Driving
GS350_200t_GS F_OM_OM30E87E_(EE)
WA R N I N G
■Expert mode precautions (GS F)
●Do not use on public roads.
●Use only when the road conditions and safety of the surrounding area can be
ensured.
●Proper use of expert mode requires a professional level of driving skill. When using
expert mode, always check the road conditions and surrounding area and drive more
carefully than usual.
■Replacing tires
Make sure that all tires are of the specif ied size, brand, tread pattern and total load
capacity. In addition, make sure that the tires are inflated to the recommended tire infla-
tion pressure level.
The ABS, TRC and VSC systems will not function correctly if different tires are installed
on the vehicle.
Contact any authorized Lexus dealer or repairer, or another duly qualified and
equipped professional for further information when replacing tires or wheels.
■Handling of tires and the suspension
Using tires with any kind of problem or modi fying the suspension will affect the driving
assist systems, and may cause a system to malfunction.

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6-3. Do-it-yourself maintenance
Maintenance and care
GS350_200t_GS F_OM_OM30E87E_(EE)
Air conditioning filter
Turn the engine switch off.
Open the glove box. Lift up the side
with the stay, disconnect the stay
tabs and remove the partition by
pulling horizontally.
Press the tabs and remove the filter
cover.
Press the tabs and remove the filter
case.
The air conditioning filter must be changed regularly to maintain air condi-
tioning efficiency.
Removal method
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4946-3. Do-it-yourself maintenance
GS350_200t_GS F_OM_OM30E87E_(EE)
When installing, reverse the steps listed.
After installing the bulb base, secure the cord with the clips and if replacing the left
side bulb, make sure to install the bolt for the washer fluid filler opening in its origi-
nal position.
■Outer foot lights
Press the upper part of the out-
side rear view mirror to tilt the
mirror face upward, and apply
protective tape to the lower part
of the mirror cover.
Insert 2 flathead screwdrivers
wrapped in protective tape, and
disconnect the tabs behind the
mirror.
Pry the mirror out toward you, dis-
connecting the 2 tabs at a time.
Work carefully, ensuring that you do
not drop the mirror.
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XRight sideXLeft side
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4966-3. Do-it-yourself maintenance
GS350_200t_GS F_OM_OM30E87E_(EE)
After installing the new bulb,
secure the socket to the light
body.
When inserting the socket, align the
marks printed on the light body and
the socket.
Install the visor cover on the mir-
ror frame, secure it with a screw,
and install the side turn signal light
and outer foot light.
Use only the screw position shown in
the illustration.
Side turn signal light: Align the tabs
on the light and th e cover and install.
Outer foot light: Interlock the tabs in
the groove of the light body with
those on the cover, and secure.
Disconnect the tabs, and sepa-
rate the top and bottom of the
rear side cover of the mirror.
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497 6-3. Do-it-yourself maintenance
6
Maintenance and care
GS350_200t_GS F_OM_OM30E87E_(EE)
Install the cover of the back end
of the mirror, installing the lower
side and the upper side in that
order.
When installing the lower side of the
cover, insert the side turn signal light
pin into the hole in the cover.
Secure the cover with screws and
reconnect the connectors back
together.
Secure the cords by returning them
to the hooks as they were.
Align the tabs, and secure the
mirror by pushing in each diago-
nally-opposite pair of tabs in
order.
Make sure to insert the tabs in order
as shown in the illustration, and push
them in until a click is heard.
If you do not hear the click, do not
force the tabs in. Instead, remove the
mirror and check that the tabs are
aligned.
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5137-2. Steps to take in an emergency
7
When trouble arises
GS350_200t_GS F_OM_OM30E87E_(EE)
ABS warning lightIndicates a malfunction in:
•The ABS; or
• The brake assist system
→ Have the vehicle inspected by any authorized Lexus dealer or
repairer, or another duly qualified and equipped professional
immediately.
Electric power steering system warning light (warning buzzer)
Indicates a malfunction in the EPS (Electric Power Steering) sys-
tem
→ Have the vehicle inspected by any authorized Lexus dealer or
repairer, or another duly qualified and equipped professional
immediately.
(Flashes)
(If equipped)
PCS (Pre-Crash Safety system) warning light
●When the warning light flashes (and a buzzer sounds):
Indicates a malfunction in the PCS (Pre-Crash Safety system)
→ Have the vehicle inspected by any authorized Lexus dealer or
repairer, or another duly qualified and equipped professional
immediately.
●When the warning light flashes (and a buzzer does not sound):
Indicates that the PCS (Pre-Crash Safety system) is temporarily
unavailable, possibly due to either of the following:
• An area around the radar sensor or camera sensor being dirty
or covered with condensation, ice, stickers, etc.
→ Clear the dirt, condensation, ice, stickers, etc.
(→ P. 287, 308, 317)
• Radar sensor or camera sensor being outside of its operational
condition range. (temperature etc.)
→ If operational condition (tempera ture etc.) is satisfied, PCS
(Pre-Crash Safety system) becomes to be available.
●When the warning light is illuminated:
Either the VSC (Vehicle Stability Control) system or PCS (Pre-
Crash Safety system) is disabled or both are disabled.
→ To enable the PCS (Pre-Crash Safety system), enable both
the VSC system and PCS (Pre-Crash Safety system).
(→ P. 3 0 4 , 3 7 7 )
Slip indicator
Indicates a malfunction in:
• The VSC system;
• The TRC system; or
• The hill-start assist control system
→ Have the vehicle inspected by any authorized Lexus dealer or
repairer, or another duly qualified and equipped professional
immediately.
The light will flash when the VSC, TRC or ABS system is operating.
Warning lightWarning light/Details/Actions