2017 Lexus GS F steering

5227-2. Steps to take in an emergency
GS350_200t_GS F_OM_OM30F83E_(EE)
■Electric power steering system warning light (warning buzzer)
When the battery charge becomes insufficient or the voltage temporarily drops, the
electric power steering system warning lig ht may come on and the warning buzzer may
sound.
■When the tire pressure warning light comes on
Carry out the following procedure after the tire temperature has lowered sufficiently.
●Check the tire inflation pressure and adjust to the appropriate level.
●If the warning light does not go out even afte r several minutes, check that the tire infla-
tion pressure is at the specifie d level and carry out initialization.
The warning light may come on again if the above operations are conducted without first
allowing the tire temperature to lower sufficiently.
■The tire pressure warning light may come on due to natural causes
The tire pressure warning light may come on due to natural causes such as natural air
leaks and tire inflation pressure changes caused by temperature. In this case, adjusting
the tire inflation pressure will turn off the warning light (after a few minutes).
■When a tire is replaced with a spare tire
Vehicles with a compact spare tire: The comp act spare tire is not equipped with a tire
pressure warning valve and transmitter. If a tire goes flat, the tire pressure warning light
will not turn off even though the flat ti re has been replaced with the spare tire.
Vehicles with full-size spare tire: The spare tire is also equipped with a tire pressure warn- ing valve and transm itter. The tire pressure warning light will turn on if the tire inflation
pressure of the spare tire is low. If a tire goes flat, the tire pressure warning light will not
turn off even though the flat tire has been replaced with the spare tire.
■Conditions that the tire pressure warning system may not function properly  P. 476
■If the tire pressure warning light frequently comes on after blinking for 1 minute
If the tire pressure warning light frequently comes on after blinking for 1 minute when the
engine switch is turned to IGNITION ON mode, have it checked by any authorized
Lexus retailer or Lexus authorized repairer, or any reliable repairer.
■Warning buzzer
In some cases, the buzzer may not be heard because of noisy place or an audio sound.

523
7-2. Steps to take in an emergency
7
When trouble arises
GS350_200t_GS F_OM_OM30F83E_(EE)
WARNING
■If both the ABS and the brake system warning lights remain on
Stop your vehicle in a safe place immediately and contact any authorized Lexus retailer
or Lexus authorized repairer, or any reliable repairer. The vehicle will become
extremely unstable during braking, and the ABS system may fail, which could cause an
accident resulting in death or serious injury.
■When the electric power steering system warning light comes on
The steering wheel may become extremely heavy.
If the steering wheel becomes heavier than us ual when operating, hold firmly and oper-
ate using more force than usual.
■If the tire pressure warning light comes on
Be sure to observe the following precautions. Failure to do so could cause a loss of
vehicle control and result in death or serious injury.
●Stop your vehicle in a safe place as soon as possible. Adjust the tire inflation pressure
immediately.
●If the tire pressure warning light comes on even after tire inflation pressure adjust-
ment, it is probable that you have a flat tire. Check the tires. If a tire is flat, change it
with the spare tire and have the flat tire repaired by the nearest any authorized Lexus
retailer or Lexus authorized repa irer, or any reliable repairer.
●Avoid abrupt maneuvering and braking. If the vehicle tires deteriorate, you could lose
control of the steering wheel or the brakes.
■If a blowout or sudden air leakage should occur
The tire pressure warning system may not activate immediately.
NOTICE
■To ensure the tire pressure warning system operates properly
Do not install tires with different specifications or makers, as the tire pressure warning
system may not operate properly.

525
7-2. Steps to take in an emergency
7
When trouble arises
GS350_200t_GS F_OM_OM30F83E_(EE)
Warning message and warning buzzer list
Warning messageDetails/Actions
(If equipped)
Indicates that there is a high possibility of a frontal colli-
sion, or that the pre-crash braking function is operating
At the same time, will appear on the head-
up display.
A buzzer also sounds.
 Avoid the collision by decelerating using the brakes
or taking other evasive actions.
(If equipped)
Indicates that your vehicle is nearing the vehicle ahead
(in vehicle-to-vehicle distance control mode)
At the same time, will appear on the head-up dis-
play (the image flashes).
A buzzer also sounds.
 Slow the vehicle by applying the brakes.
(If equipped)
Indicates that the vehicle has deviated from the lane
(while the LKA [Lane-Keeping Assist] or LDA [Lane
Departure Alert with steering control] system are oper-
ating)
The lane line on the side the vehicle has deviated from
flashes in amber.
At the same time, will appear on the head-
up display (the image flashes).
A buzzer also sounds.
 Check around the vehicle and back to inside of the
lane lines.

5307-2. Steps to take in an emergency
GS350_200t_GS F_OM_OM30F83E_(EE)
Indicates that the shift position was changed and Drive-
Start Control was operated while depressing the accel-
erator pedal
A buzzer also sounds.
 Momentarily release the accelerator pedal.
Indicates an attempt was made to shift to 1st gear with
the shift position in M wh ile on a slippery surface
The vehicle will not shift down from 2nd gear.
A buzzer also sounds.
 Drive the vehicle in 2nd gear or higher.
(If equipped)
Indicates that the LDA (Lane Departure Alert with steer-
ing control) system has dete rmined that the driver does
not have their hands on the steering wheel while the
steering control function is on  Firmly hold the steering wheel.
Warning messageDetails/Actions
(Flashes)

531
7-2. Steps to take in an emergency
7
When trouble arises
GS350_200t_GS F_OM_OM30F83E_(EE)
(If equipped)
Indicates that the LKA (Lane- Keeping Assist) system has
determined that the driver does not have their hands on
the steering wheel while the steering control function is on  Firmly hold the steering wheel.
(If equipped)
Indicates that steering control function is temporarily
canceled due to the LDA (Lane Departure Alert with steering control) system determining that the driver
does not have their hands on the steering wheel while
the steering control function is on  Firmly hold the steering wheel.
(If equipped)
Indicates that steering control function is temporarily
canceled due to the LKA (L ane-Keeping Assist) system
determining that the driver does not have their hands on
the steering wheel while the steering control function is on A buzzer also sounds.
 Firmly hold the steering wheel.
Warning messageDetails/Actions

535
7-2. Steps to take in an emergency
7
When trouble arises
GS350_200t_GS F_OM_OM30F83E_(EE)
(If equipped)
Indicates that a Blind Spot Monitor sensor or the sur-
rounding area on the bumper is dirty or covered with ice
A buzzer also sounds.
 Clean the sensor and its surrounding area on the
bumper.
Indicates a malfunction in the cruise control system or
dynamic radar cruise control system (if equipped)
Press the “ON/OFF” button once to deactivate the
system, and then press the button again to reactivate the system.
A buzzer also sounds.
 Have the vehicle inspected by any authorized Lexus
retailer or Lexus authorized repairer, or any reliable
repairer.
(If equipped)
Indicates a malfunction in th e dynamic radar cruise con-
trol with full-speed range
Depress the brake pedal.
A buzzer also sounds.
 Have the vehicle inspected by any authorized Lexus
retailer or Lexus authorized repairer, or any reliable
repairer.
(If equipped)
Indicates a malfunction in the LDA (Lane Departure
Alert with steering control) system
A buzzer also sounds.
 Have the vehicle inspected by any authorized Lexus
retailer or Lexus authorized repairer, or any reliable
repairer.
Warning messageDetails/Actions

539
7-2. Steps to take in an emergency
7
When trouble arises
GS350_200t_GS F_OM_OM30F83E_(EE)
(If equipped)
Indicates a malfunction in the VGRS (Variable Gear
Ratio Steering)
A buzzer also sounds.
 Have the vehicle inspected by any authorized Lexus
retailer or Lexus authorized repairer, or any reliable
repairer.
(If equipped)
Indicates a malfunction in the DRS (Dynamic Rear
Steering)
A buzzer also sounds.
 Have the vehicle inspected by any authorized Lexus
retailer or Lexus authorized repairer, or any reliable
repairer.
(GS350/GS200t only)
Indicates a malfunction in the electronically controlled
brake system
A buzzer also sounds.
 Immediately stop the vehicle in a safe place and
contact any authorized Lexus retailer or Lexus
authorized repairer, or any reliable repairer. Con-
tinuing to drive in this condition is dangerous.
Indicates an attempt was made to engage the parking
brake while driving
A buzzer also sounds.
 Press the parking brake switch. If the warning mes-
sage is still displayed, have the vehicle inspected by
any authorized Lexus retailer or Lexus authorized
repairer, or any reliable repairer.
Indicates a malfunction in the parking brake system
A buzzer also sounds.
 Press the parking brake switch. If the warning mes-
sage is still displayed, have the vehicle inspected by
any authorized Lexus retailer or Lexus authorized
repairer, or any reliable repairer.
Warning messageDetails/Actions

5407-2. Steps to take in an emergency
GS350_200t_GS F_OM_OM30F83E_(EE)
(If equipped)
Indicates that the LDA (Lane Departure Alert with steer-
ing control) system cannot be used as the vehicle speed
is approximately 50 km/h (32 mph) or lessDrive the vehicle at approximately 50 km/h
(32 mph) or more.
(If equipped)
Indicates that LDA (Lane Departure Alert with steering
control) system cannot be used due to the vehicle speed
being too high Slow down.
(If equipped)
Indicates that LKA (Lane-Keeping Assist) system cannot
be used due to the vehicle speed being too high Slow down.
Indicates that the engine switch is turned off or turned to
ACCESSORY mode and the driver’s door is opened
while the lights are turned on
A buzzer also sounds.
 Turn the lights off.
(If equipped)
Indicates that the moon roof is not fully closed (with the
engine switch off, and the driver’s door open)
A buzzer also sounds.
 Close the moon roof.
Warning messageDetails/Actions
(Flashes)
(Flashes)