2015 Lexus GS300h Brake

4737-2. Steps to take in an emergency
7
When trouble arises
GS450h_300h_OM_OM30F00E_(EE)
Tighten down the towing eyelet
securely using a wheel nut wrench
or hard metal bar.
Securely attach cables or chains to the towing eyelet.
Take care not to damage the vehicle body.
Enter the vehicle being towed and start the hybrid system.
If the hybrid system does not start, turn the power switch to ON mode.
Shift the shift lever to N and release the parking brake.
When the shift lever cannot be shifted: →P. 5 4 5
■While towing
If the hybrid system is off, the power assist for the brakes and steering will not function,
making steering and braking more difficult.
■Wheel nut wrench
Wheel nut wrench is installed in trunk. ( →P. 5 1 8 , 5 2 9 )
4
5
6
7

475
7
7-2. Steps to take in an emergency
When trouble arises
GS450h_300h_OM_OM30F00E_(EE)
If you think something is wrong
●Fluid leaks under the vehicle.
(Water dripping from the air conditioning after use is normal.)
●Flat-looking tires or uneven tire wear
●Engine coolant temperature gauge needle continually points higher than nor-
mal.
●Changes in exhaust sound
●Excessive tire squeal when cornering
●Strange noises related to the suspension system
●Pinging or other noises related to the hybrid system
●Engine missing, stumbling or running roughly
●Appreciable loss of power
●Vehicle pulls heavily to one side when braking
●Vehicle pulls heavily to one side when driving on a level road
●Loss of brake effectiveness, spongy feeling, pedal almost touches the floor
If you notice any of the following symptoms, your vehicle probably needs
adjustment or repair. Contact any authorized Lexus dealer or repairer, or
another duly qualified an
d equipped professional as soon as possible.
Visible s ymp toms
Audible symptoms
Operational symptoms

4767-2. Steps to take in an emergency
GS450h_300h_OM_OM30F00E_(EE)
If a warning light turns on or a warning buzzer
sounds
Calmly perform the following actions if any of the warning lights comes on or
flashes. If a light comes on or flashes, but then goes off, this does not necessar-
ily indicate a malfunction in the system. However, if this continues to occur,
have the vehicle inspected by any authorized Lexus dealer or repairer, or
another duly qualified an d equipped professional.
Warning light and warning buzzer list
Warning lightWarning light/Details/Actions
Brake system warning light (warning buzzer)
•Low brake fluid
• Malfunction in the electron ically controlled brake system
→ Immediately stop the vehicle in a safe place and contact any
authorized Lexus dealer or repairer, or another duly qualified
and equipped professional. Continuing to drive the vehicle may
be dangerous.
(If equipped)
Charging system warning light
Indicates a malfunction in the vehicle’s charging system
→ Immediately stop the vehicle in a safe place and contact any
authorized Lexus dealer or repairer, or another duly qualified
and equipped professional.
Malfunction indicator lamp
Indicates a malfunction in:
• The hybrid system;
• The emission control system (if equipped);
• The electronic engine control system;
• The electronic throttle control system; or
• The electronic hybrid transmission control system (if equipped)
→ Have the vehicle inspected by any authorized Lexus dealer or
repairer, or another duly qualified and equipped professional
immediately.
SRS warning light
Indicates a malfunction in:
• The SRS airbag system; or
• The seat belt pretensioner system
→ Have the vehicle inspected by any authorized Lexus dealer or
repairer, or another duly qualified and equipped professional
immediately.

4777-2. Steps to take in an emergency
7
When trouble arises
GS450h_300h_OM_OM30F00E_(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. 263, 284, 292)
• 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. 2 8 0 , 3 4 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

4787-2. Steps to take in an emergency
GS450h_300h_OM_OM30F00E_(EE)
(Flashes)
(If equipped)
“AFS OFF” indicator Indicates a malfunction in the adaptive front-lighting system
→ Have the vehicle inspected by any authorized Lexus dealer or
repairer, or another duly qualified and equipped professional
immediately.
(Flashes)
Brake hold operated indicator
Indicates a malfunction in the brake hold system
→ Have the vehicle inspected by any authorized Lexus dealer or
repairer, or another duly qualified and equipped professional
immediately.
(Flashes)
Parking brake indicator
Indicates a malfunction in the parking brake system
→ Have the vehicle inspected by any authorized Lexus dealer or
repairer, or another duly qualified and equipped professional
immediately.
Brake system warning light
Indicates a malfunction in:
• The electronically controlled brake system;
• The regenerative braking system; or
• The parking brake system
→ Have the vehicle inspected by any authorized Lexus dealer or
repairer, or another duly qualified and equipped professional
immediately.
Low fuel level warning light
Indicates remaining fuel is approximately 9.9 L (2.6 gal.,
2.2 Imp.gal.) or less
→ Refuel the vehicle.
Seat belt reminder light (warning buzzer)*
Warns the driver and/or front passenger to fasten their seat belts
→ Fasten the seat belt.
If the front passenger’s seat is occupied, the front passenger’s
seat belt also needs to be fastened to make the warning light
(warning buzzer) off.
Master warning light
A buzzer sounds and the warning light comes on and flashes to
indicate that the master warning system has detected a malfunc-
tion.
→ P. 4 8 2
Warning lightWarning light/Details/Actions

4807-2. Steps to take in an emergency
GS450h_300h_OM_OM30F00E_(EE)
■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
The compact spare tire is not equipped with a tire pressure warning valve and transmit-
ter. 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. 4 3 6
■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
power switch is turned to ON mode, have it checked by any authorized Lexus dealer or
repairer, or another duly qualified and equipped professional.
■Warning buzzer
In some cases, the buzzer may not be heard because of noisy place or an audio sound.
WA R N I N G
■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 dealer
or repairer, or another duly qualified and equipped professional. 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
dealer or repairer, or another duly qualified and equipped professional.
●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.

4827-2. Steps to take in an emergency
GS450h_300h_OM_OM30F00E_(EE)
If a warning message is displayed
Master warning light
The master warning light also comes on or flashes in order to indicate that a message
is currently being displayed on the multi-information display.
Multi-information display
If any of the warning light comes on again after the following actions have been
performed, contact any authorized Lexu s dealer or repairer, or another duly
qualified and equipped professional.
If a warning is shown on the multi-information display, stay calm and perform
the following actions:
XExcept F SPORT modelsXF SPORT models
Warning message and warning buzzer list
1
2
Wa r n i n g m e s s a g eDetails/Actions
(If equipped)
Indicates that there is a high possibility of a frontal colli-
sion, or that the pre-crash br aking 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.

4837-2. Steps to take in an emergency
7
When trouble arises
GS450h_300h_OM_OM30F00E_(EE)
(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.
Indicates a malfunctio n in the brake system
A buzzer also sounds.
→ Have the vehicle inspected by any authorized Lexus
dealer or repairer, or another duly qualified and
equipped professional.
Continuing to drive the vehicle may be dangerous.
Wa r n i n g m e s s a g eDetails/Actions
(Flashes)