2018 Lexus GS450h stop start

4557-2. Steps to take in an emergency
GS450h_OM_OM30G62U_(U)
7
When trouble arises
Ensure that the shift lever is in P and depress the brake pedal.
Touch the Lexus emblem side of the
electronic key to the power switch.
When the electronic key is detected, a
buzzer sounds and the power switch will
turn to ON mode.
When the smart access system with
push-button start is deactivated in cus-
tomization setting, the power switch will
turn to ACCESSORY mode.
Firmly depress the brake pedal and check that is shown on the multi-
information display.
Press the power switch.
In the event that the hybrid system st ill cannot be started, contact your Lexus
dealer.
■Stopping the hybrid system
Shift the shift lever to P and press the power sw itch as you normally do when stopping the
hybrid system.
■Replacing the key battery
As the above procedure is a temporary measure, it is recommended that the electronic
key battery be replaced immediately when the battery is depleted. ( →P. 382)
■Alarm
If the trunk is opened using the mechanical key when the alarm system is set, the alarm
may be triggered. ( →P. 77)
■Changing power switch modes
Release the brake pedal and press the power switch in step above.
The hybrid system does not start and modes will be changed each time the switch is
pressed.( →P. 183)
■When the electronic key does not work properly
●Make sure that the smart access system wi th push-button start has not been deacti-
vated in the customization setting. If it is off, turn the function on.
(Customizable features: → P. 494)
●Check if battery-saving mode is set. If it is set, cancel the function. (→P. 136)
Starting the hybrid system
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4627-2. Steps to take in an emergency
GS450h_OM_OM30G62U_(U)
The coolant level is satisfactory if it is between the “FULL” and “LOW” lines
on the reservoir.
Reservoir
“FULL”
“LOW”
Coolant inlet cap
Add coolant if necessary.
(→ P. 464)
Water can be used in an emergency
if engine coolant is unavailable.
Start the hybrid system and turn the air conditioning system on to check
that the radiator cooling fans operate and to check for coolant leaks from
the radiator or hoses.
The fans operate when the air conditioning system is turned on immediately after a
cold start. Confirm that the fans are operating by checking the fan sound and air
flow. If it is difficult to check these, tu rn the air conditioning system on and off
repeatedly. (The fans may not operate in freezing temperatures.)
If the fans are not operating:
Stop the hybrid system immediately and contact your Lexus dealer.
If the fans are operating:
Have the vehicle inspected at the nearest Lexus dealer.
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4637-2. Steps to take in an emergency
GS450h_OM_OM30G62U_(U)
7
When trouble arises
■If “Hybrid System Overheated Reduced Output Power” is shown on the
multi-information displayStop the vehicle in a safe place.
Stop the hybrid system an d carefully lift the hood.
After the hybrid system has cooled down, inspect the hoses and radiator
core (radiator) for any leaks.
Radiator
Cooling fans
If a large amount of coolant leaks,
immediately contact your Lexus
dealer.
The coolant level is satisfactory if it is between the “FULL” and “LOW” lines
on the reservoir.
Reservoir
“FULL”
“LOW”
Add coolant if necessary.
Water can be used in an emergency
if power control unit coolant is
unavailable.
Start the hybrid system and check for the multi-information display.
If the message does not disappear:
Stop the hybrid system and contact your Lexus dealer.
If the message is not displayed:
Have the vehicle inspected at the nearest Lexus dealer.
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4657-2. Steps to take in an emergency
GS450h_OM_OM30G62U_(U)
7
When trouble arises
WARNING
■When inspecting under the hood of your vehicle
Observe the following precautions.
Failure to do so may result in serious injury such as burns.
●If steam is seen coming from under the h ood, do not open the hood until the steam
has subsided. The engine compartment may be very hot.
●After the hybrid system has been turned off, check that the indicator on the power
switch and the “READY” indicator are off.
When the hybrid system is operating, the gasoline engine may automatically start, or
the cooling fan may suddenly operate even if the gasoline engine stops. Do not touch
or approach rotating parts such as the fan, which may lead to fingers or clothing
(especially a tie, a scarf or a muffler) ge tting caught, resulting in serious injury.
NOTICE
■When adding engine/power control unit coolant
Add coolant slowly after the hybrid system has cooled down sufficiently. Adding cool
coolant to a hot hybrid system too quickly can cause damage to the hybrid system.
■To prevent damage to the cooling system
Observe the following precautions:
●Avoid contaminating the coolant with foreig n matter (such as sand or dust etc.).
●Do not use any coolant additive.
●Do not loosen the coolant inlet cap or the
coolant reservoir cap while the hybrid system
and radiator are hot.
High temperature steam or coolant could
spray out.

466
GS450h_OM_OM30G62U_(U)
7-2. Steps to take in an emergency
If the vehicle becomes stuck
Stop the hybrid system. Set the parking brake and shift the shift lever to P.
Remove the mud, snow or sand from around the rear wheels.
Place wood, stones or some other materi al under the rear wheels to help pro-
vide traction.
Restart the hybrid system.
Shift the shift lever to D or R and rele ase the parking brake. Then, while exer-
cising caution, depress the accelerator pedal.
■When it is difficult to free the vehicle
Carry out the following procedures if the tires spin or the vehicle becomes
stuck in mud, dirt or snow:
Press to turn off TRAC. ( →P. 270)
WARNING
■When attempting to free a stuck vehicle
If you choose to push the vehicle back and forth to free it, make sure the surrounding
area is clear to avoid striking other vehicl es, objects or people. The vehicle may also
lunge forward or lunge back suddenly as it becomes free. Use extreme caution.
■When shifting the shift lever
Be careful not to shift the shift lever with the accelerator pedal depressed.
This may lead to unexpected rapid acceleration of the vehicle that may cause an acci-
dent resulting in deat h or serious injury.
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GS450h_OM_OM30G62U_(U)
5058-2. Customization
8
Vehicle specifications
■Rear sunshade (→P. 318)
■Seat belt reminder buzzer ( →P. 406)
■Vehicle customization
●When the speed linked door locking function and shift position linked door locking
function are both on, the door lock operates as follows.
• When shifting the shift lever to any position other than P, all the doors will be locked.
• If the vehicle is started with all the doors locked, the speed linked door locking func-
tion would not operate.
• If the vehicle is started with any door un locked, the speed linked door locking func-
tion will operate.
●When the smart access system with push-button start is off, the selecting door to
unlock cannot be customized.
●When the doors remain closed after unloc king the doors and the automatic door lock
function (time elapsed before the automatic d oor lock function is activated if a door is
not opened after being unlock ed) activates, the signals will be generated in accordance
with the operation signal (buzzers) and the operation signal (emergency flashers) set-
tings.
●Some settings can be changed using a switch or the Remote Touch screen. If a setting is
changed using a switch, the changed setting will not be reflected on the Remote Touch
screen until the power switch is turned off and then to ON mode.
■When customizing usin g the Remote Touch
Stop the vehicle in a safe place, apply the parking brake, and shift the shift lever to P. Also,
to prevent 12-volt battery discharge, leave the hybrid system operating while customiz-
ing the features.
FunctionDefault settingCustomized setting
Reverse operationOnOff——O
Time elapsed before the reverse opera-
tion feature activates0.7
seconds
0 second
——O
0.9
seconds
1.2
seconds
123
FunctionDefault
settingCustomized setting
Speed-linked seat belt reminder func-
tionOnOff——O
123

525What to do if... (Troubleshooting)
GS450h_OM_OM30G62U_(U)
●Did you press the power switch while firmly depressing the brake pedal? \
(→P. 182)
●Is the shift lever in P? ( →P. 184)
●Is the electronic key anywhere detectable inside the vehicle? ( →P. 135)
●Is the steering wheel unlocked? (→ P. 185)
●Is the electronic key battery weak or depleted?
In this case, the hybrid system can be started in a temporary way. ( →P. 455)
●Is the 12-volt battery discharged? ( →P. 457)
●Is the power switch in ON mode?
If you cannot release the shift lever by depressing the brake pedal with the
power switch in ON mode ( →P. 193)
●It is locked automatically to prevent theft of the vehicle. ( →P. 184)
●Is the window lock switch pressed?
The power window except for the one at the driver’s seat cannot be operated
if the window lock switch is pressed. ( →P. 160)
●The auto power off function will be operated if the vehicle is left in ACCES-
SORY or ON mode (the hybrid system is not operating) for a period of time.
(→ P. 184)
If you think something is wrong
The hybrid system does not start
The shift lever cannot be shifted from P even if you depress the brake
pedal
The steering wheel cannot be turned after the hybrid system is stopped
The windows do not open or close by operating the power window
switches
The power switch is turned off automatically

526What to do if... (Troubleshooting)
GS450h_OM_OM30G62U_(U)
●The seat belt reminder light is flashing
Are the driver and the front passenger wearing the seat belts? (→P. 406)
●The parking brake indicator is on
Is the parking brake released? ( →P. 196)
Depending on the situation, other types of warning buzzer may also sound.
(→ P. 404, 410)
●Did anyone inside the vehicle open a door during setting the alarm?
The sensor detects it and the alarm sounds. (→ P. 77)
To stop the alarm, turn the power switch to ON mode or start the hybrid system.
●Is the electronic key left inside the vehicle or the moon roof opened?
Check the message on the multi-information display. (→ P. 410)
●When a warning light turns on or a warning message is displayed, refer to
P. 404, 410.A warning buzzer sounds during driving
An alarm is activated and the horn sounds
A warning buzzer sounds when leaving the vehicle
A warning light turns on or a warning message is displayed