light Lexus GS450h 2010 Using The Audio System / LEXUS 2010 GS450H OWNERS MANUAL (OM30C81U)

5
When trouble arises
543
5-2. Steps to take in an emergency
GS_HV_U (OM30C81U)
October 13, 2015 12:41 pm
If a warning message is displayed
If a warning is shown on the multi-information display, stay calm and per-
form the following actions:
Multi-information display
Master warning light
The master warning light also
comes on or flashes in order to
indicate that a message is cur-
rently being displayed on the
multi-information display.
If any of the warning light turns on again after performing the following
actions, contact your Lexus dealer.

544
5-2. Steps to take in an emergency
GS_HV_U (OM30C81U)
October 13, 2015 12:41 pm
Stop the vehicle immediately.
A buzzer sounds and a warning message is shown on the multi-informa-
tion display. The following warnings indicate the possibility of damage to
the vehicle that may lead to an accident. Immediately stop the vehicle in a
safe place and contact your Lexus dealer.
Wa r n i n g m e s s a g eDetails
(U.S.A.)
(Canada)
(Flashing)
Abnormal engine oil pressure.
The warning light may turn on if the engine oil pres-
sure is too low.
Malfunction in the hybrid system.

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When trouble arises
545
5-2. Steps to take in an emergency
GS_HV_U (OM30C81U)
October 13, 2015 12:41 pm
Have the vehicle inspected immediately.
A buzzer sounds and a warning message is shown on the multi-informa-
tion display. Failure to investigate the cause of the following warnings may
lead to the system operating abnormally and possibly cause an accident.
Have the vehicle inspected by your Lexus dealer immediately.
Wa r n i n g m e s s a g eDetails
Malfunction in the automatic headlight leveling sys-
tem.
Malfunction in the rear lights system.
(Flashing)
Malfunction in the steering lock system.
(If equipped)
Intuitive parking assist malfunction.
The malfunctioning sensor is shown flashing on the
display.

556
5-2. Steps to take in an emergency
GS_HV_U (OM30C81U)
October 13, 2015 12:41 pm
Have the malfunction repaired immediately.
After taking the specified steps to correct the suspected problem, check
that the warning message and light turn off.
Interior
buzzerExterior
buzzerWa r n i n g m e s s a g eDetailsCorrection
procedure
Once(Comes on for 10 seconds)
(Flashing)
The electronic key
is not detected
when attempting
to start the hybrid
system.Confirm the
location of
the elec-
tronic key.
Once3 times
(Flashing)
An open door
other than the
driver’s door is
closed while the
electronic key is
outside the detec-
tion range and the
“POWER” switch
is in ACCES-
SORY or ON
mode.
Confirm the
location of
the elec-
tronic key.

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When trouble arises
561
5-2. Steps to take in an emergency
GS_HV_U (OM30C81U)
October 13, 2015 12:41 pm
■The compact spare tire
●The compact spare tire is identified by the label “TEMPORARY USE ONLY”
on the tire sidewall.
Use the compact spare tire temporarily only in an emergency.
●Make sure to check the tire inflation pressure of the compact spare tire. 
(P. 5 9 6 )
■Tr e a d l i f e
The compact spare tire can be used many times, if necessary. It has tread life of up
to 3000 miles (4800 km) depending on road conditions and your driving habits.
When treadwear indicators appear on the tire, replace the tire. (P. 475)
■When using the compact spare tire
As the compact spare tire is not equipped with the tire pressure warning valve and
transmitter, low inflation pressure of the spare tire will not be warned. Also, if you
replace the compact spare tire after the tire pressure warning light comes on, the
light remains on.
■Compact spare tire
The compact tire saves space in your luggage compartment, and its
lighter weight helps to enhance fuel economy and permits easier
installation in case of a flat tire.
The compact spare tire is
designed for temporary emer-
gency use only.

5
When trouble arises
563
5-2. Steps to take in an emergency
GS_HV_U (OM30C81U)
October 13, 2015 12:41 pm
Replacing a flat tire
Chock the tires.
Slightly loosen the wheel nuts (one
turn).
STEP1
Flat tireWheel chock positions
FrontLeft-hand sideBehind the rear right-hand side tire
Right-hand sideBehind the rear left-hand side tire
Rear
Left-hand sideIn front of the front right-hand side tire
Right-hand sideIn front of the front left-hand side tire
STEP2

564
5-2. Steps to take in an emergency
GS_HV_U (OM30C81U)
October 13, 2015 12:41 pm
Turn the tire jack portion “A” by
hand until the notch of the jack is in
contact with the jack point.
Raise the vehicle until the tire is
slightly raised off the ground.
Remove all the wheel nuts and the
tire.
When resting the tire on the
ground, place the tire so that the
wheel design faces up to avoid
scratching the wheel surface.
STEP3
STEP4
STEP5

570
5-2. Steps to take in an emergency
GS_HV_U (OM30C81U)
October 13, 2015 12:41 pm
If you have a flat tire (Vehicles with run-flat tires)
■In some condition (such as at high temperatures)
You can not continue driving for up to 100 miles (160 km).
■Spare tire
A spare tire is not provided on the vehicle with run-flat tires.
■If you cannot distinguish between standard tires and run-flat tires
Consult your Lexus dealer.
■For detailed information on run-flat tires
See the tire warranty book.
Take your vehicle to the nearest Lexus dealer or authorized tire dealer as
soon as possible.
■Run-flat tires (A “RFT” or “DSST” mark is molded on the sidewall)
You can continue driving the
vehicle with run-flat tires even if
any tire goes flat.
The vehicle is able to run for a
maximum of 100 miles (160 km)
at a speed below 55 mph (90
km/h) after the tire pressure
warning light comes on. 
(P. 5 3 7 )

572
5-2. Steps to take in an emergency
GS_HV_U (OM30C81U)
October 13, 2015 12:41 pm
If the hybrid system will not start
If the hybrid system will not start even though correct starting procedures
are being followed (
P. 150), consider each of the following points.
■The hybrid system will not start even if you are carrying the cor-
rect electronic key
One of the following may be the cause of the problem.
●The electronic key battery may be discharged. (P. 575)
●There may not be sufficient fuel in the vehicle’s tank.
Add fuel to the vehicle.
●There may be a malfunction in the steering lock system.
●There may be a malfunction in the immobilizer system. (P. 99)
■The interior lights and headlights are dim, or the horn does not
sound or sounds at a low volume
One of the following may be the cause of the problem.
●The 12 volt battery may be discharged. (P. 5 7 8 )
●The 12 volt battery terminal connections may be loose or cor-
roded.
■The interior lights and headlights do not turn on, or the horn does
not sound
One of the following may be the cause of the problem.
●One or both of the 12 volt battery terminals may be discon-
nected.
●The 12 volt battery may be discharged. (P. 5 7 8 )
Contact your Lexus dealer if the problem cannot be repaired, or if
repair procedures are unknown.

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When trouble arises
579
5-2. Steps to take in an emergency
GS_HV_U (OM30C81U)
October 13, 2015 12:41 pm
■Starting the hybrid system when the 12 volt battery is discharged
The hybrid system cannot be started by push-starting.
■To prevent 12 volt battery discharge
●Turn off the headlights and the audio system while the hybrid system is off.
●Turn off any unnecessary electrical components when the vehicle is running at a
low speed for an extended period, such as in heavy traffic, etc.
■When the 12 volt battery is removed or discharged
The hybrid system may not start. (
P. 4 7 1 )
Also, the intuitive parking assist must be initialized. (
P. 555)
Start the engine of the second vehicle. Increase the engine
speed slightly and maintain at that level for approximately 5
minutes to recharge the 12 volt battery of your vehicle.
Open and close any of the doors with the “POWER” switch is
OFF.
Maintain the engine speed on the second vehicle and turn the
“POWER” switch to the ON mode, then start the vehicle’s
hybrid system.
Make sure the “READY” light comes on. If the light does not
come on, contact your Lexus dealer.
Once the vehicle’s hybrid system has started, remove the
jumper cables in the exact reverse order in which they were
connected.
Once the hybrid system starts, have the vehicle checked at your Lexus
dealer as soon as possible.STEP4
STEP5
STEP6
STEP7
STEP8