2013 Lexus GS300h check engine

8537-2. Steps to take in an emergency
7
When trouble arises
GS450h_300h_OM_OM30D53E_(EE)
*: For the EV drive mode operating conditions: P. 254
Indicates that the EV
drive mode is not avail-
able
*
The reason the EV
drive mode is not
available (the vehi-
cle is idling, battery
charge is low, speed
is higher than the EV
drive mode operat-
ing speed range,
accelerator pedal is
depressed too much)
may be displayed.
Use the EV drive mode
when it becomes avail-
able.
Indicates that the EV
drive mode has been
automatically can-
celed
*
The reason the EV
drive mode is not
available (the battery
charge is low, speed
is higher than the EV
drive mode operat-
ing speed range,
accelerator pedal is
depressed too much)
may be displayed.
Drive the vehicle for a
while.
Indicates that engine
oil level is lowCheck the level of
engine oil, and add if
necessary.
Wa r n i n g m e s s a g eDetailsCorrection procedure

8567-2. Steps to take in an emergency
GS450h_300h_OM_OM30D53E_(EE)
(If equipped)
Indicates that the LKA
(Lane-Keeping Assist)
system detects no-
handed driving (while
the lane keeping assist
function is operating)
The warning buzzer
sounds twice.
Grip the steering wheel
firmly.
(If equipped)
Indicates that the Blind
Spot Monitor sensors
or the surrounding area
on the bumper is dirty
or covered with ice
Clean the sensor and its
surrounding area on the
bumper.
Indicates that the
hybrid system has
overheated
This message may be
displayed when driv-
ing under severe
operating condi-
tions. (For example,
when driving up a
long steep hill.)
Stop and check.
(P. 917)
Indicates that the
hybrid system output is
limited because the
engine oil is over-
heatedDrive the vehicle at a
safe speed until the
warning message dis-
appears.
Wa r n i n g m e s s a g eDetailsCorrection procedure

9197-2. Steps to take in an emergency
7
When trouble arises
GS450h_300h_OM_OM30D53E_(EE)
Add coolant if necessary. (P. 923)
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 immedi-
ately 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, turn 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.
5
GS300hGS450h
6
7

9247-2. Steps to take in an emergency
GS450h_300h_OM_OM30D53E_(EE)
CAUTION
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 hood, 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 automati-
cally 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 muf-
fler) getting caught, resulting in serious injury.
Do not loosen the coolant inlet cap or
the coolant reservoir caps while the
hybrid system and radiator are hot.
High temperature steam or coolant
could spray out.

9308-1. Specifications
GS450h_300h_OM_OM30D53E_(EE)
*: The engine oil capacity is a reference quantity to be used when changing
the engine oil. Warm up the engine and turn off the hybrid system, wait
more than 5 minutes, and check the oil level on the dipstick.
Hybrid battery (traction battery)
Ty p eNickel-Metal hydride battery
Vo l t a g e7.2 V/module
Capacity6.5 Ah (3HR)
QuantityGS300h32 modules
GS450h40 modules
Overall voltageGS300h230.4 V
GS450h288 V
Lubrication system
Oil capacity
(Drain and refill 
reference
*)
With filter
Without filter
GS300hGS450h
4.5 L (4.8 qt., 4.0 lmp.
qt.)
4.1 L (4.3 qt., 3.6 lmp.
qt.)6.2 L (6.6 qt., 5.5
Imp.qt.)
5.9 L (6.2 qt., 5.2
Imp.qt.)

965Alphabetical index
GS450h_300h_OM_OM30D53E_(EE)
Child safety .................................58
12-volt battery
precautions .................752, 916
Airbag precautions..................47
Child restraint system .............59
How your child should
wear the seat belt ............39, 41
Installing child restraints ........71
Moon roof precautions .........221
Power window lock switch...215
Power window precautions...217
Rear door child-protectors ....184
Removed electronic key
battery precautions .............781
Seat belt comfort guide...........39
Seat belt precautions ...............43
Seat heater precautions .........703
Trunk precautions ................190
Child-protectors ........................184
Cleaning ............................720, 724
Aluminum wheels.................721
Exterior .................................720
Interior ..................................724
Seat belts...............................725Clock ........................................ 698
Coat hooks ................................ 715
Condenser ................................ 747
Console box .............................. 690
Console box light...................... 690
Coolant ..................................... 744
Capacity ............................... 933
Checking .............................. 744
Preparing and checking
before winter ..................... 434
Cooling system ......................... 744
Engine overheating .............. 917
Hybrid system overheating .. 917
Cruise control
Cruise control ...................... 298
Dynamic radar cruise control ....
302
Dynamic radar cruise control
with full-speed range ......... 319
Cup holders............................... 691
Curtain shield airbags ................ 45
Customizable features .............. 943

968Alphabetical index
GS450h_300h_OM_OM30D53E_(EE)
Emergency brake signal ............399
Emergency flashers ...................820
Emergency tire puncture
repair kit ..................................885
Energy monitor..........................131
Engine .......................................928
Accessory mode....................247
Compartment ........................738
Engine switch .......................246
Hood .....................................734
How to start the hybrid
system.................................246
Identification number ...........928
Ignition switch
(power switch)....................246
Overheating ..........................917
Power switch ........................246
Engine compartment cover........740
Engine coolant ...........................744
Capacity ................................933
Checking ...............................744
Preparing and checking
before winter ......................434
Engine coolant temperature
gauge .......................................109
Engine oil ..................................741
Capacity ................................930
Checking ...............................741
Oil level warning message....853
Oil pressure warning
message ..............................841
Preparing and checking
before winter ......................434Engine switch ........................... 246
EPS (Electric Power Steering) . 398
Function ............................... 398
Warning light ....................... 833
Warning message................. 845
EV drive mode.......................... 254
First-aid kit storage net ............. 694
Flat tire
Vehicles with a spare tire..... 871
Vehicles without a spare tire 885
Floor mats ................................... 34
Fluid
Brake.................................... 935
Hybrid transmission............. 934
Washer ................................. 748
Fog lights .................................. 283
Replacing light bulbs ... 805, 818
Switch .................................. 283
Wattage ................................ 940
Follow me home system ........... 273
Footwell light ........................... 684
Front air conditioning system ... 478
Front fog lights ......................... 283
Replacing light bulbs ... 805, 818
Switch .................................. 283
Wattage ................................ 940
Front personal lights ................. 685
Front position lights.................. 272
Light switch ......................... 272
Replacing light bulbs ........... 818
Welcome light illumination
control ............................... 143
F