Page 7 of 860
7
1
8 7
6
5
4
3
2
GS450h_U (OM30D01U)
8-1. SpecificationsMaintenance data (fuel, oil level, etc.) .................. 782
Fuel information...........................792
Tire information........................... 795
8-2. Customization Customizable features ............ 807
8-3. Items to initialize Items to initialize .......................... 818
Reporting safety defects for U.S. owners.....................................820
Seat belt instructions for Canadian owners
(in French) ............................................... 821
SRS airbag instructions for Canadian owners
(in French) ............................................. 823 What to do if...
(Troubleshooting) ............................... 834
Alphabetical index ................................840
8Vehicle specifications
For owners
Index
For vehicles with a navigation sy stem, refer to the “Navigation System
Owner’s Manual” for information regarding the navigation system.
Page 626 of 860
626
GS450h_U (OM30D01U)
6-2. Maintenance
General maintenance
Listed below are the general maintenance items that should be per-
formed at the intervals specified in the “Warranty and Service Guide”
or “Owner’s Manual Supplement”. It is recommended that any prob-
lem you notice should be brought to the attention of your Lexus dealer
or qualified service shop for advice.
Engine compartment
ItemsCheck points
Brake fluidIs the brake fluid at the correct level? ( P. 645)
Engine/power control unit coolantIs the engine/power control unit coolant
at the correct level? ( P. 6 4 2 )
Engine oilIs the engine oil at the correct level?
( P. 6 3 9 )
Exhaust systemThere should not be any fumes or
strange sounds.
Radiator/condenserThe radiator and condenser should be
free from foreign objects. ( P. 644)
Wa s h e r f l u i dIs there sufficient washer fluid?
( P. 646)
Luggage compartment
ItemsCheck points
12-volt batteryCheck the connections. ( P. 6 4 7 )
Page 631 of 860

631
GS450h_U (OM30D01U)6-3. Do-it-yourself maintenance
6
Maintenance and care
Do-it-yourself service precautions
If you perform maintenance by yourself, be sure to follow the correct
procedure as given in these sections.
ItemsPa r t s a n d t o o l s
12-volt battery condition ( P. 6 4 7 )
•Grease
• Conventional wrench
(for terminal clamp bolts)
Brake fluid level ( P. 6 4 5 )
• FMVSS No.116 DOT 3 or SAE J1703
brake fluid
•Rag or paper towel
• Funnel (used only for adding brake fluid)
Engine/power control unit
coolant level ( P. 6 4 2 )
•“To y o t a Super Long Life Coolant” or
a similar high quality ethylene glycol-
based non-silicate, non-amine, non-
nitrite and non-borate coolant with
long-life hybrid organic acid technol-
ogy
For the U.S.A.:
“Toyota Super Long Life Coolant” is
pre-mixed with 50% coolant and
50% deionized water.
For Canada:
“Toyota Super Long Life Coolant” is
pre-mixed with 55% coolant and
45% deionized water.
• Funnel (used only for adding coolant)
Engine oil level ( P. 6 3 9 )
• “Toyota Genuine Motor Oil” or
equivalent
•Rag or paper towel
• Funnel (used only for adding engine oil)
Page 637 of 860
637
GS450h_U (OM30D01U)6-3. Do-it-yourself maintenance
6
Maintenance and care
Engine compartment
■12-volt battery
P. 6 4 7
Engine oil level dipstick
(P. 6 3 9 )
Engine coolant reservoir (P. 6 4 2 )
Engine oil filler cap (P. 640)
Power control unit coolant res-
ervoir ( P. 6 4 2 )Brake fluid reservoir
(P. 645)
Fuse box ( P. 670)
Washer fluid tank ( P. 646)
Electric cooling fans
Condenser ( P. 644)
Radiator ( P. 644)1
2
3
4
5
6
7
8
9
10
Page 639 of 860
GS450h_U (OM30D01U)
6396-3. Do-it-yourself maintenance
6
Maintenance and care
With the engine at operating temperature and turned off, check the oil
level on the dipstick.
■Checking the engine oil
Park the vehicle on level ground. After warming up the engine and
turning off the hybrid system, wait more than 5 minutes for the oil to
drain back into the bottom of the engine.
Holding a rag under the end,
pull the dipstick out.
Wipe the dipstick clean.
Reinsert the dipstick fully.
Holding a rag under the end,
pull the dipstick out and check
the oil level.
Low
Full
Wipe the dipstick and reinsert it fully.
Engine oil
1
2
3
4
5
1
2
6
Page 640 of 860

640
GS450h_U (OM30D01U)
6-3. Do-it-yourself maintenance
■Adding engine oil
If the oil level is below or near the
low level mark, add engine oil of
the same type as that already in
the engine.
Make sure to check the oil type and prepare the items needed before
adding oil.
Remove the oil filler cap by turning it counterclockwise.
Add engine oil slowly, checking the dipstick.
Install the oil filler cap by turning it clockwise.
■Engine oil consumption
A certain amount of engine oil will be cons umed while driving. In the following situa-
tions, oil consumption may increase, and engine oil may need to be refilled in
between oil maintenance intervals.
●When the engine is new, for example direct ly after purchasing the vehicle or after
replacing the engine
●If low quality oil or oil of an inappropriate viscosity is used
●When driving at high engine speeds or with a heavy load, or when driving while
accelerating or decelerating frequently
●When leaving the engine idling for a long time, or when driving frequently through
heavy traffic
Engine oil selection P. 7 8 5
Oil quantity
(Low Full) 1.6 qt. (1.5 L, 1.3 Imp.qt.)
Items
Clean funnel
1
2
3
Page 641 of 860

GS450h_U (OM30D01U)
6416-3. Do-it-yourself maintenance
6
Maintenance and care
CAUTION
■Used engine oil
●Used engine oil contains potentially harmful contaminants which may cause skin
disorders such as inflammation and skin cancer, so care should be taken to avoid
prolonged and repeated contact. To remove used engine oil from your skin, wash
thoroughly with soap and water.
●Dispose of used oil and filters only in a safe and acceptable manner. Do not dis-
pose of used oil and filters in household trash, in sewers or onto the ground.
Call your Lexus dealer, service station or auto parts store for information con-
cerning recycling or disposal.
●Do not leave used engine oil within the reach of children.
NOTICE
■To prevent serious engine damage
Check the oil level on a regular basis.
■When replacing the engine oil
●Be careful not to spill engine oil on the vehicle components.
●Avoid overfilling, or the engine could be damaged.
●Check the oil level on the dipstick every time you refill the vehicle.
●Be sure the engine oil filler cap is properly tightened.
Page 733 of 860
7337-2. Steps to take in an emergency
GS450h_U (OM30D01U)
7
When trouble arises
*: For the EV drive mode operating conditions: P. 1 9 6
Indicates that the EV
drive mode is not avail-
able
*
The reason the EV
drive mode is not avail-
able (the vehicle is
idling, battery charge is
low, speed is higher
than the EV drive
mode operating speed
range, accelerator
pedal is depressed too
much) may be dis-
played.
Use the EV drive mode
when it becomes avail-
able.
Indicates that the EV
drive mode has been
automatically canceled
*
The reason the EV
drive mode is not avail-
able (the battery
charge is low, speed is
higher than the EV
drive mode operating
speed range, accelera-
tor pedal is depressed
too much) may be dis-
played.
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