2018 Lexus LC500h battery

2876-3. Do-it-yourself maintenance
LC500_LC500h_OM_OM11405U_(U)
6
Maintenance and care
6-3.Do-it-yourself maintenance
Do-it-yourself service pre-
cautions
If you perform maintenance by
yourself, be sure to follow the cor-
rect procedure as given in these
sections.
Maintenance
ItemsParts and tools
12-volt battery
condition
(  P.298)•Grease
• Conventional wrench
(for terminal clamp
bolts)
Brake fluid
level
( P.297)
• SAE J1703 or FMVSS
No.116 DOT 3 brake
fluid
• Rag or paper towel
• Funnel (used only for adding brake fluid)
Engine coolant
level (LC500)
( P.295)
•“Toyota Super Long Life
Coolant” or a similar
high quality ethylene
glycol-based non-sili-
cate, non-amine, non-
nitrite and non-borate
coolant with long-life
hybrid organic acid
technology
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/power
control unit
coolant level
(LC500h)
( P.295)
•“Toyota Super Long Life
Coolant” or a similar
high quality ethylene
glycol-based non-sili-
cate, non-amine, non-
nitrite and non-borate
coolant with long-life
hybrid organic acid
technology
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)
ItemsParts and tools

2926-3. Do-it-yourself maintenance
LC500_LC500h_OM_OM11405U_(U)
LC500hEngine oil level dipstick ( P.293)
Power control unit coolant reservoir ( P.296)
Engine oil filler cap ( P.293)
Brake fluid reservoir ( P.297)
Fuse boxes ( P.319)
Washer fluid tank ( P.297)
Engine coolant reservoir ( P.295)
Electric cooling fan
Condenser ( P.296)
Radiator ( P.296)
■12-volt battery
 P.298
A
B
C
D
E
F
G
H
I
J

2986-3. Do-it-yourself maintenance
LC500_LC500h_OM_OM11405U_(U)
LC500
LC500hThe 12-volt battery is located in the
trunk.
■Before recharging
When recharging, the 12-volt battery pro-
duces hydrogen gas which is flammable
and explosive. Therefore, observe the fol-
lowing precautions before recharging:
●If recharging with the 12-volt battery
installed on the vehicle, be sure to discon-
nect the ground cable.
●Make sure the power switch on the char-
ger is off when connecting and discon-
necting the charger cables to the 12-volt
battery.
■After recharging/reconnecting the 12-
volt battery
●Unlocking the doors using the smart
access system with pu sh-button start may
not be possible immediately after recon-
necting the 12-volt battery. If this hap-
pens, use the wireless remote control or
the mechanical key to lock/unlock the
doors.
●Start the engine with the
engine switch in ACCES-
SORY mode. The engine tem> may not start with the engine switch
turned off. However, the
engine will operate nor-
mally from the second attempt.
●The engine switch mode
is recorded by the vehicle. If the 12-volt
WARNING
■When adding washer fluid
Do not add washer fluid when the engine
is hot or running ating> as washer fluid contains alcohol
and may catch fire if spilled on the engine
etc.
NOTICE
■Do not use any fluid other than
washer fluid
Do not use soapy water or engine anti-
freeze instead of washer fluid.
Doing so may cause streaking on the
vehicle’s painted surfaces, as well as
damaging the pump leading to problems
of the washer fluid not spraying.
■Diluting washer fluid
Dilute washer fluid with water as neces-
sary.
Refer to the freezing temperatures listed
on the label of the washer fluid bottle.
12-volt battery
Location

2996-3. Do-it-yourself maintenance
LC500_LC500h_OM_OM11405U_(U)
6
Maintenance and care
battery is reconnect ed, the vehicle will
return the engine switch
mode to the status it was in before the 12-
volt battery was disc onnected. Make sure
to turn off the engine switch switch> before disconnect the 12-volt bat-
tery. Take extra care when connecting the
12-volt battery if the engine switch
mode prior to discharge
is unknown.
●Restart the engine ,
depress the brake pedal, and confirm that
it is possible to shift into each shift posi-
tion.
If the engine will not start
even after multiple at tempts at all methods
above, contact your Lexus dealer.
Pull the strap upwards to lift up the lug-
gage mat.
WARNING
■Chemicals in the 12-volt battery
The 12-volt battery contains poisonous
and corrosive sulfuric acid and may pro-
duce hydrogen gas which is flammable
and explosive. To reduce the risk of death
or serious injury, take the following pre-
cautions while working on or near the 12-
volt battery:
●Do not cause sparks by touching the
12-volt battery terminals with tools.
●Do not smoke or light a match near the
12-volt battery.
●Avoid contact with eyes, skin and
clothes.
●Never inhale or swallow electrolyte.
●Wear protective safety glasses when
working near the 12-volt battery.
●Keep children away from the 12-volt
battery.
■Where to safely charge the 12-volt
battery
Always charge the 12-volt battery in an
open area. Do not charge the 12-volt bat-
tery in a garage or closed room where
there is insufficient ventilation.
■How to recharge the 12-volt battery
Recharge at a current of 5 A or less and
make sure that the recharging period
does not exceed a total of 12 hours.
■Emergency measures regarding
electrolyte
●If electrolyte gets in your eyes
Flush your eyes with clean water for at
least 15 minutes and get immediate
medical attention. If possible, continue
to apply water with a sponge or cloth
while traveling to the nearest medical
facility.
●If electrolyte gets on your skin
Wash the affected area thoroughly. If
you feel pain or burning, get medical
attention immediately.
●If electrolyte gets on your clothes
It can soak through clothing on to your
skin. Immediately take off the clothing
and follow the procedure above if nec-
essary.
●If you accidentally swallow electrolyte
Drink a large quantity of water or milk.
Get emergency medical attention
immediately.
NOTICE
■When recharging the 12-volt battery
Never recharge the 12-volt battery while
the engine is running operating>. Also, be sure all accessories
are turned off.
Removing the 12-volt battery
cover

3006-3. Do-it-yourself maintenance
LC500_LC500h_OM_OM11405U_(U)
Make sure that the 12-volt battery ter-
minals are not corroded and that there
are no loose connections, cracks, or
loose clamps.Terminals
Hold-down clamp
Check that the level is upper than the
center between the bottom of the bat-
tery lid and “LOWER LEVEL” line. Bottom of the battery lid
“LOWER LEVEL” line
Center of and
If the fluid level is below , replace the
12-volt battery.
Exterior
Checking 12-volt battery fluid
A
B
A
B
CAB
C

3186-3. Do-it-yourself maintenance
LC500_LC500h_OM_OM11405U_(U)
■If the electronic key battery is depleted
The following symptoms may occur:
●The smart access syst em with push-but-
ton start and wireless remote control will
not function properly.
●The operational rang e will be reduced.
Prepare the following before replacing
the battery:
Flathead screwdriver
 Small flathead screwdriver
 Lithium battery CR2032
■Use a CR2032 lithium battery
●Batteries can be purchased at your Lexus
dealer, local electrical appliance shops or
camera stores.
●Replace only with the same or equivalent
type recommended by the manufacturer.
●Dispose of used batteries according to
the local laws.
1 Take out the mechanical key. 2
Remove the cover.
To prevent damage to the key, wrap the tip
of the screwdri ver with tape.
3Remove the depleted battery.
Insert a new battery with the “+” terminal
facing up.
Electronic key battery
Replace the battery with a new one
if it is depleted.
Items to prepare
Replacing the battery
WARNING
■Removed battery and other parts
These parts are small and if swallowed by
a child, they can cau se choking. Keep
away from children. Failure to do so
could result in death or serious injury.
NOTICE
■When replacing the battery
Use a screwdriver of appropriate size.
Applying excessive force may deform or
damage the cover.
■For normal operation after replacing
the battery
Observe the following precautions to
prevent accidents:

3196-3. Do-it-yourself maintenance
LC500_LC500h_OM_OM11405U_(U)
6
Maintenance and care
1 Turn the engine switch switch> off.
2 Open the Fuse box cover.
Engine compartment: type A fuse
box (LC500)
Push the tab in and lift the lid off.
Engine compartment: type B fuse
box (LC500h)
Push the tab in and lift the lid off.
NOTICE
●Always work with dry hands.
Moisture may cause the battery to
rust.
●Do not touch or move any other com-
ponent inside the remote control.
●Do not bend either of the battery ter-
minals.
Checking and replacing
fuses
If any of the electrical components
do not operate, a fuse may have
blown. If this happens, check and
replace the fuses as necessary.
Checking and replacing fuses

325
LC500_LC500h_OM_OM11405U_(U)
7
7
When trouble arises
When trouble arises
7-1. Essential informationEmergency flashers.................. 326
If your vehicle has to be stopped in an emergency .......................... 326
7-2. Steps to take in an emergency If your vehicle needs to be towed........................................................ 328
If you think something is wrong ........................................................ 332
Fuel pump shut off system (LC500).................................... 333
If a warning light turns on or a warning buzzer sounds ....... 334
If a warning message is displayed ........................................................ 344
If you have a flat tire.................. 350
If the engine will not start (LC500)..................................... 351
If the hybrid system will not start (LC500h) ................................. 352
If you lose your keys ................. 354
If the fuel filler door cannot be opened........................................ 354
If the electronic key does not operate properly .................... 355
If the 12-volt battery is discharged ........................................................ 357
If your vehicle overheats (LC500).................................... 364
If your vehicle overheats (LC500h) ................................. 366
If the vehicle becomes stuck 370