2014 Lexus IS300h battery

4497-3. Do-it-yourself maintenance
7
Maintenance and care
IS300h_EE(OM53C61E)
CAUTION
■Chemicals in the 12-volt battery
The 12-volt battery contains poisonous and corrosive sulfuric acid and may produce
hydrogen gas which is flammable and explosive. To reduce the risk of death or serious
injury, take the following precautions 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 battery in
a garage or closed room where there is insufficient ventilation.
■How to recharge the 12-volt battery
Only perform a slow charge (4 A — 5 A). The 12-volt battery may explode if charged at
a quicker rate.
■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 fol-
low the procedure above if necessary.
●If you accidentally swallow electrolyte
Drink a large quantity of water or milk. Get emergency medical attention immedi-
ately.
■When replacing the 12-volt battery
Use a 12-volt battery designed for this vehicle. Failure to do so may cause gas (hydro-
gen) to enter the passenger compartment, causing a fire or explosion.
For replacement of the 12-volt battery, contact any authorized Lexus dealer or repairer,
or another duly qualified and equipped professional.
NOTICE
■When recharging the 12-volt battery
Never recharge the 12-volt battery while the hybrid system is operating. Also, be sure
all accessories are turned off.
IS300h_EE_OM53C61E.book 449 ページ ２０１４年５月２０日　火曜日　午後５時４０分

4607-3. Do-it-yourself maintenance
IS300h_EE(OM53C61E)
Remove the 12-volt battery cover. (→P. 4 4 7 )
Take out the jack.
For tightening
For loosening
If the jack is too tightly installed to be
removed by hand, insert a tool, such
as the screwdriver included with the
vehicle, into the hole of the jack (por-
tion “A”) and loosen the jack.
CAUTION
■Using the tire jack
Observe the following precautions.
Improper use of the tire jack may cause the vehicle to suddenly fall off the jack, leading
to death or serious injury.
●Do not use the tire jack for any purpose other than replacing tires or installing and
removing tire chains.
●Only use the tire jack that comes with this vehicle for replacing a tire.
Do not use it on other vehicles, and do not use other tire jacks for replacing tires on
this vehicle.
●Put the jack properly in its jack point.
●Do not put any part of your body under the vehicle while it is supported by the jack.
●Do not start the hybrid system or drive the vehicle while the vehicle is supported by
the jack.
●Do not raise the vehicle while someone is inside.
●When raising the vehicle, do not put an object on or under the jack.
●Do not raise the vehicle to a height greater than that required to replace the tire.
●Use a jack stand if it is necessary to get under the vehicle.
●When lowering the vehicle, make sure that there is no-one near the vehicle. If there
are people nearby, warn them vocally before lowering.
Taking out the jack
1
2
1
2
IS300h_EE_OM53C61E.book 460 ページ ２０１４年５月２０日　火曜日　午後５時４０分

4717-3. Do-it-yourself maintenance
7
Maintenance and care
IS300h_EE(OM53C61E)
●Flathead screwdriver
●Small flathead screwdriver
●Lithium battery CR2032
Take out the mechanical key.
Remove the cover.
To prevent damage to the key, wrap the
tip of the screwdriver with tape.
Remove the battery cover.
To prevent damage to the key, wrap the
tip of the screwdriver with tape.
Electronic key battery
Replace the battery with a new one if it is depleted.
You will need the following items:
Replacing the battery
1
2
3
IS300h_EE_OM53C61E.book 471 ページ ２０１４年５月２０日　火曜日　午後５時４０分

4727-3. Do-it-yourself maintenance
IS300h_EE(OM53C61E)
Remove the depleted battery.
Insert a new battery with the “+” termi-
nal facing up.
■Use a CR2032 lithium battery
●Batteries can be purchased at any authorized Lexus dealer or repairer, or another duly
qualified and equipped professional, 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 local laws.
■When the card key battery needs to be replaced (if equipped)
The battery for the card key is available only at Lexus dealers. Your Lexus dealer can
replace the battery for you.
■If the electronic key battery is depleted
The following symptoms may occur:
●The smart entry & start system and wireless remote control will not function properly.
●The operational range will be reduced.
■Certification for the key battery
●Replace only with the same or equivalent type recommended by the manufacturer.
●Dispose of used batteries according to local laws.
4
IS300h_EE_OM53C61E.book 472 ページ ２０１４年５月２０日　火曜日　午後５時４０分

4737-3. Do-it-yourself maintenance
7
Maintenance and care
IS300h_EE(OM53C61E)
CAUTION
■Removed battery and other parts
These parts are small and if swallowed by a child, they can cause choking. Keep away
from children. Failure to do so could result in death or serious injury.
■Lithium battery precautions
RISK OF EXPLOSION IF BATTERY IS REPLACED BY AN INCORRECT TYPE.
DISPOSE OF USED BATTERIES ACCORDING TO THE INSTRUCTIONS
NOTICE
■For normal operation after replacing the battery
Observe the following precautions to prevent accidents:
●Always work with dry hands.
Moisture may cause the battery to rust.
●Do not touch or move any other component inside the remote control.
●Do not bend either of the battery terminals.
IS300h_EE_OM53C61E.book 473 ページ ２０１４年５月２０日　火曜日　午後５時４０分

493
8When trouble arises
IS300h_EE(OM53C61E)
8-1. Essential information
Emergency flashers................... 494
If your vehicle has to
be stopped in an
emergency ................................. 4958-2. Steps to take in an
emergency
If your vehicle needs to
be towed ..................................... 496
If you think something is
wrong ...........................................502
If a warning light turns
on or a warning buzzer
sounds..........................................503
If a warning message is
displayed.....................................509
If you have a flat tire
(vehicles without
run-flat tires).............................. 526
If you have a flat tire
(vehicles with
run-flat tires)..............................540
If the hybrid system will
not start ........................................ 541
If the shift lever cannot
be shifted from P ..................... 543
If the electronic key does
not operate properly ............. 544
If the 12-volt battery is
discharged ................................. 547
If your vehicle overheats ......... 552
If the vehicle becomes
stuck ............................................. 556
IS300h_EE_OM53C61E.book 493 ページ ２０１４年５月２０日　火曜日　午後５時４０分

494
IS300h_EE(OM53C61E)8-1. Essential information
Press the switch.
All the turn signals will flash.
To turn them off, press the switch once
again.
■Emergency flashers
If the emergency flashers are used for a long time while the hybrid system is not operat-
ing (while the “READY” indicator is not illuminated), the 12-volt battery may discharge.
Emergency flashers
The emergency flashers are used to warn other drivers when the vehicle has
to be stopped in the road due to a breakdown, etc.
IS300h_EE_OM53C61E.book 494 ページ ２０１４年５月２０日　火曜日　午後５時４０分

5068-2. Steps to take in an emergency
IS300h_EE(OM53C61E)*
1: Parking brake engaged warning buzzer:
→P. 5 1 3
*2: Open door warning buzzer:
→P. 5 1 1
*3: Seat belt warning buzzer:
The seat belt warning buzzer sounds to alert the driver, front passenger and rear pas-
sengers that his or her seat belt is not fastened. The buzzer sounds for 30 seconds
after the vehicle reaches a speed of 20 km/h (12 mph). Then, if the seat belt is still
unfastened, the buzzer will sound in a different tone for 90 more seconds.
■Passenger detection sensor, seat belt reminder and warning buzzer
●If luggage is placed on a passenger seat, the passenger detection sensor may cause the
warning light to flash and the warning buzzer to sound even if a passenger is not sitting
in the seat.
●If a cushion is placed on the seat, the sensor may not detect a passenger, and the warn-
ing light may not operate properly.
■If the malfunction indicator lamp comes on while driving
The malfunction indicator lamp will come on if the fuel tank becomes completely empty.
If the fuel tank is empty, refuel the vehicle immediately. The malfunction indicator lamp
will go off after several trips.
If the malfunction indicator lamp does not go off, contact any authorized Lexus dealer or
repairer, or another duly qualified and equipped professional as soon as possible.
■Electric power steering system warning light (warning buzzer)
When the 12-volt battery charge becomes insufficient of the voltage temporarily drops,
the electric power steering system warning light may come on and the warning buzzer
may sound.
■When the tire pressure warning light comes on
Carry out the following procedure after the tire temperature has lowered sufficiently.
●Check the tire inflation pressure and adjust to the appropriate level.
●If the warning light does not go out even after several minutes, check that the tire infla-
tion pressure is at the specified level and carry out initialization.
The warning light may come on again if the above operations are conducted without first
allowing the tire temperature to lower sufficiently.
■The tire pressure warning light may come on due to natural causes
The tire pressure warning light may come on due to natural causes such as natural air
leaks and tire inflation pressure changes caused by temperature. In this case, adjusting
the tire inflation pressure will turn off the warning light (after a few minutes).
■Conditions that the tire pressure warning system may not function properly
→P. 4 5 4
IS300h_EE_OM53C61E.book 506 ページ ２０１４年５月２０日　火曜日　午後５時４０分