2017 Lexus IS300h battery

5107-2. Maintenance
IS300h_EE(OM53D89E)
■Where to go for maintenance service?
In order to maintain your vehicle in the be st possible condition, Lexus recommends that
maintenance service operations as well as other inspections and repairs be carried out by authorized Lexus reta ilers or Lexus authorized repairers, or any reliable repairers. For
repairs and services covered by your warranty, please visit an authorized Lexus retailer
or repairer, who will use genuine Lexus pa rts in repairing any difficulties you may encounter. There can also be advantages in utilizing authorized Lexus retailers or repair-
ers for non-warranty repairs an d services, as members of the Lexus network will be able
to expertly assist you with an y difficulties you may encounter.
Your authorized Lexus retailer or Lexus author ized repairer, or any reliable repairer will
perform all of the scheduled maintenance on your vehicle reliably and economically due
to their experience with Lexus vehicles.
■Does your vehicle need repairs?
Be on the alert for changes in performance an d sounds, and visual tip-offs that indicate
service is needed. Some important clues are:
●Engine missing, stumbling or pinging
●Appreciable loss of power
●Strange engine noises
●A fluid leak under the vehicle (However, wate r dripping from the air conditioning sys-
tem after use is normal.)
●Change in exhaust sound (This may indicate a dangerous carbon monoxide leak. Drive with the windows open and have the exhaust system checked immediately.)
●Flat-looking tires, excessive tire squeal when cornering, uneven tire wear
●Vehicle pulls to one side when driven straight on a level road
●Strange noises related to suspension movement
●Loss of brake effectiveness, spongy feeling brake pedal, pedal almost touches the floor,
vehicle pulls to one side when braking
●Engine coolant temperature cont inually higher than normal (P. 105)
If you notice any of these clues, take your vehicle to any authorized Lexus retailer or
Lexus authorized re pairer, or any reliable repairer as soon as possible. Your vehicle may need adjustment or repair.
WARNING
■If your vehicle is not properly maintained
Improper maintenance could result in se rious damage to the vehicle and possible death or serious injury.
■Handling of the 12-volt battery
12-volt battery posts, terminals and related accessories contain lead and lead com- pounds which are known to cause brain da mage. Wash your hands after handling.
( P. 522)

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Maintenance and care
IS300h_EE(OM53D89E)
7-3. Do-it-yourself maintenance
Do-it-yourself service precautions
If you perform maintenance by yourself, be sure to follow the correct proce-
dure as given in these sections.
ItemsParts and tools
12-volt battery con-
dition ( P. 522)
•Grease
• Conventional wrench (for terminal clamp bolts)
Engine/power con- trol unit coolant level
( P. 519)
• “Toyota 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
technology “Toyota Super Long Life Coolant” is pre-mixed with 50%
coolant and 50% deionized water.
• Funnel (used only for adding coolant)
Engine oil level ( P. 516)
• “Toyota Genuine Motor Oil” or equivalent
• Rag or paper towel
• Funnel (used only for adding engine oil)
Fuses (P. 552)• Fuse with same amperage rating as original
Light bulbs
( P. 556)
• Bulb with same number and wattage rating as original
• Phillips-head screwdriver•Flathead screwdriver
•Wrench
Radiators and con-
denser ( P. 521)
Tire inflation pres-
sure ( P. 543)• Tire pressure gauge• Compressed air source
Washer fluid
( P. 521)
• Water or washer fluid containing antifreeze (for winter use)
• Funnel (used only for adding water or washer fluid)

5157-3. Do-it-yourself maintenance
7
Maintenance and care
IS300h_EE(OM53D89E)
■12-volt battery
 P. 522
Engine compartment
Power control unit coolant reser-
voir ( P. 519)
Engine oil level dipstick
( P. 516)
Engine coolant reservoir
( P. 519)
Engine oil filler cap
( P. 517)
Fuse box ( P. 552)
Washer fluid tank ( P. 521)
Electric cooling fans
Condenser ( P. 521)
Power control unit coolant
radiator ( P. 521)
Engine coolant radiator
( P. 521)
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5227-3. Do-it-yourself maintenance
IS300h_EE(OM53D89E)
The 12-volt battery is located on the
left-hand side of luggage compart-
ment.
Remove the 12-volt battery cover.
Make sure that the 12-volt battery terminals are not corroded and that there are
no loose connections, cracks, or loose clamps.
Terminals
Hold-down clamp
12-volt battery
Location
Removing the 12-volt battery cover
Exterior
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5237-3. Do-it-yourself maintenance
7
Maintenance and care
IS300h_EE(OM53D89E)
The meanings of each caution symbol on the top of the 12-volt battery are as fol-
lows:
■Before recharging
When recharging, the 12-volt battery produc es hydrogen gas which is flammable and
explosive. Therefore, observe the following precautions before recharging:
●If recharging with the 12-volt battery installed on the vehicle, be sure to disconnect the
ground cable.
●Make sure the power switch on the charge r is off when connecting and disconnecting
the charger cables to the 12-volt battery.
■After recharging/reconnecting the 12-volt battery
●The hybrid system may not start. Follow the procedure below to initialize the system.
Shift the shift lever to P.
Open and close any of the doors.
Restart the hybrid system.
●Unlocking the doors using the smart entry & start system may not be possible immedi- ately after reconnecting the 12-volt battery. If this happens, use the wireless remote
control or the mechanical key to lock/unlock the doors.
●Start the hybrid system with the power switch in ACCESSORY mode. The hybrid sys- tem may not start with the power switch turned off. However, the hybrid system will
operate normally from the second attempt.
●The power switch mode is recorded by the vehicle. If the 12-volt battery is reconnected, the vehicle will return the power switch mode to the status it was in before the 12-volt
battery was disconnected. Make sure to turn off the power switch before disconnecting
the 12-volt battery. Take extra care when connecting the 12-volt battery if the power switch mode prior to the 12-volt battery being disconnected is unknown.
If the system will not start ev en after multiple attempts at all the methods above, contact
any authorized Lexus retailer or Lexus author ized repairer, or any reliable repairer.
Caution symbols
No smoking, no naked flames, no sparks12-volt battery acid
Shield eyesNote operating instructions
Keep away from childrenExplosive gas
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5247-3. Do-it-yourself maintenance
IS300h_EE(OM53D89E)
WARNING
■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 th ere 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 re garding 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 wa ter 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 sk in. 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 compartm ent, causing a fire or explosion.
For replacement of the 12-volt battery, contact any authorized Lexus retailer or Lexus authorized repairer, or any reliable repairer.
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.

5387-3. Do-it-yourself maintenance
IS300h_EE(OM53D89E)
Remove the 12-volt battery cover. (P. 522)
Take out the jack.
For tightening
For loosening
If the jack is too ti ghtly 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.
WARNING
■Using the tire jack
Observe the following precautions.
Improper use of the tire jack may cause the ve hicle to suddenly fall off the jack, leading
to death or serious injury.
●Do not use the tire jack for any purpose ot her 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 no t 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 pu t 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
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5497-3. Do-it-yourself maintenance
7
Maintenance and care
IS300h_EE(OM53D89E)
●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
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