2010 Lexus HS250h battery

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Page 411 of 608

Lexus HS250h 2010  Using the Bluetooth audio system / LEXUS 2010 HS250H OWNERS MANUAL (OM75006U) 411
4-2. Maintenance
4
Maintenance and care
General maintenance
Engine compartment
Tr u n k
ItemsCheck points
Brake fluidIs the brake fluid at the correct level?
( P.  4 3 1 )
CoolantIs the engi

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Lexus HS250h 2010  Using the Bluetooth audio system / LEXUS 2010 HS250H OWNERS MANUAL (OM75006U) 415
4-2. Maintenance
4
Maintenance and care
Emission inspection and maintenance (I/M) programs
Some states have vehicle emission inspection programs which include 
OBD (On Board Diagnostics) checks.

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Lexus HS250h 2010  Using the Bluetooth audio system / LEXUS 2010 HS250H OWNERS MANUAL (OM75006U) 416
4-3. Do-it-yourself maintenance
Do-it-yourself service precautions
If you perform maintenance by yourself, be sure to follow the correct pro-
cedure as given in these sections.
ItemsPa r t s  a n

Page 433 of 608

Lexus HS250h 2010  Using the Bluetooth audio system / LEXUS 2010 HS250H OWNERS MANUAL (OM75006U) 433
4-3. Do-it-yourself maintenance
4
Maintenance and care
12-volt battery
■Location
The 12-volt battery is located on 
the right-hand side of the lug-
gage compartment.
■ Open the co
 ver
Lift up

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Lexus HS250h 2010  Using the Bluetooth audio system / LEXUS 2010 HS250H OWNERS MANUAL (OM75006U) 434
4-3. Do-it-yourself maintenance
■Before recharging
When recharging, the 12-volt battery produces hydrogen gas which is flammable 
and 
explosive. Therefore, observe the following precautions bef

Page 435 of 608

Lexus HS250h 2010  Using the Bluetooth audio system / LEXUS 2010 HS250H OWNERS MANUAL (OM75006U) 435
4-3. Do-it-yourself maintenance
4
Maintenance and care
CAUTION
■Chemicals in the 12-volt battery
The 12-volt battery contains poisonous and corrosive sulfuric acid and may pro-
duce hydrogen gas

Page 436 of 608

Lexus HS250h 2010  Using the Bluetooth audio system / LEXUS 2010 HS250H OWNERS MANUAL (OM75006U) 436
4-3. Do-it-yourself maintenance
CAUTION
■When replacing the 12-volt battery
Use a 12-volt battery designed for this vehicle. Failure to do so may cause gas 
(hydrogen) to enter the passenger com

Page 453 of 608

Lexus HS250h 2010  Using the Bluetooth audio system / LEXUS 2010 HS250H OWNERS MANUAL (OM75006U) 453
4-3. Do-it-yourself maintenance
4
Maintenance and care
Electronic key battery
Replace the battery with a new one if it is depleted.
■You will need the following items:
●F
lathead screwdriver