2012 Lexus IS F charging

5
When trouble arises
503
5-2. Steps to take in an emergency
IS F_U
■Starting the engine when the battery is discharged
The engine cannot be started by push-starting.
■To prevent battery discharge
●Turn off the headlights and the audio system while the engine is off.
●Turn off any unnecessary electrical components when the vehicle is running at a
low speed for an extended period, such as in heavy traffic, etc.
■Charging the battery
The electricity stored in the battery will discharge gradually even when the vehi-
cle is not in use, due to natural discharge and the draining effects of certain
electrical appliances. If the vehicle is left for a long time, the battery may dis-
charge, and the engine may be unable to start. (The battery recharges automat-
ically during driving.)
Start the engine of the second vehicle. Increase the engine
speed slightly and maintain at that level for approximately 5
minutes to recharge the battery of your vehicle.
Open and close any of the doors with the “ENGINE START
STOP” switch OFF.
Maintain the engine speed of the second vehicle and turn the
“ENGINE START STOP” switch to IGNITION ON mode,
then start the vehicle’s engine.
Once the vehicle’s engine has started, remove the jumper
cables in the exact reverse order in which they were con-
nected.
Once the engine starts, have the vehicle checked at your Lexus dealer
as soon as possible.STEP2
STEP3
STEP4
STEP5

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6-1. Specifications
IS F_U
Ignition system
Electrical system
Differential
*: Your Lexus vehicle is filled with “Toyota Genuine Differential Gear Oil” at the
factory. Use Lexus approved “Toyota Genuine Differential Gear Oil” or an
equivalent of matching quality to satisfy the above specification. Please contact
your Lexus dealer for further details.
Spark plug
Make
GapDENSO FK20HBR11
0.043 in. (1.1 mm)
NOTICE
■Iridium-tipped spark plugs
Use only iridium-tipped spark plugs. Do not adjust gap when tuning the engine.
Battery
Open voltage* at
68 °F (20 °C):12.6  12.8 V Fully charged
12.2 
12.4 V Half charged
11.8 
12.0 V Discharged
(*: Voltage checked 20 minutes after
the engine and all the lights are turned
off)
Charging rates5 A max.
Oil capacity1.42 qt. (1.35 L, 1.19 Imp. qt.)
Oil type and viscosity*“Toyota Genuine Differential Gear Oil
LX 75W-85 GL-5” or equivalent

571
Alphabetical index
IS F_U
Warning lightsAnti-lock brake system .................. 464
Brake assist system .......................... 464
Brake system ....................................... 463
Charging system ............................... 464
Electric power steering system
warning light ..................................... 464
Low fuel level....................................... 466
Malfunction indicator lamp .......... 464
Master warning light ........................ 466
Open door ........................................... 466
Pre-collision system ......................... 464
Pretensioners ...................................... 464
Seat belt reminder light .................. 466
SRS airbags .......................................... 464
Tire pressure warning
light........................................................ 466 Warning messages
Automatic transmission
fluid ........................................................ 477
Dynamic radar
cruise control........................ 475, 477
Engine oil level .................................... 477
Engine oil maintenance .................. 477
Engine oil pressure ........................... 474
Engine oil temperature ................... 474
Headlight................................................ 475
Hood ........................................................ 477
Intuitive parking assist .......... 475, 477
Moon roof ............................................. 477
Open door ............................................ 477
Parking brake ...................................... 477
Pre-collision system.............. 475, 477
Smart access system with push-button start ........................... 483
Steering lock......................................... 475
Trunk ........................................................ 477
Washer fluid ......................................... 477
Washer
Checking .............................................. 409
Preparing and checking before winter ......................................214
Switch........................................................ 168
Washing and waxing ........................... 378
*: For vehicles with a navigation system, refer to the “Navigation System Owner’s Manual”.

575
What to do if...
IS F_U
P. 4 6 4P. 4 6 4
P. 4 6 6P. 4 6 4
P. 4 6 4P. 4 6 6
P. 4 6 4
SRS warning lightElectric power steering system
warning light
Open door warning lightPre-collision system warn-
ing light
Charging system warning
lightTire pressure warning light
Slip indicator
A warning message is dis-
playedP. 4 7 3If a warning message is displayed