air condition LEXUS IS250 2016 Owner's Guide

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4-3. Do-it-yourself maintenance
nPassenger’s side instrument panel
FuseAmpereCircuit
1FR P/SEAT RH30 APo w e r s e a t
2DOOR DL15 A
3OBD7. 5 AOn-board diagnosis system
4STOP SW7. 5 AStop lights
5TI & TE20 AElectric tilt and telescopic steering
column
6RAD NO.310 AAudio
7GAUGE7. 5 AMeter
8IGN10 ASRS airbag system, cruise control,
steering lock system, fuel system
9ACC7. 5 A
Lexus link system, clock, air condition-
ing system, audio, display, outside rear
view mirrors, smart access system
with push-button start
10CIG15 ACigarette lighter
11PWR OUTLET15 APo w e r o u t l e t
12RR DOOR RH20 APo w e r w i n d o w s

5

When trouble arises
379
5-1. Essential information
If you think something is wrong
If you notice any of the following symptoms, your vehicle probably needs
adjustment or repair. Contact your Lexus dealer as soon as possible.
nVisible symptoms
lFluid leaks under the vehicle
(Water dripping from the air conditioning after use is normal.)
lFlat-looking tires or uneven tire wear
lEngine coolant temperature gauge needle continually points
higher than normal
nAudible symptoms
lChanges in exhaust sound
lExcessive tire squeal when cornering
lStrange noises related to the suspension system
lPinging or other noises related to the engine
nOperational symptoms
lEngine missing, stumbling or running rough
lAppreciable loss of power
lVehicle pulls heavily to one side when braking
lVehicle pulls heavily to one side when driving on a level road
lLoss of brake effectiveness, spongy feeling, pedal almost touches
the floor

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5-2. Steps to take in an emergency
If your vehicle overheats
If your engine overheats:
Stop the vehicle in a safe place and turn off the automatic air
conditioning system.
Check to see if steam is coming out from under the hood.
If you see steam:
Stop the engine. Carefully lift the hood after the steam sub-
sides and then restart the engine.
If you do not see steam:
Leave the engine running and carefully lift the hood.
Remove the engine compartment cover. (→P. 312)
Check to see if the cooling fan is operating.
If the fan is operating:
Wait until the temperature of the engine (shown on the
instrument cluster) begins to fall and then stop the engine.
If the fan is not operating:
Stop the engine immediately and call your local Lexus
dealer.
After the engine has cooled
down sufficiently, check the
engine coolant level and inspect
the radiator core (radiator) for
any leaks.
STEP1
STEP2
STEP3
STEP4
STEP5

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6-1. Specifications
nTemperature A, B, C
The temperature grades are A (the highest), B, and C, representing
the tire's resistance to the generation of heat and its ability to dissipate
heat when tested under controlled conditions on a specified indoor
laboratory test wheel.
Sustained high temperature can cause the material of the tire to degenerate
and reduce tire life, and excessive temperature can lead to sudden tire fail-
ure.
The grade C corresponds to a level of performance which all passenger car
tires must meet under the Federal Motor Vehicle Safety Standard No. 109.
Grades B and A represent higher levels of performance on the laboratory
test wheel than the minimum required by law.
Warning: The temperature grades for this tire are established for a tire that
is properly inflated and not overloaded.
Excessive speed, underinflation, or excessive loading, either separately or in
combination, can cause heat buildup and possible tire failure.
Glossary of tire terminology
Tire related termMeaning
Accessory weight
The combined weight (in excess of those standard
items which may be replaced) of automatic transmis-
sion, power steering, power brakes, power windows,
power seats, radio and heater, to the extent that these
items are available as factory-installed equipment
(whether installed or not)
Cold tire inflation pres-
sure
Tire pressure when the vehicle has been parked for
three hours or more, or has not been driven more
than 1 mile or 1.5 km under that condition
Curb weight
The weight of a motor vehicle with standard equip-
ment, including the maximum capacity of fuel, oil and
coolant, and if so equipped, air conditioning and
additional weight optional engine

476
Alphabetical index
Alphabetical index
A/C............................................................. 210
ABS.............................................................. 186
AFS .............................................................. 157
Adaptive front lighting system ......... 157
Air conditioning filter .......................... 342
Air conditioning system
Air conditioning filter ....................... 342
Automatic air conditioning
system ....................................................210
Airbags
Airbag operating conditions........... 86
Airbag precautions for your
child.......................................................... 90
Airbag warning light ........................384
Curtain shield airbag operating
conditions.............................................. 87
Curtain shield airbag
precautions .......................................... 90
Front passenger occupant
classification system......................... 95
General airbag precautions ........... 90
Locations of airbags............................ 84
Modification and disposal of
airbags .................................................... 94
Proper driving posture ............. 82, 90
Side airbag operating
conditions.............................................. 87
Side airbag precautions .................... 90
SRS airbags ............................................. 84
Alarm ............................................................ 79
Antenna .................................................... 226
Anti-lock brake system ....................... 186
Armrest ..................................................... 272
Ashtrays .................................................... 263
Audio input .............................................. 244
Audio system
Antenna...................................................226
Audio input ............................................244
AUX adapter .......................................244
CD player/changer ..........................229
MP3/WMA disc............................... 235
Optimal use ........................................... 241
Portable music player ......................244
Radio ........................................................ 222
Steering wheel audio switch........ 245
Automatic air conditioning
system ..................................................... 210
Automatic headlight leveling
system ..................................................... 158
Automatic light control system.........156
Automatic transmission
Automatic transmission ..................... 131
If the shift lever cannot be
shifted from P..................................... 415
S mode ..................................................... 134
AUX adapter ......................................... 244
Back-up lights
Wattage ................................................. 445
Battery
Checking................................................. 321
If the vehicle has discharged
battery ................................................... 421
Preparing and checking
before winter.................................... 200
Bottle holders......................................... 256
Brake
Fluid ............................................................ 319
Parking brake........................................ 140
Brake assist .............................................. 186
A
B

Entering and Exiting
Before Driving
When Driving
Rain and
Night Driving
Driving Comfort
Opening and Closing
What to do if ...
Customizing
Yo u r L e x u s
2
IS_U (L/O_0808)

Driving Comfort Topic 5
Opening and ClosingTopic 6
What to do if ...
Customizing Your Lexus Responding to warning/indicator lights
and other problems that may arise.
A list of features that can be customized. Rain and Night DrivingTopic 4
lHeadlightsP. 33
lFog LightsP. 3 4
lWindshield Wipers and
Wa s h e rP. 3 5
lHeadlight CleanerP. 3 7
lRear Window and Outside Rear
View Mirror DefoggersP. 3 7
l

Instrument Panel Light Control
P. 3 7
lInterior LightsP.4 9
lRear SunshadeP. 4 9
lCompassP. 5 0
lTrunk Storage ExtensionP. 5 0
lLuggage MatP. 5 1
lDoor LocksP.5 3
lPo w e r Wi n d o w sP. 5 4
lMoon RoofP. 5 4
lFuel Tank CapP. 5 5
lHoodP. 5 5
lTr u n kP. 5 6
lAudio SystemP.3 9
lAir Conditioning SystemP. 4 2
lGarage Door OpenerP. 4 3
lAshtraysP. 4 5
lSeat Heaters/Seat Heaters
and VentilatorsP. 4 6
lConsole BoxesP. 4 7
lGlove BoxP. 4 8
lCup HoldersP. 4 8
Depending on specifications, the vehicle shown in the illustration maydiffer from your vehicle in terms of color and equipment.

4
IS_U (L/O_0808)
Shift paddle switches (automatic transmission)
P.20
Windshield wipers and
washer switch P.35
Engine (ignition) switch P.19
Air conditioning system P.42
Emergency flasher switch P.26
Rear window and outside rear
view mirror defoggers P.37
Security indicator light P.9
Audio system P.39
Glove box P.48
Trunk opener main switch P.56
See P.5.
Cruise control switch ∗
Dynamic radar cruise control switch ∗
P.29
P.30
Distance switch ∗ P.30
ECT switch (automatic transmission)
ETCS switch (manual transmission)
P.27
P.27
∗ : If equipped

Topic 5
Driving Comfort
42

Entering and Exiting
When Driving
Rain and
Night Driving
Driving Comfort
Driving Comfort
Opening and Closing
What to do if ...
Customizing
Yo u r L e x u s
Before Driving
IS_U (L/O_0808)
Air Conditioning System (wit hout navigation system)
Owners of models equipped with a navigation system should refer to the “Navigation System
Owner's Manual”.
nUsing the automatic mode
Press the AUTO button.
Adjust the temperature using the TEMP but-
tons.
nAdjusting the temperature in DUAL mode
In DUAL mode, driver and passenger side tem-
perature settings can be adjusted separately.
Press the DUAL button.
Adjust the driver side temperature using the
TEMP buttons, and the passenger side temper-
ature using the PASSENGER TEMP buttons.
Driver side temperature control
Switch to automatic mode
Driver side temperature display
OFF button
Fan speed controls
Air flow controls
Passenger side temperature display
Micro dust and pollen filter
Passenger side temperature control
Windshield defog/defrost
Outside air/recirculated air mode switch
A/C switch
Dual mode switch
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