2006 Lexus IS250 air conditioning

311
4-3. Do-it-yourself maintenance
4
Maintenance and care
FuseAmpereCircuit
13FR DOOR RH20APower windows, outside rear view
mirrors
14AM215ASmart access system with push-button
start
15RH-IG7. 5 A
Seat belts, Lexus parking assist-sen-
sor, automatic transmission, seat
heater and ventilator
16FR S/HTR RH15ASeat heaters and ventilators
17ECU-IG RH10A
Power seats, smart access system with
push-button start, AWD system, out-
side rear view mirrors, VDIM, VSC,
air conditioning system, pre-collision
safety belt, electric tilt and telescopic
steering, power windows, navigation
system
■After a fuse is replaced
●If the lights do not turn on even after the fuse has been replaced, a bulb may
need replacement. ( P. 3 1 4 )
●If the replaced fuse blows again, have the vehicle inspected by your Lexus
dealer.
■If there is an overload in the circuits
The fuses are designed to blow before the entire wiring harness is damaged.

5
When trouble arises
329
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.
■Visible symptoms
●Fluid leaks under the vehicle
(Water dripping from the air conditioning after use is normal.)
● Flat-looking tires or uneven tire wear
● Engine coolant temper ature gauge needle continually points
higher than normal
■ Audible symptoms
●Changes in exhaust sound
● Excessive tire squeal when cornering
● Strange noises related to the suspension system
● Pinging or other noises related to the engine
■ Operational symptoms
●Engine missing, stumbling or running rough
● Appreciable loss of power
● Vehicle pulls heavily to one side when braking
● Vehicle pulls heavily to one side when driving on a level road
● Loss of brake effectiveness, sp ongy feeling, pedal almost touches
the floor

5
When trouble arises
369
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 and car efully lift the hood.
If you do not see steam: Leave the engine running and carefully lift the hood.
Remove the engine compartment cover. ( P. 2 6 7 )
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

397
6-1. Specifications
6
Vehicle specifications
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 build up 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-
sureTire 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
Maximum inflation pres-
sureThe maximum cold inflated pressure to which a tire
may be inflated, shown on the sidewall of the tire
Maximum loaded vehicle
weight
The sum of:
(a) Curb weight
(b) Accessory weight
(c) Vehicle capacity weight
(d) Production options weight
Normal occupant weight150 lb. (68 kg) times the number of occupants speci-
fied in the second column of Table 1
* that follows

408
Alphabetical index
Alphabetical index
A/C (Air conditioning system) ........ 166
ABS (Anti-lock brake system) ......... 144
AFS (Adaptive front lighting system) ......................................................119
Adaptive front lighting system (AFS)..........................................................119
Air conditioning filter ..........................295
Air conditioning system (A/C) Air conditioning filter ....................... 295
Automatic air conditioning system ....................................................166
Airbags Airbag operating conditions........... 63
Airbag precautions for your child.......................................................... 67
Airbag warning light ........................ 334
Curtain shield airbag operating conditions.............................................. 63
Curtain shield airbag precautions .......................................... 67
General airbag precautions ........... 67
Locations of airbags.............................. 61
Modification and disposal of airbags ...................................................... 71
Proper driving po sture ............. 59, 67
Side airbag operating conditions.............................................. 63
Side airbag precautions .................... 67
SRS airbags ............................................... 61
Alarm ............................................................ 56
Antenna ..................................................... 182
Anti-lock brake system (ABS) ......... 144
Armrest .....................................................228
Ashtrays ..................................................... 221
Audio system Antenna ............................................... 182
AUX adapter....................................... 202 CD player/changer ...........................185
MP3/WMA disc................................... 191
Optimal use ........................................... 199
Radio ......................................................... 178
Steering wheel audio switch........ 203
Automatic air conditioning system ......................................................166
Automatic headlight leveling system ..................................................... 120
Automatic light control system.......... 118
Automatic transmission Automatic transmission ..................... 97
If the shift lever cannot be shifted from P..................................... 361
S mode .......................................................99
AUX adapter ......................................... 202
BA (Brake assist) ....................................144
Back-up lights Wattage .................................................388
Battery Checking................................................275
If the vehicle has discharged battery ................................................. 366
Preparing and checking before winter...................................... 156
Bottle holders...........................................213
Brake Fluid ........................................................... 274
Parking brake........................................ 104
Brake assist (BA) ....................................144
Care Exterior ................................................... 248
Interior..................................................... 250
Seat belts ................................................. 251A
B
C