2007 Lexus IS250 air condition

311
4-3. Do-it-yourself maintenance
4
Maintenance and care
■Engine compartment (type B)
FuseAmpereCircuit
1FR CTRL-B25AHeadlight high beam, horn
2A/F15AExhaust system
3ETCS10A
Multiport fuel injection system/
sequential multiport fuel injection sys-
tem
4ALT-S7. 5 ACharging system
5STR LOCK25ASteering lock
6H-LP CLN30AHeadlight cleaner
7A/C COMP7. 5 AAir conditioning system
8DEICER25A
9FR CTRL-AM30AFront fog lights, parking lights, wind-
shield washer
10IG210AIgnition system
11EFI NO.210AFuel system, exhaust system
12H-LP R LWR15AHeadlight low beam (right)
13H-LP L LWR15AHeadlight low beam (left)

313
4-3. Do-it-yourself maintenance
4
Maintenance and care
■Driver’s side instrument panel
FuseAmpereCircuit
1FR P/SEAT LH30APo w e r s e a t
2A/C7. 5 AAir conditioning system
3MIR HTR15AOutside rear view mirror defoggers
4TV NO.110ADisplay
5FUEL OPEN10AFuel filler door opener
6TV NO.27. 5 A
7PSB30APre-collision seat belt
8S/ROOF25AElectric moon roof
9TA I L10ATail lights, license plate lights, parking
lights
10PA N E L7. 5 ASwitch illumination, air conditioning
system, display
11RR FOG7. 5 A
12ECU-IG LH10A
Cruise control, air conditioning sys-
tem, power steering, rain sensor, anti-
glare inside rear view mirror, shift lock
system, moon roof, tire inflation pres-
sure warning system
13FR S/HTR LH15ASeat heaters and ventilators

314
4-3. Do-it-yourself maintenance
FuseAmpereCircuit
14RR DOOR LH20APo w e r w i n d o w s
15FR DOOR LH20APo w e r w i n d o w s
16SECURITY7. 5 ASmart access system with push-button
start
17H-LP LVL7. 5 AAFS
18LH-IG10A
Charging system, headlight cleaner,
rear window defogger, electric cool-
ing fans, emergency flashers, turn sig-
nal lights, back-up lights, stop lights,
mirror heaters, sun shade, seat belts,
Lexus parking assist-sensor, cruise
control, air conditioning system, PTC
heater
19FR WIP30AWindshield wipers

315
4-3. Do-it-yourself maintenance
4
Maintenance and care
■Passenger’s side instrument panel
FuseAmpereCircuit
1FR P/SEAT RH30APo w e r s e a t
2DOOR DL15A
3OBD7. 5 AOn-board diagnosis system
4STOP SW7. 5 AStop lights
5TI & TE20AElectric tilt and telescopic steering
column
6RAD NO.310AAudio
7GAUGE7. 5 AMeter
8IGN10ASRS 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
10CIG15ACigarette lighter
11PWR OUTLET15APo w e r o u t l e t
12RR DOOR RH20APo w e r w i n d o w s

316
4-3. Do-it-yourself maintenance
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
seat 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 9 )
●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
335
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 temperature 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, spongy feeling, pedal almost touches
the floor

5
When trouble arises
375
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 carefully 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 7 1 )
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

403
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 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-
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