air conditioning LEXUS LX470 2007 Owner's Manual

256
3-5. Other interior features
■Speech recognition information
The Lexus Link speech recognition systems use speech technology that is designed
to understand a wide range of speakers of American English. However, the technol-
ogy may not work as well if a regional or ethnic accent is encountered. If the speech
recognition system does not work properly, refer to the following.
●The system does not recognize your command properly if noise is preset. Per-
form the following to improve voice command recognition.
• Turn down or off the air conditioning system.
• Slow down to reduce wind noise.
• Close the windows and the moon roof to block outside noise.
• Have all occupants be quiet so that the system does not recognize their con- versation as a command.
●When to speak
Say a command within 5 seconds after the system prompts you to speak.
●How to speak
• Speak forcefully and clearly.
• Speak calmly and naturally.
• The driver should speak while facing forward, and the passenger should speak facing the inside rear view mirror.
• Avoid speaking with a rising intonati on. Use a flat or falling intonation.
●Tips for one-word commands
• The system recognizes only one word at a time for personal calling. (There
are some exceptions, such as “Advanced services” and “My number”.)
• When inputting the security codes or voice-activated keypad number, you
must say them one digit at a time. When inputting a phone number, the
speech recognition system can recogniz e 7, 10, and 11-digit numbers as well
as the number 911.

Maintenance and care4
259
4-1. Maintenance and care ......... 260Cleaning and protecting the vehicle exterior........................ 260
Cleaning and protecting the vehicle interior......................... 262 4-2. Maintenance........................... 265
Maintenance requirements............................ 265
General maintena nce .............. 267
Emission inspection and maintenance (I/M)
programs ................................... 270
4-3. Do-it-yourself maintenance.......................... 271
Do-it-yourself service precautions ................................. 271
Hood .............................................. 275
Engine compartment ............... 276
Tires ................................................. 292
Tire inflation pressure .............. 302
Wheels .......................................... 306
Air conditioning filter ............. 308
Wireless remote control battery ........................................ 309
Checking and replacing fuses ................................................ 311
Light bulbs.................................... 320

274
4-3. Do-it-yourself maintenance
CAUTION
The engine compartment contains many mechanisms and fluids that may move sud-
denly, become hot, or become electrically energized. To avoid death or serious injury.
■When working on the engine compartment
●Keep hands, clothing, and tools away from the moving fan and engine drive belt.
●Be careful not to touch the engine, inverter, radiator, exhaust manifold, etc. right
after driving as they may be hot. Oil and other fluids may also be hot.
●Do not leave anything that may burn easily, such as paper or rags, in the engine
compartment.
●Do not smoke, cause sparks or expose an open flame to fuel or the battery. Fuel
and battery fumes are flammable.
●Be extremely cautious when working on the battery. It contains poisonous and
corrosive sulfuric acid.
■When working near the electric cooling fan or radiator grille
Be sure the ignition is off. With the ignition in on, the electric cooling fan may auto-
matically start to run if the air conditioning is on and/or if the coolant temperature is
high.
(  P. 2 8 3 )
■When working on or under the vehicle
●Do not get under the vehicle with just the jack supporting it.
Always use automotive jack stands or other solid supports.
●Use eye protection to prevent flying or falling material, fluid spray, etc. from get-
ting in your eyes.
NOTICE
■If you remove the air cleaner filter
Driving with the air cleaner filter removed may cause excessive engine wear due to
dirt in the air. Also a backfire could cause a fire in the engine compartment.

308
4-3. Do-it-yourself maintenance
Air conditioning filter
■Changing interval
Inspect and replace the air conditioning filter according to the maintenance sched-
ule. In dusty areas or areas with heavy traffic flow, early replacement may be
required. (For scheduled maintenance information, refer to the “Warranty and Ser-
vices Guide/Owner's Manual Supplement/Scheduled Maintenance”.)
■If air flow from the vents decreases dramatically
The filter may be clogged. Check the filter and replace if necessary.
NOTICE
■When using the air conditioning system
Make sure that a filter is always installed.
Using the air conditioning system without a filter may cause damage to the system.
The air conditioning filter must be changed regularly to maintain air condi-
tioning efficiency.
■Information label
Contact your Lexus dealer for
further information when
replacing air conditioning filter.

314
4-3. Do-it-yourself maintenance
Fuse layout and amperage ratings■ Engine compartment
FuseAmpereCircuit
1ABS NO.240Anti-lock brake system
2ABS NO.150Anti-lock brake system
3AHC50Active height control suspension
(AHC)
4WIP-S7. 5No circuit
5TOW I N G30Trailer lights
6MIR HTR15Outside rear view mirror defogger
7RR HTR10Rear air conditioning system
8HAZ-TRN15Emergency flashers, Turn signal lights

317
4-3. Do-it-yourself maintenance
4
Maintenance and care
FuseAmpereCircuit
9AHC-IG20Active height control suspension
(AHC)
10EFI or ECD No.210Emission control system
11GAUGE 110Gauges and meters
12ECU-IG 110
Multiport fuel injection system/
Sequential multiport fuel injection
system
13ECU-B110Navigation system
14DBL LOCK15Double lock system
15A/C15Air conditioning system
16STOP15Stop lights
17OBD-27. 5On-board diagnosis system
18IDLE UP7. 5Idle-up system
19LH SEAT30Power seat system
20DOOR25Power door lock system, Power win-
dows
21SUN ROOF25Electronic moon roof
22RR WIPER15Rear wiper system

318
4-3. Do-it-yourself maintenance
■Passenger’s side instrument panel
FuseAmpereCircuit
1ECU-B210Power door lock system, Power win-
dow
2DIFF20Four-wheel drive system
3WA S H E R15Windshield washer
4RADIO10Audio system
5DOME10Interior lights
6VGRS40Variable gear ratio steering system
7P/ W ( F L )20Po w e r w i n d o w
8P/ W ( R L )20Po w e r w i n d o w
9WIPER25Windshield wiper
10ECU-IG 210Rear air conditioning system
11SEAT HTR15Seat heater
12GAUGE 210Back-up lights
13MET7. 5Gauges and meters
14IGN7. 5
Multiport fuel injection system/
Sequential multiport fuel injection
system
15SECURITY7. 5Theft deterrent system

319
4-3. Do-it-yourself maintenance
4
Maintenance and care
FuseAmpereCircuit
16P/W (RR)20Po w e r w i n d o w
17P/ W ( F R )20Po w e r w i n d o w
18BATT CHARGE30Trailer charging system
19TIL & TEL20Tilt and telescopic steering
20RR A/C30Rear air conditioning system
21RH SEAT30Power seat system
CAUTION
■To prevent system breakdowns and vehicle fire
Observe the following precautions.
Failing to do so may cause damage, and possibly a fire or injury.
●Never use a fuse of a higher amperage rating than indicated, or use any other
object in place of a fuse.
●Always use a genuine Lexus fuse or equivalent.
Never replace a fuse with a wire, even as a temporary fix.
This can cause extensive damage or even fire.
●Do not modify fuses or the fuse box.
NOTICE
■Before replacing fuses
Have the cause of electrical overload determined and repaired by your Lexus
dealer.

5
When trouble arises
333
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
● Engine oil pressure gauge continually points lower than normal
● Voltmeter continually points higher or lower 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
363
5-2. Steps to take in an emergency
If your vehicle overheats
If your engine overheatsStop 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.
If you do not see steam: Leave the engine running and carefully lift the hood.
Check to see if the cooling fan is operating.
If the fan is operating: Wait until the engine coolant temperature gauge 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
coolant level and inspect the
radiator core (radiator) for any
leaks.
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