engine LEXUS LX470 2006 Service Manual

EXTERIOR EQUIPMENT
93
FUEL TANK CAP
15x500
The arrow head next to as shown indicates on which
side of your vehicle the fuel filler door is located.
15X003a
1. To open the fuel filler door, pull the lever under the
instrument panel.
When refueling, turn off the engine.
CAUTION
 Do not smoke, cause sparks or allow open flames
when refuelling. The fumes are flammable.
 When opening the cap, do not remove the cap
quickly. In hot weather, fuel under pressure could
cause injury by spraying out of the filler neck if the
cap is suddenly removed.

AIR CONDITIONING
202
AUTOMATIC AIR CONDITIONING CONTROLS
20X017e
You can adjust the brightness of the display. See
“Instrument panel light control” on page 66 for details.
The automatic air conditioning automatically maintains
the set temperature.
This air conditioning features automatic fan speed and air flow
control which automatically se lects the most suitable fan
speed and air flow to control the temperature. The ignition key
must be in the “ON” position.NOTICE
To prevent the battery from being discharged, do not
leave the air conditioning on longer than necessary
when the engine is not running.

AIR CONDITIONING
213
REAR AIR CONDITIONINGCONTROLS
20X054b
The control panel is located in the roof panel above the
second seat.
1 Automatic control button
2 Air flow control buttons
3 OFF button
4 Temperature control lever
5 Fan speed control buttons
The automatic air conditioning automatically maintains the set
temperature.
This air conditioning features automatic fan speed and air flow
control which automatically se lects the most suitable fan
speed and air flow to control the temperature. The ignition key
must be in the “ON” position.
NOTICE
To prevent the battery from being discharged, do not
leave the air conditioning on longer than necessary
when the engine is not running.

AUDIO
220
Using your audio system: some basics
This section describes some of the basic features of the Lexus
audio system. Some informat ion may not pertain to your
system.
Your audio system works when the ignition key is in the “ACC”
or “ON” position.
NOTICE
To prevent the battery from being discharged, do not
leave the audio system on longer than necessary when
the engine is not running.
(a) Turning the system on and off
21X506b
Push this knob to turn the audio system on and off. Turn
this knob to adjust the volume.
The system turns on in the last mode used.
21X507a
Push “AM·SAT”, “FM”, “TAPE” or “DISC” to turn on that
mode. The selected mode turns on directly.
Push these buttons if you want to switch from one mode to
another.
If the tape or CD is not set, the cassette player or CD player
does not turn on.
You can turn off the cassette player by ejecting the cassette
tape. If the audio system was previously off, then the entire
audio system will be turned off when you eject the cassette
tape. If another function was previously playing, it will come on
again.

SECTION 3 – 1
253
STARTING AND DRIVING
Starting and driving
Three−way catalytic converters254
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Engine exhaust caution 255
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Before starting the engine 256
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Ignition switch 256
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. . . . . .
Parking brake 258
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. . . . . .
How to start the engine 258
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Automatic transmission 259
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Four−wheel drive system 266
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Rear view monitor system 269
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Lexus night view system 272
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Cruise control 275
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. . . . . .
Active height control suspension (AHC) 279
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Adaptive variable suspension (AVS) 287
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Active traction control system 288
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Vehicle stability control system 290
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Variable gear ratio steering system 293
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Brake system 295
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Brake pad wear limit indicators 299
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Tire pressure warning system 299
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STARTING AND DRIVING
254
THREEWAY CATALYTICCONVERTERS
31X001f
Threeway catalytic converters are emission control
devices installed in the exhaust system.
The purpose is to reduce pollutants in the exhaust gas.
CAUTION
Keep people and combustible materials away from
the exhaust pipe while the engine is running. The
exhaust gas is very hot.
 Do not drive, idle or park your vehicle over anything
that might burn easily such as grass, leaves, paper or
rags.
NOTICE
A large amount of unburned gases flowing into the
threeway catalytic converter may cause it to overheat
and create a fire hazard. To prevent this and other
damage, observe the following precautions:
 Use only unleaded gasoline.
 Do not drive with an extremely low fuel level; running
out of fuel could cause the engine to misfire, creating
an excessive load on the threeway catalytic
converter.
 Do not allow the engine to run at idle speed for more
than 20 minutes.
 Avoid racing the engine.
 Do not pushstart or pullstart your vehicle.
 Do not turn off the ignition while the vehicle is
moving.
 Keep your engine in good running order.
Malfunctions in the engine electrical system, electric
ignition system or fuel system could cause an
extremely high threeway catalytic converter
temperature.
 If the engine becomes difficult to start or stalls
frequently, take your vehicle in for a checkup as
soon as possible. Remember, your Lexus dealer
knows your vehicle and its threeway catalytic
converter system best.

STARTING AND DRIVING
255

To ensure that the threeway catalytic converter and
the entire emission control system operate properly,
your vehicle must receive the periodic inspections
required by the Lexus Maintenance Schedule. For
scheduled maintenance information, refer to the
“Owner’s Manual Supplement / Scheduled
Maintenance”.
ENGINE EXHAUST CAUTION
CAUTION
Avoid inhaling the engine exhaust. It contains
carbon monoxide, which is a colorless and odorless
gas. It can cause unconsciousness or even death.
 Make sure the exhaust system has no holes or loose
connections. The system should be checked from
time to time. If you hit something, or notice a change
in the sound of the exhaust, have the system checked
immediately.
 Do not run the engine in a garage or enclosed area
except for the time needed to drive the vehicle in or
out. The exhaust gases cannot escape, making this
a particularly dangerous situation.
 Do not remain for a long time in a parked vehicle with
the engine running. If it is unavoidable, however, do
so only in an unconfined area and adjust the heating
or cooling system to force outside air into the vehicle.
Keep the back door closed while driving. An open or
unsealed back door may cause exhaust gases to be
drawn into the vehicle.
 To allow proper operation of your vehicle’s
ventilation system, keep the inlet grilles in front of the
windshield clear of snow, leaves, or other
obstructions.
 If you smell exhaust fumes in the vehicle, open the
windows and close the back door to ensure plenty of
fresh air enters the vehicle. If you can smell exhaust
fumes even though there are no other vehicles in the
surrounding area, have your vehicle checked by your
Lexus dealer. Continued inhalation of exhaust fumes
can lead to death by gas poisoning.

STARTING AND DRIVING
256
BEFORE STARTING THE ENGINE
1. Check the area around the vehicle before entering it.
2. Adjust seat position, seatback angle, head restraint height
and steering wheel angle.
3. Adjust the inside and outside rear view mirrors.
4. Lock all doors.
5. Fasten seat belts.
Remember to check that the service reminder indicators
function when turning the key to “ON”, and check the fuel
gauge to see that you have sufficient fuel.
IGNITION SWITCH
31X002a
“START” Starter motor on. The key will return to the
“ON” position when released.
For starting tips, see page 258.
“ON” Engine on and all accessories on.
This is the normal driving position.
NOTICE
Do not leave the key in the “ON” position if the engine
is not running. The battery will discharge and the
electronic ignition system could be damaged.
“ACC” Accessories such as the radio operate, but the
engine is off.

STARTING AND DRIVING
257
If you leave the key in the “ACC” or “LOCK” position and open
the driver’s door, a buzzer will remind you to remove the key.
31X003a
“LOCK” Engine is off and the steering wheel is locked.
The ignition key can be removed only at this position.
To turn the key from “ACC” to the “LOCK” position, you must
put the transmission selector lever in the “P” position.
Once you remove the key, the engine immobilizer system is
automatically set. See “Engine immobilizer system” on page
11 .
When starting the engine, the key may seem stuck at the
“LOCK” position. To free it, first be sure the key is pushed all
the way in, and then rock the steering wheel slightly while
turning the key gently.
If, in an emergency, you must turn the engine off while the
vehicle is moving, turn the key only to “ACC”.
It is not a malfunction if the needles on all meters and gauges
move slightly when the key is turned to the “ACC”, “ON” or
“START” position.
Several hours after the engine is turned off, you may hear a
sound coming from underneath the luggage compartment for
several minutes. This is normal operation and does not
indicate a malfunction. (See page vii.)

STARTING AND DRIVING
258
PARKING BRAKE
31X065
1To set: Pull up the lever. For better holding power,
first depress the brake pedal and hold it while setting
the parking brake.
2 To release: Pull up the lever slightly (1), press the
lock release button (2), and lower the lever (3).
Before leaving your vehicle, firmly apply the parking brake. For
better holding power, first depress the brake pedal and hold it
while setting the parking brake.
CAUTION
Before driving, make sure the parking brake is fully
released and that the parking brake reminder light is off.
HOW TO START THE ENGINE
Cranking hold function
Once you turn the ignition key to “START” position and release
it, the cranking hold function continues to crank the engine in
“ON” position until it starts.
The function stops cranking the engine after about 25 seconds
maximum if the engine has not started yet. When you crank
the engine again, wait a few seconds and restart it.
If you hold the key in “START” position, the function will keep
cranking for about 30 seconds maximum.
Before cranking
1. Apply the parking brake firmly.
2. Turn off unnecessary lights and accessories.
3. Put the selector lever in “P”. If you need to restart the engine
while the vehicle is moving, put the selector lever in “N”. A
starter safety device will prevent the starter from operating if
the selector lever is in any drive position.
4. Depress the brake pedal and hold it to the floor until driving
off.