air condition Lexus GX470 2006 Basic Functions In Frequent Use / LEXUS 2006 GX470 (OM60B99U) Workshop Manual

ENGINE
509
FACTS ABOUT ENGINE OILCONSUMPTION
Functions of engine oil
Engine oil has the primary function of lubricating and cooling
the inside of the engine, and plays a major role in maintaining
the engine in proper working order.
Engine oil consumption
It is normal that an engine should consume some engine
oil during normal engine operation. The causes of oil
consumption in a normal engine are as follows.
Oil is used to lubricate pistons, piston rings and cylinders.
A thin film of oil is left on the cylinder wall when a piston
moves downwards in the cylinder. High negative pressure
generated when the vehicle is decelerating sucks some of
this oil into the combustion chamber. This oil as well as
some part of the oil film left on the cylinder wall is burned by
the high temperature combustion gases during the
combustion process.
 Oil is also used to lubricate the stems of the intake valves.
Some of this oil is sucked into the combustion chamber
together with the intake air and is burned along with the fuel.
High temperature exhaust gases also burn the oil used to
lubricate the exhaust valve stems. The amount of engine oil consumed depends on the
viscosity of the oil, the quality of the oil and the way the
vehicle is driven.
More oil is consumed by high
−speed driving and frequent
acceleration and deceleration.
A new engine consumes more oil, since its pistons, piston rings
and cylinder walls have not become conditioned.
Oil consumption: Max. 1.0 L per 1000 km (1.1 qt./600 miles,
0.9 Imp. qt./600 miles)
When judging the amount of oil consumption, keep in
mind that the oil may have become diluted, making it
difficult to judge the true level accurately.
For example, if a vehicle is used for repeated short trips and
consumes a normal amount of oil, the dipstick may not show
any drop in the oil level at all, even after 1000 km (600 miles)
or more. This is because the oil is gradually becoming diluted
with fuel or moisture, making it appear that the oil level has not
changed.
The diluting ingredients evaporate out when the vehicle is then
driven at high speeds, as on an expressway, making it appear
that oil is excessively consumed after driving at high speeds.

CHASSIS
533
Glossary of tire terminology
Tire related termMeaning
Accessory weightthe combined weight (in excess of those standard items which may be rep\
laced)
of automatic transmission, 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
pressuretire inflation pressure when the vehicle has been parked for at least 3 \
hours or
more, or it has not been driven more than 1.5 km or 1 mile under that co\
ndition
Curb weightthe weight of a motor vehicle with standard equipment including the maxi\
mum
capacity of fuel, oil, and coolant, and, if so equipped, air conditionin\
g and
additional weight optional engine
Intended outboard
sidewall(a) the sidewall that contains a whitewall, bears white lettering or bearsmanufacturer, brand, and/or model name molding that is higher or deeper
than the same molding on the other sidewall of the tire, or
(b) the outward facing sidewall of an asymmetrical tire that has a particula\
r side that must always face outward when mounted on a vehicle
Maximum inflation
pressurethe maximum cold inflation pressure to which a tire may be inflated and \
it is
shown on the sidewall of the tire
Maximum loaded
vehicle weightthe sum of —
(a) curb weight;
(b) accessory weight;
(c) vehicle capacity weight; and
(d) production options weight

ELECTRICAL COMPONENTS
547
Driver’s side instrument panel
No.FUSEAMPERECIRCUIT
1SPARE10Spare fuse
2ALT140
Charging system and all
components in “AM1”,
“HEATER”, “CDS FAN”, “FR
FOG”, “DEFOG”, “AIR SUS”,
“AC INV”, “SEAT HEATER”,
“OBD”, “STOP”, “J/B”, “RR AC”,
“MIR HEATER”, “BATT CHG”,
“TOWING BRK” and “TOWING”
fuses
3SPARE15Spare fuse
4HEATER50Air conditioning system
5AIR
SUS50Rear height control air
suspension
6AM150
All components in “ACC”, “CIG”,
“IG1”, “FR WIP −WSH”, “RR
WIP”, “RR WSH”, “DIFF”,
“ECU− IG”, “TEMS” and “STA”
fuses
7TOWING
BRK30Trailer brake controller
8J/B50
All components in “P FR P/W”,
“P RR P/W”, “D RR P/W”, “D
P/SEAT”, “P P/SEAT”, “TAIL”,
“PANEL” and “POWER OR
TI&TE” fuses
9BATTCHG30Trailer sub battery
10TOWING40Trailer lights

ELECTRICAL COMPONENTS
548
No.FUSEAMPERECIRCUIT
11CDS FAN20Electric cooling fan
12RR A/C30Rear air conditioning system
13MIR
HEATER10Outside rear view mirror
defogger
14STOP10
Stop lights, high m ounted
stoplight, shift lock control
system, vehicle stability control
system, electronic m odulated
suspension, rear height control
air suspension, multiport fuel
injection system/sequential
multiport fuel injection system
15AC INV15Power outlet (115 VAC)
16FR FOG15Front fog lights
17OBD7.5On −board diagnosis system
18HEAD
(LO RH)10Right− hand headlight (low beam)
19HEAD
(LO LH)10Left− hand headlight (low beam)
No.FUSEAMPERECIRCUIT
20HEAD
(HI RH)10Right− hand headlight (high
beam)
21HEAD
(HI LH)10Left− hand headlight (high beam)
22EFI NO.210Multiport fuel injection
system/sequential multiport fuel
injection system
23HEATER
NO.27.5Air conditioning system
24DEFOG30Rear window defogger
25AIRSUSNO.210Rear height control air
suspension
26SEAT
HEATER20Seat heaters
27DOME10
Ignition switch light, interior
lights, personal lights, foot
lights, running board lights,
door courtesy lights, inside
door handle lights,
multi −information display
28RADIO
NO.120Audio system, navigation
system

ELECTRICAL COMPONENTS
549
No.FUSEAMPERECIRCUIT
29ECUB10
Multiplex communication
system, vehicle stability control
system, wireless remote
control system, inside rear
view mirror, air conditioning
system, electronic modulated
suspension, driving position
memory system, power
windows, moon roof, rear view
monitor system
30ECUBNO.210Theft deterrent system
31ABS
MTR40
Anti −lock brake system,
vehicle stability control system,
active traction control system,
brake assist system
32AM230Starting system, all components
in “IGN”, “SRS”, “GAUGE” and
“ST2” fuses
33ABS
SOL30
Anti −lock brake system,
vehicle stability control system,
active traction control system,
brake assist system
No.FUSEAMPERECIRCUIT
34ALTS7.5Charging system
35MAYDAY7.5Lexus Link System
36HORN10Horns
37A/F
HEATER15A/F sensor
38TRNHAZ15Turn signal lights
39ETCS10Electronic throttle control system
40EFI20Multiport fuel injection
system/sequential multiport fuel
injection system
41D FR P/W20Power window
42DR/LCK25Power door lock
43TOWING30Towing converter
44RADIO NO.230Audio system, navigation
system
45A/PUMP50Multiport fuel injection
system/sequential multiport fuel
injection system
46IGN10
Multiport fuel injection
system/sequential multiport fuel
injection system, vehicle
stability control system

ELECTRICAL COMPONENTS
550
No.FUSEAMPERECIRCUIT
47SRS10SRS airbag system, front
passenger occupant
classification system
48GAUGE7.5Gauges and meters
49ST27.5Multiport fuel injection
system/sequential multiport fuel
injection system
50FR
WIPWSH30Windshield wipers, windshield
washer
51TEMS20Electronic modulated
suspension
52DIFF20Four−wheel drive system
53RR WIP15Rear window wiper
54D P/SEAT30Driver’s power seat
55P P/SEAT30Front passenger’s power seat
56PWR
OUTLET15Power outlet (12 VDC)
57IG1 NO.210Rear air conditioning system,
inside rear view mirror, kinetic
dynamic suspension system
58RR WSH15Rear window washer
No.FUSEAMPERECIRCUIT
59ECUIG10
Shift lock control system, power
windows, outside rear view
mirror defogger, anti −lock brake
system, active traction control
system, vehicle stability control
system, air conditioning system,
navigation system, power
windows, moon roof, tilt and
telescopic steering,
multi −information display,
driving position memory
system, rear view monitor
system, tire pressure warning
system
60IG110
Air conditioning system, back −up
lights, rear window defogger,
seat heaters, vehicle stability
control system
61STA7.5Multiport fuel injection
system/sequential multiport fuel
injection system
62P FR P/W20Front passenger’s power window
63P RR P/W20Rear right side power window

BODY
566
PROTECTING YOUR VEHICLEFROM CORROSION
Proper care of your Lexus can help ensure long −term
corrosion prevention.
The most common causes of corrosion to your vehicle
are:
 The accumulation of road salt, dirt and moisture in
hard−to−reach areas under the vehicle.
 Chipping of paint or undercoating caused by minor
accidents or by stones and gravel.
The following conditions will cause or accelerate
corrosion of your vehicle, so it is important to keep your
vehicle, particularly the underside, as clean as possible
and to repair any damage to paint or protective coatings
as soon as possible.
 The presence of road salt or dust control chemicals, salt in
the air near the sea coast, industrial air pollution.
 High humidity, especially at temperatures just above
freezing point.
 Certain parts of your vehicle are wet or damp for an
extended period of time, even though other parts of the
vehicle are dry.
 Components of the vehicle which are prevented from
quick−drying due to lack of proper ventilation are exposed
to high ambient temperature. To help prevent corrosion on your Lexus, follow these
guidelines:
Keep your vehicle clean by regular washing.
In addition,
observe the following points.
 If you drive on salted roads in the winter or if you live near
the ocean, you should hose off the undercarriage at least
once a month to minimize corrosion.
 High pressure water or steam is effective for cleaning the
vehicle’s underside and wheel housings. Pay particular
attention to these areas as it is difficult to see all the mud and
dirt. It will do more harm than good to simply wet the mud
and debris without removing. The lower edge of doors,
rocker panels and frame members have drain holes which
should not be allowed to clog with dirt as trapped water in
these areas can cause corrosion.
 Wash the underside of the vehicle thoroughly when winter
is over.
See “Washing and waxing” on page 567 for more tips.
Check the condition of your vehicle’ s paint and trim. If you
find any chips or scratches in the paint, touch them up
immediately to prevent corrosion from starting. If the chips or
scratches have gone through the bare metal, have a qualified
body shop make the repair.

BODY
572
Air Conditioning Control Panel, Audio Panel,
Instrument Panel, Console Panel and
Switches
Use a soft damp cloth for cleaning.
Soak a clean soft cloth in water or lukewarm water then lightly
wipe off any dirt.
NOTICE
 Do not use organic substances (solvents, kerosene,
alcohol, gasoline, etc.) or alkaline or acidic solutions.
These chemicals can cause discoloring, staining or
peeling of the surface.
 If you use cleaners or polishing agents, make sure
their ingredients do not include the substances
mentioned above.
 If you use a liquid car freshener , do not spill the liquid
onto the vehicle’s interior surfaces. It may contain
the ingredients ment ioned above. Immediately clean
any spill using the method mentioned above.
If you have any questions about the cleaning of your
Lexus, your local Lexus dealer will be pleased to answer
them.
RAIN CLEARING MIRRORS
The rear view mirrors have been coated to produce a “rain
clearing” effect. This coating causes the raindrops to
spread, clearing the driver’s rear view when it rains.
It is sufficient to wash the mirrors with water for day to day care.
The rain clearing effect is reduced in drizzle and light rain.
In the following cases, the rain clearing effect will be reduced
temporarily, but will gradually recover.
 After wiping dirt off the mirrors
 When the mirrors fog up
 After waxing your vehicle in an automatic car wash
 After your vehicle has been parked for a long period in
underground parking lots, etc. where there is no direct
sunlight.
If you would like to restore the rain clearing effect to its normal
level immediately in the above cases, wash the mirrors with
neutral detergent, then rinse thoroughly.