cooling LEXUS RX270 2014 Owners Manual

314
RX350/270_EE
3-1. Using the air conditioning system and defogger
Automatic air conditioning system
Air outlets and fan speed are automatically adjusted according to the tem-
perature setting.
Vehicles with a navigation system
Owners of models equipped with a navigation system should refer to
the “Navigation System Owner’s Manual”.
Vehicles without a navigation system
Automatic
mode button Driver’s side temperature
display
Air outlet selector button
Fan speed
control button
Air outlet displayFan speed display
Passenger’s side
temperature display
Driver's side temperature
control buttons
Cooling and dehumidification
function on/off button
Outside/recirculated air mode button Windshield defogger
buttonPassenger’s side temperature
control buttonsDual mode
button
“OFF”
button
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319
3-1. Using the air conditioning system and defogger
3
Interior features
RX350/270_EE
■Air conditioning system settings
●When the “ENGINE START STOP” switch is turned on, the air conditioning
system settings will be set to those that were in use the last time the “ENGINE
START STOP” switch was turned off.
●Air conditioning system settings are memorized individually on each electronic
key, so the settings reproduced will be specific to the key that is used.
●This feature is customizable at any authorized Lexus dealer or repairer, or
another duly qualified and equipped professional.
■Using automatic mode
Fan speed is adjusted automatically according to the temperature setting and ambi-
ent conditions. As a result, the following may occur:
Immediately after the button is pressed, the fan may stop for a while until warm or
cool air is ready to flow.
■Using the system in recirculated air mode
The windows will fog up more easily if recirculated air mode is used for an extended
period.
■Switching between outside air and recirculated air modes
Recirculated air mode or outside air mode may be automatically switched in accor-
dance with the temperature setting and the inside temperature.
■Window defogger feature
Recirculated air mode may automatically switch to outside air mode in situations
where the windows need to be defogged.
■When outside air temperature is below 0°C (32°F)
The cooling and dehumidification function may not operate even when is
pressed.
■When the indicator light on goes off
Press to turn on the cooling and dehumidification function again. There may
be a problem in the air conditioning system if the indicator light goes off again
shortly after the button is pressed. Have it inspected by any authorized Lexus
dealer or repairer, or another duly qualified and equipped professional.
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463
4-3. Do-it-yourself maintenance
4
Maintenance and care
RX350/270_EE
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,
observe the following precaution:
■When working on the engine compartment
●Keep hands, clothing and tools away from the moving fans and engine drive belt.
●Be careful not to touch the engine, radiator, exhaust manifold, etc. right after driv-
ing as they may be hot. Oil and other fluids may also be hot.
●Do not leave anything that may burn easily, such as paper and 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.
●Take care because brake fluid can harm your hands or eyes and damage painted
surfaces.
If fluid gets on your hands or in your eyes, flush the affected area with clean water
immediately.
If you still experience discomfort, consult a doctor.
■When working near the electric cooling fans or radiator grille
Be sure the “ENGINE START STOP” switch is off.
With the “ENGINE START STOP” switch in IGNITION ON mode, the electric
cooling fans may automatically start to run if the air conditioning is on and/or the
coolant temperature is high. (→P. 4 7 8 )
■Safety glasses
Wear safety glasses to prevent flying or falling material, fluid spray, etc. from getting
in your eyes
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468
4-3. Do-it-yourself maintenance
RX350/270_EE
Engine compartment
RX270
Engine oil filler cap
(→P. 4 74 )
Engine oil level dipstick
(→P. 4 7 2 )
Battery (→P. 4 7 9 )
Fuse box (→P. 504)Engine coolant reservoir
(→P. 477)
Condenser (→P. 4 7 8 )
Radiator (→P. 4 7 8 )
Electric cooling fans
Washer fluid tank (→P. 4 8 2 )
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469
4-3. Do-it-yourself maintenance
4
Maintenance and care
RX350/270_EE
RX350
Engine oil filler cap
(→P. 4 74 )
Engine oil level dipstick
(→P. 4 7 2 )
Battery (→P. 4 7 9 )
Fuse box (→P. 504)Engine coolant reservoir
(→P. 477)
Condenser (→P. 4 7 8 )
Radiator (→P. 4 7 8 )
Electric cooling fans
Washer fluid tank (→P. 4 8 2 )
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478
4-3. Do-it-yourself maintenance
RX350/270_EE
Radiator and condenser
Check the radiator and condenser and clear away any foreign objects.
If any of the above parts are extremely dirty or you are not sure of their
condition, have your vehicle checked by any authorized Lexus dealer or
repairer, or another duly qualified and equipped professional.
■If the coolant level drops within a short time after replenishing
Visually check the radiator, hoses, radiator cap, drain cock and water pump.
If you cannot find a leak, have any authorized Lexus dealer or repairer, or another
duly qualified and equipped professional, test the cap and check for leaks in the
cooling systems.
CAUTION
■When the engine is hot
Do not remove the radiator cap.
The cooling system may be under pressure and may spray hot coolant if the cap is
removed, causing serious injuries, such as burns.
NOTICE
■When adding engine coolant
Coolant is neither plain water nor straight antifreeze. The correct mixture of water
and antifreeze must be used to provide proper lubrication, corrosion protection
and cooling. Be sure to read the antifreeze or coolant label.
■If you spill coolant
Be sure to wash it off with water to prevent damage to parts or paint.
CAUTION
■When the engine is hot
Do not touch the radiator or condenser as they may be hot and cause serious inju-
ries, such as burns.
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507
4-3. Do-it-yourself maintenance
4
Maintenance and care
RX350/270_EE
Fuse layout and amperage ratings
■Engine compartment
FuseAmpereCircuit
1RDI FAN NO. 180 AElectric cooling fans
2RR DEF50 ARear window defogger
3AIR SUS50 AElectronically modulated air suspen-
sion
4HEATER50 AAir conditioning system
5SPARE30 A
6SPARE40 A
7ABS NO. 230 AVehicle stability control
8H-LP CLN30 AHeadlight cleaner
9PBD30 APower back door
10ST30 AStarter system
11PD50 A
A/F, H-LP RH HI, H-LP LH LO, H-LP
RH LO, H-LP LH HI, HORN, S-
HORN, EFI MAIN NO. 2
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510
4-3. Do-it-yourself maintenance
RX350/270_EE
35A/F*110 A
Multiport fuel injection system/
sequential multiport fuel injection sys-
tem
WIP-S*27. 5 ACruise control
36ECU-IG1 NO. 410 A
Adaptive front-lighting system, air
conditioning system, rear window
defogger, vehicle stability control sys-
tem, electric cooling fans
37BK/UP LP7. 5 ABack-up lights
38ECU-IG1 NO. 515 AAir conditioning system
39ECU-IG1 NO. 610 A
Adaptive front-lighting system, head
light cleaner, cruise control, electroni-
cally modulated air suspension, vehi-
cle stability control, air conditioning
system
40EFI NO. 210 A
Multiport fuel injection system/
sequential multiport fuel injection sys-
tem
41F/ P M P*215 A
Multiport fuel injection system/
sequential multiport fuel injection sys-
tem
42DEICER25 AWindshield wipers and washer
43STOP7. 5 A
Vehicle stability control, vehicle
dynamics integrated management,
stop lights, electronic controlled
transmission, multiport fuel injection
system/sequential multiport fuel injec-
tion system, shift lock control system,
starter system
44TOW IN G BAT T20 ATr a i l e r b a t t e r y
FuseAmpereCircuit
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5
597
5-2. Steps to take in an emergency
When trouble arises
RX350/270_EE
CAUTION
■Avoiding battery fires or explosions
Observe the following precautions to prevent accidentally igniting the flammable
gas that may be emitted from the battery:
●Make sure each jumper cable is connected to the correct terminal and that it is
not unintentionally in contact with any other than the intended terminal.
●Do not allow the + and - clamps of the jumper cables to come into contact with
each other.
●Do not smoke, use matches, cigarette lighters or allow open flame near the bat-
tery.
■Battery precautions
The battery contains poisonous and corrosive acidic electrolyte, while related parts
contain lead and lead compounds. Observe the following precautions when han-
dling the battery:
●When working with the battery, always wear safety glasses and take care not to
allow any battery fluids (acid) to come into contact with skin, clothing or the vehi-
cle body.
●Do not lean over the battery.
●In the event that battery fluid comes into contact with the skin or eyes, immedi-
ately wash the affected area with water and seek medical attention.
Place a wet sponge or cloth over the affected area until medical attention can be
received.
●Always wash your hands after handling the battery support, terminals, and other
battery-related parts.
●Do not allow children near the battery.
NOTICE
■When handling jumper cables
When connecting the jumper cables, ensure that they do not become entangled in
the cooling fans or belt.
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598
5-2. Steps to take in an emergency
RX350/270_EE
If your vehicle overheats
Correction procedures
Stop the vehicle in a safe place and turn off the air conditioning
system, and then stop the engine.
If you see steam:
Carefully lift the hood after the steam subsides.
If you do not see steam:
Carefully lift the hood.
After the engine has cooled down
sufficiently, inspect the hoses and
radiator core (radiator) for any
leaks.
Radiator
Cooling fans
If a large amount of coolant leaks,
immediately contact any autho-
rized Lexus dealer or repairer, or
another duly qualified and
equipped professional.
The coolant level is satisfactory if it
is between the “FULL” and “LOW”
lines on the reservoir.
Reservoir
“FULL” line
“LOW” line
“Radiator cap
The following may indicate that your vehicle is overheating.
●“ENGINE OVERHEAT” is shown on the multi-information display.
●Steam comes out from under the hood.
STEP1
STEP2
STEP3
STEP4
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