cooling Lexus IS220d 2012 Owner's Manual

400
4-3. Do-it-yourself maintenance
IS250/220d/200d_EE
CAUTION
The engine compartment contains many mechanisms and fluids that may
move suddenly, become hot, or become electrically energized. To avoid death
or serious injury, observe the following precautions.
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, 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.
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, see a doctor.
When working near the electric cooling fan 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 fan may automatically start to run if the air conditioning is
on and/or the coolant temperature is high. (P. 415)
CAUTION
Safety glasses
Wear safety glasses to prevent flying or falling material, fluid spray, etc.
from getting in the eyes.

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4-3. Do-it-yourself maintenance
4
Maintenance and care
IS250/220d/200d_EE
Engine compartment
IS250
*: For right-hand drive vehicles:
They are located on the opposite side of the engine compartment.
Battery (P. 415)
Engine oil level dipstick
(P. 409)
Engine oil filler cap
(P. 410)
Fuse boxes (P. 438)
Washer fluid tank(P. 420)Electric cooling fans
Condenser (P. 415)
Radiator (P. 415)
Engine coolant reservoir
(P. 413)
*
*

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4-3. Do-it-yourself maintenance
IS250/220d/200d_EE
IS220d and IS200d
*: For right-hand drive vehicles:
They are located on the opposite side of the engine compartment.
Battery (P. 415)
Engine oil level dipstick
(P. 409)
Engine oil filler cap
(P. 410)
Fuse boxes (P. 438)
Washer fluid tank(P. 420)Electric cooling fans
Condenser (P. 415)
Intercooler (P. 415)
Radiator (P. 415)
Engine coolant reservoir
(P. 413)
*
*

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4-3. Do-it-yourself maintenance
IS250/220d/200d_EE
If the coolant level drops within a short time after replenishing
Visually check the radiator, hoses, engine coolant filler cap, 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 system.
Coolant selection
Only use “Toyota Super Long Life Coolant” or similar high-quality eth-
ylene glycol-based non-silicate, non-amine, non-nitrite, and non-borate
coolant with long-life hybrid organic acid technology.
“Toyota Super Long Life Coolant” is a mixture of 50% coolant and 50%
deionized water. (Enabled: -35C [-31F])
For more details about engine coolant, contact any authorized Lexus dealer
or repairer, or another duly qualified and equipped professional.
CAUTION
When the engine is hot
Do not remove the radiator cap (IS250), or the coolant reservoir cap (IS220d
and IS200d).
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.

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4-3. Do-it-yourself maintenance
4
Maintenance and care
IS250/220d/200d_EE
7MPX-B10 A
Headlights, front fog lights, front
position lights, license plate lights,
windshield washer, horn, power
door lock system, power windows,
power seats, electric tilt and tele-
scopic steering column, meter,
smart entry & start system, outside
rear view mirrors, air conditioning
system, multiplex communication
system
8DOME10 AInterior lights, meter, outer foot
lights
9CDS10 AElectric cooling fans
10E/G-B60 AFR CTRL-B, ETCS, A/F, STR
LOCK, EDU, ECD
11DIESEL GLW80 AEngine glow system
12ABS150 AVDIM
13RH J/B-B30 AFR DOOR RH, RR DOOR RH,
AM2
14MAIN30 AH-LP L LWR, H-LP R LWR
15STARTER30 ASmart entry & start system
16LH J/B-B30 AFR DOOR LH, RR DOOR LH,
SECURITY
17P/I-B60 AEFI, F/PMP, INJ
18EPS80 APower steering
FuseAmpereCircuit

444
4-3. Do-it-yourself maintenance
IS250/220d/200d_EE
19ALT150 A
LH J/B-AM, E/G-AM, GLW
PLG2, HEATER, FAN1, FAN2,
DEFOG, ABS2, RH J/B-AM,
GLW PLG1,
LH JB-B, RH J/B-B
20GLW PLG150 APTC heater
21RH J/B-AM80 A
OBD, STOP SW, TI&TE, FR P/
SEAT RH, RAD NO.3, ECU-IG
RH,
RH-IG, FR S/HTR RH, ACC, CIG,
PWR OUTLET, DOOR DL
22ABS230 AVDIM
23DEFOG50 ARear window defogger
24FA N 240 AElectric cooling fans
25FA N 140 AAir conditioning system
26HEATER50 AAir conditioning system
27GLW PLG250 APTC heater
28E/G-AM60 AH-LP CLN, FR CTRL-AM,
DEICER, A/C COMP
29LH J/B-AM80 A
S/ROOF, FR P/SEAT LH, TV
NO.1,
A/C, FUEL OPEN, PSB, RR FOG,
FR WIP, H-LP LVL, LH-IG,
ECU-IG LH, PANEL, TAIL, TV
NO.2, MIR HTR, FR S/HTR LH
FuseAmpereCircuit

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4-3. Do-it-yourself maintenance
4
Maintenance and care
IS250/220d/200d_EE
15FR DOOR LH20 APower windows, outside rear view
mirror
16SECURITY7.5 ASmart entry & start system
17H-LP LVL7.5 AAutomatic headlight leveling sys-
tem
18LH-IG10 A
Charging system, headlight
cleaner, rear window defogger,
electric cooling fans, emergency
flashers, turn signal lights, back-up
lights, stop lights, outside rear
view mirror defoggers, seat belts,
Lexus parking assist-sensor, cruise
control, PTC heater, rear sunshade,
exhaust system
19FR WIP30 AWindshield wipers
FuseAmpereCircuit

5
527
5-2. Steps to take in an emergency
When trouble arises
IS250/220d/200d_EE
CAUTION
Battery precautions
The battery contains poisonous and corrosive acidic electrolyte, while
related parts contain lead and lead compounds. Observe the following pre-
cautions when handling 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, cloth-
ing or the vehicle body.
Do not lean over the battery.
In the event that battery fluid comes into contact with the skin or eyes,
immediately 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
To prevent damaging the vehicle
Do not pull- or push-start the vehicle, because the three-way catalytic con-
verter (IS250), catalytic converter and DPNR (Diesel Particulate-NOx
Reduction System) catalytic converter (IS220d) or catalytic converter and
DPF (Diesel Particulate Filter System) catalytic converter (IS200d) may
overheat and become a fire hazard.
When handling jumper cables
Be careful that the jumper cables do not become tangled in the cooling fan
or any of the belts when connecting or disconnecting them.

528
5-2. Steps to take in an emergency
IS250/220d/200d_EE
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. Carefully lift the hood after the steam
subsides and then restart the engine.
If you do not see steam:
Leave the engine running and carefully lift the hood.
Check to see if the cooling fans are operating.
If the fans are operating:
Wait until the temperature of the engine (shown on the
instrument cluster) begins to fall and then stop the
engine.
If the fans are not operating:
Stop the engine and call any authorized Lexus dealer
or repairer, or another duly qualified and equipped pro-
fessional.
After the engine has cooled
down sufficiently, check the
engine coolant level and
inspect the radiator core
(radiator) for any leaks.
If the engine compartment
cover needs to be removed:
STEP1
STEP2
STEP3
STEP4

544
6-1. Specifications
IS250/220d/200d_EE
Cooling system
Ignition system (IS250 only)
Capacity
IS250
10.3 L (10.9 qt., 9.1 Imp. qt.)
IS220d (without power heater)
8.8 L (9.3 qt., 7.7 Imp. qt.)
IS200d (without power heater)
8.7 L (9.2 qt., 7.7 Imp. qt.)
IS220d and IS200d (with power heater)
9.0 L (9.5 qt., 7.9 Imp. qt.)
Coolant type
Use either of the following.
• “Toyota Super Long Life Coolant”
• Similar high-quality ethylene glycol-based
non-silicate, non-amine, non-nitrite, and non-
borate coolant with long-life hybrid organic
acid technology
Do not use plain water alone.
Spark plug
Make
GapDENSO FK20HBR11
1.1 mm (0.043 in.)
NOTICE
Iridium-tipped spark plugs
Use only iridium-tipped spark plugs. Do not adjust gap when tuning the
engine.