Page 553 of 612

5538-2. Steps to take in an emergency
8
When trouble arises
IS300h_EE(OM53C61E)
Add coolant if necessary.
Water can be used in an emergency
if coolant is unavailable.
Start the hybrid system and turn the air conditioning system on to check
that the radiator cooling fans operate and to check for coolant leaks from
the radiator or hoses.
The fans operate when the air conditioning system is turned on immediately after a
cold start. Confirm that the fans are operating by checking the fan sound and air
flow. If it is difficult to check these, turn the air conditioning system on and off
repeatedly.
(The fans may not operate in freezing temperatures.)
If the fans are not operating:
Stop the hybrid system immediately and contact any authorized Lexus
dealer or repairer, or another duly qualified and equipped professional.
If the fans are operating:
Have the vehicle inspected at the nearest authorized Lexus dealer or
repairer, or another duly qualified and equipped professional.
■If “Hybrid System Overheat” is shown on the multi-information display
Stop the vehicle in a safe place.
Stop the hybrid system and carefully lift the hood.
After the hybrid system has
cooled down, 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.
5
6
7
1
2
3
1
2
IS300h_EE_OM53C61E.book 553 ページ 2014年5月20日 火曜日 午後5時40分
Page 554 of 612
5548-2. Steps to take in an emergency
IS300h_EE(OM53C61E)
The coolant level is satisfactory if
it is between the “F” and “L” lines
on the reservoir.
Reservoir
“F”
“L”
Add coolant if necessary.
Water can be used in an emergency
if coolant is unavailable.
Start the hybrid system and check for the multi-information display.
If the message does not disappear:
Stop the hybrid system and contact any authorized Lexus dealer or
repairer, or another duly qualified and equipped professional.
If the message is not displayed:
Have the vehicle inspected at the nearest authorized Lexus dealer or
repairer, or another duly qualified and equipped professional.
4
1
2
3
5
6
IS300h_EE_OM53C61E.book 554 ページ 2014年5月20日 火曜日 午後5時40分
Page 555 of 612

5558-2. Steps to take in an emergency
8
When trouble arises
IS300h_EE(OM53C61E)
CAUTION
■When inspecting under the hood of your vehicle
Observe the following precautions.
Failure to do so may result in serious injury such as burns.
●If steam is seen coming from under the hood, do not open the hood until the steam
has subsided. The engine compartment may be very hot.
●After the hybrid system has been turned off, check that the “READY” indicator is off.
When the hybrid system operating, the gasoline engine may automatically start, or
the cooling fan may suddenly operate even if the gasoline engine stops. Do not touch
or approach rotating parts such as the belt and fan, which may lead to fingers or
clothing (especially a tie, a scarf or a muffler) getting caught, resulting in serious
injury.
NOTICE
■When adding engine/power control unit coolant
Add coolant slowly after the hybrid system has cooled down sufficiently. Adding cool
coolant to a hot hybrid system too quickly can cause damage to the hybrid system.
■To prevent damage to the cooling system
Observe the following precautions:
●Avoid contaminating the coolant with foreign matter (such as sand or dust etc.).
●Do not use any coolant additive.
●Do not loosen the coolant reservoir caps or
water filler cap while the hybrid system and
radiator are hot.
High temperature steam or coolant could
spray out.
IS300h_EE_OM53C61E.book 555 ページ 2014年5月20日 火曜日 午後5時40分
Page 563 of 612
![Lexus IS300h 2014 Owners Manual 563
9 9-1. Specifications
Vehicle specifications
IS300h_EE(OM53C61E)
■Oil capacity (Drain and refill [Reference*])
*: The engine oil capacity is a reference quantity to be used when changing the eng Lexus IS300h 2014 Owners Manual 563
9 9-1. Specifications
Vehicle specifications
IS300h_EE(OM53C61E)
■Oil capacity (Drain and refill [Reference*])
*: The engine oil capacity is a reference quantity to be used when changing the eng](/manual-img/36/30033/w960_30033-562.png)
563
9 9-1. Specifications
Vehicle specifications
IS300h_EE(OM53C61E)
■Oil capacity (Drain and refill [Reference*])
*: The engine oil capacity is a reference quantity to be used when changing the engine
oil. Warm up the engine and turn off the hybrid system, wait more than 5 minutes, and
check the oil level on the dipstick.
■Engine oil selection
“Toyota Genuine Motor Oil” is used in your Lexus vehicle. Lexus recom-
mends the use of approved “Toyota Genuine Motor Oil”. Another motor oil of
matching quality can also be used.
Oil grade:
0W-20, 5W-20, 5W-30 and 10W-30:
API grade SL “Energy-Conserving”, SM “Energy-Conserving” or SN
“Resource-Conserving”; or ILSAC multigrade engine oil
1 5 W- 4 0 a n d 2 0 W- 5 0 :
API grade SL, SM or SN multigrade engine oil
Recommended viscosity (SAE):
SAE 0W-20 is filled into your Lexus
vehicle at manufacturing, and the
best choice for good fuel economy
and good starting in cold weather.
If SAE 0W-20 oil is not available,
SAE 5W-30 oil may be used. How-
ever, it should be replaced with SAE
0W-20 at the next oil change.
If you use SAE 10W-30 or a higher
viscosity engine oil in extremely low
temperatures, the engine may
become difficult to start, so SAE
0 W-20, 5W-20 or 5W-30 engine
oil is recommended.
Lubrication system
With filter4.5 L (4.8 qt., 4.0 Imp. qt.)
Without filter4.1 L (4.3. qt., 3.6 Imp. qt.)
Temperature range anticipated
before next oil change.Preferred
IS300h_EE_OM53C61E.book 563 ページ 2014年5月20日 火曜日 午後5時40分
Page 575 of 612

575
9 9-2. Customization
Vehicle specifications
IS300h_EE(OM53C61E)
*1: For details about each function: →P. 1 1 7
*2: The default setting varies according to country.
*3:Except F SPORT models
*4: Some status screens cannot be registered (indicated on multi-information display).
*5: 2 of the following items: current fuel consumption, average fuel economy (after reset),
average fuel economy (after refuel), average fuel economy (after start), average vehi-
cle speed (after reset), average vehicle speed (after start), distance (driving range),
distance (after start), elapsed time (after reset), elapsed time (after start), blank.
*6:F SPORT models
*7: The customized setting varies according to country.
Drive information 2
Distance
(range)
*5—OO—Average speed
(after reset)
Pop-up displayONOFF—OO—
Accent color*3BlueRedOOO—
Tachometer settingsON (Self-
changing)
Hybrid System Indi-
cator (Always)
—OO—Tachometer
(Always)
Needle*6BlueRed—OO—White
Speed indicator*6OFF
50 to 200 km/h
(30 to 125 mph)
*7
—OO—50 to 160 km/h
(30 to 100 mph)*7
REV indicator*64000 r/min
2000 to 6000
r/m i n
—OO—
OFF
REV peak*6ONOFF—OO—
Function*1Default settingCustomized setting1234
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Page 576 of 612
5769-2. Customization
IS300h_EE(OM53C61E)
■Door lock (→P. 136, 143, 544)
■Smart entry & start system and wireless remote control (→P. 136, 143)
FunctionDefault settingCustomized setting
Unlocking using a mechani-
cal keyAll doors
unlocked in
one stepDriver's door
unlocked in one
step, all doors
unlocked in two
steps
———O
Speed-detecting automatic
door lock functionOnOffO—OO
Shifting gears to position
other than P locks all doorsOffOnO—OO
Shifting gears to P unlocks
all doorsOffOnO—OO
Opening driver's door
unlocks all doorsOnOffO—OO
Locking/unlocking of the
trunk when all doors are
locked/unlockedOnOff———O
1234
FunctionDefault settingCustomized setting
Operation signal
(Emergency flashers)OnOffO—OO
Time elapsed before auto-
matic door lock function is
activated if door is not
opened after being
unlocked
30 seconds
60 seconds
——OO120 seconds
Open door warning buzzerOnOff———O
1234
IS300h_EE_OM53C61E.book 576 ページ 2014年5月20日 火曜日 午後5時40分
Page 582 of 612

5829-2. Customization
IS300h_EE(OM53C61E)
■Vehicle customization
●When the speed-detecting automatic door lock and shift-linked automatic door lock
are both on, the door lock operates as follows.
• When shifting the shift lever to any position other than P, all the doors will be locked.
• If the vehicle is started with all doors locked, the speed-detecting automatic door
lock will not operate.
• If the vehicle is started with any door unlocked, the speed-detecting automatic door
lock will operate.
●When the smart entry & start system is off, the entry unlock function cannot be custom-
ized.
●When the doors remain closed after unlocking the doors and the timer activated auto-
matic door lock function activates, signals will be generated in accordance with the
operation buzzer volume and operational signal (Emergency flashers) function set-
tings.
■When customizing using the Remote Touch or Lexus Display Audio controller
Stop the vehicle in a safe place, apply the parking brake, and shift the shift lever to P. Also,
to prevent 12-volt battery discharge, leave the hybrid system operating while customiz-
ing the features.
CAUTION
■During customization
As the hybrid system needs to be operating during customization, ensure that the vehi-
cle is parked in a place with adequate ventilation. In a closed area such as a garage,
exhaust gases including harmful carbon monoxide (CO) may collect and enter the
vehicle. This may lead to death or a serious health hazard.
NOTICE
■During customization
To prevent 12-volt battery discharge, ensure that the hybrid system is operating while
customizing features.
IS300h_EE_OM53C61E.book 582 ページ 2014年5月20日 火曜日 午後5時40分
Page 587 of 612

587What to do if... (Troubleshooting)
IS300h_EE(OM53C61E)
●The function to prevent the electronic key from being left inside the trunk will
operate and you can open the trunk as usual. Take the key out from the trunk.
(→P. 1 4 6 )
●Did you press the power switch while firmly depressing the brake pedal?
(→P. 2 0 9 )
●Is the shift lever in P? (→P. 211)
●Is the electronic key anywhere detectable inside the vehicle? (→P. 1 4 9 )
●Is the steering wheel unlocked? (→P. 212)
●Is the electronic key battery weak or depleted?
In this case, the hybrid system can be started in a temporary way. (→P. 5 4 5 )
●Is the 12-volt battery discharged? (→P. 5 4 7 )
●Is the power switch in ON mode?
If you cannot release the shift lever by depressing the brake pedal with the
power switch in ON mode. (→P. 5 4 3 )
●It is locked automatically to prevent theft of the vehicle. (→P. 212) The trunk lid is closed with the electronic key left inside
If you think something is wrong
The hybrid system does not start
The shift lever cannot be shifted from P even if you depress the brake
pedal
The steering wheel cannot be turned after the hybrid system is stopped
IS300h_EE_OM53C61E.book 587 ページ 2014年5月20日 火曜日 午後5時40分