Page 522 of 648
5228-2. Steps to take in an emergency
IS350/300/200t_U (OM53D76U)
Master warning light
The master warning light also comes on or flashes in order to indicate that a
message is currently being displaye d on the multi-information display.
Multi-information display
If any of the warning lights come on again after the following actions have been
performed, contact your Lexus dealer.
If a warning message is displayed
If a warning is shown on the multi-info rmation display, stay calm and perform
the following actions:
Except F SPORT modelsF SPORT models (when the main
meter is in the center position)
F SPORT models (when the main
meter is in the right-side position)
1
2
Page 534 of 648
5348-2. Steps to take in an emergency
IS350/300/200t_U (OM53D76U)
Indicates that the engine switch is turned off or turned to
ACCESSORY mode and the driver’s door is opened
while the lights are turned onA buzzer also sounds.
→ Turn the lights off.
(If equipped)
Indicates that the moon roof is not fully closed (with the
engine switch off, and the driver’s door open)
A buzzer also sounds.
→ Close the moon roof.
Indicates that the windows are not fully closed (with the
engine switch off, and the driver’s door open)
A buzzer also sounds.
→ Close all the windows.
(If equipped)
Indicates that the windows and the moon roof are not
fully closed (with the engine switch off, and the driver’s
door open)
A buzzer also sounds.
→ Close all the windows and the moon roof.
Warning messageDetails/Actions
(Flashes)
(Flashes)
(Flashes)
(Flashes)
Page 538 of 648

5388-2. Steps to take in an emergency
IS350/300/200t_U (OM53D76U)
(If equipped)
Indicates that the engine oil is scheduled to be changed.
(The indicator will not work properly unless the message
has been reset.)
→Check the engine oil, and change if necessary.
After changing the engine oil, the message should
be reset.
(If equipped)
Indicates that all maintenance according to the driven
distance on the maintenance schedule* should be per-
formed soon.
→ Comes on approximately 4500 miles (7200 km)
after the message has been reset.
If necessary, perform maintenance. Please reset
the message after the maintenance is performed.
(→ P. 454)
(If equipped)
Indicates that the engine oil should be changed. (After
the engine oil is changed and the message has been
reset.)
→ Check and change the engine oil, and oil filter by
your Lexus dealer. After chan ging the engine oil, the
message should be reset. ( →P. 468)
(If equipped)
Indicates that all maintenanc e is required to correspond
to the driven distance on the maintenance schedule
*.
→ Comes on approximately 5000 miles (8000 km)
after the message has been reset. (The indicator will
not work properly unless the message has been
reset.)
Perform the necessary maintenance. Please reset
the message after the maintenance is performed.
(→ P. 454)
Indicates that the Automatic High Beam switch is
pressed while the headlights are in low beam.
→ Turn the high beam on and press the Automatic
High Beam switch again.
Warning messageDetails/Actions
Page 557 of 648

5578-2. Steps to take in an emergency
8
When trouble arises
IS350/300/200t_U (OM53D76U)
One of the following may be the cause of the problem:
●There may not be sufficient fuel in the vehicle’s tank.
Refuel the vehicle.
●The engine may be flooded.
Try to restart the engine again following correct starting procedures.
(→ P. 172)
●There may be a malfunction in th e engine immobilizer system. (→P. 68)
One of the following may be the cause of the problem:
●The battery terminal connections may be loose or corroded.
●The battery may be discharged. ( →P. 562)
The engine starting system may be malfun ctioning due to an electrical problem
such as electronic key battery depletio n or a blown fuse. However, an interim
measure is available to start the engine. ( →P. 558)
If the engine will not start
If the engine will not start even though correct starting procedures are being
followed ( →P. 172), consider each of the following points:
The engine will not start even thoug h the starter motor operates nor-
mally.
The starter motor turns over slowly , the interior lights and headlights
are dim, or the horn does not sound or sounds at a low volume.
The starter motor does not turn over
Page 558 of 648

5588-2. Steps to take in an emergency
IS350/300/200t_U (OM53D76U)
One of the following may be the cause of the problem:
●One or both of the battery terminals may be disconnected.
●The battery may be discharged. (→P. 562)
●There may be a malfunction in the steering lock system.
Contact your Lexus dealer if the problem cannot be repaired, or if repair procedures
are unknown.
When the engine does not start, the follo wing steps can be used as an interim
measure to start the engine if the engine switch is functioning normally:
Set the parking brake.
Shift the shift lever to P.
Turn the engine switch to ACCESSORY mode.
Press and hold the engine switch for about 15 seconds while depressing the
brake pedal firmly.
Even if the engine can be started using the above steps, the system may be mal-
functioning. Have the vehicle in spected by your Lexus dealer.
The starter motor does not turn over, the interior lights and headlights
do not turn on, or the horn does not sound.
Emergency start function
1
2
3
4
Page 564 of 648

5648-2. Steps to take in an emergency
IS350/300/200t_U (OM53D76U)
■Starting the engine when the battery is discharged
The engine cannot be started by push-starting.
■To prevent battery discharge
●Turn off the headlights and the audio system while the engine is off.
●Turn off any unnecessary electrical components when the vehicle is running at a low
speed for an extended period, such as in heavy traffic.
■Charging the battery
The electricity stored in the battery will disc harge gradually even when the vehicle is not
in use, due to natural discharge and the draini ng effects of certain electrical appliances. If
the vehicle is left for a long time, the battery may discharge, and the engine may be
unable to start. (The battery recharges automatically during driving.)
■When recharging or replacing the battery
●In some cases, it may not be possible to un lock the doors using the smart access system
with push-button start when the battery is discharged. Use the wireless remote control
or the mechanical key to lock or unlock the doors.
●The engine may not start on the first attempt after the battery has recharged but will
start normally after the second attempt. This is not a malfunction.
●The engine switch mode is memorized by the vehicle. When the battery is recon-
nected, the system will return to the mode it was in before the battery was discharged.
Before disconnecting the battery, turn the engine switch off.
If you are unsure what mode the engine switch was in before the battery discharged, be
especially careful when reconnecting the battery.
Page 581 of 648
5819-1. Specifications
9
Vehicle specifications
IS350/300/200t_U (OM53D76U)
Cooling system
Capacity
IS350/IS300 10.1 qt. (9.6 L, 8.4 Imp. qt.)
IS200t
Engine
8.2 qt. (7.8 L, 6.9 Imp. qt.)
Intercooler
3.2 qt. (3.0 L, 2.6 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 tech-
nology
Do not use plain water alone.
Ignition system (Spark plug)
IS350/IS300IS200t
Make DENSO FK20HBR11 NGK DILFR7K9G
Gap0.043 in. (1.1 mm)0.035 in. (0.9 mm)
NOTICE
■Iridium-tipped spark plugs
Use only iridium-tipped spark plugs. Do not adjust the spark plug gap.
Electrical system
Battery
Open voltage at 68°F
(20° C):12.3 V or higher
(Check the voltage 20 minutes after the engine and all
lights are turned off.)
If the voltage is lower than the standard value, charge
the battery.
Charging rates5 A max.
Page 586 of 648
5869-1. Specifications
IS350/300/200t_U (OM53D76U)
Light bulbs*
Light bulbsBulb No.WType
Exterior
Front turn signal lights 7444NA28/8A
Rear turn signal lights⎯21A
Outer foot lights⎯5B
Interior
Door courtesy lights1685B
Vanity lights⎯8B
Interior light⎯8B
Personal lights⎯8B
Footwell lights1943.8B
Trunk light⎯5B
A: Wedge base bulbs (amber) B: Wedge base bulbs (clear)
*: Light bulbs not listed in this table are LED bulbs.