2017 Lexus IS300h check engine

5527-3. Do-it-yourself maintenance
IS300h_EE(OM53D89E)
Turn the power switch off.
Open the fuse box cover.
Engine compartment:
Remove the clips.
Push the tabs on either side to
detach the lock and lift the lid off
while pulling the lock plate.
When installing the lid, check that the
lock plate and the tabs on either side
are connected correctly.
Checking and replacing fuses
If any of the electrical components do not operate, a fuse may have blown. If
this happens, check and repl ace the fuses as necessary.
1
2

5968-2. Steps to take in an emergency
IS300h_EE(OM53D89E)
Indicates a malfunction in the brake override system
A buzzer also sounds.
 Have the vehicle inspected by any authorized Lexus retailer or Lexus authorized repairer, or any reliable
repairer.
Indicates that engine oil level is low
This message may ap pear if the vehicle is stopped on a
slope. Move the vehicle to a level surface and check to see if the message disappears.
 Check the level of engine oil, and add if necessary.
Indicates that the hybrid system has overheated This message may be disp layed when driving under
severe operating conditions. (For example, when driv-
ing up a long steep hill.) A buzzer also sounds.
 Stop and check. (P. 636)
Indicates a malfunction in:
• The automatic headlight leveling system; or • The Automatic High Beam system (if equipped); or
• The LED headlight system
A buzzer also sounds.  Have the vehicle inspected by any authorized Lexus
retailer or Lexus authorized repairer, or any reliable
repairer.
Warning messageDetails/Actions

5988-2. Steps to take in an emergency
IS300h_EE(OM53D89E)
Indicates that the outside temperature is approximately
3 C (37F) or lower A buzzer also sounds.
 Drive carefully, as the road may be icy.
Indicates that the TRC (Traction Control) system has
been deactivated  Turn the TRC on. (P. 354)
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.
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
any authorized Lexus retailer or Lexus authorized repairer, or any reliable repairer. After changing the
engine oil, the message should be reset.
(If equipped)
Indicates that the Automa tic 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

6398-2. Steps to take in an emergency
8
When trouble arises
IS300h_EE(OM53D89E)
Start the hybrid system and check if “Hybrid System Overheated Reduced
Output Power” is shown on the multi-information display.
If the message does not disappear:
Stop the hybrid system and contact an y authorized Lexus retailer or Lexus
authorized repairer, or any reliable repairer.
If the message is not displayed:
Have the vehicle inspected at the nearest authorized Lexus retailer or
Lexus authorized repairer, or any reliable repairer.
WARNING
■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 be lt and fan, which may lead to fingers or
clothing (especially a tie, a scarf or a mu ffler) getting caught, resulting in serious
injury.
6
●Do not loosen the c oolant reservoir caps or
water filler cap while th e hybrid system and
radiator are hot. High temperature steam or coolant could
spray out.

647
9
9-1. Specifications
Vehicle specifications
IS300h_EE(OM53D89E)
■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 Ge nuine Motor Oil”. Another motor oil of
matching quality can also be used.
Oil grade:
0W-20, 5W-30 and 10W-30:
API grade SL “Energy-Conserving”, SM “Energy-Conserving” or SN
“Resource-Conserving”; or IL SAC multigrade engine oil
15W-40:
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
0W-20 or 5W-30 engine oil is rec-
ommended.
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

675Alphabetical index
IS300h_EE(OM53D89E)
Condenser .............................................. 521
Console box ...........................................485
Coolant ...................................................... 519
Capacity .................................................649
Checking ................................................ 519
Preparing and checking
before winter ......................................361
Cooling system....................................... 519
Engine overheating ..........................636
Hybrid system overheating ..........636
Cruise control
Cruise control .................................... 305
Dynamic radar cruise control ..... 293
Cup holders ............................................486
Current fuel
consumption..................... 130, 132, 134
Curtain shield airbags ........................... 43
Customizable features ....................... 657
DAB (Digital Audio Broadcast)..... 394
Daytime running light system ......... 238
Defogger
Outside rear view mirrors .............474
Rear window.........................................474
Windshield ............................................474
Differential.................................................651
Digital Audio Broadcast (DAB)..... 394
Dimensions ............................................. 644
Display
Drive information...................................116
Dynamic radar cruise control ..... 293
LDA (Lane Departure Alert
with steering control)................... 283
Multi-information display.....................111
Warning message ..............................581
Do-it-yourself maintenance ................ 511
Door courtesy lights
Location ...................................................481
Wattage ................................................. 654
Door lock
Doors......................................................... 144
Smart entry & start system ............. 157
Wireless remote control .................138
D

677Alphabetical index
IS300h_EE(OM53D89E)
Emergency, in case of
If a warning message is
displayed ............................................. 581
If the 12-volt battery is
discharged...........................................631
If the electronic key does not
operate properly ............................628
If the hybrid system will not
start ........................................................ 626
If the warning buzzer sounds ......575
If the warning light turns on ..........575
If you have a flat tire ............... 610, 625
If you think something
is wrong............................................... 574
If your vehicle becomes stuck.......641
If your vehicle has to be
stopped in an emergency.......... 567
If your vehicle needs to
be towed............................................ 568
If your vehicle overheats ................636
Electronically Controlled
Brake System (ECB) ...................... 352
Emergency brake signal.................... 353
Emergency flashers ............................. 566
Emergency tire puncture
repair kit ................................................. 610
Energy monitor ....................................... 127
Engine ....................................................... 646
ACCESSORY mode ..................... 220
Compartment .......................................515
Engine switch ........................................ 219
Hood ......................................................... 513
How to start the hybrid
system.................................................... 219
Identification number....................... 645
Ignition switch
(power switch) .................................. 219
Overheating ........................................ 636
Power switch ......................................... 219
Engine coolant.........................................519
Capacity................................................. 649
Checking .................................................519
Preparing and checking
before winter...................................... 361

678Alphabetical index
IS300h_EE(OM53D89E)
Engine coolant temperature
gauge....................................................... 105
Engine oil................................................... 516
Capacity ................................................. 647
Checking ................................................ 516
Preparing and checking
before winter ......................................361
Engine oil maintenance data............. 518
Engine switch .......................................... 219
EPS (Electric Power Steering)........ 352
Warning light ....................................... 576
ERA-GLONASS. ................................ 496
EV drive mode ....................................... 224
EV indicator ............................................... 79
First-aid kit storage belt .....................488
Flat tire
Vehicles with emergency
tire puncture repair kit ...................610
Vehicles with run-flat tires ............ 625
Floor mats ................................................... 34
Fluid
Brake .........................................................651
Hybrid
transmission......................................650
Washer..................................................... 521
Fog light .................................................... 244
Replacing light bulbs ....................... 562
Switch .......................................................244
Follow me home system .................... 238
Footwell light ........................................... 481
Wattage ................................................. 654
Front personal lights............................ 482
Wattage ................................................. 654
Front position lights ............................. 237
Light switch............................................237
Replacing light bulbs ....................... 562
F