2018 Lexus ES300h engine

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ES300h_OM_OM33D45U_(U)7-3. Do-it-yourself maintenance
7
Maintenance and care
Light bulbs
Check the wattage of the light bulb to be replaced. (
→P. 546)
→ P. 448
■Front
Front side marker light
Headlight high beam (halogen bulb)
Front turn signal light
You may replace the following bulbs by yo urself. The difficulty level of replace-
ment varies depending on the bulb. If necessary bulb replacement seems diffi-
cult to perform, contact your Lexus dealer.
For more information about replacing other light bulbs, contact your Lexus
dealer.
Preparing for light bulb replacement
Removing the engine compartment cover
Bulb locations
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502
ES300h_OM_OM33D45U_(U)8-2. Steps to take in an emergency
If you think something is wrong
●Fluid leaks under the vehicle.
(Water dripping from the air conditioning after use is normal.)
●Flat-looking tires or uneven tire wear
●Engine coolant temperature gauge needle
continually points higher than nor-
mal.
●Changes in exhaust sound
●Excessive tire squeal when cornering
●Strange noises related to the suspension system
●Pinging or other noises related to the hybrid system
●Engine missing, stumbling or running roughly
●Appreciable loss of power
●Vehicle pulls heavily to one side when braking
●Vehicle pulls heavily to one side when driving on a level road
●Loss of brake effectiveness, spongy feeling, pedal almost touches the floor
If you notice any of the following symptoms, your vehicle probably needs
adjustment or repair. Contact your Lexus dealer as soon as possible.
Visible symptoms
Audible symptoms
Operational symptoms

503
ES300h_OM_OM33D45U_(U)8-2. Steps to take in an emergency
8
When trouble arises
If a warning light turns on or a warning buzzer
sounds
Calmly perform the following actions if any of the warning lights comes on or
flashes. If a light comes on or flashes, but then goes off, this does not necessar-
ily indicate a malfunction in the system
. However, if this continues to occur,
have the vehicle inspecte d by your Lexus dealer.
Warning light and warning buzzer list
Warning lightWarning light/Details/Actions
(U.S.A.)
(Canada)
Brake system warning light (red indicator) and warning buzzer
Indicates that:
• The brake fluid level is low; or
• The brake system is malfunctioning
→ Immediately stop the vehicle in a safe place and contact your
Lexus dealer. Continuing to drive the vehicle may be dangerous.
Brake system warning light (yellow indicator)
Indicates a malfunction in:
• The regenerative brake system; or
• The electronically controlled brake system
→ Have the vehicle inspected by your Lexus dealer immediately.
(U.S.A.)
(Canada)
Malfunction indicator lamp Indicates a malfunction in:
• The hybrid system;
• The electronic engine control system;
• The electronic throttle control system; or
• The electronic hybrid transmission control system
→ Have the vehicle inspected by your Lexus dealer immediately.
SRS warning light
Indicates a malfunction in:
• The SRS airbag system;
• The front passenger occupant classification system; or
• The seat belt pretensioner system
→ Have the vehicle inspected by your Lexus dealer immediately.
(U.S.A.)
(Canada)
ABS warning light Indicates a malfunction in:
• The ABS; or
• The brake assist system
→ Have the vehicle inspected by your Lexus dealer immediately.

5118-2. Steps to take in an emergency
ES300h_OM_OM33D45U_(U)
8
When trouble arises
■If “Maintenance Required Visit Your Dealer” is shown (U.S.A. only)
Indicates that all maintenance 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. 437)
*: Refer to the separate “Scheduled Maintena nce” or “Owner’s Manual Supplement” for
the maintenance interval applicable to your vehicle.
■If “Oil Maintenance Required Soon” is shown
Indicates that the engine oil is scheduled to be changed. (The indicator will not work
properly unless the oil mainte nance data has been reset.)
Check the engine oil, and change if necessary. After changing the engine oil, the oil
change system should be reset. ( →P. 451)
■If “Oil Maintenance Required” is shown
Indicates that the engine oil should be changed. (After the engine oil is changed and the
oil maintenance data has been reset.)
Check and change the engine o il, and oil filter by your Lexus dealer. After changing the
engine oil, the oil change system should be reset. (→ P. 451)
■If “Power Turned Off to Save Battery” is shown
Power was turned off due to the automatic power off function.
Next time when starting the hybrid system, operate the hybrid system for approximately
5 minutes to recharge the 12-volt battery.
■If “Forward Camera System Unavailable” or “Forward Camera System Unavailable
Clean Windshield” is displayed.
The following systems may be suspended until the problem shown in the message is
resolved. ( →P. 215, 503)
●PCS (Pre-Collision System)
●LDA (Lane Departure Alert with steering control)
●Dynamic radar cruise control
●Automatic High Beam
■When a message that indicates the need for the shift lever operation is shown
To prevent the shift lever from being operat ed incorrectly or the vehicle from moving
unexpectedly, a message that re quires shifting the shift lever may be shown on the multi-
information display. In that case, follow the instruction of the message and shift the shift
lever.
■If “Visit Your Dealer” is shown
The system or part shown on the multi-info rmation display is malfunctioning. Have the
vehicle inspected by your Lexus dealer immediately.

5128-2. Steps to take in an emergency
ES300h_OM_OM33D45U_(U)
■If “See Owner’s Manual” is shown
●If the following message is shown, following the instructions, accordingly.
• “Engine Coolant Temp High” ( →P. 531)
●If the following messages are sh own, there may be a malfunction.
Immediately have the vehicle inspected by your Lexus dealer.
• “Check Access System with Elec. Key”
• “Hybrid System Malfunction”
●If the following messages are sh own, there may be a malfunction.
Immediately stop the vehicle in a safe place and contact your Lexus dealer. Continuing
to drive the vehicle may be dangerous.
• “Braking Power Low Stop in a Safe Place”
• “Charging System Malfunction”
• “Oil Pressure Low Stop in a Safe Place”
■Warning buzzer
In some cases, the buzzer may not be heard because of noisy place or an audio sound.

5228-2. Steps to take in an emergency
ES300h_OM_OM33D45U_(U)
WARNING
■When using the compact spare tire
●Remember that the compact spare tire provided is specifically designed for use with
your vehicle. Do not use your comp act spare tire on another vehicle.
●Do not use more than one compact spare tire simultaneously.
●Replace the compact spare tire with a standard tire as soon as possible.
●Avoid sudden acceleration, abrupt steering, sudden braking and shifting operations
that cause sudden engine braking.
■When the compact spare tire is attached
The vehicle speed may not be correctly detected, and the following systems may not
operate correctly:
■Speed limit when using the compact spare tire
Do not drive at speeds in excess of 50 mph (80 km/h) when a compact spare tire is
installed on the vehicle.
The compact spare tire is not designed for driving at high speeds. Failure to observe
this precaution may lead to an accident causing death or serious injury.
■After using the tools and jack
Before driving, make sure all the tools and jack are securely in place in their storage
location to reduce the possibilit y of personal injury during a collision or sudden brak-
ing.
NOTICE
■Driving with tire chains and the compact spare tire
Do not fit tire chains to the compact spare tire.
Tire chains may damage the vehicle body and adversely affect driving performance.
■When replacing the tires
When removing or fitting the wheels, tires or the tire pressure warning valve and trans-
mitter, contact your Lexus dealer as the tire pressure warning valve and transmitter
may be damaged if not handled correctly.
• ABS & Brake assist
•VSC
•TRAC
• Dynamic radar cruise control
•PCS
•EPS • LDA (Lane Departure Alert with
steering control)
• Lexus parking assist monitor
• Intuitive parking assist (if equipped)
• Navigation system (if equipped)

5288-2. Steps to take in an emergency
ES300h_OM_OM33D45U_(U)
Connect a positive jumper cable clamp to the positive (+) battery terminal
on your vehicle.
Connect the clamp on the other end of the positive cable to the positive (+)
battery terminal on the second vehicle.
Connect a negative cable clamp to the negative (-) battery terminal on the
second vehicle.
Connect the clamp at the other end of the negative cable to a solid, station-
ary, unpainted metallic point away fr om the 12-volt battery and any moving
parts, as shown in the illustration.
Start the engine of the second vehicle. Increase the engine speed slightly and
maintain at that level for approximatel y 5 minutes to recharge the 12-volt bat-
tery of your vehicle.
Open and close any of the doors of your vehicle with the power switch off.
Maintain the engine speed of the seco nd vehicle and start the hybrid system
of your vehicle by turning th e power switch to ON mode.
Make sure the “READY” indicator come s on. If the indicator does not come
on, contact your Lexus dealer.
Once the hybrid system has started, remove the jumper cables in the exact
reverse order from which they were connected.
Once the hybrid system starts, have th e vehicle inspected at your Lexus dealer
as soon as possible.1
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531
ES300h_OM_OM33D45U_(U)8-2. Steps to take in an emergency
8
When trouble arises
If your vehicle overheats
■If the needle of the engine coolant temperature gauge enters the red zone
Stop the vehicle in a safe place and turn off the air conditioning system, and
then stop the hybrid system.
If you see steam:
Carefully lift the hood after the steam subsides.
If you do not see steam:
Carefully lift the hood.
After the hybrid system has
cooled down sufficiently, inspect
the hoses and cooling system for
leaks.Radiator
Cooling fans
If a large amount of coolant leaks,
immediately contact your Lexus
dealer.
The coolant level is satisfactory if
it is between the “FULL” and
“LOW” lines on the reservoir.Reservoir
“FULL”
“LOW”
Radiator cap
The following may indicate that your vehicle is overheating.
●The needle of the engine coolant temperature gauge ( →P. 86) enters the
red zone or a loss of hybrid system po wer is experienced. (For example, the
vehicle speed does not increase.)
●“Hybrid System Overheated” is shown on the multi-information display.
●Steam comes out from under the hood.
Correction procedures
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