Page 498 of 612
496
ES300h_OM_OM33C75U_(U)7-3. Do-it-yourself maintenance
WA R N I N G
■Replacing light bulbs
●Turn off the lights. Do not attempt to replace the bulb immediately after turning off the
lights.
The bulbs become very hot and may cause burns.
●Do not touch the glass portion of the light bulb with bare hands. When it is unavoid-
able to hold the glass portion, use and hold with a clean dry cloth to avoid getting
moisture and oils on the bulb.
Also, if the bulb is scratched or dropped, it may blow out or crack.
●Fully install light bulbs and any parts used to secure them. Failure to do so may result
in heat damage, fire, or water entering th
e headlight unit. This may damage the head-
lights or cause condensation to build up on the lens.
■To prevent damage or fire
●Make sure bulbs are fully seated and locked.
●Check the wattage of the bulb before installing to prevent heat damage.
Page 505 of 612

5038-2. Steps to take in an emergency
ES300h_OM_OM33C75U_(U)
8
When trouble arises
■While towing
If the hybrid system is off, the power assist for the brakes and steering will not function,
making steering and braking more difficult.
■Wheel nut wrench
Wheel nut wrench is installed in trunk. ( →P. 5 1 6 )
WA R N I N G
Observe the following precautions.
Failure to do so may result in death or serious injury.
■When towing the vehicle
■While towing
●When towing using cables or chains, avoid sudden starts, etc. which place excessive
stress on the eyelet, cables or chains. The towing eyelet, cables or chains may
become damaged, broken debris may hit people and cause serious damage.
●Do not turn the power switch off.
There is a possibility that the steering wh eel is locked and cannot be operated.
■Installing towing eyelet to the vehicle
Make sure that towing eyelet is installed securely.
If not securely installed, towing eyelets may come loose during towing.
NOTICE
■To prevent damage to the vehicle when towing using a wheel-lift type truck
●Do not tow the vehicle from the rear when the power switch is off. The steering lock
mechanism is not strong enough to hold the front wheels straight.
●When raising the vehicle, ensure adequate ground clearance for towing at the oppo-
site end of the raised vehicle. Without adequate clearance, the vehicle could be dam-
aged while being towed.
■To prevent damage to the vehicle when towing with a sling-type truck
Do not tow with a sling-type truck, either from the front or rear.
■To prevent damage to the vehicle during emergency towing
Do not secure cables or chains to the suspension components.
Be sure to transport the vehicle with the front
wheels raised or with all four wheels raised off
the ground. If the vehicle is towed with the front
wheels contacting the ground, the drivetrain
and related parts may be damaged or electric-
ity generated by the operation of the motor
may cause a fire to occur depending on the
nature of the damage or malfunction.
Page 514 of 612

5128-2. Steps to take in an emergency
ES300h_OM_OM33C75U_(U)
*: A buzzer sounds the first time a message is shown on the multi-information display.
■If “Hybrid System Overheated Reduced Output Power” is shown
This message may be displayed when driving under severe operating conditions.
(For example, when driving up a long steep hill.)
Handling method: →P. 5 3 3
■If “Maintenance Required for Hybrid Battery Cooling Parts at Your Dealer” is shown
The filter may be clogged, the air intake vent may be blocked or there may be a gap in
duct. Have maintenance performed on the hybrid battery (traction battery) cooling
component at your Lexus dealer.
■If “Hybrid Battery Low Shift Out of N to Recharge” is shown
Message is displayed when the remaining charge for the hybrid battery (traction battery)
is low.
As the hybrid battery (traction battery) can no t be charged when the shift lever is in N,
when stopped for long periods of time shift the shift lever to P.
■If “Hybrid Battery Low Hybrid System St opped Shift to P and Restart” is shown
Message is displayed when the remaining charge for the hybrid battery (traction battery)
is low, because vehicle has been shifted N for a long period of time.
When operating the vehicle, restart the hybrid system.
■If “Shift to P Before Exiting Vehicle” is shown
Message is displayed when the driver’s door is opened without turning the power switch
to OFF with the shift lever in any position other than P.
Shift the shift lever to P.
■If “Shift Is in N Release Accele rator Before Shifting” is shown
Message is displayed when the accelerator pedal has been depressed and the shift lever
is in N. Release the accelerator pedal and shift the shift lever to D or R.
■If “Maintenance Required Soon” is shown (U.S.A. only)
Indicates that all maintenance according to the driven distance on the maintenance
schedule
* should be performed soon.
Comes on approximately 4500 miles (7200 km) after the message has been reset.
If necessary, perform maintenance.
*: Refer to the separate “Scheduled Maintenance” or “Owner’s Manual Supplement” for
the maintenance interval applicable to your vehicle.
Comes onDoes not sound
Indicates a condition, such as malfunc-
tion of electrical components, their
condition, or indicates the need for
maintenance
FlashesDoes not sound
Indicates a situation, such as when an
operation has been performed incor-
rectly, or indicates how to perform an
operation correctly
System
warning
lightWarning buzzer*Wa r n i n g
Page 527 of 612

525
ES300h_OM_OM33C75U_(U)8-2. Steps to take in an emergency
8
When trouble arises
If the hybrid system will not start
One of the following may be the cause of the problem:
●The electronic key may not be functioning properly. (
→P. 5 2 8 )
●There may not be sufficient fuel in the vehicle’s tank.
Refuel the vehicle.
●There may be a malfunction in the immobilizer system. ( →P. 76 )
●There may be a malfunction in the steering lock system.
●The hybrid system may be malfunctioning due to an electrical problem such
as electronic key battery depletion or a blown fuse. However, depending on
the type of malfunction, an interim measure is available to start the hybrid sys-
tem. ( →P. 5 2 6 )
One of the following may be the cause of the problem:
●The 12-volt battery may be discharged. ( →P. 5 2 9 )
●The 12-volt battery terminal connec tions may be loose or corroded.
( → P. 4 6 1 )
One of the following may be the cause of the problem:
●The 12-volt battery may be discharged. ( →P. 5 2 9 )
●One or both of the 12-volt battery terminals may be disconnected. ( →P. 4 6 1 )
Contact your Lexus dealer if the problem cannot be repaired, or if repair procedures
are unknown.
Reasons for the hybrid system not starting vary depending on the situation.
Check the following and perform the appropriate procedure:
The hybrid system will not start ev en though the correct starting proce-
dure is being followed. ( →P. 1 6 8 )
The interior lights and headlights are dim, or the horn does not sound or
sounds at a low volume.
The interior lights and headlights do not turn on, or the horn does not
sound.
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527
ES300h_OM_OM33C75U_(U)8-2. Steps to take in an emergency
8
When trouble arises
If the electronic key does not operate properly
■Doors
Use the mechanical key (
→P. 1 0 5 )
in order to perform the following
operations:
Locks all the doors
Closes the windows and moon
roof (turn and hold)
*
Unlocks the door
Turning the key rearward unlocks the
driver’s door. Turning the key once
again within 5 seconds unlocks the
other doors.
Opens the windows and moon roof (turn and hold)*
*
: This setting must be customized at your Lexus dealer.
■Tr u n k
Turn the mechanical key clockwise
to open.
An alarm will sound if the alarm is set.
( → P. 7 8 )
If communication between the electronic key and vehicle is interrupted
(→ P. 123) or the electronic key cann ot be used because the battery is
depleted, the smart access system with push-button start and wireless
remote control cannot be used. In such cases, the doors and trunk can be
opened and the hybrid system can be started by following the procedure
below.
Locking and unlocking the doors, unlocking the trunk and key linked
functions
1
2
3
4
Page 531 of 612
529
ES300h_OM_OM33C75U_(U)8-2. Steps to take in an emergency
8
When trouble arises
If the 12-volt battery is discharged
If you have a set of jumper (or booster) cables and a second vehicle with a 12-volt
battery, you can jump start your vehicle by following the steps below.
Confirm that the electronic key is
being carried.
When connecting the jumper (or
booster) cables, depending on the situa-
tion, the alarm may activate and doors
locked. ( →P. 7 9 )
Open the trunk lid and remove the 12-volt battery cover. (→ P. 4 6 1 )
In the event that the trunk opener cannot be used, use the mechanical key to open the
trunk. ( →P. 5 2 7 )
Connect the jumper cables according to the following procedure:
The following procedures may be used to start the hybrid system if the 12-volt
battery is discharged.
You can also call your Lexus dealer or a qualified repair shop.
1
2
3
Page 533 of 612

5318-2. Steps to take in an emergency
ES300h_OM_OM33C75U_(U)
8
When trouble arises
■Starting the hybrid system when the 12-volt battery is discharged
The hybrid system cannot be started by push-starting.
■To prevent 12-volt battery discharge
●Turn off the headlights and the audio syst em while the hybrid system is stopped.
●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 12-volt battery
The electricity stored in the 12-volt battery will discharge gradually even when the vehicle
is not in use, due to natural discharge and the draining effects of certain electrical appli-
ances. If the vehicle is left for a long time, the 12-volt battery may discharge, and the
hybrid system may be unable to start. (The 12-volt battery recharges automatically while
the hybrid system is operating.)
■When recharging or replacing the 12-volt battery
●In some cases, it may not be possible to unlock the doors using the smart access system
with push-button start when the 12-volt battery is discharged. Use the wireless remote
control or the mechanical key to lock or unlock the doors.
●The hybrid system may not start on the first attempt after the 12-volt battery has
recharged but will start normally after the second attempt. This is not a malfunction.
●The power switch mode is memorized by the vehicle. When the 12-volt battery is
reconnected, the system will return to the mode it was in before the 12-volt battery was
discharged. Before disconnecting the 12-volt battery, turn the power switch off.
If you are unsure what mode the power switch was in before the 12-volt battery dis-
charged, be especially careful when reconnecting the 12-volt battery.
Page 544 of 612
542
ES300h_OM_OM33C75U_(U)9-1. Spec
ifications
■Engine number
The engine number is stamped on
the engine block as shown.
Engine
Model2.5L 4-cylinder (2AR-FXE)
Ty p e4-cylinder in line, 4-cycle, gasoline
Bore and stroke3.54 × 3.86 in. (90.0 × 98.0 mm)
Displacement152.2 cu.in. (2494 cm3)
Va l v e c l e a r a n c eAutomatic adjustment
Fuel
Fuel typeUnleaded gasoline only
Octane Rating87 (Research Octane Number 91) or higher
Fuel tank capacity
(Reference)17.0 gal. (64.35 L, 14.2 Imp.gal.)
Electric motor (Traction motor)
Ty p ePermanent magnet synchronous motor
Maximum output105 kW
Maximum torque199 ft•lbf (270 N•m, 27.5 kgf•m)