2022 LEXUS ES300h fuse box

3236-3. Do-it-yourself maintenance
6
Maintenance and care
Fuse boxes (P.349)
Engine oil filler cap ( P.324)
Engine oil level dipstick ( P.323)
Brake fluid reservoir ( P.327)
Radiator ( P.326)
Electric cooling fan
Condenser ( P.326)
Power control unit coolant reservoir ( P.326)
Engine coolant reservoir ( P.325)
Washer fluid tank ( P.327)
Q12-volt battery
 P.328
With the engine at operating tempera-
ture and turned off, check the oil level
Engine compartment
Components
A
B
C
D
E
F
G
H
I
J
Checking and adding the engine
oil

3496-3. Do-it-yourself maintenance
6
Maintenance and care
1Turn the power switch off.
2 Open the Fuse box cover.
Engine compartment: type A fuse
box
Push the tab in and lift the lid off.
Engine compartment: type B fuse
box
Push the tab in and lift the lid off.
Driver’s side instrument panel
Push the tab in and remove the lid. Make sure to push the tab in during
removal or installation.
3
Remove the fuse with the pullout
tool.
Only type A fuses can be removed using
the pullout tool.
4Check if the fuse is blown.
Type A and B:
Replace the blown fuse with a new fuse of
an appropriate amperage rating. The
amperage rating can be found on the fuse
box lid.
Type C:
Contact your Lexus dealer.
Type A
Checking and replacing
fuses
If any of the electrical components
do not operate, a fuse may have
blown. If this happens, check and
replace the fuses as necessary.
Checking and replacing fuses

3506-3. Do-it-yourself maintenance
Normal fuse
Blown fuse
Type BNormal fuse
Blown fuse
Type CNormal fuse
Blown fuse
QAfter a fuse is replaced
OWhen installing the lid, make sure that the
tab is installed securely.
OIf the lights do not turn on even after the
fuse has been replaced, a bulb may need
replacement. ( P.352)
OIf the replaced fuse blows again, have the
vehicle inspected by your Lexus dealer.
QIf there is an overload in a circuit
The fuses are designed to blow, protecting
the wiring harness from damage.
A
B
A
B
A
B
WARNING
QTo prevent system breakdowns and
vehicle fire
Observe the following precautions.
Failure to do so may cause damage to
the vehicle, and possibly a fire or injury.
ONever use a fuse of a higher amperage
rating than that indicated, or use any
other object in place of a fuse.
OAlways use a genuine Lexus fuse or
equivalent.
Never replace a fuse with a wire, even
as a temporary fix.
ODo not modify the fuses or fuse boxes.
NOTICE
QBefore replacing fuses
Have the cause of electrical overload
determined and repaired by your Lexus
dealer as soon as possible.

3917-2. Steps to take in an emergency
7
When trouble arises
QAlarm (for Canada)
Using the mechanical key to lock the doors
will not set the alarm system.
If a door is unlocked using the mechanical
key when the alarm system is set, the alarm
may be triggered.
QChanging power switch modes
Release the brake pedal and press the
power switch in step 3 above.
The hybrid system does not start and modes
will be changed each time the switch is
pressed. ( P.151)
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 using the following procedure.
1 Confirm that the electronic key is
being carried.
When connecting the jumper (or booster)
cables, depending on the situation, the
alarm may activate and doors locked.
( P.69)
2 Open the hood ( P.321) and
open the fuse box cover.
If the 12-volt battery is dis-
charged
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.
Restarting the hybrid system

3937-2. Steps to take in an emergency
7
When trouble arises
6Open and close any of the doors of
your vehicle with the power switch
off.
7 Maintain the engine speed of the
second vehicle and start the hybrid
system of your vehicle by turning
the power switch to ON mode.
8 Make sure the “READY” indicator
comes on. If the indicator does not
come on, contact your Lexus
dealer.
9 Once the vehicle’s hybrid system
has started, remove the jumper
cables in the exact reverse order
from which they were connected.
10 Close the exclusive jump starting
terminal cover, and reinstall the
fuse box cover to its original posi-
tion.
Once the hybrid system starts, have the
vehicle inspected at your Lexus dealer as
soon as possible.
QStarting the hybrid system when the 12-
volt battery is discharged
The hybrid system cannot be started by
push-starting.
QTo prevent 12-volt battery discharge
OTurn off the headlights and the audio sys-
tem while the hybrid system is stopped.
OTurn off any unnecessary electrical com-
ponents when the vehicle is running at a
low speed for an extended period, such
as in heavy traffic.
QWhen the 12-volt battery is removed or
discharged
OInformation stored in the ECU is cleared.
When the 12-volt battery is depleted,
have the vehicle inspected at your Lexus
dealer.
OSome systems may require initialization.
(  P.433)
QWhen removing the 12-volt battery ter-
minals
When the 12-volt battery terminals are
removed, the information stored in the
ECU is cleared. Before removing the 12-
volt battery terminals, contact your Lexus
dealer.
QCharging 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 dis-
charge and the draining effects of certain
electrical appliances. If the vehicle is left for
a long time, the 12-volt battery may dis-
charge, and the hybrid system may be
unable to start. (The 12-volt battery
recharges automatically while the hybrid
system is operating.)
QWhen recharging or replacing the 12-
volt battery
OIn 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 mechani-
cal key to lock or unlock the doors.
OThe 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.
OThe 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
discharged, be especially careful when
reconnecting the 12-volt battery.
QWhen replacing the 12-volt battery
OUse a 12-volt battery that conforms to
European regulations.
OUse a 12-volt battery that the case size is
same as the previous one (LN2), 20 hour
rate capacity (20HR) is equivalent
(60Ah) or greater, and performance rat-
ing (CCA) is equivalent (563A) or
greater.

454Alphabetical index
ACCESSORY mode ................................ 151
Compartment ............................................. 323
Hood.................................................................. 321
How to start the hybrid system ........... 148
Identification number ...............................403
If the hybrid system will not start ........386
If your vehicle has to be stopped in an emergency ............................................... 358
Ignition switch (power switch) ............. 148
Overheating .................................................396
Power switch ................................................ 148
Tachometer ............................................ 76, 80
Engine coolant .............................................. 325 Capacity .........................................................405
Checking ....................................................... 325
Preparing and checking before winter.........................................................................260
Engine coolant temperature gauge76, 80
Engine oil ........................................................ 323 Capacity .........................................................404
Checking ....................................................... 323
Preparing and checking before winter.........................................................................260
Warning light ...............................................365
Engine oil maintenance data .................. 325
EPS (Electric Power Steering) .............. 253 Function .......................................................... 253
Warning light ...............................................366
EV drive mode................................................153
Event data recorder (EDR) ........................... 8
EV indicator ...................................................... 60
F
Flat tire ............................................................. 379 Tire pressure warning system ............. 333
Floor mats ...........................................................22
Fluid Brake................................................................406
Hybrid transmission .................................406
Washer ........................................................... 327
Footwell light ................................................. 282
Front passenger occupant classification system ...............................................................37
Front seats ........................................................120 Adjustment ..................................................... 120
Cleaning ............................................................ 311
Correct driving posture ............................ 23
Driving position memory .......................... 121
Head restraints..............................................124
Memory recall function.............................123
Power easy access system ...................... 121
Seat heaters ..................................................278
Seat position memory ................................ 121
Seat ventilators ............................................278
Front side marker light ................................163 Light switch .................................................... 163
Front side marker lights Replacing light bulbs................... 352, 353
Wattage ......................................................... 409
Front turn signal lights ................................ 158 Replacing light bulbs................... 352, 353
Turn signal lever .......................................... 158
Wattage ......................................................... 409
Fuel ...................................................................... 174 Capacity ........................................................ 403
Fuel gauge...............................................76, 80
Information ..................................................... 410
Refueling...........................................................174
Type ................................................................. 403
Warning light ...............................................367
Fuel consumption Average fuel economy .............................. 87
Current fuel consumption ........................ 87
Fuel filler door ................................................. 174 If the fuel filler door cannot be opened......................................................................... 388
Refueling...........................................................174
Fuel gauge ................................................. 76, 80
Fuses ................................................................. 349
G
Garage door opener ................................. 298
Gauges ....................................................... 76, 80
Glove box ....................................................... 286