fuse LEXUS RX450H 2020 User Guide

6267-3. Do-it-yourself maintenance
RX350/RX350L_U
Remove the fuse with the pullout
tool.
Only some fuses can be removed
using the pullout tool.
Check if the fuse is blown. Normal fuse
Blown fuse
Replace the blown fuse with a new
fuse of an appropriate amperage rat-
ing. The amperage rating can be
found on the fuse box lid.
Many types of fuse are used on this
vehicle. This illustration shows a com-
mon type of fuse used on this vehicle.
■After a fuse is replaced
●If the lights do not turn on even after the fuse has been replaced, a bulb may need
replacement. ( P. 630)
●If the replaced fuse blows again, have th e vehicle inspected by your Lexus dealer.
■If there is an overload in a circuit
The fuses are designed to blow, protecting the wiring harness from damage.
■When replacing light bulbs
Lexus recommends that you use genuine Lexus products designed for this vehicle.
Because certain bulbs are conne cted to circuits designed to prevent overload, nongenu-
ine parts or parts not designed for this vehicle may be unusable.
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WARNING
■To prevent system breakdowns and vehicle fire
Observe the following precautions.
Failure to do so may cause damage to th e vehicle, and possibly a fire or injury.
●Never use a fuse of a higher amperage rating than that indicated, or use any other
object in place of a fuse.
●Always use a genuine Lexus fuse or equivalent.
Never replace a fuse with a wire, even as a temporary fix.
●Do not modify the fuses or fuse boxes.

6277-3. Do-it-yourself maintenance
7
Maintenance and care
RX350/RX350L_U
NOTICE
■Before replacing fuses
Have the cause of electrical overload determined and repaired by your Lexus dealer as
soon as possible.

6828-2. Steps to take in an emergency
RX350/RX350L_U
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. 231)
●There may be a malfunction in th e engine immobilizer system. (P. 74)
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. 687)
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. 683)
If the engine will not start
If the engine will not start even though correct starting procedures are being
followed ( P. 231), 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

763Alphabetical index
RX350/RX350L_U
Flat tire ...................................................... 666
Floor mats ................................................... 28
FluidAutomatic transmission ..................703
Brake ........................................................704
Washer .................................................. 603
Fog lights Replacing light bulbs ....................... 630
Switch...................................................... 260
Front automatic air conditioning system .........................503
Front passenger footwell hooks ..... 554
Front passenger occupant classification system .............................47
Front passenger’s seat belt reminder light ..................................... 656
Front seat heaters................................. 522
Front seats .................................................156 Adjustment ............................................. 156
Cleaning .................................................. 581
Correct driving posture ....................30
Driving position memory ................. 172
Head restraints ...................................... 177
Power easy access system ............. 172
Seat heaters .......................................... 522
Seat position memory........................ 172 Front side marker lights
Light switch........................................... 252
Replacing light bulbs .......................630
Wattage ................................................. 705
Front turn signal lights Replacing light bulbs .......................630
Turn signal lever ................................. 246
Wattage ................................................. 705
Fuel Capacity.................................................700
Fuel gauge ............................................... 86
Information............................................ 706
Refueling ................................................ 269
Type..........................................................700
Fuel filler door.........................................269 Refueling ................................................ 269
When the fuel filler door cannot be opened ..........................272
Fuses.......................................................... 625
F

769Alphabetical index
RX350/RX350L_U
Radar cruise control (dynamic radar cruise control
with full-speed range) .....................300
Radiator .................................................... 599
Radio.......................................................... 420
Rear automatic air conditioning system ..................................................... 518
Rear Cross Traffic Alert ......................313
Rear Cross Traffic Auto Brake.......350
Rear door sunshades .......................... 554
Rear passengers' seat belt reminder light ..................................... 656
Rear seat Folding down the rear seatbacks ............................................. 157
Rear side marker lights Light switch ........................................... 252
Replacing light bulbs ....................... 630
Rear turn signal lights Replacing light bulbs ....................... 630
Turn signal lever .................................246
Wattage ................................................. 705
Rear view mirror Inside rear view mirror ..................... 182
Outside rear view mirrors .............. 184 Rear window defogger ........................ 513
Rear window wiper .............................. 267
Refueling...................................................269
Capacity.................................................700
Fuel types...............................................700
Opening the fuel tank cap ............ 269
When the fuel filler door cannot be opened ..........................272
Remote Touch
*.....................................496
Replacing Electronic key battery ..................... 623
Fuses ........................................................ 625
Light bulbs.............................................630
Tires ..........................................................666
Windshield wiper inserts ................. 621
Reporting safety defects for U.S. owners ......................................... 738
Resetting the message indicating maintenance is required ................ 585
Rev indicator ............................................. 88
Rev peak ..................................................... 88
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