fuse LEXUS RX450h 2016 Owners Manual

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RX450h_U_OM0E013U 56-1. Maintenance and care
Cleaning and protecting
the vehicle exterior ................ 458
Cleaning and protecting
the vehicle inte rior.................. 462
6-2. Maintenance
Maintenance
requirements ............................ 465
General maintenance...............467
Emission inspection and
maintenance (I/M)
programs .....................................470
6-3. Do-it-yourself
maintenance
Do-it-yourself service
precautions.................................. 471
Hood ................................................473
Positioning a floor jack.............. 474
Engine compartment ................475
12-volt battery ............................. 483
Tires.................................................. 487
Tire inflation pressure ............... 496
Wheels ........................................... 499
Air conditioning filter ................ 501
Windshield wiper inserts ........ 504
Electronic key battery.............. 506
Checking and replacing
fuses..............................................508
Headlight aim ................................. 511
Light bulbs ......................................513 7-1. Essential information
Emergency flashers .................. 528
If your vehicle has to be
stopped in an
emergency ................................ 529
7-2. Steps to take in an
emergency
If your vehicle needs to be
towed ........................................... 530
If you think something is
wrong........................................... 535
If a warning light turns
on or a warning buzzer
sounds ......................................... 536
If a warning message is
displayed .................................... 543
If you have a flat tire .................. 549
If the hybrid system will not
start ................................................. 561
If the shift lever cannot be
shifted from P ........................... 563
If the electronic key does
not operate properly ............. 564
If the 12-volt battery is
discharged ................................. 568
If your vehicle overheats .......... 574
If the vehicle becomes
stuck ............................................. 5786
Maintenance and care 7
When trouble arises

442 5-5. Using the other interior features
RX450h_U_OM0E013U Use the front passenger footwell hooks
to help support and prevent objects
placed on the floor, such as a grocery
bag, from overturning. NOTICE ●
To avoid damaging the power outlet, close the power outlet lid when the power outlet
is not in use.
Foreign objects or liquids that enter the power outlet may cause a short circuit. ●
To prevent blown fuse, do not use a 120 VAC appliance that requires more than
100 W.
If a 120 VAC appliance that consumes more than 100 W is used, the protection cir-
cuit will cut the power supply. ●
To prevent 12-volt battery discharge, do not use the power outlet longer than neces-
sary when the hybrid system is off. ●
The following 120 VAC appliances may not op erate properly even if their power con-
sumption is under 100W:
• Appliances with high initial peak wattage
• Measuring devices that process precise data
• Other appliances that require an extremely stable power supply
Front passenger footwell hooks
NOTICE
To prevent the hooks from being damaged, do not hang anything from a hook or apply
excessive force to it.

457
6Maintenance and care
RX450h_U_OM0E013U 6-1. Maintenance and care
Cleaning and protecting
the vehicle exterior ................ 458
Cleaning and protecting
the vehicle interior .................. 462
6-2. Maintenance
Maintenance
requirements .............................465
General maintenance .............. 467
Emission inspection and
maintenance (I/M)
programs .................................... 470 6-3. Do-it-yourself
maintenance
Do-it-yourself service
precautions .................................. 471
Hood ................................................473
Positioning a floor jack .............. 474
Engine compartment ............... 475
12-volt battery..............................483
Tires .................................................. 487
Tire inflation pressure ............... 496
Wheels ........................................... 499
Air conditioning filter ................ 501
Windshield wiper inserts ........504
Electronic key battery ..............506
Checking and replacing
fuses ............................................. 508
Headlight aim ................................. 511
Light bulbs...................................... 513

471
RX450h_U_OM0E013U 6
Maintenance and care 6-3. Do-it-yourself maintenance
Do-it-yourself service precautions If you perform maintenance by yourself, be sure to follow the correct proce-
dure as given in these sections. Items Pa r t s a n d t o o l s
12-volt battery con-
dition (  P. 4 8 3 ) •Grease
• Conventional wrench (for terminal clamp bolts)
Brake fluid level
(  P. 4 8 1 ) • FMVSS No.116 DOT 3 or SAE J1703 brake fluid
• Rag or paper towel
• Funnel (used only for adding brake fluid)
Engine/power con-
trol unit coolant level
(  P. 4 7 9 ) • “Toyota Super Long Life Coolant” or a similar high quality
ethylene glycol-based non-silicate, non-amine, non-nitrite
and non-borate coolant with long-life hybrid organic acid
technology
For the U.S.A.:
“Toyota Super Long Life Coolant” is pre-mixed with 50%
coolant and 50% deionized water.
For Canada:
“Toyota Super Long Life Coolant” is pre-mixed with 55%
coolant and 45% deionized water.
• Funnel (used only for adding coolant)
Engine oil level
(  P. 4 76 ) • “Toyota Genuine Motor Oil” or equivalent
• Rag or paper towel
• Funnel (used only for adding engine oil)
Fuses (  P. 5 0 8 ) • Fuse with same amperage rating as original
Headlight aim
*
(  P. 511) • Phillips-head screwdriver
Light bulbs
(  P. 5 1 3 ) • Bulb with same number and wattage rating as original
•Flathead screwdriver •Wrench
Radiator and con-
denser (  P. 4 8 0 ) 
Tire inflation pres-
sure (  P. 4 9 6 ) • Tire pressure gauge • Compressed air source

4756-3. Do-it-yourself maintenance
6
Maintenance and care
RX450h_U_OM0E013U ■
12-volt battery
 P. 4 8 3Engine compartment
Wa s h e r f l u i d t a n k (  P. 4 8 2 )
Brake fluid reservoir (  P. 4 8 1 )
Engine oil level dipstick
(  P. 4 76 )
Engine coolant reservoir
(  P. 4 7 9 )
Power control unit coolant reservoir
(  P. 4 7 9 ) Fuse boxes (  P. 5 0 8 )
Radiator (  P. 4 8 0 )
Power control unit coolant
radiator (  P. 4 8 0 )
Condenser (  P. 4 8 0 )
Electric cooling fans
Engine oil filler cap (  P. 4 7 7 )1
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508 6-3. Do-it-yourself maintenance
RX450h_U_OM0E013U Turn the power switch off.
Open the fuse box cover. 
Engine compartment
Push the tab in and lift the lid off. 
Driver’s side instrument panel
Remove the lid.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. 1
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5096-3. Do-it-yourself maintenance
6
Maintenance and care
RX450h_U_OM0E013U 
Luggage compartment (type A fuse box)
Remove the 12-volt battery cover.
(  P. 4 8 3 ) 
Luggage compartment (type B fuse box)
Remove the terminal cover.
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. 3
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1
2

510 6-3. Do-it-yourself maintenance
RX450h_U_OM0E013U ■
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. 5 1 3 )●
If the replaced fuse blows again, have the vehicle inspected by your Lexus dealer. ■
If there is an overload in a circuit
The fuses are designed to blow, protec ting the wiring harness from damage.■
When replacing light bulbs
Lexus recommends that you use genuine Lexu s products designed for this vehicle.
Because certain bulbs are connected to circui ts designed to prevent overload, nongenu-
ine parts or parts not designed for this vehicle may be unusable.
WA R N I N G ■
To 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.●
Never use a fuse of a higher amperage rati ng 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. ■
Fuse box near the power control unit
Never check or replace the fu ses as there are high voltage parts and wiring near the
fuse box.
Doing so may cause electric shock, re sulting in death or serious injury.
NOTICE ■
Before replacing fuses
Have the cause of electrical overload determ ined and repaired by your Lexus dealer as
soon as possible.

5617-2. Steps to take in an emergency
7
When trouble arises
RX450h_U_OM0E013U One of the following may be the cause of the problem: ●
The electronic key may not be functioning properly.
(  P. 5 6 4 )●
There may not be sufficient fuel in the vehicle’s tank.
Refuel the vehicle. ●
There may be a malfunction in the immobilizer system. (  P. 8 5 )●
There may be a malfunction in the steering lock system. ●
The hybrid system may be malfunctioni ng due to an electrical problem such
as electronic key battery depletion or a blown fuse. However, depending on
the type of malfunction, an interim meas ure is available to start the hybrid sys-
tem. (  P. 5 6 2 )
One of the following may be the cause of the problem: ●
The 12-volt battery may be discharged. (  P. 5 6 8 )●
The 12-volt battery terminal connections may be loose or corroded.
(  P. 4 8 3 )If the hybrid system will not start 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. 2 3 2 )
The interior lights and headlights are dim, or the horn does not sound or
sounds at a low volume.

570 7-2. Steps to take in an emergency
RX450h_U_OM0E013U Start the engine of the second vehicle. Increase the engine speed slightly and
maintain at that level for approximately 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 second vehicle and start the hybrid system
of your vehicle by turning the power switch to ON mode.
Make sure the “READY” indicator comes on. If the indicator light 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.
Close the exclusive jump starting terminal cover, and reinstall the fuse box
cover to its original position.
Once the hybrid system starts, have th e vehicle inspected at your Lexus dealer
as soon as possible. ■
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 system while the hybrid system is off. ●
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 th e 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 the 12-volt battery is removed or discharged ●
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. ●
The power back door must be initialized. (  P. 1 5 0 )6
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