2018 Lexus GS450h fuses

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GS450h_OM_OM30G62U_(U)
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6-3. Do-it-yourself maintenanceDo-it-yourself service precautions................................ 349
Hood ................................................ 351
Positioning a floor jack ............ 352
Engine compartment ............... 353
12-volt battery ............................. 362
Tires ................................................. 365
Tire inflation pressure .............. 375
Wheels ........................................... 378
Air conditioning filter ...............380
Electronic key battery.............. 382
Checking and replacing fuses.............................................. 384
Headlight aim (vehicles with single-beam head lights) ...... 389
Light bulbs ......................................391
7-1. Essential information Emergency flashers .................. 396
If your vehicle has to be stopped in an emergency.... 397 7-2. Steps to take in an emergency
If your vehicle needs to be towed ............................... 398
If you think something is wrong................ 403
If a warning light turns on or a warning buzzer sounds .... 404
If a warning message is displayed ................................. 410
If you have a flat tire ....................441
If the hybrid system will not start ............................... 450
If the parking brake cannot be released................................ 452
If the electronic key does not operate properly..................... 454
If the 12-volt battery is discharged............................. 457
If your vehicle overheats...........461
If the vehicle becomes stuck ............................................. 466
7When trouble arises

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GS450h_OM_OM30G62U_(U)
6Maintenance and care
6-1. Maintenance and care Cleaning and protecting the vehicle exterior ................ 336
Cleaning and protecting the vehicle interior..................340
6-2. Maintenance Maintenance requirements ... 343
General maintenance.............. 345
Emission inspection and maintenance (I/M)
programs ....................................348
6-3. Do-it-yourself maintenance Do-it-yourself service precautions................................ 349
Hood ................................................ 351
Positioning a floor jack ............ 352
Engine compartment ...............353
12-volt battery ............................. 362
Tires ................................................. 365
Tire inflation pressure............... 375
Wheels ........................................... 378
Air conditioning filter .............. 380
Electronic key battery ..............382
Checking and replacing fuses ..............................................384
Headlight aim (vehicles with single-beam headlights).......389
Light bulbs...................................... 391

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GS450h_OM_OM30G62U_(U)6-3. Do-it-yourself maintenance
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Maintenance and care
Do-it-yourself service precautions
*: Vehicles with sing le-beam headlights
If you perform maintenance by yourself, be sure to follow the correct proce-
dure as given in these sections.
ItemsParts and tools
12-volt battery con-
dition (→P. 362)•Grease
• Conventional wrench (for terminal clamp bolts)
Brake fluid level
(→ P. 360)
• 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. 358)
•“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 Cool ant” is pre-mixed with 55%
coolant and 45% deionized water.
• Funnel (used only for adding coolant)
Engine oil level
( → P. 355)
• “Toyota Genuine Motor Oil” or equivalent
• Rag or paper towel
• Funnel (used only for adding engine oil)
Fuses ( →P. 384)• Fuse with same amperage rating as original
Headlight aim*
( → P. 389)• Phillips-head screwdriver
Light bulbs
(→ P. 391)
• Bulb with same number and wattage rating as original
• Phillips-head screwdriver•Flathead sc rewdriver
•Wrench
Radiator and con-
denser (→P. 359)⎯
Tire inflation pres-
sure (→P. 375)• Tire pressure gauge• Compressed air source
Washer fluid
(→ P. 361)• Water or washer fluid containing antifreeze (for winter use)
• Funnel (used only for adding water or washer fluid)

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GS450h_OM_OM30G62U_(U)
6-3. Do-it-yourself maintenance
Checking and replacing fuses
Turn the power switch off.
Open the fuse box cover.
Engine compartment
Remove the engine compartment
cover (→P. 354) and remove all of
the clips.
Push the tabs on either side to
detach the lock and lift the lid off
while pulling the lock plate.
When installing the lid, check that the
lock plate and the tabs on either side
are connected correctly.
If any of the electrical components do not operate, a fuse may have blown. If
this happens, check and repl ace the fuses as necessary.
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GS450h_OM_OM30G62U_(U)
6-3. Do-it-yourself maintenance
The upper part of the 12-volt battery
Pull the strap upwards to lift up the
12-volt battery cover.
When one or more of the fuses in this
unit are blown, the unit needs to be
replaced as a whole.
Remove the fuse with the pullout
tool.
Only type A fuse can be removed using
the pullout tool.
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GS450h_OM_OM30G62U_(U)
6-3. Do-it-yourself maintenance
■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. 391)
●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 connected to circui ts designed to prevent overload, non-gen-
uine parts or parts not designed for this vehicle may be unusable.
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.
NOTICE
■Before replacing fuses
Have the cause of electrical overload determined and repaired by your Lexus dealer as
soon as possible.

533Alphabetical index
GS450h_OM_OM30G62U_(U)
Engine switch .......................................... 182Auto power off function................... 184
Changing the power switch modes ................................................... 183
If your vehicle has to be stopped in an emergency .............................397
Starting the hybrid system .............. 182
EPS (Electric Power Steering) ....... 269 Function ..................................................269
Warning light ...................................... 405
Warning message .............................. 410
EV drive mode.........................................187
Event data recorder (EDR) ...................10
First-aid kit storage net ........................313
Flat tire ........................................................441
Floor mats ................................................... 26
Fluid Brake ........................................................ 477
Hybrid transmission.......................... 476
Washer .................................................... 361
Footwell light .......................................... 304
Front passenger occupant classification system ............................ 46
Front personal lights............................305
Front seats .................................................143 Adjustment ............................................. 143
Cleaning ................................................ 340
Correct driving posture .................... 28
Driving position memory ................ 145
Head restraints ..................................... 150
Power easy access system ............ 145
Seat heaters ......................................... 302
Seat position memory....................... 145
Seat ventilators ................................... 302 Front side marker lights..................... 200
Light switch...........................................200
Replacing light bulbs ....................... 393
Welcome light illumination control.................................................... 123
Front turn signal lights .......................... 195 Replacing light bulbs ........... 392, 393
Turn signal lever ...................................195
Wattage ................................................ 480
Fuel............................................................... 213 Capacity..................................................472
Fuel gauge ...............................................88
Information..............................................481
Refueling .................................................. 213
Type...........................................................472
Warning light .......................................406
Warning messages ............................410
Fuel consumption Average fuel consumption ...............97
Average fuel consumption after refueling .......................................97
Current fuel consumption.................97
Fuel filler door.......................................... 213 Refueling .................................................. 213
When the fuel filler door cannot be opened ........................... 215
Fuses.......................................................... 384
Garage door opener............................ 321
Gauges........................................................ 88
Glove box ............................................... 308
Glove box light...................................... 308
F
G

539Alphabetical index
GS450h_OM_OM30G62U_(U)
Radar cruise control (dynamic radar cruise control with
full-speed range) ............................... 243
Radiator .................................................... 359
Radio
*
RBDS (Radio Broadcast Data Systems)
*
Rear air conditioning system ........... 298
Rear door sunshades ........................... 318
Rear personal lights.............................305
Rear side marker lights ......................200 Light switch .......................................... 200
Replacing light bulbs ........................393
Welcome light illumination cont rol ..........................123
Rear seat heaters.................................. 302
Rear sunshade ........................................ 318 Operation ............................................... 318
Reverse operation feature.............. 319
Rear turn signal lights .......................... 195 Replacing light bulbs ........................393
Turn signal lever .................................. 195
Rear view mirror Inside rear view mirror ..................... 154
Outside rear view mirrors .............. 156
Rear view monitor system
*
Rear window defoggers .................... 293
Refueling ....................................................213 Capacity ................................................. 472
Fuel types ............................................... 472
Opening the fuel tank cap...............214
When the fuel filler door cannot be opened .......................... 215 Regenerative braking............................. 67
Remote Touch
*.................................... 282
Replacing Electronic key battery ..................... 382
Fuses ........................................................384
Light bulbs...............................................391
Tires ............................................................ 441
Reporting safety defects for U.S. owners ....................................510
Resetting the message indicating maintenance is required .................344
Rev indicator ............................................. 90
Rev peak ..................................................... 90
Road accident cautions ......................... 72
Seat belts .................................................... 30 Adjusting the seat belt........................ 30
Automatic Locking Retractor .......... 31
Child restraint system installation ............................................. 59
Cleaning and maintaining the seat belt ......................................... 341
Emergency Locking Retractor (ELR) ................................... 31
How to wear your seat belt............. 30
How your child should wear the seat belt ...........................................32
Pregnant women, proper seat belt use ......................................... 33
Reminder light and buzzer ...........406
Seat belt extender .................................32
Seat belt pretensioners........................ 31
SRS warning light .............................. 404
R
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*: Refer to the “NAVIGATION AND MULTIMEDIA SYSTEM OWNER’S MANUAL”.