fuse Lexus GS450h 2018 Owner's Manual / LEXUS 2018 GS450H OWNER'S MANUAL (OM30G62U)

5
1
8 7
6
5
4
3
2
GS450h_OM_OM30G62U_(U)
9
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

316
GS450h_OM_OM30G62U_(U)
5-5. Using the other interior features
■120 V AC (if equipped for rear only)
Open the lid.
■The power outlets can be used when
12 V: The power switch is in ACCESSORY or ON mode.
120 V AC: The power switch is in ON mode.
NOTICE
●To avoid damaging the power outlets, close the power outlet lids when the power out-
lets are not in use.
Foreign objects or liquids that enter the power outlets may cause a short circuit.
●120 V AC: To prevent blown fuse, do not use a 120 V AC appliance that requires
more than 100W. If a 120 V AC appliance that consumes more than 100 W is used,
the protection circuit will cut the power supply.
●To prevent 12-volt battery discharge, do not use the power outlets longer than neces-
sary when the hybrid system is off.
●Appliances that may not operate properly (120 V AC)
The following 120 V AC appliances may not operate properly even if their power
consumption is under 100 W:
• Appliances with high initial peak wattage
• Measuring devices that process precise data
• Other appliances that require an extremely stable power supply

335
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

349
GS450h_OM_OM30G62U_(U)6-3. Do-it-yourself maintenance
6
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)

353
GS450h_OM_OM30G62U_(U)6-3. Do-it-yourself maintenance
6
Maintenance and care
Engine compartment
■12-volt battery
→ P. 362
Engine oil level dipstick
(→P. 355)
Engine coolant reservoir (→P. 358)
Engine oil filler cap (→ P. 356)
Power control unit coolant
reservoir ( →P. 358) Brake fluid reservoir
(→P. 360)
Fuse box ( →P. 384)
Washer fluid tank ( →P. 361)
Electric cooling fans
Condenser ( →P. 359)
Radiator (→ P. 359)1
2
3
4
5
6
7
8
9
10

384
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.
1
2

386
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.
3

GS450h_OM_OM30G62U_(U)
3876-3. Do-it-yourself maintenance
6
Maintenance and care
Check if the fuse is blown.Normal fuse
Blown fuse
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 and D:
Contact your Lexus dealer.
4
1
2
Type AType B
Type CType D

388
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.

450
GS450h_OM_OM30G62U_(U)
7-2. Steps to take in an emergency
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. 455)
●There may not be sufficient fuel in the vehicle’s tank.
Refuel the vehicle.
●There may be a malfunction in the immobilizer system. ( →P. 74)
●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. 451)
One of the following may be the cause of the problem:
●The 12-volt battery may be discharged. ( →P. 457)
●The 12-volt battery terminal connections may be loose or corroded.
(→ P. 362)
One of the following may be the cause of the problem:
●The 12-volt battery may be discharged. ( →P. 457)
●One or both of the 12-volt battery terminals may be disconnected. ( →P. 362)
Contact your Lexus dealer if the problem cannot be repaired, or if repair procedures
are unknown.
Reasons for the hybrid system not star ting vary depending on the situation.
Check the following and perform the appropriate procedure:
The hybrid system will not start even though the correct starting proce-
dure is being followed. ( →P. 182)
The interior lights and headlights are d im, 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.