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349
GS450h_OM_OM30E99U_(U)6-3. Do-it-yourself maintenance
6
Maintenance and care
Engine compartment
■12-volt battery
P. 3 5 8
Engine oil level dipstick
(P. 3 5 1 )
Engine coolant reservoir (P. 3 5 4 )
Engine oil filler cap ( P. 3 5 2 )
Power control unit coolant
reservoir ( P. 3 5 4 ) Brake fluid reservoir
(P. 3 5 6 )
Fuse box ( P. 3 7 9 )
Wa s h e r f l u i d t a n k ( P. 3 5 7 )
Electric cooling fans
Condenser ( P. 3 5 5 )
Radiator ( P. 3 5 5 )1
2
3
4
5
6
7
8
9
10
Page 379 of 544
379
GS450h_OM_OM30E99U_(U)6-3. Do-it-yourself maintenance
6
Maintenance and care
Checking and replacing fuses
Turn the power switch off.
Open the fuse box cover.
Engine compartment
Remove the engine compartment
cover ( P. 350) 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 li d, 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 replace the fuses as necessary.
1
2
Page 382 of 544
382
GS450h_OM_OM30E99U_(U)
6-3. Do-it-yourself maintenance
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.
Ty p e C a n d D :
Contact your Lexus dealer.
4
1
2
Ty p e ATy p e B
Ty p e CTy p e D
Page 383 of 544

GS450h_OM_OM30E99U_(U)
3836-3. Do-it-yourself maintenance
6
Maintenance and care
■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. 3 8 6 )
●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, protecting the wiring harness from damage.
■When replacing light bulbs
Lexus recommends that you use genuine Le xus products designed for this vehicle.
Because certain bulbs are connected to circuits designed to prevent overload, non-gen-
uine 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.
NOTICE
■Before replacing fuses
Have the cause of electrical overload determ ined and repaired by your Lexus dealer as
soon as possible.
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453
GS450h_OM_OM30E99U_(U)
7
When trouble arises
7-2. Steps to take in an emergency
If the 12-volt battery is discharged
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 by following the steps below.
Confirm that the electronic key is
being carried.
When connecting the jumper (or
booster) cables, depending on the situa-
tion, the alarm may activate and doors
locked. ( P. 7 8 )
Open the hood ( P. 3 4 7 ) , r e m o v e
the engine compartment covers
( P. 350) and open the fuse box
cover.
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.
Open the exclusive jump starting
terminal cover.
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.
1
2
1
2
3
Page 529 of 544

529Alphabetical index
GS450h_OM_OM30E99U_(U)
Engine switch .......................................... 180Auto power off function................... 182
Changing the power switch modes ..................................................... 181
If your vehicle has to be stopped in an emergency .............................393
Starting the hybrid system ..............180
EPS (Electric Power Steering) ....... 267 Function .................................................. 267
Warning light ........................................ 401
Warning message ............................ 406
EV drive mode........................................ 185
Event data recorder (EDR) ...................10
First-aid kit storage net ......................... 311
Flat tire ...................................................... 437
Floor mats ................................................... 26
Fluid Brake ........................................................ 473
Hybrid transmission.......................... 472
Washer ...................................................357
Footwell light .......................................... 302
Front passenger occupant classification system ............................ 46
Front personal lights............................ 303
Front seats .................................................. 141 Adjustment ............................................... 141
Cleaning .................................................336
Correct driving posture .................... 28
Driving position memory ................ 143
Head restraints ..................................... 148
Power easy access system ............ 143
Seat heaters ......................................... 300
Seat position memory....................... 143
Seat ventilators ................................... 300 Front side marker lights....................... 197
Light switch............................................. 197
Replacing light bulbs ...................... 388
Welcome light illumination control......................................................121
Front turn signal lights .......................... 192 Replacing light bulbs .......... 387, 388
Turn signal lever ................................... 192
Wattage ..................................................477
Fuel............................................................... 210 Capacity .................................................468
Fuel gauge ............................................... 86
Information............................................ 478
Refueling ..................................................210
Type..........................................................468
Warning light ....................................... 402
Warning messages ..........................406
Fuel consumption Average fuel consumption .............. 95
Average fuel consumption after refueling ...................................... 95
Current fuel consumption................ 95
Fuel filler door.......................................... 210 Refueling ..................................................210
When the fuel filler door cannot be opened ........................... 212
Fuses...........................................................379
Garage door opener............................ 319
Gauges........................................................ 86
Glove box ............................................... 306
Glove box light...................................... 306
F
G