Page 512 of 1014

4945-2. Using the air conditioning system and defogger
GS450h_300h_OM_OM30D53E_(EE)
Air conditioning odors
During use, various odors from inside and outside the vehicle may enter
into and accumulate in the air conditioning system. This may then cause
odor to be emitted from the vents.
To reduce potential odors from occurring:
• It is recommended that the air conditioning system be set to outside air
mode prior to turning the vehicle off.
• The start timing of the blower may be delayed for a short period of time
immediately after the air conditioning system is started in automatic
mode.
nanoe *1 system (if equipped)
The air conditioning system adopts nanoe generator. This helps to provide
clean air and moisture by emitting electrically charged ions coated with
water particles through the front center vent on driver’s side
*2.
When the fan is turned on and is selected, the nanoe system is acti-
vated.
When the fan is operated in the following conditions, system performance
will be maximized. If the following conditions are not met, performance
will be limited.
• The , or air outlets are being used.
• The front center vent on driver’s side is open.
When nanoe is generated, a small amount of ozone is emitted and may be
faintly smelled in some situations. However, this is approximately the same
as the amount that already exists in nature, such as in forests, and it has no
affect on the human body.
A slight noise may be heard during operation. This is not a malfunction.
*1:nanoe and the nanoe mark are trademarks of Panasonic Corporation.
*2: According to temperature and humidity conditions, fan speed and direc-
tion of the air flow, the nanoe system may not operate at full capacity.
Air conditioning filter
P. 7 7 5
Customization
Settings (e.g. exhaust gas sensor sensitivity) can be changed.
(Customizable features: P. 942)
Page 513 of 1014

4955-2. Using the air conditioning system and defogger
5
Interior features
GS450h_300h_OM_OM30D53E_(EE)
CAUTION
To prevent the windshield from fogging up
Do not use
during cool air operation in extremely humid weather.
The difference between the temperature of the outside air and that of the
windshield can cause the outer surface of the windshield to fog up, block-
ing your vision.
nanoe generator
Do not disassemble or repair the generator because it contains high voltage
parts. Contact any authorized Lexus dealer or repairer, or another duly
qualified and equipped professional if the generator needs repair.
NOTICE
To prevent 12-volt battery discharge
Do not leave the air conditioning system on longer than necessary when the
hybrid system is off.
Humidity sensor
Follow these points to avoid damaging the sensor:
Do not disassemble the sensor
Do not spray the glass cleaner on the sensor or subject it to strong impacts
Do not stick anything on the sensor
To prevent damage to the nanoe
Do not insert anything into the driver’s side vent, attach anything to it, or
use sprays around the driver’s side vent. These things may cause the gener-
ator not to work properly.
Page 746 of 1014

7226-1. Maintenance and care
GS450h_300h_OM_OM30D53E_(EE)
CAUTION
When washing the vehicle
Do not apply water to the inside of the engine compartment. Doing so may
cause the electrical components etc. to catch fire.
When cleaning the windshield (vehicles with rain-sensing windshield wip-
ers)
When the upper part of the windshield where the raindrop sensor is
located is touched by hand
When a wet rag or similar is held close to the raindrop sensor
If something bumps against the windshield
If you directly touch the raindrop sensor body or if something bumps into
the raindrop sensor
Precautions regarding the exhaust pipes
Exhaust gases cause the exhaust pipes to become quite hot.
When washing the vehicle, be careful not to touch the pipes until they have
cooled sufficiently, as touching hot exhaust pipes can cause burns.
Precaution regarding the rear bumper with Blind Spot Monitor (if equipped)
If the paint of the rear bumper is chipped or scratched, the system may mal-
function. If this occurs, consult any authorized Lexus dealer or repairer, or
another duly qualified and equipped professional.
Turn off AUTO mode of the wiper to
prevent the wiper from operating. (P.
285)
If AUTO mode is selected, the wipers
may operate unexpectedly in the follow-
ing situations, and may result in hands
being caught or other serious injuries and
dtthibld
Page 751 of 1014
7276-1. Maintenance and care
6
Maintenance and care
GS450h_300h_OM_OM30D53E_(EE)
NOTICE
When cleaning the inside of the windshield (vehicles with LKA [Lane-
Keeping Assist])
Be careful not to touch the camera sensor (P. 338).
If the camera is accidentally scratched or hit, LKA may not operate prop-
erly or may cause a malfunction.
Cleaning the inside of the rear window
Do not use glass cleaner to clean the rear window, as this may cause dam-
age to the rear window defogger heater wires or antenna. Use a cloth
dampened with lukewarm water to gently wipe the window clean. Wipe
the window in strokes running parallel to the heater wires or antenna.
Be careful not to scratch or damage the heater wires or antenna.
Page 811 of 1014
787 6-3. Do-it-yourself maintenance
6
Maintenance and care
GS450h_300h_OM_OM30D53E_(EE)
Engine compartment
Fuse layout and amperage ratings
FuseAmpereCircuit
1IGN10Starting system
2INJ10Multiport fuel injection system/sequen-
tial multiport fuel injection system
3EFI NO.210Air intake system, exhaust system
4IG2 MAIN20IGN, GAUGE, INJ, AIR BAG, IG2
NO.1, LH-IG2
5EFI MAIN25
Multiport fuel injection system/sequen-
tial
multiport fuel injection system, EFI
NO.2
6A/F15Air flow sensor
7EDU20Multiport fuel injection system/sequen-
tial multiport fuel injection system
Page 813 of 1014

789 6-3. Do-it-yourself maintenance
6
Maintenance and care
GS450h_300h_OM_OM30D53E_(EE)
31IGCT NO.57.5Power management system, shift posi-
tion sensor
32WIP-S7.5Windshield wipers, driver support sys-
tem
33WA S H - S5Windshield washer, driver support sys-
tem
34COMB SW5Windshield wipers
35DOME7.5
Personal lights, ornament lights, trunk
light,
footwell lights, door courtesy lights, van-
ity
lights, rear door inside handle illumina-
tions,
power trunk lid
36MPX-B10
Body ECU, smart entry & start system,
electric tilt and telescopic steering col-
umn, power seats, head-up display, front
door ECU, gauges and meters, steering
sensor, yaw rate and G sensor, overhead
module, RR CTRL SW, power trunk lid,
clock, CAN gateway ECU
37IGCT NO.410Power control unit
38IGCT NO.37.5Hybrid battery (traction battery), DC/DC
converter
39IGCT NO.25Hybrid system
40IG2 NO.15DCM, CAN gateway ECU
41GAUGE5Gauges and meters
42EPS*280Electric power steering
43DC/DC150RH-J/B DC/DC, P/I DC/DC,
LH-J/B DC/DC, LUG-J/B DC/DC
44P/I DC/DC100RR S/SHADE, DEFOG, FOG, TAIL,
PA N E L
45RH J/B DC/DC80Right-hand junction block
FuseAmpereCircuit
Page 816 of 1014
7926-3. Do-it-yourself maintenance
GS450h_300h_OM_OM30D53E_(EE)
Left side instrument panel
Left-hand drive vehicles
FuseAmpereCircuit
1STOP7.5Stop lights, high mounted stoplight
2P/W-B5Power window master switch
3P/SEAT1 F/L30Power seats
4D/L NO.125Power door lock system
5NV-IR10Lexus night view
6FL S/HTR10Seat heaters/ventilators
7WIPER30Windshield wipers
8WIPER-IG5Windshield wipers
9LH-IG10
Seat belts, body ECU, AFS, overhead
module, raindrop sensor, inside rear view
mirror, lane camera sensor (LKA), head-
up display, shift lock system, Lexus
parking assist-sensor, front left-hand
door ECU, driver monitor system,
Remote Touch screen, electric tilt and
telescopic steering column, power seats,
moon roof, windshield wiper de-icer,
Lexus parking assist-sensor switch, PTC
heater, headlight cleaner
Page 817 of 1014
793 6-3. Do-it-yourself maintenance
6
Maintenance and care
GS450h_300h_OM_OM30D53E_(EE)
10LH ECU-IG10
VDIM, brake system, D-SW MODULE
(Blind Spot Monitor, heated steering
wheel), driver support system, AFS,
electric cooling fans, EPB, air condition-
ing system, steering sensor
11DOOR FL30Outside rear view mirror defoggers,
power window (front left-hand)
12CAPACITOR
(HV)10Capacitor
13STRG LOCK15Steering lock system
14D/L NO.225Power door lock system
15DOOR RL30Power window (rear left-hand)
16HAZ15Turn signal lights, emergency flashers
17LH-IG210
Multiport fuel injection system/sequen-
tial multiport fuel injection system, stop
lights, smart entry & start system, steer-
ing lock system, brake system, power
management system
18LH J/B-B7.5Body ECU
19S/ROOF20Moon roof
20P/SEAT2 F/L25Power seats
21TI & TE20Electric tilt and telescopic steering col-
umn
22A/C7.5Air conditioning system
FuseAmpereCircuit