2007 Lexus GS350 air conditioning

418
4-3. Do-it-yourself maintenance
FuseAmpereCircuit
24RR J/B80
STOP LP R, STOP LP L, RR-B, 
RR TAIL, RR FOG, RR-IG1, PSB, 
and RR S/SHADE
25GLW PLG150Glow plug heater
26RH J/B-AM80
AM1, OBD, STOP SW, TI&TE, 
PWR OUTLET, FR P/SEAT RH, 
STR LOCK, ECU-IG RH, RH-IG, 
ACC, CIG, SECURITY, 
FR S/HER RH and AIR SUS
27ABS230VSC, ABS
28DEFOG50Rear window defogger, Noise filter
29CDS40F: CDS
30FA N 140Electric cooling fans
31HEATER50Air conditioning system
32GLW PLG250Glow plug heater
33E/G-AM60H-LMP CLN, FR CTRL-AM and 
A/C COMP
34LH J/B-AM80
S/ROOF, FR P/SEAT LH, TV, 
FR S/HTR LH, FR WIP, H-LP LVL,
LH-IG, FUEL OPEN, A/C, PANEL
and LH-B
35FA N 260

419
4-3. Do-it-yourself maintenance
4
Maintenance and care
■Engine compartment (Type B)
6: only for GS430 equipped with ac tive stabilizer suspension system
FuseAmpereCircuit
1FR CTRL-B25Headlight high beam, horn
2A/F15Exhaust system
3ETCS10
Multiport fuel injection system/
sequential multiport fuel injection
system
4ALT-S7. 5 Charging system
5H-LP CLN30Headlight cleaner
6STB-AM30DC/DC converter
7A/C COMP7. 5 Air conditioning system
8DEICER25
9FR CTRL-AM30Front fog lights, parking lights, wind-
shield washer
10IG210Ignition system
11EFI NO.210Fuel system, exhaust system

421
4-3. Do-it-yourself maintenance
4
Maintenance and care
■Driver’s side instrument panel
FuseAmpereCircuit
1FR P/SEAT LH30Power seat system
2A/C7. 5Air conditioning system
3TV7. 5Audio system, Air conditioning sys-
tem, Rear view monitor system
4TRK OPN10Trunk lid opener
5LH-B10Theft deterrent system
6S/ROOF25Moon roof
7PA N E L7. 5
Steering switch illumination, Audio
system, Glove box light, Automatic
transmission selector lever illumina-
tion, Console box light, Adaptive
variable suspension switch illumina-
tion, Cigarette lighter illumination,
Air conditioning system, VSC off
switch illumination, Driving pattern
selector switch, Seat heater or
Heated and ventilated seat switches,
Register ILL RH, Register ILL LH,
Register ILL CTR
8FUEL OPEN10Fuel filler door opener, Trunk lid
opener

424
4-3. Do-it-yourself maintenance
FuseAmpereCircuit
10ACC7. 5
Multiplex communication system,
Smart access system with push-but-
ton start, Rear view monitor system,
Audio system, Air conditioning sys-
tem, Lexus Link System ECU
11CIG15Cigarette lighter
12PWR OUTLET15Po w e r o u t l e t
13AIR SUS20Adaptive variable suspension system
14RR DOOR RH20
Rear right door control system
(Power door lock system, Door cour-
tesy light, Power window)
15FR DOOR RH20
Front right door control system
(Power door lock system, Power rear
view mirror control system, Door
courtesy light, Outside rear view mir-
ror heater, Power window), Multiplex
communication system
16AM215Starting system
17RH-IG7. 5
Seat heater switches, Front right door
control system, Rear right door con-
trol system, Capacitor, Combination
switch, Seat belt pretensioners, Intui-
tive parking assist
18FR S/HTR RH15Seat heaters and ventilators

5
When trouble arises
445
5-1. Essential information
If you think something is wrong
If you notice any of the following symptoms, your vehicle probably needs
adjustment or repair. Contact your Lexus dealer as soon as possible.
■ Visible symptoms
●Fluid leaks under the v
ehicle
(Water dripping from the air conditioning after use is normal.)
● Flat
-looking tires or uneven tire wear
●Engine coolant temper atur
e gauge needle continually points
higher than normal
■ A
udible symptoms
●Changes in e
xhaust sound
● Ex
cessive tire squeal when cornering
●Str
ange noises related to the suspension system
●P
inging or other noises related to the engine
■ Oper
ational symptoms
●Engine mis
sing, stumbling or running rough
●A
ppreciable loss of power
●V
ehicle pulls heavily to one side when braking
●V
ehicle pulls heavily to one side when driving on a level road
● L
oss of brake effectiveness, sp ongy feeling, pedal almost touches
the floor

492
5-2. Steps to take in an emergency
If your vehicle overheats
If your engine overheats:
Stop the vehicle in a safe place and turn off the automatic air
conditioning system.
Check to see if steam is coming out from under the hood.
If you see steam: 
Stop the engine and car efully lif
t the hood.
If you do not see steam: Leave the engine running and carefully lift the hood.
Remove the engine compartment cover. ( P. 3 7 8 )
Check to see if the cooling fan is operating.
If the fan is operating: 
Wait until the engine coolant temperature gauge begins to
fall and then stop the engine.
If the fan is not operating: 
Stop the engine immediately and call y
our local Lexus
dealer.
After the engine has cooled
do
wn sufficiently, check the
coolant level and inspect the
radiator core (radiator) for any
leaks.
STEP1
STEP2
STEP3
STEP4
STEP5

516
6-1. Specifications
Warning: The temperature grades for this tire are established for a tire that
is properly inflated and not overloaded.
Excessive speed, underinflation, or excess iv
e loading, either separately or in
combination, can cause heat buildup and possible tire failure.
Glossary of tire terminology
Tire related termMeaning
Cold tire inflation pres-
sureTire pressure when the vehicle has been parked for
three hours or more, or has not been driven more
than 1 mile or 1.5 km under that condition
Maximum inflation pres-
sureThe maximum cold inflated pressure to which a tire
may be inflated, shown on the sidewall of the tire
Recommended inflation
pressureCold tire inflation pressure recommended by a man-
ufacturer
Accessory weight
The combined weight (in excess of those standard
items which may be replaced) of transmission, power
steering, power brakes, power windows, power seats,
radio and heater, to the extent that these items are
available as factory-installed equipment (whether
installed or not)
Curb weight
The weight of a motor vehicle with standard equip-
ment, including the maximum capacity of fuel, oil and
coolant, and if so equipp ed, air conditioning and
additional weight optional engine
Maximum loaded vehicle
weight
The sum of: 
(a) Curb weight 
(b) Accessory weight
(c) Vehicle capacity weight 
(d) Production options weight
Normal occupant weight150 lb. (68 kg) times the number of occupants speci-
fied in the second column of Table 1
* that follows

532
Alphabetical index
Alphabetical index
A/C (Air conditioning system) ........190
ABS (Anti-lock Brake System) ........ 159
Active stabilizer suspension 
system...................................................... 159
Air conditioning system (A/C) Air conditioning filter ....................... 407
Automatic air conditioning 
system ................................................... 190
Airbags Airbag operating conditions........... 63
Airbag precautions for your 
child.......................................................... 67
Airbag warning light ........................ 450
Curtain shield airbag 
precautions .......................................... 70
Front passenger occupant 
classification system.......................... 72
General airbag precautions ........... 67
Locations of airbags............................ 59
Modification and disposal of 
airbags ...................................................... 71
Side airbag precautions .................... 67
Side and curtain shield airbags 
operating conditions ....................... 63
SRS airbags ............................................. 59
Alarm ............................................................ 54
Antenna ................................................... 208
Armrest ..................................................... 327
Ashtrays .................................................... 320
Audio system Antenna .................................................. 208
Cassette player....................................... 211
CD player/changer ........................... 216
DVD information ............................... 253
DVD player/changer...................... 233
DVD video/audio ............................. 236
MP3/WMA disc ............................... 224Optimal use .........................................
258
Radio ....................................................... 202
Steering switches ............................... 262
Video CD .............................................. 249
Automatic headlight leveling 
system ....................................................... 118
Automatic light control system.......... 116
AVS (Adaptive Variable 
Suspension System) .......................... 158
BA (Brake Assist).................................. 159
Back-up lights Wattage ................................................. 508
Battery Checking............................................... 387
If the vehicle battery is 
discharged .........................................492
Preparing and checking 
before winter.......................................172
Bluetooth
®..............................................265
Brake Fluid .......................................................... 386
Parking brake........................................ 105
Care Exterior ................................................... 358
Interior..................................................... 360
Seat belts ................................................. 361
Cargo capacity....................................... 168
Cargo hooks ............................................ 331
CD player/changer............................. 233
Chains ......................................................... 174
Child-protectors........................................ 18
Child restraint system (CRS)
Definition ................................................... 78
Installation .................................................. 81
A
B
C