display Lexus GS250 2012 Owner's Manual

677 6-3. Do-it-yourself maintenance
6
Maintenance and care
GS350/250_EE (OM30C36E)
When to replace your vehicle’s tires
Tires should be replaced if:
You have tire damage such as cuts, splits, cracks deep enough to expose the
fabric, and bulges indicating internal damage
A tire goes flat repeatedly or cannot be properly repaired due to the size or
location of a cut or other damage
If you are not sure, consult with any authorized Lexus dealer or repairer, or
another duly qualified and equipped professional.
Replacing tires and wheels (vehicles with the tire pressure warning system)
If the ID code of the tire pressure warning valve and transmitter is not regis-
tered, the tire pressure warning system will not work properly. After driving
for about 10 minutes, the tire pressure warning light blinks for 1 minute and
stays on to indicate a system malfunction.
Tire life
Any tire over 6 years old must be checked by a qualified technician even if it
has seldom or never been used or damage is not obvious.
Routine tire inflation pressure checks
The tire pressure warning system does not replace routine tire inflation pres-
sure checks. Make sure to check tire inflation pressure as part of your routine
of daily vehicle checks.
When rotating the tires (vehicles with the tire pressure warning system featur-
ing a tire inflation pressure display function)
Make sure that the engine switch is off. If the tires are rotated while the
engine switch is in IGNITION ON mode, the tire position information will
not be updated.
If this accidentally occurs, either turn the engine switch to off and then to
IGNITION ON mode, or initialize the system after checking that the tire
pressure is properly adjusted.

6786-3. Do-it-yourself maintenance
GS350/250_EE (OM30C36E)
Low profile tires (except 225/50R17 tires)
Generally, low profile tires will wear more rapidly and tire grip performance
will be reduced on snowy and/or icy roads when compared to standard tires.
Be sure to use snow tires or tire chains
* on snowy and/or icy roads and drive
carefully at a speed appropriate for road and weather conditions.
*: Tire chains cannot be mounted on the 19-inch tires. Snow tires should be
used instead.
If the tread on snow tires wears down below 4 mm (0.16 in.)
The effectiveness of the tires as snow tires is lost.
Situations in which the tire pressure warning system may not operate properly
(vehicles with the tire pressure warning system)
In the following cases, the tire pressure warning system may not operate
properly.
• If non-genuine Lexus wheels are used.
• A tire has been replaced with a tire that is not an OE (Original Equip-
ment) tire.
• A tire has been replaced with a tire that is not of the specified size.
• Tire chains etc. are equipped.
• Lock nuts are equipped.
• An auxiliary-supported run-flat tire is equipped.
• If a window tint that affects the radio wave signals is installed.
• If there is a lot of snow or ice on the vehicle, particularly around the
wheels or wheel housings.
• If the tire inflation pressure is extremely higher than the specified level.
• If the spare tire is in a location subject to poor radio wave signal recep-
tion.
*
• If a large metallic object which can interfere with signal reception is put
in the trunk.
*
*
: Vehicles with a full-size spare tire only
Performance may be affected in the following situations.
• Near a TV tower, electric power plant, gas station, radio station, large
display, airport or other facility that generates strong radio waves or elec-
trical noise
• When carrying a portable radio, cellular phone, cordless phone or other
wireless communication device
Vehicles with the tire inflation pressure display function: If tire position
information is not correctly displayed due to the radio wave conditions, the
display may be corrected by driving and changing the radio wave condi-
tions.

6886-3. Do-it-yourself maintenance
GS350/250_EE (OM30C36E)
CAUTION
Caution regarding interference with electronic devices (vehicles with the
tire pressure warning system featuring a tire inflation pressure display func-
tion)
Users of any electrical medical device other than implanted pacemakers
and implanted cardiac defibrillators should consult the manufacturer of
the device for information about its operation under the influence of radio
waves.
Radio waves could have unexpected effects on the operation of such med-
ical devices.
People with implanted pacemakers or
cardiac defibrillators should not come
within 450mm (17.7 in.) of the tire
pressure warning system initiators. The
radio waves may affect the operation of
such devices.

7066-3. Do-it-yourself maintenance
GS350/250_EE (OM30C36E)
8MPX-B10
Smart entry & start system, electric tilt
and telescopic steering column, power
seats, head-up display, front right-hand
door ECU, gauges and meters, steering
sensor, yaw rate and G sensor, overhead
module, front left-hand door ECU,
power trunk lid, RR CTRL SW, clock,
body ECU, CAN gateway ECU
9DOME7.5
Personal lights, ornament lights, trunk
light, footwell lights, door courtesy
lights, vanity lights, rear door inside han-
dle illuminations, power trunk lid
10EPS80EPS
11ARS80No circuit
12HTR50Air conditioning system
13ABS NO.140VDIM
14LUG J/B ALT50Luggage compartment junction block
15PTC NO.150PTC heater
16PTC NO.250PTC heater
17ABS NO.250VDIM
18ST30Starting system
19H-LP LO30Headlights, H-LP RLY
20D/C CUT30DOME, MPX-B
21DCM7.5DCM
22ECU-B7.5Smart entry & start system
23ALT-S7.5Charging system
FuseAmpereCircuit

709 6-3. Do-it-yourself maintenance
6
Maintenance and care
GS350/250_EE (OM30C36E)
16MPX-B10
Smart entry & start system, electric tilt
and telescopic steering column, power
seats, head-up display, front right-hand
door ECU, gauges and meters, steering
sensor, yaw rate and G sensor, overhead
module, front left-hand door ECU,
power trunk lid, clock, body ECU, RR
CTRL SW, CAN gateway ECU
17FILTER10Condenser
18A/C COMP7.5Air conditioning system
19H-LP CLN30Headlight cleaner
20FAN NO.240Electric cooling fans
21LH J/B ALT60Left-hand junction block
22FAN NO.180Electric cooling fans
23P/I-B NO.150H-LP HI RH, H-LP HI LH, DRL, emer-
gency brake signal
24EPB30Parking brake
25LUG J/B-B40Luggage compartment junction block
26R/B-B20EPS-B, TV
27HORN10Horn
28ETCS10Multiport fuel injection system/sequen-
tial multiport fuel injection system
29ALT-S7.5Charging system
30ECU-B7.5Smart entry & start system
31DCM7.5DCM
32D/C CUT30DOME, MPX-B
33ABS NO.250VDIM
34ST30Starting system
35H-LP LO30Headlights, H-LP RLY
FuseAmpereCircuit

7126-3. Do-it-yourself maintenance
GS350/250_EE (OM30C36E)
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-IR10No circuit
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, Lexus parking assist-sensor
switch

717 6-3. Do-it-yourself maintenance
6
Maintenance and care
GS350/250_EE (OM30C36E)
11DOOR RR30Power window (rear right-hand)
12RAD NO.230Audio system
13AM27.5Smart entry & start system
14MULTIMEDIA10Navigation system, Remote Touch
15RAD NO.130Audio system
16AIR BAG10SRS airbag system
17OBD7.5On-board diagnosis system
18ACC7.5
Body ECU, head-up display, RR CTRL,
navigation system, transmission, Remote
Touch, DCM, Remote Touch screen
FuseAmpereCircuit

7186-3. Do-it-yourself maintenance
GS350/250_EE (OM30C36E)
Right-hand drive vehicles
FuseAmpereCircuit
1STOP7.5Stop lights, high mounted stoplight
2P/SEAT1 F/R30Power seats
3FR P/OUTLET15Power outlet (front)
4P/W-B5Power window master switch
5RR P/OUTLET15Power outlet (rear)
6P/SEAT2 F/R25Power seats
7AV S20AV S
8WIPER30Windshield wipers
9WA S H20Windshield washer
10RH ECU-IG10
Navigation system, VDIM, D-SW
MODULE (Blind Spot Monitor, heated
steering wheel)
11RH-IG10
Tension reducer, AWD system, power
seats, head-up display, front right-hand
door ECU, nanoe, shift lock system,
electric tilt and telescopic steering col-
umn, seat heater/ventilator switches,
smart entry & start system antennas, tire
pressure warning system receiver, driver
monitor system
12DOOR FR30
Front right-hand door control system
(outside rear view mirror defoggers,
power window)

719 6-3. Do-it-yourself maintenance
6
Maintenance and care
GS350/250_EE (OM30C36E)
13DOOR RR30Power window (rear right-hand)
14RAD NO.230Audio system
15STRG LOCK15Steering lock system
16MULTIMEDIA10Navigation system, Remote Touch
17RAD NO.130Audio system
18AIR BAG10SRS airbag system
19OBD7.5On-board diagnosis system
20TI & TE20Electric tilt and telescopic steering col-
umn
21ACC7.5
Body ECU, head-up display, RR CTRL,
navigation system, transmission, Remote
Touch, Remote Touch screen
FuseAmpereCircuit

737
7When trouble arises
GS350/250_EE (OM30C36E)
7-1. Essential information
Emergency flashers ........... 738
If your vehicle
has to be stopped
in an emergency .............. 7397-2. Steps to take in an emergency
If your vehicle needs
to be towed ..................... 740
If you think something
is wrong .......................... 747
Fuel pump shut off system 748
If a warning light turns on or
a warning buzzer sounds 749
If a warning message
is displayed ..................... 757
If you have a flat tire (vehicles
with a spare tire) ............. 782
If you have a flat tire (vehicles
without a spare tire) ........ 797
If the engine will not start . 815
If the shift lever cannot be
shifted from P ................. 817
If the parking brake
cannot be released........... 818
If the electronic key does not
operate properly .............. 821
If the vehicle battery
is discharged ................... 824
If your vehicle overheats .. 829
If the vehicle
becomes stuck................. 832