2014 Lexus GS250 light

4706-3. Do-it-yourself maintenance
GS350_250_OM_OM30E16E_(EE)
Press and hold the tire pres-
sure warning reset switch until
the tire pressure warning light
blinks slowly 3 times.
Wait for a few minutes with the engine switch in IGNITION ON
mode and then turn the engine switch off.
◆Registering ID codes
The tire pressure warning valve and transmitter is equipped with a
unique ID code. When replacing a tire pressure warning valve and
transmitter, it is necessary to register the ID code. Have the ID code
registered by any authorized Lexus dealer or repairer, or another duly
qualified and equipped professional.
4
5
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471 6-3. Do-it-yourself maintenance
6
Maintenance and care
GS350_250_OM_OM30E16E_(EE)
■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 loca-
tion 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 wi th the tire pressure warning system)
If the ID code of the tire pressure warning valve and transmitter is not registered, the
tire pressure warning system will not work properly. After driving for about 10 min-
utes, the tire pressure warning light blinks for 1 minute and stays on to indicate a sys-
tem malfunction.
■Tire life
Any tire over 6 years old must be checked by a qualified technician even if it has sel-
dom 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 pressure
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 featuring 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.
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473 6-3. Do-it-yourself maintenance
6
Maintenance and care
GS350_250_OM_OM30E16E_(EE)
■The initialization operation (vehicles with the tire pressure warning system)
●Make sure to carry out initialization after adjusting the tire inflation pressure.
Also, make sure the tires are cold before carrying out initialization or tire inflation
pressure adjustment.
●If you have accidentally turned the engine switch off during initialization, it is not
necessary to press the reset switch again as initialization will restart automatically
when the engine switch has been turned to IGNITION ON mode for the next time.
●If you accidentally press the reset switch when initialization is not necessary, adjust
the tire inflation pressure to the specifie d level when the tires are cold, and conduct
initialization again.
■Warning performance of the tire pressure warning system (if equipped)
The warning of the tire pressure warning system will change in accordance with the
conditions under which it was initialized. For this reason, the system may give a warn-
ing even if the tire pressure does not reach a low enough level, or if the pressure is
higher than the pressure that was adjusted to when the system was initialized.
■When initialization of the tire pressure warning system has failed (vehicles with the
tire pressure warning system)
Initialization can be completed in a few minutes. However, in the following cases, the
settings have not been recorded and the system will not operate properly. If
repeated attempts to record tire inflation pressure settings are unsuccessful, have
the vehicle inspected by any authorized Lexus dealer or repairer, or another duly
qualified and equipped professional.
●When operating the tire pressure warning reset switch, the tire pressure warning
light does not blink 3 times.
●After carrying out the initialization procedure, the tire pressure warning light blinks
for 1 minute then stays on after driving for 20 minutes.
■Registering ID codes (vehicles with the tire pressure warning system)
The ID codes of the tire pressure warning valve and transmitters for two sets of
wheels can be registered.
It is not necessary to register the ID codes when replacing normal tires with snow
tires, if the ID codes for the wheels of both normal tires and snow tires are registered
beforehand.
For information about changing ID codes, ask any authorized Lexus dealer or
repairer, or another duly qualified and equipped professional.
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4806-3. Do-it-yourself maintenance
GS350_250_OM_OM30E16E_(EE)
CAUTION
■When inspecting or replacing tires
Observe the following precautions to prevent accidents.
Failure to do so may cause damage to parts of the drive train as well as dangerous
handling characteristics, which may lead to an accident resulting in death or seri-
ous injury.
●Do not mix tires of different makes, models or tread patterns.
Also, do not mix tires of remarkably different treadwear.
●Do not use tire sizes other than those recommended by Lexus.
●Do not mix differently constructed tires (radial, bias-belted or bias-ply tires).
●Do not mix summer, all season and snow tires.
●Do not use tires that have been used on another vehicle.
Do not use tires if you do not know how they were used previously.
●Vehicles with a compact spare tire: Do not tow if your vehicle has a compact
spare tire installed.
●Vehicles with an emergency tire puncture repair kit (if equipped): Do not tow
anything if a tire that has been repaired using the emergency tire puncture repair
kit is installed. The load on the tire may cause unexpected damage to the tire.
■When initializing the tire pressure warning system (vehicles with the tire pressure
warning system)
Do not operate the tire pressure warning reset switch without first adjusting the tire
inflation pressure to the specified level. Otherwise, the tire pressure warning light
may not come on even if the tire inflation pressure is low, or it may come on when
the tire inflation pressure is actually normal.
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4986-3. Do-it-yourself maintenance
GS350_250_OM_OM30E16E_(EE)
8MPX-B10
Smart entry & start system, CAN gateway
ECU, electric tilt and telescopic steering col-
umn, power seats, head-up display, front
right-hand door ECU, gauges and meters,
steering sensor, yaw rate and G sensor, over-
head module, RR CTRL SW, clock, front left-
hand door ECU, power trunk lid, body ECU
9DOME7. 5
Personal lights, ornament lights, trunk light,
footwell lights, door courtesy lights, vanity
lights, rear door inside handle 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 C UT30DOME, MPX-B
21DCM7. 5DCM
22ECU-B7. 5Smart entry & start system
23ALT-S7. 5Charging system
FuseAmpereCircuit
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499 6-3. Do-it-yourself maintenance
6
Maintenance and care
GS350_250_OM_OM30E16E_(EE)
24ETCS10Multiport fuel injection system/sequential
multiport fuel injection system
25HORN10Horn
26R/B-B20EPS-B, TV
27P/ I - B N O.150Headlights, daytime running lights, EBS
28EPB30Pa r k in g b ra ke
29LUG J/B-B40Luggage compartment junction block
30FAN NO.180Electric cooling fans
31LH J/B ALT60Left-hand junction block
32H-LP CLN30Headlight cleaner
33FAN NO.240Electric cooling fans
34A/C COMP7. 5Air conditioning system
35FILTER10Condenser
FuseAmpereCircuit
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5006-3. Do-it-yourself maintenance
GS350_250_OM_OM30E16E_(EE)
XRight-hand drive vehicles
FuseAmpereCircuit
1RH J/B ALT80Right-hand junction block
2P/ I A LT100RR DEF, TAIL, FR FOG, DEICER, PANEL,
RR S/SHADE
3ALT150RH J/B ALT, P/I ALT, alternator, LH J/B ALT,
luggage compartment junction block
4P/ I - B N O. 280F/PMP, EFI MAIN, A/F HTR, EDU, IG2
MAIN
5RH J/B-B40Right-hand junction block
6VG RS40No circuit
7LH J/B-B40Left-hand junction block
8PTC NO.250PTC heater
9PTC NO.150PTC heater
10LUG J/B ALT50Luggage compartment junction block
11ABS NO.140VDIM
12HTR50Air conditioning system
13ARS80No circuit
14EPS80EPS
15DOME7. 5
Personal lights, ornament lights, trunk light,
footwell lights, door courtesy lights, vanity
lights, rear door inside handle illuminations,
power trunk lid
GS350_250_OM_OM30E16E_(EE).book Page 500 Tuesday, July 8, 2014 7:11 PM

501 6-3. Do-it-yourself maintenance
6
Maintenance and care
GS350_250_OM_OM30E16E_(EE)
16MPX-B10
Smart entry & start system, CAN gateway
ECU, electric tilt and telescopic steering col-
umn, power seats, head-up display, front
right-hand door ECU, gauges and meters,
steering sensor, yaw rate and G sensor, over-
head module, RR CTRL SW, clock, front left-
hand door ECU, power trunk lid, body 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 N O.150H-LP HI RH, H-LP HI LH, DRL, emergency
brake signal
24EPB30Pa r k in g b ra ke
25LUG J/B-B40Luggage compartment junction block
26R/B-B20EPS-B, TV
27HORN10Horn
28ETCS10Multiport fuel injection system/sequential
multiport fuel injection system
29ALT-S7. 5Charging system
30ECU-B7. 5Smart entry & start system
31DCM7. 5DCM
32D/C C UT30DOME, MPX-B
33ABS NO.250VDIM
34ST30Starting system
35H-LP LO30Headlights, H-LP RLY
FuseAmpereCircuit
GS350_250_OM_OM30E16E_(EE).book Page 501 Tuesday, July 8, 2014 7:11 PM