engine Lexus GS350 2015 TIPS FOR THE NAVIGATION SYSTEM / LEXUS 2015 GS350 FROM MAR. 2015 PROD. OWNERS MANUAL (OM30F69U)

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4076-3. Do-it-yourself maintenance
6
Maintenance and care
If any washer does not work or the
warning message appears on the
multi-information display, the
washer tank may be empty. Add
washer fluid.
Wa s h e r f l u i d
CAUTION
■When adding washer fluid
Do not add washer fluid when the engine is hot or running as washer fluid contains
alcohol and may catch fire if spilled on the engine etc.
NOTICE
■Do not use any fluid other than washer fluid
Do not use soapy water or engine antifreeze instead of washer fluid.
Doing so may cause streaking on the vehicle’s painted surfaces.
■Diluting washer fluid
Dilute washer fluid with water as necessary.
Refer to the freezing temperatures listed on the label of the washer fluid bottle.

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4116-3. Do-it-yourself maintenance
6
Maintenance and care
■How to initialize the tire pressure warning systemPark the vehicle in a safe place and turn the engine switch off.
Initialization cannot be performed while the vehicle is moving.
Adjust the tire inflation pressure to the specified cold tire inflation
pressure level. ( P. 541)
Make sure to adjust the tire pressure to the specified cold tire inflation pres-
sure level. The tire pressure warning sy stem will operate based on this pressure
level.
Turn the engine switch to IGNITION ON mode.
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 th e engine switch in IGNITION ON
mode and then turn the engine switch off.
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6-3. Do-it-yourself maintenance
◆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 your Lexus dealer.
■When to replace your vehicle’s tires
Tires should be replaced if:
●The treadwear indicators are showing on a tire.
●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, consul t with your Lexus dealer.
■Replacing tires and wheels
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 20 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 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 posi tion information will not be updated.
If this accidentally occurs, either turn th e 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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6-3. Do-it-yourself maintenance
■If the tread on snow tires wears down below 0.16 in. (4 mm)
The effectiveness of the tires as snow tires is lost.
■Situations in which the tire pressure warning system may not operate properly
●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 Equipment) 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.
●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 electrical noise
• When carrying a portable radio, cellular phone, cordless phone or other wire- less communication device
Vehicles with the tire inflation pressure display function: If tire position information
is not correctly disp layed due to the radio wave conditions, the display may be
corrected by driving and changing the radio wave conditions.
●When the vehicle is parked, the time taken for the warning to start or go off could
be extended.
●When tire inflation pressure declines rapi dly for example when a tire has burst, the
warning may not function.
■The initialization operation
●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 sw itch 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 specified level when the tires are cold, and conduct
initialization again.

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GS350_OM_OM30F69U_(U)6-3. Do-it-yourself maintenance
6
Maintenance and care
Air conditioning filter
Turn the engine switch off.
Open the glove box. Lift up the
side with the stay, disconnect the
stay tabs and remove the parti-
tion by pulling horizontally.
Press the tabs and remove the fil-
ter cover.
Press the tabs and remove the fil-
ter case.
The air conditioning filter must be changed regularly to maintain air
conditioning efficiency.
Removal method
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Maintenance and care
Checking and replacing fuses
Turn the engine switch off.
After a system failure, see “Fuse la yout and amperage ratings” for
details about which fuse to check. ( P. 430)
Open the Fuse box cover.
Engine compartment (type A fuse box)
Push the tab in and lift the lid off.
Engine compartment (type B fuse box)
Push the tab in and lift the lid off.
If any of the electrical components do not operate, a fuse may have
blown. If this happens, check and replace the fuses as necessary.
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6-3. Do-it-yourself maintenance
■Engine compartment (type A fuse box)
Fuse layout and amperage ratings
FuseAmpereCircuit
1LH J/B-B40Left-hand junction block
2VGRS40VGRS
3RH J/B-B40Right-hand junction block
4P/ I - B N O. 280F/PMP, EFI MAIN, A/F HTR, EDU, IG2
MAIN
5ALT150RH J/B ALT, P/I ALT, LH J/B ALT, LUG J/B
ALT
6P/ I A LT100RR DEF, TAIL, FR FOG, DEICER, PANEL,
RR S/SHADE
7RH J/B ALT80Right-hand junction block
8MPX-B10
Smart access system with push-button start,
CAN gateway ECU, electric tilt and tele-
scopic steering column, power seats, head-
up display, front right-hand door ECU,
gauges and meters, steering sensor, yaw rate
and G sensor, overhead module, RR CTRL
SW, clock, front left-hand door ECU, power
trunk lid, body ECU

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6-3. Do-it-yourself maintenance
■Engine compartment (type B fuse box)
33FAN NO.240Electric cooling fans
34A/C COMP7. 5Air conditioning system
35FILTER10Condenser
FuseAmpereCircuit
FuseAmpereCircuit
1IGN10Starting system
2INJ10Multiport fuel injection system/sequential
multiport fuel injection system
3EFI NO.210Fuel system, exhaust system
4IG2 MAIN20IGN, GAUGE, INJ, AIR BAG, IG2 NO.1,
LH-IG2
5EFI MAIN25Multiport fuel injection system/sequential
multiport fuel injection system, EFI NO.2
6A/F15Air intake system
7EDU20Multiport fuel injection system/sequential
multiport fuel injection system
8F/ P M P25Multiport fuel injection system/sequential
multiport fuel injection system
9SPARE30Spare fuse

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6-3. Do-it-yourself maintenance
Light bulbs
Check the wattage of the light bulb to be replaced. (P. 543)
 P. 396
You may replace the following bulbs by yourself. The difficulty level of
replacement varies depending on the bulb. If necessary bulb replace-
ment seems difficult to perform, contact your Lexus dealer.
For more information about replacin g other light bulbs, contact your
Lexus dealer.
Preparing for light bulb replacement
Removing the engine compartment covers

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When trouble arises7
7-1. Essential information Emergency flashers .................. 458
If your vehicle has to be stopped in an emergency .... 459
7-2. Steps to take in an emergency If your vehicle needs to be towed ................................460
If you think something is wrong ................ 466
Fuel pump shut off system ...... 467
If a warning light turns on or a warning buzzer sounds .....468
If a warning message is displayed ................................ 478
If you have a flat tire...................502
If the engine will not start ......... 515
If the shift lever cannot be shifted from P .......................517
If the parking brake cannot be released ................................. 518
If the electronic key does not operate properly ..................... 520
If the vehicle battery is discharged ............................. 523
If your vehicle overheats ......... 527
If the vehicle becomes stuck .............................................530