check engine Lexus GS350 2020 Owner's Guide

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GS350_GS F_OM_OM30J07U_(U)
6Maintenance and care
6-1. Maintenance and careCleaning and protecting the vehicle exterior ................ 362
Cleaning and protecting the vehicle interior.................. 367
6-2. Maintenance Maintenance requirements ... 370
General maintenance.............. 372
Emission inspection and maintenance (I/M)
programs .................................... 375
6-3. Do-it-yourself maintenance Do-it-yourself service precautions................................ 376
Hood ............................................... 378
Positioning a floor jack ............ 379
Engine compartment ................ 381
Tires ................................................. 394
Tire inflation pressure............... 404
Wheels ........................................... 407
Air conditioning filter ...............409
Electronic key battery ................. 411
Checking and replacing fuses ............................................... 413
Headlight aim (vehicles with single-beam headlights).........417
Light bulbs...................................... 419

372
GS350_GS F_OM_OM30J07U_(U)6-2. Maintenance
General maintenance
Listed below are the general maintenanc
e items that should be performed at
the intervals specified in the “Warranty and Service Guide” or “Owner’s
Manual Supplement”. It is recommende d that any problem you notice should
be brought to the attention of your Lexu s dealer or qualified service shop for
advice.
Engine compartment
ItemsCheck points
BatteryCheck the battery fluid level and connections.
(  P. 391)
Brake fluidIs the brake fluid at the correct level? ( P. 390)
Engine coolantIs the engine coolant at the correct level?
( P. 388)
Engine oilIs the engine oil at the correct level? ( P. 385)
Exhaust systemThere should not be any fumes or strange sounds.
Radiator/condenserThe radiator and condenser should be free from for-
eign objects. ( P. 389)
Washer fluidIs there sufficient washer fluid? ( P. 393)

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GS350_GS F_OM_OM30J07U_(U)6-2. Maintenance
Vehicle exterior
ItemsCheck points
Doors/trunk• Do the doors/trunk operate smoothly?
Engine hood• Does the engine hood lock system work prop-
erly?
Fluid leaks• There should not be an y signs of fluid leakage
after the vehicle has been parked.
Tires
• Is the tire inflation pressure correct?
• The tires should not be damaged or excessively
worn.
• Have the tires been rotated according to the
maintenance schedule?
• The wheel nuts should not be loose.
Windshield wipers
• The wiper blades should not show any signs of
cracking, splitting, wear, contamination or defor-
mation.
• The wiper blades should clear the windshield without streaking or skipping.
WARNING
■If the engine is running
Turn the engine off and ensure that there is adequate ventilation before performing
maintenance checks.

384
GS350_GS F_OM_OM30J07U_(U)6-3. Do-it-yourself maintenance
■Installing the clips
Push up center portion
Insert
Press
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2
3
NOTICE
■Checking the engine compartm ent cover after installation
Make sure that the cover is securely installed in its original position.

GS350_GS F_OM_OM30J07U_(U)
3856-3. Do-it-yourself maintenance
6
Maintenance and care
With the engine at operating temperature and turned off, check the oil level on
the dipstick.
■Checking the engine oil
Park the vehicle on level ground. Afte r warming up the engine and turning
it off, wait more than 5 minutes for the oil to drain back into the bottom of
the engine.
Holding a rag under the end, pull the dipstick out.
Wipe the dipstick clean.
Reinsert the dipstick fully.
Holding a rag under the end, pull the dipstick out and check the oil level.
Low
Normal
Excessive
The shape of the dipstick may differ depending on the type of vehicle or engine.
Wipe the dipstick and reinsert it fully.
Engine oil
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GS350GS F
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5
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3
Flat dipstickNon-flat dipstick
6

386
GS350_GS F_OM_OM30J07U_(U)6-3. Do-it-yourself maintenance
■Adding engine oil
If the oil level is below or near the lo
w level mark, add engine oil of the same
type as that already in the engine.
Make sure to check the oil type and prepare the items needed before adding
oil.
Remove the oil filler cap by turning it counterclockwise.
Add engine oil slowly, checking the dipstick.
Install the oil filler cap by turning it clockwise.
■Engine oil consumption
A certain amount of engine oil will be consumed while driving. In the following situations,
oil consumption may increase, and engine oil may need to be refilled in between oil
maintenance intervals.
●When the engine is new, for example directly after purchasing the vehicle or after
replacing the engine
●If low quality oil or oil of an inappropriate viscosity is used
●When driving at high engine speeds or with a heavy load, or when driving while accel-
erating or decelerating frequently
●When leaving the engine idling for a long time, or when driving frequently through
heavy traffic
GS350GS F
Engine oil selection P. 519, 521
Oil quantity (Low  Full) 1.6 qt. (1.5 L, 1.3 Imp.qt.)
Items Clean funnel
1
2
3

GS350_GS F_OM_OM30J07U_(U)
3876-3. Do-it-yourself maintenance
6
Maintenance and care
■After changing the engine oil (GS350)
The engine oil maintenance data should be reset. Perform the following procedures:
Press or of the meter control switch and select .
Press or of the meter control switch an d select “Vehicle Settings”. Then press
.
Press or of the meter control switch and select “Oil Maintenance”. Then press
.
Select “Yes” and press .
A message is displayed on the multi-informa-
tion display.
WARNING
■Used engine oil
●Used engine oil contains potentially harm ful contaminants which may cause skin dis-
orders such as inflammation and skin cance r, so care should be taken to avoid pro-
longed and repeated contact. To remove used engine oil from your skin, wash
thoroughly with soap and water.
●Dispose of used oil and filters only in a sa fe and acceptable manner. Do not dispose of
used oil and filters in household trash, in sewers or onto the ground.
Call your Lexus dealer, service station or auto parts store for information concerning
recycling or disposal.
●Do not leave used engine oil within the reach of children.
NOTICE
■To prevent serious engine damage
Check the oil level on a regular basis.
■When replacing the engine oil
●Be careful not to spill engine oil on the vehicle components.
●Avoid overfilling, or the engine could be damaged.
●Check the oil level on the dipstick every time you refill the vehicle.
●Be sure the engine oil filler cap is properly tightened.
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2
3
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5

388
GS350_GS F_OM_OM30J07U_(U)6-3. Do-it-yourself maintenance
The coolant level is satisfactory if it
is between the “FULL”/“F” and “LOW”/“L”
lines on the reservoir when the engine is cold.
■Engine coolant reservoir
Reservoir cap
“FULL” line
“LOW” line
If the level is on or below the “LOW” lin e, add coolant up to the “FULL” line.
(  P. 509)
■Coolant selection
Only use “Toyota Super Long Life Coolant” or a similar high quality ethylene glycol
based non-silicate, non-amine, non-nitrite, and non-borate coolant with long-life hybrid
organic acid technology.
U.S.A.:
“Toyota Super Long Life Coolant” is a mixt ure of 50% coolant and 50% deionized water.
(Minimum temperature: -31 F [-35 C])
Canada:
“Toyota Super Long Life Cool ant” is a mixture of 55% coolant and 45% deionized water.
(Minimum temperature: -44 F [-42C])
For more details about coolant, contact your Lexus dealer.
■If the coolant level drops within a short time of replenishing
Visually check the radiator, hoses, engine coolant reservoir caps, drain cock and water
pump.
If you cannot find a leak, have your Lexus de aler test the cap and check for leaks in the
cooling system.
Coolant
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2
3
GS350GS F

GS350_GS F_OM_OM30J07U_(U)
3896-3. Do-it-yourself maintenance
6
Maintenance and care
Check the radiator and condenser and clear away any foreign objects.
If either of the above parts is extremely dirty or you are not sure of their condi-
tion, have your vehicle inspected by your Lexus dealer.
WARNING
■When the engine is hot
Do not remove the engine coolant reservoir cap or the coolant inlet cap. ( P. 512)
The cooling system may be under pressure and may spray hot coolant if the cap is
removed, causing serious injuries, such as burns.
NOTICE
■When adding coolant
Coolant is neither plain water nor straight antifreeze. The correct mixture of water and
antifreeze must be used to provide proper lubrication, corrosion protection and cool-
ing. Be sure to read the antifreeze or coolant label.
■If you spill coolant
Be sure to wash it off with water to prevent it from damaging parts or paint.
Radiator and condenser
WARNING
■When the engine is hot
Do not touch the radiator or condenser as they may be hot and cause serious injuries,
such as burns.

GS350_GS F_OM_OM30J07U_(U)
3916-3. Do-it-yourself maintenance
6
Maintenance and care
Check the battery as follows.
■Battery exterior
Make sure that the battery terminals are not corroded and that there are no
loose connections, cracks, or loose clamps.
Terminals
Hold-down clamp
■Before recharging
When recharging, the battery produces hydrogen gas which is flammable and explosive.
Therefore, observe the following before recharging:
●If recharging with the battery installed on the vehicle, be sure to disconnect the ground
cable.
●Make sure the power switch on the charge r is off when connecting and disconnecting
the charger cables to the battery.
■After recharging/reconnecting the battery
The engine may not start. Follow the procedure below to initialize the system.
Shift the shift lever to P.
Open and close any of the doors.
Restart the engine.
●Unlocking the doors using the smart access system with push-button start may not be
possible immediately after reconnecting the battery. If this happens, use the wireless
remote control or the mechanical key to lock/unlock the doors.
●Start the engine with the engine switch in ACCESSORY mode. The engine may not
start with the engine switch turned off. However, the engine will operate normally from
the second attempt.
●The engine switch mode is recorded by the vehicle. If the battery is reconnected, the
vehicle will return the engine switch mode to the status it was in before the battery was
disconnected. Make sure to turn off the engine before disconnect the battery. Take
extra care when connecting the battery if the engine switch mode prior to discharge is
unknown.
If the engine will not start even after multiple attempts at both methods, contact your
Lexus dealer.
Battery
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