2015 Lexus GS F check engine light

2183-5. Opening, closing the windows and moon roof
GS350_200t_GS F_OM_OM30E87E_(EE)
■When the moon roof does not close normally
Perform the following procedure:
●If the moon roof closes but then re-opens slightlyStop the vehicle.
Press and hold the “CLOSE” switch.
*1
The moon roof will close, reopen an d pause for approximately 10 seconds.*2 Then it
will close again, tilt up and pause for approx imately 1 second. Finally, it will tilt down,
open and close.
Check to make sure that the moon roof is completely closed and then release the
switch.
●If the moon roof tilts down but then tilts back up
Stop the vehicle.
Press and hold the “UP” switch
*1 until the moon roof moves into the tilt up position
and stops.
Release the “UP” switch once and then press and hold the “UP” switch again.
*1
The moon roof will pause for approximatel y 10 seconds in the tilt up position.*2
Then it will adjust slightly and pause for approximately 1 second. Finally, it will tilt
down, open and close.
Check to make sure that the moon roof is completely closed and then release the
switch.
*1: If the switch is released at the incorrect time, the procedure will have to be per-
formed again from the beginning.
*2: If the switch is released after the above mentioned 10 second pause, automatic operation will be disabled. In that case, pr ess and hold the “CLOSE” or “UP” switch,
and the moon roof will tilt up and pause fo r approximately 1 second. Then it will tilt
down, open and close. Check to make sure that the moon roof is completely closed
and then release the switch.
If the moon roof does not fully close even after performing the above procedure cor-
rectly, have the vehicle inspected by any authorized Lexus dealer or repairer, or another
duly qualified and equipped professional.
■Moon roof open warning buzzer
The buzzer sounds and a message is shown on the multi-information display in the instru-
ment cluster when the engine switch is turned off and the driver’s door is opened with the
moon roof open.
■Customization
Settings (e.g. linked door lock operation) can be changed.
(Customizable features: →P. 6 2 8 )
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2254-1. Before driving
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Driving
GS350_200t_GS F_OM_OM30E87E_(EE)
WA R N I N G
Observe the following precautions.
Failure to do so may result in death or serious injury.
■When starting the vehicle
Always keep your foot on the brake pedal while stopped with the engine running. This
prevents the vehicle from creeping.
■When driving the vehicle
●Do not drive if you are unfamiliar with the location of the brake and accelerator ped-
als to avoid depressing the wrong pedal.
• Accidentally depressing the accelerator pedal instead of the brake pedal will result in sudden acceleration that may lead to an accident.
• When backing up, you may twist your body around, leading to a difficulty in oper-
ating the pedals. Make sure to operate the pedals properly.
• Make sure to keep a correct driving posture even when moving the vehicle only slightly. This allows you to depress the brake and accelerator pedals properly.
• Depress the brake pedal using your right foot. Depressing the brake pedal using
your left foot may delay response in an emergency, resulting in an accident.
●Do not drive the vehicle over or stop the vehicle near flammable materials.
The exhaust system and exhaust gases can be extremely hot. These hot parts may
cause a fire if there is any flammable material nearby.
●During normal driving, do not turn off the engine. Turning the engine off while driving
will not cause loss of steering or braking cont rol, but the power assist to these systems
will be lost. This will make it more difficul t to steer and brake, so you should pull over
and stop the vehicle as soon as it is safe to do so.
However, in the event of an emergency, such as if it becomes impossible to stop the
vehicle in the normal way: →P. 5 0 3
●Use engine braking (downshift) to maintain a safe speed when driving down a steep
hill.
Using the brakes continuously may cause the brakes to overheat and lose effective-
ness. ( →P. 2 4 5 )
●Do not adjust the positions of the steering wheel, the seat, or the inside or outside rear
view mirrors while driving.
Doing so may result in a loss of vehicle control.
●Always check that all passengers’ arms, heads or other parts of their body are not
outside the vehicle.
■When driving on slippery road surfaces
●Sudden braking, acceleration and steering may cause tire slippage and reduce your
ability to control the vehicle.
●Sudden acceleration, engine braking due to shifting, or changes in engine speed
could cause the vehicle to skid, resulting in an accident.
●After driving through a puddle, lightly depres s the brake pedal to make sure that the
brakes are functioning properly. Wet brake pads may prevent the brakes from func-
tioning properly. If th e brakes on only one side are wet and not functioning properly,
steering control may be affected.

2444-2. Driving procedures
GS350_200t_GS F_OM_OM30E87E_(EE)
NOTICE
■To prevent battery discharge
●Do not leave the engine switch in ACCESSORY or IGNITION ON mode for long
periods of time without the engine running.
●If “POWER ON” is displayed on the multi-information display, the engine switch is
not off. Exit the vehicle after turning the engine switch off.
●Do not stop the engine when the shift lever is in a position other than P. If the engine is
stopped in another shift lever position, the engine switch will not be turned off but
instead be turned to ACCESSORY mode. If the vehicle is left in ACCESSORY
mode, battery discharge may occur.
■When starting the engine
●Do not race a cold engine.
●If the engine becomes difficult to start or stalls frequently, have your vehicle checked
by any authorized Lexus dealer or repairer, or another duly qualified and equipped
professional immediately
■Symptoms indicating a malfunction with the engine switch
If the engine switch seems to be operating somewhat differently than usual, such as the
switch sticking slightly, there may be a malfunction. Contact any authorized Lexus
dealer or repairer, or another duly qualif ied and equipped professional immediately.

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4-2. Driving procedures
Driving
GS350_200t_GS F_OM_OM30E87E_(EE)
Turn signal lever
The lever will return to its original position immediately after operation.
Right turn
Lane change to the right (move the
lever partway and release it)
The right hand signals will flash 3 times.
Lane change to the left (move the
lever partway and release it)
The left hand signals will flash 3 times.
Left turn
■If the turn signals do not stop flashing after turning left or right, or if you want
to stop them flashing
Operate the lever in the opposite direction to either position or .
If you move the lever to either position or , the selected turn signals will
flash.
■Turn signals can be operated when
The engine switch is in IGNITION ON mode.
■If the indicator flashes faster than usual
Check that a light bulb in the front or rear turn signal lights has not burned out.
■If the turn signals stop flashing before a lane change has been performed
Operate the lever again.
Operating instructions
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2584-2. Driving procedures
GS350_200t_GS F_OM_OM30E87E_(EE)
■When the parking brake is set automatically while the system is holding the brakes
The parking brake will not be released automatically. Perform one of the following proce-
dures to release the parking brake and confirm that the parking brake indicator light
turns off. ( →P. 2 5 4 )
●With the brake pedal depressed, operate the parking brake switch.
●Fasten your seat belt, check that the shift leve r is in either D or R and slowly depress the
accelerator pedal.
■Warning message and buzzers
Warning messages and buzzers are used to in dicate a system malfunction or to inform
the driver of the need for caution. ( →P. 5 1 8 )
WA R N I N G
■When the vehicle is on a steep incline
When using the brake hold system on a steep incline exercise caution. The brake hold
function may not hold the vehicle in such a situation.
■When stopped on a slippery road
The system cannot stop the vehicle when the gripping ability of the tires has been
exceeded. Do not use the system when stopped on a slippery road.
NOTICE
■When parking the vehicle
The brake hold system is not designed for use when parking the vehicle for a long
period of time. Turning the engine switch off while the system is holding the brake may
release the brake, which would cause the vehicle to move. When operating the engine
switch, depress the brake pedal, set the parking brake and shift the shift lever to P.

2784-3. Operating the lights and wipers
GS350_200t_GS F_OM_OM30E87E_(EE)
■Raindrop sensor (vehicles with rain-sensing windshield wipers)
●If AUTO mode is selected while the engine switch is in IGNITION ON mode, the wip-
ers will operate once to show that AUTO mode is activated.
●If the temperature of the raindrop sensor is 85°C (185°F) or higher, or -30°C
(-22°F) or lower, automatic operation may not occur. In this case, operate the wip-
ers in any mode other than AUTO mode.
■When the windshield wipers are in temporary operation
AUTO mode cannot be activated even if is pressed.
■If no windshield washer fluid sprays
Check that the washer nozzles are not blocked if there is washer fluid in the windshield
washer fluid reservoir.
●The raindrop sensor judges the amount of
raindrops.
An optical sensor is adopted. It may not oper-
ate properly when sunlight from the rising or
setting of the sun intermittently strikes the
windshield, or if bugs etc. are present on the
windshield.
WA R N I N G
■Caution regarding the use of windshield wipers in AUTO mode
The windshield wipers may operate unexpectedly if the sensor is touched or the wind-
shield is subject to vibration in AUTO mode. Take care that your fingers or anything
else do not become caught in the windshield wipers.
■Caution regarding the use of washer fluid
When it is cold, do not use the washer fl uid until the windshield becomes warm. The
fluid may freeze on the windshield and cause low visibility. This may lead to an accident,
resulting in death or serious injury.

433
6Maintenance and care
GS350_200t_GS F_OM_OM30E87E_(EE)
6-1. Maintenance and careCleaning and protecting the vehicle exterior................. 434
Cleaning and protecting the vehicle interior..................438
6-2. Maintenance Maintenance requirements...............................441
6-3. Do-it-yourself maintenance Do-it-yourself service precautions................................ 443
Hood ............................................... 445
Positioning a floor jack............. 446
Engine compartment ............... 448
Tires.................................................. 465
Tire inflation pressure ................479
Wheels ............................................ 481
Air conditioning filter ...............483
Electronic key battery ..............485
Checking and replacing fuses.............................................. 487
Light bulbs..................................... 492

469 6-3. Do-it-yourself maintenance
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Maintenance and care
GS350_200t_GS F_OM_OM30E87E_(EE)
■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 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 registered, 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 malfunc-
tion.
■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 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 ti re 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 th at the tire pressure is properly adjusted.
■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 appro-
priate for road and weather conditions. (→P. 383)
■If the tread on snow tires wears down below 4 mm (0.16 in.)
The effectiveness of the tire s as snow tires is lost.