2015 LEXUS RC350 fuel

5017-3. Do-it-yourself maintenance
7
Maintenance and care
RC350/RCF_U (OM24636U)
Tire valve
Tire pressure gauge
Remove the tire valve cap.
Press the tip of the tire pressure gauge onto the tire valve.
Read the pressure using the gauge gradations.
If the tire inflation pressure is not at the recommended level, adjust the pres-
sure.
If you add too much air, press the center of the valve to deflate.
After completing the tire inflation pressure measurement and adjustment,
apply soapy water to the valve and check for leakage.
Put the tire valve cap back on.
■Tire inflation pressure check interval
You should check tire inflation pressure ev ery two weeks, or at least once a month.
Do not forget to check the spare.
■Effects of incorrect tire inflation pressure
Driving with incorrect tire inflation pressure may result in the following:
●Reduced fuel economy
●Reduced driving comfort and poor handling
●Reduced tire life due to wear
●Reduced safety
●Damage to the drivetrain
If a tire needs frequent inflating, have it checked by your Lexus dealer.
Inspection and adjustment procedure
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521
When trouble arises8
RC350/RCF_U (OM24636U)
8-1. Essential informationEmergency flashers................... 522
If your vehicle has to be stopped in an
emergency .................................523 8-2. Steps to take in
an emergency
If your vehicle needs to be towed ........................................... 524
If you think something is wrong ............................................ 531
Fuel pump shut off system .......................................... 532
If a warning light turns on or a warning buzzer
sounds.......................................... 533
If a warning message is displayed..................................... 539
If you have a flat tire (vehicles with a spare
tire) ................................................560
If you have a flat tire (vehicles without a spare
tire) ................................................. 574
If the engine will not start ........ 587
If the shift lever cannot be shifted from P............................589
If the electronic key does not operate properly .............590
If the vehicle battery is discharged ................................. 593
If your vehicle overheats ......... 597
If the vehicle becomes stuck ............................................ 600

5328-2. Steps to take in an emergency
RC350/RCF_U (OM24636U)
Follow the procedure below to restart the engine after the system is activated.Turn the engine switch to AC CESSORY mode or turn it off.
Restart the engine.
Fuel pump shut off system
To minimize the risk of fuel leakage wh en the engine stalls or when an airbag
inflates upon collision, the fuel pump shut off system stops the supply of fuel to
the engine.
NOTICE
■Before starting the engine
Inspect the ground under the vehicle.
If you find that fuel has leaked onto the ground, the fuel system has been damaged and
is in need of repair. Do not restart the engine.
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5348-2. Steps to take in an emergency
RC350/RCF_U (OM24636U)
Electric power steering system warning light (warning buzzer)Indicates a malfunction in the EP S (Electric Power Steering) sys-
tem
 Have the vehicle inspected by your Lexus dealer immediately.
(Flashes)
(If equipped)
Pre-collision system warning light Indicates a malfunction in the PCS (Pre-Collision System)
The warning light will operate as follows, even when the system is
not malfunctioning:
• The light will flash quickly when the system is operating.
( P. 2 9 0 )
• The light will turn on when the pre-collision system is disabled.
(  P. 2 9 1 )
• The light will turn on when th e VSC (Vehicle Stability Control)
system is disabled. ( P. 2 8 5 )
• The light will flash when the system cannot temporarily be used.
( P. 5 5 3 )
 Have the vehicle inspected by your Lexus dealer immediately.
Slip indicator
Indicates a malfunction in:
• The VSC (Vehicle Stability Control) system;
• The TRAC (Traction Control) system; or
• The hill-start assist control system
The light will flash when the VSC or the TRAC system is operating.
 Have the vehicle inspected by your Lexus dealer immediately.
Automatic headlight leveling system warning light
Indicates a malfunction in the au tomatic headlight leveling system
 Have the vehicle inspected by your Lexus dealer immediately.
Open door warning light (warning buzzer)*2
Indicates that a door or the trunk is not fully closed
 Check that both side doors and the trunk are closed.
Low fuel level warning light
Indicates that remaining fuel is approximately 2.6 gal. (10 L, 2.2
Imp. gal.) or less
 Refuel the vehicle.
Seat belt reminder light (warning buzzer)*3
Warns the driver and/or front passenger to fasten their seat belts
 Fasten the seat belt.
If the front passenger’s seat is occupied, the front passenger’s
seat belt also needs to be fa stened to make the warning light
(warning buzzer) turn off.
Master warning light A buzzer sounds and the warning light comes on and flashes to
indicate that the master warning system has detected a malfunc-
tion.
 P. 5 3 9
Warning lightWarning light/Details/Actions

5368-2. Steps to take in an emergency
RC350/RCF_U (OM24636U)
■SRS warning light
This warning light system monitors the airbag sensor assembly, front impact sensors, side
impact sensors (door), side impact sensors (f ront), side impact sensors (rear), driver’s
seat position sensor, driver’s seat belt buck le switch, front passenger occupant classifica-
tion system, “AIR BAG ON” indicator light, “A IR BAG OFF” indicator light, front passen-
ger’s seat belt buckle switch, seat belt pretensioners, ai rbags, interconnecting wiring and
power sources. ( P. 41)
■Front passenger detection sensor, seat belt reminder and warning buzzer
If luggage is placed on the front passenger seat, the front passenger detection sensor
may cause the warning light to flash and the wa rning buzzer to sound even if a passenger
is not sitting in the seat.
■If the malfunction indicator lamp comes on while driving
First check the following:
●Is the fuel tank empty?
If it is, fill the fuel tank immediately.
●Is the fuel tank cap loose?
If it is, tighten it securely.
The light will go off after several driving trips.
If the light does not go off even after severa l trips, contact your Lexus dealer as soon as
possible.
■Electric power steering system warning light (warning buzzer)
When the battery charge becomes insufficie nt of the voltage temporarily drops, the
electric power steering system warning light may come on and the warning buzzer may
sound.
■When the tire pressure warning light comes on
Check the tire inflation pressure and adjust to the appropriate level. Pushing the tire
pressure warning reset switch will not tu rn off the tire pressure warning light.
■The tire pressure warning light may come on due to natural causes
The tire pressure warning light may come on due to natural causes such as natural air
leaks and tire inflation pressure changes caused by temperature. In this case, adjusting
the tire inflation pressure will turn off the warning light (after a few minutes).
■When a tire is replaced with the spare tire (if equipped)
The spare tire is not equipped with a tire pr essure warning valve and transmitter. If a tire
goes flat, the tire pressure warning light will no t turn off even though the flat tire has been
replaced with the spare tire.
■Conditions that the tire pressure warning system may not function properly
 P. 4 9 6
■If the tire pressure warning light frequently comes on after blinking for 1 minute
If the tire pressure warning light frequently comes on after blinking for 1 minute when the
engine switch is turned to IGNITION ON mo de, have it checked by your Lexus dealer.
■Warning buzzer
In some cases, the buzzer may not be heard due to being in a noisy location or audio
sound.

5388-2. Steps to take in an emergency
RC350/RCF_U (OM24636U)
WA R N I N G
■Maintenance of the tires
Each tire, including the spare (if provided), should be checked monthly when cold and
inflated to the inflation pressure recomm ended by the vehicle manufacturer on the
vehicle placard or tire inflation pressure la bel (tire and load information label). (If your
vehicle has tires of a different size than the size indicated on the vehicle placard or tire
inflation pressure label [tire and load in formation label], you should determine the
proper tire inflation pressure for those tires.)
As an added safety feature, your vehicle has been equipped with a tire pressure moni-
toring system (TPMS-tire pressure warning system) that illuminates a low tire pressure
telltale (tire pressure warning light) when on e or more of your tires is significantly
under-inflated. Accordingly, when the low ti re pressure telltale (tire pressure warning
light) illuminates, you should stop and check your tires as soon as possible, and inflate
them to the proper pressure. Driving on a significantly under-inflated tire causes the
tire to overheat and can lead to tire failure. Under-inflation also reduces fuel efficiency
and tire tread life, and ma y affect the vehicle’s handling and stopping ability.
Please note that the TPMS (tire pressure wa rning system) is not a substitute for proper
tire maintenance, and it is the driver’s resp onsibility to maintain correct tire pressure,
even if under-inflation has no t reached the level to trigger illumination of the TPMS low
tire pressure telltale (tire pressure warning light).
Your vehicle has also been equipped with a TPMS (tire pressure warning system) mal-
function indicator to indicate when the system is not operating properly. The TPMS
(tire pressure warning system) malfunction indi cator is combined with the low tire pres-
sure telltale (tire pressure warning light). When the system detects a malfunction, the
telltale will flash for approximately one minu te and then remain continuously illumi-
nated. This sequence will cont inue upon subsequent vehicle start-ups as long as the
malfunction exists. When the malfunction indicator is illuminated, the system may not
be able to detect or signal low tire pressure as intended.
TPMS (tire pressure warning system) malfun ctions may occur for a variety of reasons,
including the installation of replacement or alternate tires or wheels on the vehicle that
prevent the TPMS (tire pressure warning system) from functioning properly. Always
check the TPMS (tire pressure warning syst em) malfunction telltale after replacing one
or more tires or wheels on your vehicle to ensure that the replacement or alternate
tires and wheels allow the TPMS (tire pressure warning system) to continue to function
properly.
NOTICE
■To ensure the tire pressure warning system operates properly
Do not install tires with different specificatio ns or makers, as the tire pressure warning
system may not operate properly.

5528-2. Steps to take in an emergency
RC350/RCF_U (OM24636U)
Indicates that remaining fuel is approximately 2.6 gal.
(10 L, 2.2 Imp. gal.) or less
 Refuel the vehicle.
RC350 only
Indicates that the TRAC (Tra ction Control) system has
been deactivated
 Tu r n t h e T R A C o n . ( P. 2 8 4 )
RC350
(U.S.A. only)
Indicates that all maintenance according to the driven
distance on the maintenance schedule
* should be per-
formed soon.
Comes on approximately 4500 miles (7200 km) after
the message has been reset.
 If necessary, perform maintenance.
RC F
(U.S.A. only)
(U.S.A. only)
Indicates that all maintenance is required to correspond
to the driven distance on the maintenance schedule
*.
Comes on approximately 5000 miles (8000 km) after
the message has been reset.
(The indicator will not work properly unless the message
has been reset.)
 Perform the necessary maintenance. Please reset
the message after the maintenance is performed
( P. 4 6 7 )
Wa r n i n g m e s s a g eDetails/Actions

5878-2. Steps to take in an emergency
8
When trouble arises
RC350/RCF_U (OM24636U)
One of the following may be the cause of the problem:
●There may not be sufficient fuel in the vehicle’s tank.
Refuel the vehicle.
●The engine may be flooded.
Try to restart the engine again following correct starting procedures.
(P. 1 9 3 )
●There may be a malfunction in the engine immobilizer system. ( P. 76 )
One of the following may be the cause of the problem:
●The battery may be discharged. ( P. 5 9 3 )
●The battery terminal connections may be loose or corroded.
The engine starting system may be malfun ctioning due to an electrical problem
such as electronic key battery depletion or a blown fuse. However, an interim
measure is available to start the engine. ( P. 588)
If the engine will not start
If the engine will not start even though correct starting procedures are being
followed ( P. 193), consider each of the following points:
The engine will not start even thoug h the starter motor operates nor-
mally.
The starter motor turns over slowly , the interior lights and headlights
are dim, or the horn does not sound or sounds at a low volume.
The starter motor does not turn over