2015 LEXUS RX350 check engine

7194-3. Do-it-yourself maintenance
4
Maintenance and care Light bulbs You may replace the following bulbs by yourself. The difficulty level of
replacement varies depending on the bulb. If necessary bulb replacement
seems difficult to perform, contact your Lexus dealer.
For more information about replacing other light bulbs, contact your Lexus
dealer.
■ Preparing for light bulb replacement
Check the wattage of the light bulb to be replaced. (  P. 817)
■ Removing the engine compartment covers
 P. 6 7 1
■ Turning off the power back door main switch
 P. 5 8
■ Front bulb locations
Vehicles with halogen headlights Headlight high beamHeadlight low beam
Front turn signal light

5
When trouble arises
7515-2. Steps to take in an emergency
●
If non-genuine Lexus wheels are used (Even if you use Lexus wheels, the tire
pressure warning system may not work properly with some types of tires.)●
If tire chains are used●
Vehicles with a full-size spare tire: If the spare tire is in a location subject to poor
radio wave signal reception●
Vehicles with a full-size spare tire: If a large metallic object which can interfere
with signal reception is pu t in the luggage compartment■
If the tire pressure warning light freque ntly comes on after blinking for 1 minute
If the tire pressure warning light frequently comes on after blinking for 1 minute
when the “ENGINE START STOP” switch is turned to IGNITION ON mode, have
it checked by your Lexus dealer.■
Customization
The vehicle speed linked seat belt reminder buzzer can be disabled.
(Customizable features  P. 8 3 4 )
CAUTION■
When the electric power steering system warning light comes on
The steering wheel may become extremely heavy.
If the steering wheel becomes heavier than usual when operating, hold firmly and
operate using more force than usual.■
If the tire pressure warning light comes on
Be sure to observe the following precautions. Failure to do so could cause loss of
vehicle control and result in death or serious injury. ●
Stop your vehicle in a safe place as soon as possible. Adjust the tire inflation pres-
sure immediately.●
If the tire pressure warning light comes on even after tire inflation pressure adjust-
ment, it is probable that you have a flat tire. Check the tires. If a tire is flat, change
it with the spare tire and have the flat tire repaired by the nearest Lexus dealer.
●
Avoid abrupt maneuvering and braking. If the vehicle tires deteriorate, you could
lose control of the steering wheel or the brakes.
■
If a blowout or sudden air leakage should occur
The tire pressure warning system may not activate immediately.

7645-2. Steps to take in an emergency
Indicates that the engine
has overheated
A buzzer also sounds. Stop and check.
(  P. 7 9 9 )
Indicates that remaining
fuel is approximately 2.8
gal. (10.7 L, 2.3 Imp. gal.)
or less Refuel the vehicle.
(Flashes) Indicates that the
“ENGINE START STOP”
switch is turned off or
turned to ACCESSORY
mode and the driver's
door is opened while the
lights are turned on. Turn the lights off.
(If equipped) Indicates that the Blind
Spot Monitor sensors or
the surrounding area on
the bumper is dirty or
covered with ice. Clean the sensor and its
surrounding area on the
bumper.Wa r n i n g m e s s a g e Details Correction procedure

7665-2. Steps to take in an emergency
Have the malfunction repaired immediately
After taking the specified steps to co rrect the suspected problem, check
that the warning message and light go off. Interior
buzzer Exterior
buzzer Wa r n i n g m e s s a g e Details Correction
procedure
Sounds
once 
(Flashes) The electronic key
is not detected
when an attempt
is made to start
the engine. Confirm the loca-
tion of the elec-
tronic key.
Sounds
once Sounds
3 times
(Flashes) The electronic key
was carried out-
side the vehicle
and a door other
than the driver's
door was opened
and closed while
the “ENGINE
START STOP”
switch was in a
mode other than
off. Bring the elec-
tronic key back
into the vehicle.
The driver's door
was opened and
closed while the
electronic key was
not in the vehicle,
the shift lever was
in P and the
“ENGINE START
STOP” switch was
not turned off. Tu r n t h e
“ENGINE START
STOP” switch off
or bring the elec-
tronic key back
into the vehicle.

5
When trouble arises
7855-2. Steps to take in an emergency
CAUTION■
Using the tire jack
Improper use of the tire jack may cause the vehicle to suddenly fall off the jack,
leading to death or serious injury. ●
Do not use the tire jack for any purpose other than replacing tires or installing and
removing tire chains.●
Only use the tire jack that comes with this vehicle for replacing a flat tire.
Do not use it on other vehicles, and do no t use other tire jacks for replacing tires
on this vehicle.●
Always check that the tire jack is securely set to the jack point.●
Do not put any part of your body under the vehicle while it is supported by the
jack.●
Do not start or run the engine while your vehicle while it is supported by the jack.●
Do not raise the vehicle while someone is inside.●
When raising the vehicle, do not put an object on or under the jack.●
Do not raise the vehicle to a height greate r than that required to replace the tire.●
Use a jack stand if it is necessary to get under the vehicle.
Take particular care when lowering the vehicle to ensure that no one working on or
near the vehicle may be injured.

8005-2. Steps to take in an emergency
Add coolant if necessary.
(
 P. 6 7 1 )
Water can be used in an emer-
gency if coolant is unavailable.
Start the engine and turn the air conditioning system on to check
that the radiator cooling fans op erate and to check for coolant
leaks from the radiator or hoses. The fans operate when the air conditio ning system is turned on immedi-
ately after a cold start. Confirm that the fans are operating by checking
the fan sound and air flow. If it is diff icult to check these, turn the air con-
ditioning system on and off repeatedly.
(The fans may not operate in freezing temperatures.)
If the fans are not operating:
Stop the engine immediately and contact your Lexus dealer.
If the fans are operating:
Have the vehicle inspected at the nearest Lexus dealer.STEP 5
CAUTION■
To prevent an accident or injury when in specting under the hood of your vehicle●
If steam is seen coming from under the hood, do not open the hood until the
steam has subsided. The engine compartm ent may be very hot, causing serious
injuries such as burns.●
Keep hands and clothing (especially a tie, a scarf or a muffler) away from the fans
and belts. Failure to do so may cause the hands or clothing to be caught, resulting
in serious injury.
●
Do not loosen the radiator cap while the engine and radiator are hot.
Serious injury, such as burns, may resu lt from hot coolant and steam released
under pressure.STEP 6
STEP 7

8096-1. Specifications
6
Vehicle specifications Lubrication system
*: The engine oil capacity is a referenc e quantity to be used when changing
the engine oil. Warm up and turn off the engine , wait more than 5 minutes,
and check the oil level on the dipstick.
■ Engine oil selection
“Toyota Genuine Motor Oil” is used in your Lexus vehicle. Use Lexus
approved “Toyota Genuine Motor Oil” or equivalent to sa tisfy the follow-
ing grade and viscosity.
Oil grade: ILSAC GF-5 multigrade engine oilOil capacity
(Drain and refill 
reference*)
With filter 6.4 qt. (6.1 L, 5.4 Imp. qt.)
Without filter 6.0 qt. (5.7 L, 5.0 Imp. qt.)

8126-1. Specifications
Electrical system
Automatic transaxle
6-speed models
* : The fluid capacity is a reference quantity. If replacement is necessary, contact
your Lexus dealer.
8-speed models
* : The fluid capacity is a reference quantity. If replacement is necessary, contact
your Lexus dealer.Battery
Open voltage* at
68  F (20  C): 12.6  
12.8 V Fully charged
12.2  
12.4 V Half charged
11.8  
12.0 V Discharged
(*: Voltage checked 20 minutes after the engine and
all the lights are turned off)
Charging rates 5 A max.
Fluid capacity
* 2WD 6.9 qt. (6.5 L, 5.7 Imp. qt.)
AW D 7.1 qt. (6.7 L, 5.9 Imp. qt.)
Fluid type Toyota Genuine ATF WS
Fluid capacity
* 7.2 qt. (6.8 L, 6.0 Imp. qt.)
Fluid type Toyota Genuine ATF WS
NOTICE
■
Automatic transmission fluid type
Using automatic transmission fluid other than “Toyota Genuine ATF WS” may
cause deterioration in shift quality, lockin g up of your transmission accompanied by
vibration, and ultimately damage the automatic transm ission of your vehicle.