fuel LEXUS RX350 2015 Owner's Guide

6664-3. Do-it-yourself maintenance
CAUTIONThe engine compartment contains many mechanisms and fluids that may move sud-
denly, become hot, or become electrically energized. To avoid death or serious injury,
observe the following precautions: ■
When working on the engine compartment ●
Keep hands, clothing and tools away from the moving fans and engine drive belt.●
Be careful not to touch the engine, radiator , exhaust manifold, etc. right after driv-
ing as they may be hot. Oil and other fluids may also be hot.●
Do not leave anything that may burn easi ly, such as paper and rags, in the engine
compartment.●
Do not smoke, cause sparks or expose an open flame to fuel or the battery. Fuel
and battery fumes are flammable.●
Be extremely cautious when working on the battery. It contains poisonous and
corrosive sulfuric acid.■
When working near the electric cooling fans or radiator grille
Be sure the “ENGINE START STOP” switch is off.
With the “ENGINE START STOP” switch in IGNITION ON mode, the electric
cooling fans may automatically start to run if the air conditioning is on and/or the
coolant temperature is high. (  P. 6 7 8 )■
Safety glasses
Wear safety glasses to prevent flying or falling material, fluid spray, etc. from getting
in your eyes.
NOTICE■
If you remove the air cleaner filter
Driving with the air cleaner filter removed may cause excessive engine wear due to
dirt in the air.

6954-3. Do-it-yourself maintenance
4
Maintenance and care ■
Effects of incorrect tire inflation pressure
Driving with incorrect tire inflation pressure may result in the following: ●
Reduced fuel efficiency●
Reduced driving comfort and tire life●
Reduced safety●
Damage to the drive train
If a tire needs frequent inflating, have it checked by your Lexus dealer.■
Instructions for checking tire pressure
When checking tire inflation pressure, observe the following: ●
Check only when the tires are cold.
If your vehicle has been parked for at least 3 hours or has not been driven for
more than 1 mile or 1.5 km, you will get an accurate cold tire inflation pressure
reading.●
Always use a tire pressure gauge.
The appearance of the tire can be mislea ding. In addition, tire inflation pressure
that is even just a few pounds off can degrade ride and handling.●
Do not reduce tire inflation pressure after driving. It is normal for tire inflation
pressure to be higher after driving.●
Never exceed the vehicle capacity weight.
Passengers and luggage weight should be placed so that the vehicle is bal-
anced.

7074-3. Do-it-yourself maintenance
4
Maintenance and care 13
EPS 60 A Electric power steering system
14
ALT 140 A IG1 MAIN, TOWING BATT,
DEICER, TOWING, STOP, RDI FAN
NO. 1, FILTER, RR DEF, AIR SUS,
HEATER, ABS NO. 2, H-LP CLN,
PBD, ECU-IG1 NO. 1, ECU-IG1 NO.
3, GAUGE NO. 1, ECU-IG1 NO. 2,
EPS, FR WIP, RR WIP, FR WASH, RR
WASH, RH S-HTR, LH S-HTR, TAIL,
PANEL, D/L ALT B, FR FOG, FR
DOOR, FL DOOR, RR DOOR, RL
DOOR, PSB, P-SEAT LH, P-SEAT
RH, TI&TE, FUEL OPN, DR LOCK,
O B D, R R F O G, S / R O O F, 4 W D,
INVERTER, ECU-ACC, P/POINT,
CIG, RADIO NO. 215
AMP1 30 A Audio system16
EFI MAIN 30 A Multiport fuel injection system/
sequential multiport fuel injection sys-
tem, electronic controlled transmis-
sion, EFI NO. 1, EFI NO. 2, F/PMP17
AMP2 30 A Audio system18
IG2 MAIN 30 A IGN, GAUGE NO. 2, ECU IG 219
IP J/B 25 A Power door lock system20
STR LOCK 20 A Starter system
21
RAD NO. 3 15 A Meters and gauges, navigation sys-
tem, audio system
22
HAZ 15 A Emergency flashersFuse Ampere Circuit

7084-3. Do-it-yourself maintenance
23
ETCS 10 A Multiport fuel injection system/
sequential multiport fuel injection sys-
tem24
RAD NO. 1 10 A Audio system, navigation system25
AM2 7. 5 A Starter system26
ECU-B NO. 2 7. 5 A Air conditioning system, front passen-
ger occupant classification system,
audio system, vehicle stability control
system, power windows27
MAYDAY/TEL 7. 5 A MAYDAY/TEL28
IMMOBI 7. 5 A IMMOBI29
ALT-S 7. 5 A Charging system30
DRL 7. 5 A Daytime running light system31
IGN 10 A Multiport fuel injection system/
sequential multiport fuel injection sys-
tem32
DOME 10 A Vanity mirror lights, luggage compart-
ment lights, interior lights, personal
lights, door courtesy lights, footwell
lights, scuff lights
33
ECU-B NO. 1 10 A Tilt and telescopic steering, multiplex
communication system, meters and
gauges, driving position memory,
power seats, power back door, head-
up display, starter system, outside rear
view mirror, steering sensor, garage
door openerFuse Ampere Circuit

7094-3. Do-it-yourself maintenance
4
Maintenance and care 34
EFI NO. 1 10 A Multiport fuel injection system/
sequential multiport fuel injection sys-
tem, electronic controlled transmis-
sion35
WIP-S 7. 5 A Cruise control36
ECU-IG1 NO. 4 10 A Air conditioning system, rear window
defogger, vehicle stability control sys-
tem, electric cooling fans37
BK/UP LP 7. 5 A Back-up lights38
ECU-IG1 NO. 5 15 A Air conditioning system39
ECU-IG1 NO. 6 10 A Head light cleaner, cruise control,
vehicle stability control, air condition-
ing system, Blind Spot Monitor40
EFI NO. 2 10 A Multiport fuel injection system/
sequential multiport fuel injection sys-
tem41
F/ P M P 15 A Multiport fuel injection system/
sequential multiport fuel injection sys-
tem42
DEICER 25 A Windshield wipers and washer
43
STOP 7. 5 A Vehicle stability control, vehicle
dynamics integrated management,
stop lights, electronic controlled
transmission, multiport fuel injection
system/sequential multiport fuel injec-
tion system, shift lock control system,
starter system
44
TOW I N G BAT T 20 A Trailer battery
45
TOW I N G 30 A Trailer lightsFuse Ampere Circuit

7104-3. Do-it-yourself maintenance
46
FILTER 10 A47
IG1 MAIN 30 A ECU-IG1 NO. 6, BK/UP LP, ECU-
IG1 NO. 5, ECU-IG1 NO. 448
H-LP RH HI 15 A Right-hand headlight (high beam)49
H-LP LH HI 15 A Left-hand headlight (high beam)50
BIXENON 10 A51
H-LP RH LO 15 A Right-hand headlight (low beam)52
H-LP LH LO 15 A Left-hand headlight (low beam)53
HORN 10 A Horn54
A/F 20 A Multiport fuel injection system/
sequential multiport fuel injection sys-
tem55
S-HORN 7. 5 A S-HORNFuse Ampere Circuit

7124-3. Do-it-yourself maintenance
7
ECU-IG1 NO. 1 10 A Multiplex communication system,
steering sensor, shift lock control sys-
tem, tilt and telescopic steering, auto-
matic transmission system, power
back door, pre-collision system, vehi-
cle stability control system, tire pres-
sure warning system8
S/ROOF 30 A Moon roof9
FUEL OPN 7. 5 A Fuel filler door opener10
PSB 30 A Pre-collision seat belt11
TI & TE 30 A Tilt and telescopic steering system12
DR LOCK 10 A13
FR FOG 7. 5 A Front fog lights14
P-S E AT L H 30 A Po w e r s e a t ( l e f t - s i d e )15
4WD 7. 5 A AW D s y s t e m16
INVERTER 20 A Po w e r o u t l e t17
RR FOG 7. 5 A18
D/L ALT B 25 A Multiplex communication system,
power door lock system, power back
door19
EPS 10 A Electric power steering system20
ECU-IG1 NO. 2 10 A Intuitive parking assist, AWD system,
pre-collision seat beltFuse Ampere Circuit

7134-3. Do-it-yourself maintenance
4
Maintenance and care 21
PA N E L 10 A Switch illumination, navigation system,
automatic transmission system, audio
system, multi-information display, air
conditioning system, multiplex com-
munication system22
TA I L 10 A Parking lights, front side marker lights,
tail lights, license plate lights, front fog
lights, towing converter23
AIR SUS 20 A24
P-S E AT R H 30 A Power seat (right-side)25
OBD 7. 5 A On-Board diagnosis26
FR DOOR 25 A Front power window (right-side), out-
side rear view mirror27
RR DOOR 25 A Rear power window (right-side)28
FL DOOR 25 A Front power window (left-side), out-
side rear view mirror29
RL DOOR 25 A Rear power window (left-side)30
FR WASH 25 A Windshield wipers and washer31
RR WIP 15 A Windshield wipers and washer32
RR WASH 20 A Windshield wipers and washer33
FR WIP 30 A Windshield wipers and washer
34
ECU IG2 10 A Multiport fuel injection system/
sequential multiport fuel injection sys-
tem, front passenger occupant classi-
fication system, SRS airbag system,
stop lights, electronic controlled
transmission, steering lock systemFuse Ampere Circuit

When trouble arises
5
7335-1. Essential information
Emergency flashers............... 734
If your vehicle needs to be
towed ...................................... 735
If you think something is
wrong ....................................... 742
Fuel pump shut off system.... 743 5-2. Steps to take in an
emergency
If a warning light turns
on or a warning buzzer
sounds... .................................. 744
If a warning message is
displayed................................ 754
If you have a flat tire................ 774
If the engine will not start .... 789
If the shift lever cannot be
shifted from P ......................... 791
If you lose your keys .............. 792
If the electronic key does
not operate properly.......... 793
If the vehicle battery is
discharged ............................. 796
If your vehicle overheats ..... 799
If the vehicle becomes
stuck........................................ 802
If your vehicle has to
be stopped in an
emergency ............................ 804

5
When trouble arises
7435-1. Essential information
Fuel pump shut off system Follow the procedure below to restart the engine after the system is acti-
vated.
Turn the “ENGINE START STOP” switch to ACCESSORY mode
or turn it off.
Restart 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.To minimize the risk of fuel leakage when the engine stalls or when an air-
bag inflates upon collision, the fuel pump shut off system stops the supply of
fuel to the engine. STEP 1
STEP 2