2015 LEXUS RX450h ECU

6454-2. Maintenance
4
Maintenance and care Items Check points
Indicators/buzzers • Do the indicators and buzzers
function properly?
Lights • Do all the lights come on?
• Are the headlights aimed cor-
rectly? (  P. 7 0 5 )
Pa r k i n g b r a ke • Does the parking brake pedal
move smoothly?
• When parked on a slope and the
parking brake is on, is the vehicle
securely stopped?
Seat belts • Do the seat belts operate
smoothly?
• The seat belts should not be dam-
aged.
Seats • Do the seat controls operate prop-
erly?
Steering wheel • Does the steering wheel rotate
smoothly?
• Does the steering wheel have the
correct amount of free play?
• There should not be any strange
sounds coming from the steering
wheel.

6564-3. Do-it-yourself maintenance
Engine oil
With the engine at operating temperat ure and turned off, check the oil
level on the dipstick.
■ Checking the engine oil
Park the vehicle on level grou nd. After warming up the engine
and turning off the hybrid system, 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.NOTICE■
After installing an engine compartment cover
Make sure that the cover is securely installed in its original position.
STEP 1
STEP 2
STEP 3
STEP 4

6654-3. Do-it-yourself maintenance
4
Maintenance and care Pull on the attached hook to
extend the string.
Use the hook to secure the deck
board as shown in the illustra-
tion.
Remove the spare tire cover.
After removing the clips,
remove the 12-volt battery
cover.STEP 3
STEP 4
STEP 5
STEP 6

6664-3. Do-it-yourself maintenance
Vehicles with a full-size spare tire
Pull the lever upward to fold
back the front part of the deck
board.
Pull on the attached hook to
extend the string.
Use the hook to secure the deck
board as shown in the illustra-
tion.STEP 1
STEP 2
STEP 3

6764-3. Do-it-yourself maintenance
■
Certification for tire pressure warning system
TPMS Transmitter FCC ID: PAXPMV107J
For vehicles sold in the U.S.A.
NOTE:
This device complies with part 15 of the FCC Rules. Operation is subject to the fol-
lowing two conditions: (1) This device may not cause harmful interference, and (2)
this device must accept any interference received, including interference that may
cause undesired operation.
FCC WARNING:
Changes or modifications not expressly approved by the party responsible for
compliance could void the user’s authority to operate the equipment.
For vehicles sold in Canada
NOTE:
Operation is subject to the following two conditions: (1) this device may not cause
interference, and (2) this device must a ccept any interference, including interfer-
ence that may cause undesired operation of the device.
L’utilisation de ce dispositif est autori sée seulement aux deux conditions suivantes:
(1) il ne doit pas produire de brouillage, et (2) l’utilisateur du dispositif doit être prêt
à accepter tout brouillage radioélectrique reçu, même si ce brouillage est
susceptible de compromettre le fonctionnement du dispositif.
TPMS Receiver FCC ID: HYQ13BCX
NOTE:
This device complies with part 15 of the FCC Rules. Operation is subject to the fol-
lowing two conditions: (1) This device may not cause harmful interference, and (2)
this device must accept any interference received, including interference that may
cause undesired operation.
FCC WARNING:
Changes or modifications not expressly approved by the party responsible for
compliance could void the user’s authority to operate the equipment.

6894-3. Do-it-yourself maintenance
4
Maintenance and care Checking and replacing fuses If any of the electrical components do not operate, a fuse may have blown.
If this happens, check and re place the fuses as necessary.
Turn the “POWER” switch off.
After a system failure, see “Fuse layout and amperage ratings”
for details about which fuse to check. (  P. 694)
Engine compartment:
To gain access to the fuse box, remove the engine compart-
ment cover. (  P. 655)
Luggage compartment:
To gain access to the fuse box, secure the deck board with
the hook and then remove th e spare tire cover and 12-volt
battery cover. (  P. 664)
Open the fuse box cover.
Engine compartment (type A fuse box)
Push the tab in and lift the lid off.
Engine compartment (type B fuse box)
Push the tab in and lift the lid off.STEP 1
STEP 2
STEP 3
STEP 4

6964-3. Do-it-yourself maintenance
13
DCDC 150 A IG1 MAIN, TOWING BATT,
DEICER, TOWING, STOP, RDI FAN
NO. 1, ABS NO. 1, RR DEF, AIR SUS,
HEATER, RDI FAN 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, OBD, RR FOG, S/ROOF,
4WD, INVERTER, ECU-ACC, P/
POINT, CIG, RADIO NO. 214
AMP1 30 A Audio system15
EFI MAIN 30 A Multiport fuel injection system/
sequential multiport fuel injection sys-
tem, EFI NO. 1, EFI NO. 2, F/PMP16
AMP2 30 A Audio system17
IG2 MAIN 30 A IGN, GAUGE NO. 2, ECU IG218
IP J/B 25 A Power door lock system19
STR LOCK 20 A Starter system20
RAD NO. 3 15 A Meters and gauges, navigation sys-
tem, audio system21
HAZ 15 A Emergency flashers
22
ETCS 10 A Multiport fuel injection system/
sequential multiport fuel injection sys-
tem
23
RAD NO. 1 10 A Audio system, navigation systemFuse Ampere Circuit

6974-3. Do-it-yourself maintenance
4
Maintenance and care 24
AM2 7. 5 A Starter system25
ECU-B NO. 2 7. 5 A Air conditioning system, front passen-
ger occupant classification system,
audio system, vehicle dynamics inte-
grated management, power windows,
electric power steering system26
MAYDAY/TEL 7. 5 A MAYDAY/TEL27
IMMOBI 7. 5 A IMMOBI28
ABS MAIN
NO. 3 15 A Brake system29
DRL 7. 5 A Daytime running light system30
IGN 10 A Multiport fuel injection system/
sequential multiport fuel injection sys-
tem31
DOME 10 A Vanity mirror lights, luggage compart-
ment lights, interior lights, personal
lights, door courtesy lights, footwell
lights, scuff lights
32
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 opener
33
EFI NO. 1 10 A Multiport fuel injection system/
sequential multiport fuel injection sys-
tem
34
WIP-S 7. 5 A Cruise controlFuse Ampere Circuit