2016 LEXUS RX450H ECU

468 6-2. Maintenance
RX450h_U_OM0E013U * : Vehicles with sing le-beam headlightsVehicle interior Items Check points
Accelerator pedal • The accelerator pedal should move smoothly (with-
out uneven pedal effort or catching).
Brake pedal • Does the brake pedal move smoothly?
• Does the brake pedal have appropriate clearance
from the floor? (  P. 588)
• Does the brake pedal have the correct amount of
free play? (  P. 588)
Brakes • The vehicle should not pull to one side when the
brakes are applied.
• The brakes should work effectively.
• The brake pedal should not feel spongy.
• The brake pedal should not get too close to the floor
when the brakes are applied.
Head restraints • Do the head restraints move smoothly and lock
securely?
Hybrid transmission “Park”
mechanism • When parked on a slope and the shift lever is in P, is
the vehicle securely stopped?
Indicators/buzzers • Do the indicators and buzzers function properly?
Lights • Do all the lights come on?
• Are the headlights aimed correctly?
* (  P. 511)
Parking brake • Does the parking brake switch operate normally?
• When parked on a slope and the parking brake is on,
is the vehicle securely stopped?
Seat belts •Do the seat belt s operate smoothly?
• The seat belts should not be damaged.
Seats • Do the seat controls operate properly?
Steering wheel • Does the steering wheel rotate smoothly?
• Does the steering wheel have the correct amount of
free play?
• There should not be an y strange sounds coming
from the steering wheel.

504 6-3. Do-it-yourself maintenance
RX450h_U_OM0E013U Change the rest position of the windshield wipers to the service position using
the wiper lever and then lift a windshield wiper. (  P. 2 6 3 )
While pressing and holding the
wiper blade lock release button,
remove the wiper blade. When performing this operation, make
sure to hold the hook portion of the
wiper arm securely.
While disengaging the cap lock,
using a tool such as a flathead
screwdriver if necessary, remove the
wiper insert. Hold the cap on the end of the wiper
insert when removing the wiper insert.
(The cap is integrated into the wiper
insert.)
If using a screwdriver, make sure to wrap
its tip with tape to protect the wiper
blade.
Install a new wiper insert. Make sure to push the wiper insert firmly until the cap lock is engaged.
After installation, check that the cap lock is locked securely.
Install the wiper blade to the wiper arm. Make sure to push the wiper blade until it is locked.
When performing this operation, make sure to hold the hook portion of the wiper arm
securely.
After installation, check that the wiper blade is locked securely.Windshield wiper inserts Replacing a windshield wiper insert 1
Hook portion12
Cap lock3
14
5

5176-3. Do-it-yourself maintenance
6
Maintenance and care
RX450h_U_OM0E013U Remove the light bulb.
Install a new light bulb and then
install the bulb base to the light
unit by inserting it and turning it
clockwise. After installing the bulb base, wiggle
it lightly to make sure it is securely
installed and turn the lights on to
visually check that there is no light
leaking from between the bulb base
and light unit.
Reinstall the fender liner and
install the 3 fender liner clips. 4
5
6

5196-3. Do-it-yourself maintenance
6
Maintenance and care
RX450h_U_OM0E013U Remove the light bulb.
Install a new light bulb and then
install the bulb base to the light
unit by inserting it and turning it
clockwise. After installing the bulb base, wiggle
it lightly to make sure it is securely
installed and turn on the turn signal
lights to visually check that there is no
light leaking from between the bulb
base and light unit.
Reinstall the fender liner and
install the 3 fender liner clips. 4
5
6

522 6-3. Do-it-yourself maintenance
RX450h_U_OM0E013U Install a new light bulb and then
install the bulb base to the light
unit by inserting it and turning it
clockwise. After installing the bulb base, wiggle
it lightly to make sure it is securely
installed and turn on the rear turn sig-
nal lights to visually check that there
is no light leaking from between the
bulb base and light unit.
Install the light unit. Align the tabs and push the light unit
toward the front of the vehicle to
install it.
Install the 2 screws.
Install the cover.
Remove the protective tape. 47
8
9
10
11

5236-3. Do-it-yourself maintenance
6
Maintenance and care
RX450h_U_OM0E013U ■
Back-up lights
Open the back door and remove
the cover. Using a flathead screwdriver, remove
the cover.
To prevent scratching to the vehicle,
wrap the tip of the flathead screw-
driver with a cloth, etc.
Turn the bulb base counterclock-
wise and remove it.
Remove the light bulb.
Install a new light bulb and then
install the bulb base to the light
unit by inserting it and turning it
clockwise. After installing the bulb base, wiggle
it lightly to make sure it is securely
installed and turn on the back-up
lights to visually check that there is no
light leaking from between the bulb
base and light unit. 1
2
3
4

5256-3. Do-it-yourself maintenance
6
Maintenance and care
RX450h_U_OM0E013U ■
LED lights
The headlight low beams, headlight high beams, front turn signal lights (vehicles with tri-
ple-beam headlights), parking lights and dayt ime running lights, front fog lights, corner-
ing lights (if equipped), front side marker lights (vehicles with tr iple-beam headlights),
side turn signal lights, stop/t ail lights, rear turn signal lig ht (vehicles with triple-beam
headlights), rear side marker lights, high moun ted stoplight, license plate lights, and outer
foot lights consist of a number of LEDs. If an y of the LEDs has burned out, take your vehi-
cle to your Lexus dealer to have the light replaced. ■
Condensation build-up on the inside of a lens
Temporary condensation build-up on the inside of the headlight lens does not indicate a
malfunction. Contact your Lexus dealer for mo re information in the following situations:●
Large drops of water have built up on the inside of a lens.●
Water has built up inside a headlight. ■
When replacing light bulbs
 P. 5 1 0
WA R N I N G ■
To p r e v e n t i n j u r y
Before performing any light bulb replacement procedure, be sure to turn the power
switch off. Failure to do so may result in burns from hot components or a part of your
body may get caught on an operating comp onent, possibly causing serious injury.■
Replacing light bulbs ●
Turn off the lights. Do not attempt to replace the bulb immediately after turning off the
lights.
The bulbs become very hot and may cause burns. ●
Do not touch the glass portion of the light bulb with bare hands. When it is unavoid-
able to hold the glass portion, use and ho ld with a clean dry cloth to avoid getting
moisture and oils on the bulb.
Also, if the bulb is scratched or dropped, it may blow out or crack.●
Fully install light bulbs and any parts used to secure them. Failure to do so may result
in heat damage, fire, or water entering the headlight unit. This may damage the head-
lights or cause condensation to build up on the lens.●
Do not attempt to repair or disassemble the light bulbs, connectors, electric circuits
or component parts.
Doing so may result in death or se rious injury due to electric shock.■
To prevent damage or fire ●
Make sure bulbs are fully seated and locked. ●
Check the wattage of the bulb before installin g to prevent heat damage.

534 7-2. Steps to take in an emergency
RX450h_U_OM0E013U NOTICE ■
To prevent damage to the vehicle when towing using a wheel-lift type truck●
Do not tow the vehicle from the rear when the power switch is off. The steering lock
mechanism is not strong enough to hold the front wheels straight.●
When raising the vehicle, ensure adequate ground clearance for towing at the oppo-
site end of the raised vehicle. Without adequate clearance, the vehicle could be dam-
aged while being towed. ■
To prevent damage to the vehicle when towing with a sling-type truck
Do not tow with a sling-type truck, either from the front or rear. ■
To prevent damage to the vehicle during emergency towing
Do not secure cables or chains to the suspension components. ■
Recreational towing (behind motor home, etc)
Never dinghy tow your vehicle to prevent caus-
ing serious damage to the Hybrid AWD system
(AWD models) and transmission. (  P. 2 3 1 )