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5217-3. Do-it-yourself maintenance
7
Maintenance and care
NX300h_U_OM78007U ■
Situations in which the tire pressure warning system may not operate properly ●
In the following cases, the tire pressure warning system may not operate properly.
• If non-genuine Lexus wheels are used.
• A tire has been replaced with a tire that is not an OE (Original Equipment) tire.
• A tire has been replaced with a tire that is not of the specified size.
• Tire chains etc. are equipped.
• Lock nuts are equipped.
• An auxiliary-supported run-flat tire is equipped.
• If a window tint that affects the radio wave signals is installed.
• If there is a lot of snow or ice on the vehicle, particularly around the wheels or wheel
housings.
• If the tire inflation pressure is extremely higher than the specified level.
• If wheel without the tire pressure warning valve and transmitter is used.
• If the ID code on the tire pressure warning valves and transmitters is not registered
in the tire pressure warning computer. ●
Performance may be affected in the following situations.
• Near a TV tower, electric power plant, gas station, radio station, large display, air-
port or other facility th at generates strong radio waves or electrical noise
• When carrying a portable radio, cellular phone, cordless ph one or other wireless
communication device ●
When the vehicle is parked, the time taken for the warning to start or go off could be
extended. ●
When tire inflation pressure declines rapidly for example when a tire has burst, the
warning may not function. ■
The initialization operation ●
Make sure to carry out initialization af ter adjusting the tire inflation pressure.
Also, make sure the tires are cold before carry ing out initialization or tire inflation pres-
sure adjustment. ●
If you have accidentally turned the power swit ch off during initializat ion, it is not neces-
sary to press the reset switch again as init ialization will restart automatically when the
power switch has been turned to ON mode for the next time. ●
If you accidentally press the reset switch when initialization is not necessary, adjust the
tire inflation pressure to the specified leve l when the tires are co ld, and conduct initial-
ization again. ■
Warning performance of the tire pressure warning system
The warning of the tire pressure warning syst em will change in accordance with the con-
ditions under which it was initialized. For this reason, the system may give a warning even
if the tire pressure does not reach a low enough level, or if the pressure is higher than the
pressure that was adjusted to when the system was initialized. ■
When initialization of the tire pressure warning system has failed
Initialization can be completed in a few minutes. However, in the following cases, the set-
tings have not been recorded and the system will not operate properly. If repeated
attempts to record tire inflation pressure settings are unsuccessful, have the vehicle
inspected by your Lexus dealer. ●
When operating the tire pressure warning reset switch, the tire pressure warning light
does not blink 3 times. ●
After carrying out the initializ ation procedure, the tire pres sure warning light blinks for
1 minute then stays on after driving for 20 minutes.
Page 541 of 681
5417-3. Do-it-yourself maintenance
7
Maintenance and care
NX300h_U_OM78007U ■
Headlight high beams (halogen bulbs)
For the right side only:
Remove the bolt, and move the
washer fluid supply opening.
When it is difficult to work,
remove the washer fluid supply
opening.
Turn the cover counterclockwise
and remove it.
Turn the bulb base counterclock-
wise.Replacing light bulbs 1
2
3
Page 542 of 681
542 7-3. Do-it-yourself maintenance
NX300h_U_OM78007U Unplug the connector while pull-
ing the lock release.
Confirm whether the O-ring of
the cover has not come off. If the O-ring come off, attached to
the proper position.
Replace the light bulb, and set the
connector 4
5
6
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5437-3. Do-it-yourself maintenance
7
Maintenance and care
NX300h_U_OM78007U Install the bulb base. Align the 3 tabs on the light bulb with
the mounting, and insert. Turn it
clockwise to set.
Confirm the installation of the
bulb base. Shake the bulb base gently to check
that it is not loose, turn the headlight
high beams on once and visually
confirm that no light is leaking
through the mounting.
Install the cover and turn it clock-
wise. Align the of the cover to the
positioning mark of the lamp body
and insert and turn it.
There is the positioning mark on
the outer side of the light unit. 7
8
9
Page 545 of 681
5457-3. Do-it-yourself maintenance
7
Maintenance and care
NX300h_U_OM78007U ■
Front side marker light (bulb type)
Turn the bulb base counterclock-
wise.
Remove the light bulb.
When installing, reverse the steps listed.■
Front turn signal lights (bulb type)
Open the hood and remove the cover for engine compartment cover.
( P. 500, 503)
Remove the cover.
Push the center of the clip.
Remove the clip and cover.
Turn the bulb base counterclock-
wise. 1
2
3
1
2
1
2
3
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546 7-3. Do-it-yourself maintenance
NX300h_U_OM78007U Remove the light bulb.
Replace the light bulb.
Turn clockwise and set the bulb
base.
Attach the clip to the cover.
Push up on the center of the
clip.
Attach the clip. 4
5
6
7
1
2
Page 548 of 681
548 7-3. Do-it-yourself maintenance
NX300h_U_OM78007U Remove the light unit.
Attach 2 long pieces of the
masking tape and fold the
excess portion over in half.
Hold the section folded in half,
pull toward the rear of the lens
and remove.
Turn the bulb base counterclock-
wise.
Remove the light bulb. 4
1
2
5
6
Page 549 of 681
5497-3. Do-it-yourself maintenance
7
Maintenance and care
NX300h_U_OM78007U Replace the light bulb.
Turn clockwise and set the bulb
base. Confirm that cable is fixed to the tab.
Set the light unit.
Align the light unit with the 2
tabs on the rear bumper.
Push the light unit forward
while pushing A. Confirm that the grommet fits into
the bolt installation hole on the
light unit. 37
Ta b38
Grommet ATa b
Ta b9
1
2