2017 Lexus IS300h maintenance

5557-3. Do-it-yourself maintenance
7
Maintenance and care
IS300h_EE(OM53D89E)
■After a fuse is replaced
●If the lights do not turn on even after the fuse has been replaced, a bulb may need
replacement. ( P. 556)
●If the replaced fuse blows again, have the vehicle inspected by any authorized Lexus
retailer or Lexus authorized re pairer, or any reliable repairer.
■If there is an overload in a circuit
The fuses are designed to blow, protecting the wiring harness from damage.
■When replacing light bulbs
Lexus recommends that you use genuine Lexus products designed for this vehicle. Because certain bulbs are connected to circui ts designed to prevent overload, non-gen-
uine parts or parts not designed for this vehicle may be unusable.
WARNING
■To prevent system breakdowns and vehicle fire
Observe the following precautions.
Failure to do so may cause damage to th e vehicle, and possibly a fire or injury.
●Never use a fuse of a higher amperage rating than that indicated, or use any other object in place of a fuse.
●Always use a genuine Lexus fuse or equivalent.
Never replace a fuse with a wi re, even as a temporary fix.
●Do not modify the fuses or fuse boxes.
■Fuse box near the power control unit
Never check or replace the fuses as there are high voltage parts and wiring near the fuse box.
Doing so may cause electric shock, re sulting in death or serious injury.
NOTICE
■Before replacing fuses
Have the cause of electrical overload de termined and repaired by any authorized
Lexus retailer or Lexus authorized repairer, or any reliable repairer as soon as possible.

5567-3. Do-it-yourself maintenance
IS300h_EE(OM53D89E)
Check the wattage of the light bulb to be replaced. (P. 654)
Light bulbs
You may replace the following bulbs by yourself. The difficulty level of replace-
ment varies depending on the bulb. As there is a danger that components may
be damaged, we recommend that repl acement is carried out by any autho-
rized Lexus retailer or Lexus authori zed repairer, or any reliable repairer.
Preparing for light bulb replacement
Bulb locations
Front turn signal light (bulb type)
Outer foot light
1
2

5577-3. Do-it-yourself maintenance
7
Maintenance and care
IS300h_EE(OM53D89E)
■Front turn signal lights (bulb type)
For the left side only: Pinch the
clip to remove the washer fluid
filler opening.
Turn the bulb base counterclock-
wise.
Remove the light bulb.
Install a new light bulb then install
the bulb base to the light unit by
inserting it and turning the bulb
base clockwise.
After installing the light bulb, turn on the front turn signal light to visually
check that there is no light leaking
from the bulb base.
After replacing the left side bulb, insta ll the washer fluid filler opening to its
original position.
Replacing light bulbs
1
2
3
4
5

5587-3. Do-it-yourself maintenance
IS300h_EE(OM53D89E)
■Outer foot lights
Press the upper part of the out-
side rear view mirror to tilt the
mirror face upward, and apply
protective tape to the lower part
of the mirror cover.
Insert 2 flathead screwdrivers
wrapped in protective tape, and
disconnect the tabs behind the
mirror.
Pry the mirror out toward you, dis-
connecting the tabs 2 at a time.
Work carefully, ensuring that you do not drop the mirror.
Disconnect the connectors
behind the mirror, and remove
the mirror.
When removing the thin connectors,
make sure to mark one of the con-
nectors with a piece of tape, to avoid mixing them up when reinstalling.
Work carefully, ensuring that you do
not drop the mirror.
When handling the mirror, do not touch the parts applied with grease.
The number of connectors equipped differs by vehicle specification.
Remove the 5 screws and take off
the mirror’s outer cover and the
cover behind the mirror.
1
2
3
4

5597-3. Do-it-yourself maintenance
7
Maintenance and care
IS300h_EE(OM53D89E)
Turn the bulb base counterclock-
wise.
Remove the light bulb.
Install a new light bulb then install
the bulb base to the light unit by
inserting it and turning the bulb
base clockwise.
When inserting the socket, align the
marks printed on the light body and
the socket.
5
6
7

5607-3. Do-it-yourself maintenance
IS300h_EE(OM53D89E)
Install the visor cover on the mir-
ror frame, secure it with a screw,
and install the side turn signal light
and outer foot light.
Use only the screw position shown in
the illustration.
Align the tabs on the side turn signal
light unit and the co ver and install it.
Interlock the groove of the outer foot light unit with the tabs on the cover
and secure it.
After installing the outer foot light unit, turn on the outer foot light to
visually check that there is no light
leaking from the bulb base.
Disconnect the tabs, and sepa-
rate the top and bottom of the
outer cover of the mirror.
8
9

5617-3. Do-it-yourself maintenance
7
Maintenance and care
IS300h_EE(OM53D89E)
Install the outer cover of the mir-
ror by installing the lower side
first, then installing the upper side.
When installing the lower side of the
cover, insert the side turn signal light pin into the hole in the cover.
Secure the cover with screws and
reconnect the connectors back
together.
Secure the wire ha rness by reinstall-
ing it to the hooks on the back side of
the mirror surface as it was.
Align the tabs, and secure the
mirror by pushing in each diago-
nally-opposite pair of tabs in
order.
Make sure to insert the tabs in order
as shown in the illustration, and push
them in until a click is heard.
If you do not hear the click, do not
force the tabs in. Instead, remove the
mirror and check that the tabs are aligned.
After securing the mirror, remove the
protective tape applied to the lower part of the mirror cover.
10
11
12

5627-3. Do-it-yourself maintenance
IS300h_EE(OM53D89E)
■Replacing the following bulbs
If any of the lights listed below has burn t out, have it replaced by any autho-
rized Lexus retailer or Lexus authorized repairer, or any reliable repairer.
●Headlights
●Front position lights and daytime running lights
●Front turn signal lights (LED type)
●Side turn signal lights
●Stop/tail lights
●Tail lights
●Back-up light
●Rear turn signal lights
●Rear fog light
●High mounted stoplight
●License plate lights
■LED Lights
The lights other than the front turn signal lights (bulb type) and outer foot lights each con- sist of a number of LEDs. If any of the LEDs burn out, take your vehicle to any authorized
Lexus retailer or Lexus author ized repairer, or any reliable repairer to have the light
replaced.
■Condensation build-up on the inside of the lens
Temporary condensation build-up on the inside of the headlight lens does not indicate a
malfunction. Contact any authorized Lexus re tailer or Lexus authorized repairer, or any reliable repairer for more inform ation in the following situations:
●Large drops of water have built up on the inside of the lens.
●Water has built up inside the headlight.
■When replacing the front turn signal lights (bulb type)
When the washer fluid filler opening is remo ved with a large amount of washer fluid con-
tained in the washer tank, washer fluid may spill onto the vehicle and cleaning may be required.
■When replacing light bulbs
 P. 555