engine LEXUS NX300h 2015 Workshop Manual

506 7-3. Do-it-yourself maintenance
NX300h_U_OM78007U ■
After changing the engine oil
The engine oil maintenance da ta should be reset. Perform the following procedures:
Press of the meter control switch.
Press or of the meter control switch,
select , and then press .
Press or of the meter control switch,
select the “Oil Mainte nance” screen and then
press and hold the .
Select the “Yes” and push .
A message is displayed on the multi-informa-
tion display. 1
2
3
4
5

5077-3. Do-it-yourself maintenance
7
Maintenance and care
NX300h_U_OM78007U WA R N I N G ■
Used engine oil ●
Used engine oil contains potentially harm ful contaminants which may cause skin dis-
orders such as inflammation and skin canc er, so care should be taken to avoid pro-
longed and repeated contact. To remove used engine oil from your skin, wash
thoroughly with soap and water. ●
Dispose of used oil and filters only in a safe and acceptable manner. Do not dispose of
used oil and filters in household trash, in sewers or onto the ground. Call your Lexus
dealer, service station or auto parts store for information concerning recycling or dis-
posal. ●
Do not leave used engine oil within the reac h of children.
NOTICE ■
To prevent serious engine damage
Check the oil level on a regular basis. ■
When replacing the engine oil ●
Be careful not to spill engine oil on the vehicle components. ●
Avoid overfilling, or the engine could be damaged.●
Check the oil level on the dipstick every time you refill the vehicle. ●
Be sure the engine oil filler cap is properly tightened.

508 7-3. Do-it-yourself maintenance
NX300h_U_OM78007U The coolant level is satisfactory if it is between the “FULL” and “LOW” lines on
the reservoir when the hybrid system is cold. ■
Engine coolant reservoir
Reservoir cap
“FULL” line
“LOW” line If the level is on or below the “LOW”
line, add coolant up to the “FULL”
line. (  P. 6 0 0 )
■
Power control unit coolant reservoir
Reservoir cap
“FULL” line
“LOW” line If the level is on or below the “LOW”
line, add coolant up to the “FULL”
line.■
Coolant selection
Only use “Toyota Super Long Life Coolant” or a similar high qu ality ethylene glycol
based non-silicate, non-amine, non-nitrite, and non-borate coolant with long-life hybrid
organic acid technology.
U.S.A.:
“Toyota Super Long Life Coolant” is a mixt ure of 50% coolant and 50% deionized water.
(Minimum temperature: -31  F [-35  C])
Canada:
“Toyota Super Long Life Coolant” is a mixt ure of 55% coolant and 45% deionized water.
(Minimum temperature: -44  F [-42  C])
For more details about coolant, contact your Lexus dealer. ■
If the coolant level drops within a short time of replenishing
Visually check the radiator, hoses, engine/p ower control unit coolant reservoir caps,
drain cock and water pump.
If you cannot find a leak, have your Lexus dealer test the cap and check for leaks in the
cooling system.Coolant 1
2
3
1
2
3

5097-3. Do-it-yourself maintenance
7
Maintenance and care
NX300h_U_OM78007U Check the radiator and condenser and clear away any foreign objects.
If either of the above parts is extremely dirty or you are not sure of their condi-
tion, have your vehicle inspected by your Lexus dealer. WA R N I N G ■
When the hybrid system is hot
Do not remove the engine/power control unit coolant reservoir caps.
The cooling system may be under pressure and may spray hot coolant if the cap is
removed, causing serious injuries, such as burns.
NOTICE ■
When adding coolant
Coolant is neither plain water nor straight antifreeze. The correct mixture of water and
antifreeze must be used to provide proper lubrication, corrosion protection and cool-
ing. Be sure to read the antifreeze or coolant label. ■
If you spill coolant
Be sure to wash it off with water to prevent it from damaging parts or paint.
Radiator and condenser WA R N I N G ■
When the hybrid system is hot
Do not touch the radiator or condenser as they may be hot and cause serious injuries,
such as burns. ■
When the electric cooling fans are operating
Do not touch the engine compartment.
With the power switch in ON mode, the electric cooling fans may automatically start to
run if the air conditioning is on and/or the coolant temperature is high. Be sure the
power switch is off when working near the electric cooling fans or radiator grille.

5117-3. Do-it-yourself maintenance
7
Maintenance and care
NX300h_U_OM78007U If none of the washer do not work or the
“Windshield Washer Fluid Low” on the
multi-information display, the washer
tank may be empty. Add washer fluid.Washer fluid
WA R N I N G ■
When adding washer fluid
Do not add washer fluid when the hybrid system is hot or operating as washer fluid
contains alcohol and may catch fire if spilled on the engine etc.
NOTICE ■
Do not use any fluid other than washer fluid
Do not use soapy water or engine antifreeze instead of washer fluid.
Doing so may cause streaking on the vehicle’s painted surfaces.■
Diluting washer fluid
Dilute washer fluid with water as necessary.
Refer to the freezing temperatures listed on the label of the washer fluid bottle.

534 7-3. Do-it-yourself maintenance
NX300h_U_OM78007UChecking and replacing fuses Turn the power switch off.
Open the fuse box cover.If any of the electrical components do not operate, a fuse may have blown. If
this happens, check and replace the fuses as necessary. 1
2 
Engine compartment: type A fuse
box 
Engine compartment: type B fuse
box
Push the tab in and lift the lid off. Push the tab in and lift the lid off. 
Left side instrument panel
Remove the lid.

538 7-3. Do-it-yourself maintenance
NX300h_U_OM78007ULight bulbs Check the wattage of the light bulb to be replaced. (  P. 6 1 7 )
 P. 5 0 3
 P. 1 3 2You may replace the following bulbs by yourself. The difficulty level of replace-
ment varies depending on the bulb. If necessary bulb replacement seems diffi-
cult to perform, contact your Lexus dealer.
For more information about replacing other light bulbs, contact your Lexus
dealer.
Preparing for light bulb replacement
Removing the engine compartment cover
Canceling the power back door system

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

5477-3. Do-it-yourself maintenance
7
Maintenance and care
NX300h_U_OM78007U Attach the cover.
Align the 2 tabs positions and
close the cover.
Fix the cover by pushing the
center of the clip.
Install the engine compartment cover. (  P. 5 0 3 )■
Rear turn signal lights
Open the back door and attach
protective tape around the lamp
body. (Use masking tape, do not
use Duct tape, as duct tape may
leave markings.)
Remove the cover. It is recommended for safeguarding
to wrap the tip of the screwdriver
with a cloth, etc., in order to prevent
scratches to the vehicle.
Remove the 2 bolts. 8
1
2
9
1
2
3

552 7-3. Do-it-yourself maintenance
NX300h_U_OM78007U ■
Replacing the following bulbs
If any of the lights listed below has burnt out, have it replaced by your Lexus
dealer. ●
Headlight low beams ●
Headlight high beams (LED type) ●
Front turn signal lights (LED type) ●
Parking lights and Daytime running lights ●
Front fog lights ●
Front side marker lights (LED type) ●
Side turn signal lights ●
Stop/tail lights ●
Rear side marker lights ●
High mounted stoplight ●
License plate lights ●
Outer foot lights ■
After replacing the bulbs
■
LED lights
The headlight low beams, headlight high beams (LED Type), front turn signal lights (LED
Type), parking lights, daytime running lights, front fog lights, front side marker lights (LED
Type), side turn signal lights, rear side ma rker lights, stop/tail lights, rear side marker
lights, high mounted stoplight and license plate lights, outer foot lights consist of a num-
ber of LEDs. If any of the LEDs burn out, take your vehicle to your Lexus dealer 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 your Lexus dealer for mo re information in the following situations:●
Large drops of water have built up on the inside of the lens.●
Wa t e r h a s b u i l t u p i n side the headlight.■
When replacing light bulbs
 P. 5 3 6After removing the engine compartment cover,
return the cover to original position with the
clips.
Insert
Press 1
2