engine oil TOYOTA PRIUS PLUG-IN HYBRID 2020 Owners Manual

15Pictorial index
Prius Plug-in Hybrid_OM_OM47D72E_(EE)
Windshield wipers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 398
Precautions against winter season . . . . . . . . . . . . . . . . . . . . . P. 566
Precautions against car wash . . . . . . . . . . . . . . . . . . . . . . . . . P. 618
Replacing the wiper insert . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 685
Fuel filler door . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 401
Refueling method . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 401
Fuel type/fuel tank capacity . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 772
Charging port . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 121
Charging method . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 152
Tires . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 650
Replacing. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 669
Tire size/inflation pressure . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 779
Winter tires/tire chain . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 566
Checking/rotation/tire pressure warning system . . . . . . . . . . . P. 650
Coping with flat tires . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 731
Hood . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 634
Opening . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 634
Engine oil . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 773
Coping with overheat . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 761
Headlights/front position lights/
daytime running lights . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 387
Front fog lights/rear fog lights . . . . . . . . . . . . . . . . . . . . . . . P. 397
Turn signal lights . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 385
Tail lights . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 387
License plate lights . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 387
Back-up lights
Shifting the shift position to R . . . . . . . . . . . . . . . . . . . . . . . . . P. 3794
5
6
7
8
Light bulbs of the exterior lights for driving
(Replacing method: P. 695, Watts: P. 779)
9
10
11
12
13
14

2153. Instrument cluster
3
Instrument cluster
Prius Plug-in Hybrid_OM_OM47D72E_(EE)
Warning lights inform the driver of malfunctions in any of the vehicle’s
systems.
Warning lights
Warning lightsPages
*1Brake system warning light (Red) P. 714
*1Brake system warning light (Yellow) P. 714
*1Charging system warning light P. 714
*1Low engine oil pressure warning light P. 715
*1Malfunction indicator lamp P. 715
*1SRS warning light P. 715
*1ABS warning light P. 715
*1Electric power steering system warning light
(Red/yellow) P. 715
*1, 2PCS warning light P. 716
LTA indicator (Orange) P. 716
*1Slip indicator light P. 716
*1High coolant temperature warning light P. 716
*1, 3PKSB OFF indicator (if equipped) P. 717
Open door warning light P. 717

3695-1. Before driving
Prius Plug-in Hybrid_OM_OM47D72E_(EE)
5
Driving
NOTICE
■ When encountering flooded roads
Do not drive on a road that has flooded after heavy rain etc. Doing so may
cause the following serious damage to the vehicle:
● Engine stalling
● Short in electrical components
● Engine damage caused by water immersion
In the event that you drive on a flooded road and the vehicle is flooded, be
sure to have any authorized Toyota retailer or Toyota authorized repairer, or
any reliable repairer check the following:
● Brake function
● Changes in quantity and quality of oil and fluid used for the engine, hybrid
transmission, etc.
● Lubricant condition for the bearings and suspension joints (where possi-
ble), and the function of all joints, bearings, etc.
If the shift control system is damaged by flooding, it may not be possible to
shift the shift position to P, or from P to other positions. When the shift posi-
tion cannot be changed from P to any other position, the front wheels will
lock, and you will be unable to tow the vehicle with the front wheels on the
ground, as the front wheels may be locked. In this case, transport the vehi-
cle with both front wheels or all four wheels lifted. ( P. 707)

5665-6. Driving tips
Prius Plug-in Hybrid_OM_OM47D72E_(EE)
Winter driving tips
●Use fluids that are appropriate to the prevailing outside tempera-
tures.
• Engine oil
• Engine/power control unit coolant
• Washer fluid
●Have a service technician inspect the condition of the 12-volt bat-
tery.
●Have the vehicle fitted with four snow tires or purchase a set of tire
chains for the front tires.
Ensure that all tires are the same size and brand, and that chains match
the size of the tires.
Perform the following according to the driving conditions:
●Do not try to forcibly open a window or move a wiper that is frozen.
Pour warm water over the frozen area to melt the ice. Wipe away
the water immediately to prevent it from freezing.
●To ensure proper operation of the climate control system fan,
remove any snow that has accumulated on the air inlet vents in
front of the windshield.
●Check for and remove any excess ice or snow that may have accu-
mulated on the exterior lights, vehicle’s roof, chassis, around the
tires or on the brakes.
●Remove any snow or mud from the bottom of your shoes before
getting in the vehicle.
Carry out the necessary preparations and inspections before
driving the vehicle in winter. Always drive the vehicle in a man-
ner appropriate to the prevailing weather conditions.
Preparation for winter
Before driving the vehicle

6317-3. Do-it-yourself maintenance
Prius Plug-in Hybrid_OM_OM47D72E_(EE)
7
Maintenance and care
Do-it-yourself service precautions
If you perform maintenance by yourself, be sure to follow the
correct procedure as given in these sections.
ItemsParts and tools
12-volt battery
condition
(P. 644)• Warm water • Baking soda • Grease
• Conventional wrench (for terminal clamp bolts)
• Distilled water
Engine/power
control unit
coolant level
(P. 641)• “Toyota Super Long Life Coolant” or a similar high
quality ethylene glycol-based non-silicate, non-
amine, non-nitrite and non-borate coolant with long-
life hybrid organic acid technology
“Toyota Super Long Life Coolant” is pre-mixed with
50% coolant and 50% deionized water.
• Funnel (used only for adding coolant)
Engine oil level
(P. 638)• “Toyota Genuine Motor Oil” or equivalent
• Rag or paper towel
• Funnel (used only for adding engine oil)
Fuses (P. 6 9 1 )• Fuse with same amperage rating as original
Hybrid battery
(traction battery)
air intake vent
(P. 623)
• Vacuum cleaner, etc.
• Flathead screwdriver
Light bulbs
(P. 695)
• Bulb with same number and wattage rating as origi-
nal
• Flathead screwdriver
• Wrench
Radiator and
condenser
(P. 643)

Tire inflation
pressure
(P. 665)• Tire pressure gauge
• Compressed air source
Washer fluid
(P. 648)• Water or washer fluid containing antifreeze (for win-
ter use)
• Funnel (used only for adding water or washer fluid)

6327-3. Do-it-yourself maintenance
Prius Plug-in Hybrid_OM_OM47D72E_(EE)
WARNING
The engine compartment contains many mechanisms and fluids that may
move suddenly, become hot, or become el ectrically energized. To avoid death
or serious injury, observe the following precautions.
■ When working on the engine compartment
● Make sure that the “Accessory”, “Ignition ON” or mileage display (P. 223)
on the main display and the “READY” indicator are both off.
● Keep hands, clothing and tools away from the moving fan.
● Be careful not to touch the engine, power control unit, radiator, exhaust
manifold, etc. right after driving as they may be hot. Oil and other fluids
may also be hot.
● Do not leave anything that may burn easily, such as paper and rags, in the
engine compartment.
● Do not smoke, cause sparks or expose an open flame to fuel. Fuel fumes
are flammable.
● Be extremely cautious when working on the 12-volt battery. It contains poi-
sonous and corrosive sulfuric acid.
● Take care because brake fluid can harm your hands or eyes and damage
painted surfaces. If fluid gets on your hands or in your eyes, flush the
affected area with clean water immediately. If you still experience discom-
fort, consult a doctor.
■ When working near the electric cooling fans or radiator grille
Be sure the power switch is off.
With the power switch in ON mode, the electric cooling fans may automati-
cally start to run if the air conditioning is on and/or the coolant temperature
is high. ( P. 643)
■ Safety glasses
Wear safety glasses to prevent flying or falling material, fluid spray, etc.
from getting in your eyes.

6377-3. Do-it-yourself maintenance
Prius Plug-in Hybrid_OM_OM47D72E_(EE)
7
Maintenance and care
Engine compartment
IO73PH114
Engine coolant reservoir
( P. 641)
Fuse boxes ( P. 691)
Engine oil level dipstick
( P. 638)
Engine oil filler cap ( P. 639)
Washer fluid tank ( P. 648)
12-volt battery ( P. 644)
Power control unit coolant
reservoir ( P. 641)
Radiator ( P. 643)
Condenser ( P. 643)
Electric cooling fans
1
2
3
4
5
6
7
8
9
10

6387-3. Do-it-yourself maintenance
Prius Plug-in Hybrid_OM_OM47D72E_(EE)
With the engine at operating temperature and turned off, check the oil
level on the dipstick.
■Checking the engine oil
Park the vehicle on level ground. 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.
Holding a rag under the end, pull the dipstick out and check the
oil level.
Low
Normal
Excessive
Wipe the dipstick and reinsert it fully.
Engine oil
1
2
3
4
5
1
2
3
6

6397-3. Do-it-yourself maintenance
Prius Plug-in Hybrid_OM_OM47D72E_(EE)
7
Maintenance and care
■Adding engine oil
If the oil level is below or near
the low level mark, add engine
oil of the same type as that
already in the engine.
Make sure to check the oil type and prepare the items needed
before adding oil.
Remove the oil filler cap by turning it counterclockwise.
Add engine oil slowly, checking the dipstick.
Install the oil filler cap by turning it clockwise.
■ Engine oil consumption
A certain amount of engine oil will be consumed while driving. In the following
situations, oil consumption may increase, and engine oil may need to be
refilled in between oil maintenance intervals.
● When the engine is new, for example directly after purchasing the vehicle or
after replacing the engine
● If low quality oil or oil of an inappropriate viscosity is used
● When driving at high engine speeds or with a heavy load, or when driving
while accelerating or decelerating frequently
● When leaving the engine idling for a long time, or when driving frequently
through heavy traffic
Engine oil selection P. 773
Oil quantity (Low  Full)1.5 L (1.6 qt., 1.3 lmp. qt.)
ItemsClean funnel
1
2
3

6407-3. Do-it-yourself maintenance
Prius Plug-in Hybrid_OM_OM47D72E_(EE)
WARNING
■Used engine oil
● Used engine oil contains potentially harmful contaminants which may
cause skin disorders such as inflammation and skin cancer, so care
should be taken to avoid prolonged 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 any authorized Toyota reta iler or Toyota authorized repairer,
or any reliable repairer, service station or auto parts store for information
concerning recycling or disposal.
● Do not leave used engine oil within the reach 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.