2017 TOYOTA PRIUS PRIME ABS

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PRIUS PRIME_OM_OM47A88U_(U)
5-5. Using the driving support systems
■Turning off both TRAC and VSC systems
To turn the TRAC and VSC systems off, press and hold for more than
3 seconds while the vehicle is stopped.
The VSC OFF indicator light will come on and the “Traction Control Turned
Off” will be shown on the multi-information display.
*
Press again to turn the systems back on.
*: Pre-collision brake assist and pre-collision braking will also be disabled.
The PCS warning light will come on and the message will be shown on the
multi-information display. ( →P. 654)
■ When the message is displayed on th e multi-information display show-
ing that TRAC has been disable d even if has not been pressed
TRAC cannot be operated. Contact your Toyota dealer.
■ Sounds and vibrations caused by the ABS, brake assist, VSC, TRAC and
hill-start assist control systems
●A sound may be heard from the engine compartment when the brake pedal
is depressed repeatedly, when the hybrid system is started or just after the
vehicle begins to move. This sound does not indicate that a malfunction has
occurred in any of these systems.
● Any of the following conditions may occur when the above systems are
operating. None of these indicates that a malfunction has occurred.
• Vibrations may be felt through the vehicle body and steering.
• A motor sound may be heard also after the vehicle comes to a stop.
■ ECB operating sound
ECB operating sound may be heard in the following cases, but it does not
indicate that a malfunction has occurred.
●Operating sound heard from the engine compartment when the brake pedal
is operated.
● Motor sound of the brake system heard from the front part of the vehicle
when the driver’s door is opened.
● Operating sound heard from the engine compartment when one or two min-
utes passed after the stop of the hybrid system.
■ EPS operation sound
When the steering wheel is operated, a motor sound (whirring sound) may be
heard. This does not indicate a malfunction.

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PRIUS PRIME_OM_OM47A88U_(U)
5-5. Using the driving support systems
WARNING
■The ABS does not operate effectively when
● The limits of tire gripping performance have been exceeded (such as
excessively worn tires on a snow covered road).
● The vehicle hydroplanes while driving at high speed on wet or slick road.
■ Stopping distance when the ABS is operating may exceed that of nor-
mal conditions
The ABS is not designed to shorten the vehicle’s stopping distance. Always
maintain a safe distance from the vehicle in front of you, especially in the
following situations:
● When driving on dirt, gravel or snow-covered roads
● When driving with tire chains
● When driving over bumps in the road
● When driving over roads with potholes or uneven surfaces
■ TRAC/VSC may not operate effectively when
Directional control and power may not be achievable while driving on slip-
pery road surfaces, even if the TRAC/VSC systems are operating.
Drive the vehicle carefully in conditions where stability and power may be
lost.
■ Hill-start assist control does not operate effectively when
● Do not overly rely on hill-start assist control. Hill-start assist control may
not operate effectively on steep inclines and roads covered with ice.
● Unlike the parking brake, hill-start assist control is not intended to hold the
vehicle stationary for an extended period of time. Do not attempt to use
hill-start assist control to hold the vehicle on an incline, as doing so may
lead to an accident.
■ When the TRAC, VSC an d/or ABS is activated
The slip indicator light flashes. Always drive carefully. Reckless driving may
cause an accident. Exercise particular care when the indicator light flashes.

PRIUS PRIME_OM_OM47A88U_(U)
4815-5. Using the driving support systems
5
Driving
WARNING
■When the TRAC/VSC syst ems are turned off
Be especially careful and drive at a speed appropriate to the road condi-
tions. As these are the systems to help ensure vehicle stability and driving
force, do not turn the TRAC/VSC systems off unless necessary.
■ Replacing tires
Make sure that all tires are of the specified size, brand, tread pattern and
total load capacity. In addition, make sure that the tires are inflated to the
recommended tire inflation pressure level.
The ABS, TRAC and VSC systems will not function correctly if different tires
are installed on the vehicle.
Contact your Toyota dealer for further information when replacing tires or
wheels.
■ Handling of tires and the suspension
Using tires with any kind of problem or modifying the suspension will affect
the driving assist systems, and may cause a system to malfunction.

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PRIUS PRIME_OM_OM47A88U_(U)
7-1. Maintenance and care
Clean the air intake vents and fil-
ters by the following procedures to
prevent dust from accumulating in
them, or to prevent them from
clogging.
The filters are attached to the back
side of the air intake vent grilles.
■
Cleaning the air intake vents and filters
Remove the dust from the vents
and filters with a vacuum
cleaner etc.
Clean the vents of the both
sides.
■
Cleaning the filters
If “Maintenance required for Traction battery cooling parts See
owner’s manual” is shown on the multi-information display, remove
the air intake vent grilles on the both sides of the rear seat and
clean the filters.
Insert a flathead screwdriver
etc. to the notch at the edge
of the grille to disconnect the
3 tabs, and remove the grille.
Turn over the rubber portion
beside the grille to insert the flat-
head screwdriver.
To prevent damage, cover the
tip of the flathead screwdriver
with a rag.
Cleaning the air intake vents and filters
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PRIUS PRIME_OM_OM47A88U_(U)
5637-1. Maintenance and care
7
Maintenance and care
Remove the filter.
Remove dust using a vac-
uum cleaner etc. to clean the
filter.
Also, remove dust on the grille
as well as on the filter using a
vacuum cleaner.
Reinstall the filter to the origi-
nal position.
Be careful not to deform the fil-
ter or allow a gap between the
filter and the installation posi-
tion when installing the filter.
Insert the tabs at the edge of
the grille to the positions, and
push the opposite side edge
in to secure the grille.
Reinstall the grille to the original
position while turning over the
rubber portion.
Start the hybrid system and check that the warning message on
the multi-informati on display disappears.
It may take several minutes before the warning message disappears.
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PRIUS PRIME_OM_OM47A88U_(U)
5917-3. Do-it-yourself maintenance
7
Maintenance and care
Remove the reservoir cap.
Add brake fluid slowly while checking the fluid level.
Make sure to check the fluid ty pe and prepare the necessary item.
■Brake fluid can absorb moisture from the air
Excess moisture in the brake fluid can cause a dangerous loss of braking effi-
ciency. Use only newly opened brake fluid.
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Fluid type FMVSS No.116 DOT 3 or SAE J1703 brake fluid
ItemsClean funnel
WARNING
■When filling the reservoir
Take care as brake fluid can harm your hands and 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 discomfort, see a doctor.
NOTICE
■If the brake fluid level is low or high
It is normal for the brake fluid level to go down slightly as the brake pads
wear out or when the fluid level in the accumulator is high.
If the reservoir needs frequent refilling, there may be a serious problem.

PRIUS PRIME_OM_OM47A88U_(U)
6137-3. Do-it-yourself maintenance
7
Maintenance and care
Pull the cover to disconnect the
tabs, and remove the cover.
Turn the portion to loosen
the jack, and slowly take out the
jack.
Be careful when handling the
jack, as it may become hot
depending on conditions.
(→ P. 611)
If the portion can not be loos-
ened, turn it using the jack han-
dle.
Taking out the jack
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PRIUS PRIME_OM_OM47A88U_(U)
7-3. Do-it-yourself maintenance
Install a new light bulb then
install the bulb base to the
light unit by inserting it and
turning the bulb base clock-
wise.
Reinstall the cover to the its original position, and attach the clip
inside of the cover.
Attach the clip on the cover,
then press the center portion
of the clip to lock.
Reinsert the cover end to the
rear bumper.
Make sure to secure the 2 tabs
on the cover end.
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