2016 TOYOTA PRIUS V warning light

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PRIUS v_OM_OM47B12U_(U)
4-5. Using the driving support systems
WARNING
■Handling the radar sensor
Observe the following to ensure the cruise control system can function
effectively.
Otherwise, the system may not function correctly and could result in an
accident.
●Keep the sensor and grille cover clean at all times.
Clean the sensor and grille cover with a soft cloth so you do not mark or
damage them.
●Do not subject the sensor or surrounding area to a strong impact.
If the sensor moves even slightly off position, the system may become
inaccurate or malfunction. If the sensor or surrounding area is subject to a
strong impact, always have the area inspected and adjusted by a Toyota
dealer.
●Do not disassemble the sensor.
●Do not attach accessories or stickers to the sensor, grille cover or sur-
rounding area.
●Do not modify or paint the sensor and grille cover.
●If the sensor needs to be replaced, contact your Toyota dealer.

PRIUS v_OM_OM47B12U_(U)
2314-5. Using the driving support systems
4
Driving
■LDA indicator
Even if the LDA switch is pressed, when the LDA indicator does not come on
the system may have a malfunction. Have the vehicle inspected by your Toy-
ota dealer immediately.
■Alert buzzer for lane departure alert
Depending on the audio system sound level or air conditioning fan noise
while the audio system or air conditioning system is in use, it may be difficult
to hear the alert buzzer.
■After the vehicle has been parked in the sun
The LDA may not be available and a warning message will be displayed for a
while after driving has started. When the temperature in the cabin decreases
and the temperature around the camera sensor (P. 227) becomes suitable
for its operation, turn the LDA switch on again after a short time.
■If there are lane markers on only one side of the vehicle
The lane departure alert will not operate for the side on which lane markers
could not be recognized.
■Conditions in which the function may not operate correctly
In the following situations, the camera sensor may be unable to recognize
lane markers causing the lane departure alert function to operate incorrectly.
However, this does not indicate a malfunction.
●When there are shadows on the road running parallel with lane markers, or
if a shadow covers the lane markers
●When driving through an area with no lane markers, such as a toll booth, a
crossing or before a ticket checkpoint
●When the lane markers are broken, Botts’ dots (raised pavement markers)
or stones
●When lane markers are obscured or partially obscured by sand, dirt, etc.
●When driving on a road surface that is wet due to rain, previous rainfall,
standing water, etc.
●When the lane markers are yellow (These may be more difficult for the sys-
tem to recognize compared to white markers.)
●When the lane markers are on a curb, etc.
●When driving on a particularly bright road surface, such as concrete
●When driving on a road surface that is bright due to reflected light
●When driving in a location where the light level changes rapidly, such as the
entrance to or exit from a tunnel
●When sunlight or the headlights of oncoming vehicles are shining directly
into the camera lens
●When driving on roads that are branching or merging
●When driving on winding roads or roads that are uneven

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PRIUS v_OM_OM47B12U_(U)
4-5. Using the driving support systems
●When driving on rough or unpaved roads
●When driving on a sharp curve
●When lane markers are extremely narrow or extremely wide
●When the vehicle leans to one side an unusual amount due to a heavy load
or improper tire inflation pressure
●When the following distance between your vehicle and the vehicle ahead is
extremely short
●When the vehicle experiences strong up-and-down motion such as when
driving on an extremely rough road or on a seam in the pavement
●When headlight brightness at nighttime is reduced due to dirt on the lenses,
or when the headlights are misaligned
■When changing the tires
Depending on the tires used, such as snow tires, etc., sufficient performance
may not be maintainable.
■Warning messages for the LDA
Warning messages are used to indicate a system malfunction or to inform the
driver of the need for caution while driving. If a warning message is shown on
the multi-information display, read the message and follow the instructions.
Also, even if a warning message is displayed, it will not impede normal driv-
ing.

PRIUS v_OM_OM47B12U_(U)
2494-5. Using the driving support systems
4
Driving
■Turning off both TRAC/VSC systems
To turn the TRAC/VSC systems off, press and hold for more than 3 sec-
onds while the vehicle is stopped.
Vehicles without multi-information display
The “TRAC OFF” and VSC OFF indicator lights will come on.
Vehicles with multi-information display
The VSC OFF indicator light will come on and the message will be shown on
the multi-information display.
*
Press again to turn the systems back on.
*: On vehicles with pre-collision system, 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. 491)
■When the “TRAC OFF” indicator comes on/message is displayed on the
multi-information display showing that TRAC has been disabled even if
the VSC OFF switch 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
Any of the following conditions may occur when the above systems are oper-
ating. 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 after the vehicle comes to a stop.
●The brake pedal may pulsate slightly after the ABS is activated.
●The brake pedal may move down slightly after the ABS is activated.
■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 1 or 2 minutes
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 v_OM_OM47B12U_(U)
4-5. Using the driving support systems
■Reduced effectiveness of the EPS system
The effectiveness of the EPS system is reduced to prevent the system from
overheating when there is frequent steering input over an extended period of
time. The steering wheel may feel heavy as a result. Should this occur, refrain
from excessive steering input or stop the vehicle and turn the hybrid system
off. The EPS system should return to normal within 10 minutes.
■Automatic reactivation of TRAC system
After turning the TRAC system off, the system will be automatically re-
enabled in the following situations:
●When the power switch is turned off
●The TRAC will turn on when vehicle speed increases
■Electric power steering system warning light (warning buzzer)
P. 491
■Operating conditions of hill-start assist control
When the following four conditions are met, the hill-start assist control will
operate:
●The shift position is in a position other than P or N (when starting off forward/
backward on an upward incline).
●The vehicle is stopped.
●The accelerator pedal is not depressed.
●The parking brake is not engaged.
■Automatic system cancelation of hill-start assist control
The hill-start assist control will turn off in any of the following situations:
●Shift the shift position to P or N.
●The accelerator pedal is depressed.
●The parking brake is engaged.
●Approximately 2 seconds elapse after the brake pedal is released.

PRIUS v_OM_OM47B12U_(U)
2514-5. Using the driving support systems
4
Driving
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 may not operate effectively when
Directional control and power may not be achievable while driving on slip-
pery road surfaces, even if the TRAC system is 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 the hill-start assist control. The 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 VSC is activated
The slip indicator light flashes. Always drive carefully. Reckless driving may
cause an accident. Exercise particular care when the indicator light flashes.
■When the TRAC/VSC system is turned off
Be especially careful and drive at a speed appropriate to the road condi-
tions. As this is the system to help ensure vehicle stability and driving force,
do not turn the TRAC/VSC system off unless necessary.

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PRIUS v_OM_OM47B12U_(U)
4-5. Using the driving support systems
■Changing the alert timing of the pre-collision system
Each time the PCS switch is
pressed, the response to the
distance changes as follows.
Far
Middle
*
Near
*: Default setting
■
Turning off the pre-collision system
Press the PCS switch for 3 sec-
onds or more seconds.
The PCS warning light turns on
and a message is shown on the
multi-information display.
To turn on the system, press the
PCS switch again. The system
is set to ON each time the power
switch is turned to ON mode.
Changing the pre-collision system
1
2
3

PRIUS v_OM_OM47B12U_(U)
2574-5. Using the driving support systems
4
Driving
■Automatic cancelation of the pre-collision system
When a malfunction occurs due to sensor contamination, etc. that results in
the sensors being unable to detect obstacles, the pre-collision system will be
automatically disabled. In this case, the system will not activate even if there
is a collision possibility.
■When there is a malfunction in the system, or if the system is tempo-
rarily unusable
The PCS warning light flashes and a warning message is shown on the multi-
information display. If a warning message is shown on the multi-information
display, read the message and follow the instructions. (P. 490, 503)
■Certification for the pre-collision system
For vehicles sold in the U.S.A.
For vehicles sold in Canada