steering TOYOTA PRIUS V 2018 Repair Manual

4758-2. Steps to take in an emergency
PRIUS v_OM_OM47B78U_(U)
8
When trouble arises
Securely attach cables or chains to the towing eyelet.
Take care not to damage the vehicle body.
Enter the vehicle being towed and start the hybrid system.
If the hybrid system does not start, turn the power switch to ON mode.
Shift the shift position to N and release the parking brake.
■While towing
If the hybrid system is off, the power assist for the brakes and steering will not
function, making steering and braking more difficult.
■ Wheel nut wrench
Wheel nut wrench is instal led in luggage compartment. ( P. 507)
WARNING
Observe the following precautions.
Failure to do so may result in death or serious injury.
■When towing the vehicle
■ While towing
●When towing using cables or chains, avoid sudden starts, etc. which place
excessive stress on the towing eyelet, cables or chains. The towing eyelet,
cables or chains may become dam aged, broken debris may hit people and
cause serious damage.
● Do not turn the power switch off.
This may lead to an accident as the front wheels will be locked by the
parking lock.
■ Installing towing eyelets to the vehicle
●The towing eyelets are only for the vehicle equipped with them. Do not use
the towing eyelets for another vehicle, and do not use the towing eyelets
for this vehicle on another vehicle.
● Make sure that towing eyelets are installed securely.
If not securely installed, towing eyelets may come loose during towing.
5
6
7
Be sure to transport the vehicle with the
front wheels raised or with all four wheels
raised off the ground. If the vehicle is
towed with the front wheels contacting
the ground, the drivetrain and related
parts may be damaged or electricity gen-
erated by the operation of the motor may
cause a fire to occur depending on the
nature of the damage or malfunction.

4798-2. Steps to take in an emergency
PRIUS v_OM_OM47B78U_(U)
8
When trouble arises
SRS warning lightIndicates a malfunction in:
• The SRS airbag system;
• The front passenger occupant classification system; or
• The seat belt pretensioner system
 Have the vehicle inspected by your Toyota dealer
immediately.
ABS warning light
Indicates a malfunction in:
• The ABS; or
• The brake assist system
 Have the vehicle inspected by your Toyota dealer
immediately.
Electric power steering system warning light (warning
buzzer)
Indicates a malfunction in the EPS (Electric Power Steer-
ing) system
 Have the vehicle inspected by your Toyota dealer
immediately.
(Flashes or
illuminates)
(If equipped)
PCS warning light
Indicates a malfunction in the PCS (Pre-Collision System)
or that the system is temporarily unavailable due to the
vehicle being extremely hot/cold, or dirt around a front
sensor, etc.
 Follow the instructions displayed on the multi-infor-
mation display. ( P. 216, 478)
If the PCS (Pre-Collision System) or VSC (Vehicle Stability
Control) system is disabled, the PCS warning light will illu-
minate.
 P. 216
Slip indicator light
Indicates a malfunction in:
• The VSC system;
• The TRAC system; or
• The hill-start assist control system
 Have the vehicle inspected by your Toyota dealer
immediately.
The light will flash when the above systems and/or ABS
are operating.
Warning lightWarning light/Details/Actions

4808-2. Steps to take in an emergency
PRIUS v_OM_OM47B78U_(U)
LDA indicator (warning buzzer)Indicates that the LDA (Lane D eparture Alert with steering
control) system is not available temporarily or has
detected a malfunction when the warning light is illumi-
nated in yellow and a warning message is displayed on
the multi-information display.
 P. 226
High coolant temperature warning light
Changes from a flashing to a solid light when the engine
coolant temperature increases
 Immediately stop the vehicle in a safe place. ( P. 528)
(If equipped)
Automatic headlight leveling system warning light
Indicates a malfunction in the automatic headlight leveling
system
 Have the vehicle inspected by your Toyota dealer
immediately.
Open door warning light (warning buzzer)*2
Indicates that a door is not fully closed
 Check that all the doors are closed.
Low fuel level warning light
Indicates that remaining fuel is approximately 1.6 gal.
(6.0 L, 1.3 Imp.gal.) or less
 Refuel the vehicle.
Driver’s and front passenger’s seat belt reminder light
(warning buzzer)
*3
Warns the driver and/or front passenger to fasten their
seat belts
 Fasten the seat belt.
If the front passenger’s seat is occupied, the front
passenger’s seat belt also needs to be fastened to
make the warning light (warning buzzer) turn off.
Rear passengers’ seat belt reminder lights (warning
buzzer)
*4
Warns the rear passengers to fasten their seat belts
 Fasten the seat belt.
Master warning light
A buzzer sounds and the warning light comes on and
flashes to indicate that the master warning system has
detected a malfunction.
 P. 487
Warning lightWarning light/Details/Actions

4828-2. Steps to take in an emergency
PRIUS v_OM_OM47B78U_(U)
■SRS warning light
This warning light system monitors the airbag sensor assembly, front impact
sensors, side impact sensors (front), side impact sensors (front door), side
impact sensors (rear), driver’s seat position sensor, driver’s seat belt buckle
switch, front passenger occupant classification system (ECU and sensors),
“PASSENGER AIR BAG” indicator, front passenger’s seat belt buckle switch,
seat belt pretensioner assemblies, airbags, interconnecting wiring and power
sources. ( P. 4 1 )
■ Front passenger detection sensor, seat belt reminder and warning
buzzer
●If luggage is placed on the front passenger seat, the front passenger detec-
tion sensor may cause the warning light to flash and the warning buzzer to
sound even if a passenger is not sitting in the seat.
● If a cushion is placed on the seat, the sensor may not detect a passenger,
and the warning light may not operate properly.
■ Electric power steering system warning light (warning buzzer)
When the 12-volt battery charge becomes insufficient of the voltage tempo-
rarily drops, the electric power steering system warning light may come on
and the warning buzzer may sound.
■ If the malfunction indicator lamp comes on while driving
First check the following:
● Is the fuel tank empty?
If it is, fill the fuel tank immediately.
● Is the fuel tank cap loose?
If it is, tighten it securely.
The malfunction indicator lamp will go off after several driving trips.
If the malfunction indicator lamp does not go off even after several trips, con-
tact your Toyota dealer as soon as possible.

4848-2. Steps to take in an emergency
PRIUS v_OM_OM47B78U_(U)
WARNING
■If both the ABS and the brake system warning lights remain on
Stop your vehicle in a safe place immediately and contact your Toyota
dealer. The vehicle will become extrem ely unstable during braking, and the
ABS system may fail, which could cause an accident resulting in death or
serious injury.
■ When the electric power steerin g system warning light comes on
The steering wheel may become extremely heavy.
When steering wheel operations are heavier than usual, grip the steering
wheel firmly and operate it using more force than usual.
■
If the tire pressure warning light comes on
Be sure to observe the following precautions. Failure to do so could
cause a loss of vehicle control and result in death or serious injury.
●Stop your vehicle in a safe place as soon as possible. Adjust the tire
inflation pressure immediately.
●If the tire pressure warning light comes on even after tire inflation pres-
sure adjustment, it is probable that you have a flat tire. Check the tires.
If a tire is flat, change it with the spare tire and have the flat tire
repaired by the nearest Toyota dealer.
●Avoid abrupt maneuvering and braking. If the vehicle tires deteriorate,
you could lose control of the steering wheel or the brakes.
■If a blowout or sudden air leakage should occur
The tire pressure warning system may not activate immediately.

4888-2. Steps to take in an emergency
PRIUS v_OM_OM47B78U_(U)
Warning message and warning buzzer list
Warning messageDetails/Actions
Indicates that:
• There is a high possibility of a frontal collision;
or
• The pre-collision braking function is operatingA buzzer also sounds.
 Slow the vehicle by applying the brakes.
Indicates that your vehicle is nearing the vehicle
ahead (in vehicle-to-vehicle distance control
mode)
A buzzer also sounds.
 Slow the vehicle by applying the brakes.
Indicates that the vehicle has deviated from the
lane (while the LDA [Lane Departure Alert with
steering control] system is operating)
The lane line on the side the vehicle has devi-
ated from flashes in amber.
A buzzer also sounds.
 Check around the vehicle and back to
inside of the lane lines.
Indicates that the accelerator pedal is depressed
while the shift position is in N
A buzzer also sounds.
 Release the accelerator pedal and shift the
shift position to D or R.
Indicates that the accelerator pedal is depressed
to stop the vehicle on an upward slope etc.
A buzzer also sounds. If this continues, the
hybrid system may overheat.
 Release the accelerator pedal and depress
the brake pedal.
Indicates that the hybrid battery (traction battery)
power has dropped because a certain period of
time has elapsed after shifting the shift position to
N
A buzzer also sounds.
 Restart the hybrid system when starting
the vehicle.
(Yellow)
(Flashes)
(Flashes)
(Flashes)
(Flashes)

4898-2. Steps to take in an emergency
PRIUS v_OM_OM47B78U_(U)
8
When trouble arises
Indicates a malfunction in the shift control systemIn this situation, there is a possibility that the
parking lock mechanism will not work. When
parking, park the vehicle on a flat surface and
apply the parking brake securely. Also, it may
not be possible to turn the power switch off. If
this happens, applying the parking brake will
enable the switch to be turned off. A buzzer
also sounds.
 Have the vehicle inspected by your Toyota
dealer.
Indicates a malfunction in the hybrid system
A buzzer also sounds.
 Immediately stop the vehicle in a safe place
and contact your Toyota dealer.
Indicates that the hybrid battery (traction battery)
is low
A buzzer also sounds.
 When stopping the vehicle, shift the shift
position to P. The battery cannot be
charged with the shift position in N.
Indicates that the shift position was changed and
Drive-Start Control was operated while depress-
ing the accelerator pedal
A buzzer also sounds.
 Momentarily release the accelerator pedal.
Indicates that the LDA (Lane Departure Alert with
steering control) system has determined that the
driver does not have the hands on the steering
wheel while the steering control function is on
If the driver operates the steering wheel only a
small amount, the system may be unable to
detect the steering wheel operations and this
warning may be displayed.
 Firmly hold the steering wheel.
Warning messageDetails/Actions
(Flashes)
(Flashes)

4908-2. Steps to take in an emergency
PRIUS v_OM_OM47B78U_(U)
Indicates that steering control function is tempo-
rarily canceled due to the LDA (Lane Departure
Alert with steering control) system determining
that the driver does not have the hands on the
steering wheel while the steering control function
is onIf the driver operates the steering wheel only a
small amount, the system may be unable to
detect the steering wheel operations and this
warning may be displayed.
 Firmly hold the steering wheel.
Indicates that the radar sensor is dirty or covered
with ice
A buzzer also sounds.
 Clean the sensor.
Indicates that the dynamic radar cruise control
system cannot be used temporarily due to bad
weather
A buzzer also sounds.
 Use the radar cruise control system when it
becomes available again.
Indicates a malfunction in the dynamic radar
cruise control system
Press the “ON-OFF” button once to deactivate
the system, and then press the button again to
reactivate the system.
A buzzer also sounds.
 Have the vehicle inspected by your Toyota
dealer.
Indicates a malfunction in the LDA (Lane Depar-
ture Alert with steering control) system
A buzzer also sounds.
 Have the vehicle inspected by your Toyota
dealer.
Warning messageDetails/Actions
(Yellow)

4918-2. Steps to take in an emergency
PRIUS v_OM_OM47B78U_(U)
8
When trouble arises
The operation conditions of the camera sensor
(temperature, etc.) are not met.
When the operation co nditions of the cam-
era sensor (temperature, etc.) are met, the
following systems will become available.
• PCS (Pre-Collision System)
• LDA (Lane Departure Alert with steering con- trol) system
• Automatic High Beam
Indicates that the system is temporarily unavail-
able due to a malfunction in a sensor other than
the camera sensor A buzzer also sounds.
 Turn the LDA (Lane Departure Alert with
steering control) system off, wait for a little
while, and then turn the LDA (Lane Depar-
ture Alert with steering control) system
back on.
Dirt, rain, condensation, ice, snow, etc., are pres-
ent on the windshield in front of the camera sen-
sor.
The following systems will be temporarily unus-
able.
• PCS (Pre-Collision System)
• LDA (Lane Departure Alert with steering con-
trol) system
• Automatic High Beam
 Turn the system off, remove any dirt, rain,
condensation, ice, snow, etc., from the
windshield, and then turn the system back
on.
Indicates a malfunction in the pre-collision sys-
tem
A buzzer also sounds.
 Have the vehicle inspected by your Toyota
dealer immediately.
Warning messageDetails/Actions
(Yellow)
(Yellow)
(Yellow)

4998-2. Steps to take in an emergency
PRIUS v_OM_OM47B78U_(U)
8
When trouble arises
*: For the EV drive mode operating conditions (P. 173).
Indicates that the EV drive mode has been auto-
matically canceled
*
The reason the EV drive mode is not available
(the battery charge is low, speed is higher than
the EV drive mode operating speed range,
accelerator pedal is depressed too much) may
be displayed.
A buzzer also sounds.
 Drive the vehicle for a while.
Indicates that the LDA (Lane Departure Alert with
steering control) system cannot be used as the
vehicle speed is approximately 32 mph (50 km/h)
or less
Drive the vehicle at approximately 32 mph
(50 km/h) or more.
Indicates that LDA (Lane Departure Alert with
steering control) system cannot be used due to
the vehicle speed being too high
Slow down.
Displayed messageDetails/Actions
(Flashes
3 times)