2014 TOYOTA PRIUS V ECU

424 4-3. Do-it-yourself maintenance
PRIUS v_OM_OM47840U_(U)
Unplug the connector while
pressing the lock release.
Replace the light bulb, and install
the bulb base.
Align the 3 tabs on the light bulb
with the mounting, and insert.
Turn and secure the bulb base.
Shake the bulb base gently to
check that it is not loose, turn the
headlights on once and visually
confirm that no light is leaking
through the mounting.
STEP 2
STEP 3
STEP 4

433
4-3. Do-it-yourself maintenance
PRIUS v_OM_OM47840U_(U)
4
Maintenance and care
CAUTION
■
Replacing light bulbs
●Be sure to stop the hybrid system and turn off the lights. Do not attempt to
replace the bulb immediately after turning off the lights.
The bulbs become very hot and may cause burns.
● Do not touch the glass portion of the light bulb with bare hands. When i\
t is
unavoidable to hold the glass portion, use and hold with a clean dry cloth
to avoid getting moisture and oils on the bulb.
Also, if the bulb is scratched or dropped, it may blow out or crack.
● Fully install light bulbs and any parts used to secure them. Failure to do so
may result in heat damage, fire, or water entering the headlight unit. This
may damage the headlights or cause condensation to build up on the lens.
● Do not attempt to repair or disassemble light bulbs, connectors, electric
circuits or component parts.
Doing so may result in death or serious injury due to electric shock.
■ To prevent damage or fire
Make sure bulbs are fully seated and locked.

438 5-1. Essential information
PRIUS v_OM_OM47840U_(U)
Emergency towingIf a tow truck is not available in
an emergency, your vehicle may
be temporarily towed using a
cable or chain secured to the
emergency towing eyelet(s).
This should only be attempted
on hard surfaced roads for short
distances at under 18 mph
(30 km/h).
A driver must be in the vehicle to
steer and operate the brakes.
The vehicle’s wheels, drive train,
axles, steering and brakes must
be in good condition.

5
When trouble arises
439
5-1. Essential information
PRIUS v_OM_OM47840U_(U)
Installing towing eyelets
Remove the eyelet cover using a
flathead screwdriver.
To prevent damage, cover the tip
of the screwdriver with a rag.
Insert the towing eyelet into the
hole and tighten partially by
hand.
Tighten down the towing eyelet
securely using a wheel nut
wrench.
STEP 1
STEP 2
STEP 3

442 5-1. Essential information
PRIUS v_OM_OM47840U_(U)
CAUTION
■Caution while towing
●Use extreme caution when towing the vehicle.
Avoid sudden starts or erratic driving maneuvers which place excessive
stress on the emergency towing eyelets and the cables or chains. Always
be cautious of the surroundings and other vehicles while towing.
● Do not turn the “POWER” switch off.
This may lead to an accident as the front wheels will be locked by the
parking lock.
● If the hybrid system is off, the power assist for the brakes and steering will
not function, making steering and braking more difficult.
■ Installing towing eyelets to the vehicle
Make sure that towing eyelets are installed securely.
If not securely installed, towing eyelets may come loose during towing. This
may lead to accidents that cause serious injury or even death.
NOTICE
■To prevent damaging the vehicle
When raising the vehicle, ensure adequate ground clearance for towing at
the opposite end of the raised vehicle. Without adequate clearance, the
vehicle could be damaged while being towed.
■ To prevent causing serious damage to the hybrid transmission when
towing using a wheel-lift type truck
Never tow this vehicle from the rear with the front wheels on the ground.
■ To prevent body damage when towing with a sling-type truck
Do not tow with a sling-type truck, either from the front or rear.
■ To prevent causing serious damage to the hybrid transmission in
emergency towing
Never tow a vehicle from the rear with four wheels on the ground. This may
cause serious damage to the hybrid transmission.

5
When trouble arises
447
5-2. Steps to take in an emergency
PRIUS v_OM_OM47840U_(U)
Warning lightWarning light/Details
(Flashes)
(If equipped) Pre-collision syst
em warning light
Indicates a malfunction in the pre-collision system
The warning light will operate as follows, even when the
system is not malfunctioning:
• The light will flash quickly when the system is operating. (P. 256)
• The light will turn on when the pre-collision braking is disabled. ( P. 257)
• The light will turn on when the system cannot tempo- rarily be used. ( P. 450)
(Turns on) Slip indicator light
Indicates a malfunction in:
•VSC;
• TRAC; or
• Hill-start assist control
Flashes when the above systems are operating.
(P. 251)
Brake system warning light (yellow indicator)
Indicates a malfunction in:
• The regenerative braking system; or
• The electronically controlled brake system
Parking lock system warnin
g light (warning buzzer)
Indicates a malfunction in the P position control system
• In 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.
• The “POWER” switch may not be turned off. If this hap- pens, applying the parking brake will enable the switch
to be turned off.

448 5-2. Steps to take in an emergency
PRIUS v_OM_OM47840U_(U)
Warning lightWarning light/Details

(U.S.A)

(Canada) Parking lock system warn
ing message (warning
buzzer) Indicates a malfunction in the P position control system
when the vehicle is stopped
• In 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.
• The “POWER” switch may not be turned off. If this hap- pens, applying the parking brake will enable the switch
to be turned off.

(If equipped) LED headlight warning light
Indicates a malfunction in the LED headlights The LED headlights will not normally illuminate when
there is a malfunction, however it may be able to illumi-
nate depending on the nature of the problem.

(If equipped) Automatic headlight leveling system warning light
Indicates a malfunction in the automatic headlight level-
ing system

(If equipped) (yellow) Cruise control indicator
Indicates a malfunction in the cruise control/dynamic
radar cruise control

(If equipped) (yellow) Radar cruise control indicator
Indicates a malfunction in the dynamic radar cruise con-
trol

452 5-2. Steps to take in an emergency
PRIUS v_OM_OM47840U_(U)
*1: Refer to the separate “Scheduled Maintenance Guide” or “Owner’s ManualSupplement” for the maintenance interval applicable to your vehicle.
*2: Open door warning buzzer:
The open door warning buzzer sounds to alert one or more of the doors is
not fully closed (with the vehicle having reached a speed of 3 mph [5km/h]).
*3: Seat belt warning buzzer:The seat belt warning buzzer sounds to alert the driver and/or front passen-
ger that their seat belts are not fastened. If the driver’s seat belt is not fas-
tened, the buzzer will sound for 6 seconds once the “POWER” switch is
turned to ON mode. If the vehicle reaches a speed of 12 mph (20 km/h), the
buzzer will sound once. If the seat belt is still unfastened after 30 seconds,
the buzzer will sound intermittently for 10 seconds. Then, if the seat belt is
still unfastened, the buzzer will sound in a different tone for 20 more sec-
onds.
■ SRS warning light
This warning light system monitors the airbag sensor assembly, front impact
sensors, side impact sensors (front door), side impact sensors (front), side
impact sensors (rear), driver’s seat position sensor, driver’s seat belt buckle
switch, front passenger occupant classification system (ECU and sensors),
“AIR BAG ON” indicator light, “AIR BA G OFF” indicator light, front passen-
ger’s seat belt buckle switch, seat belt pretensioner assemblies, airbags,
interconnecting wiring and power sources. ( P. 124)
■ Front passenger occupant classifi cation system (ECU and sensors),
seat belt reminder and warning buzzer
● If luggage is placed on the front passenger seat, the front passenger
occupant classification system (ECU and sensors) may cause the warn-
ing 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 front passenger occupant classifi-
cation system (ECU and sensors) may not detect a passenger, and the
warning light may not operate properly.