2015 TOYOTA PRIUS ECU

475
4-3. Do-it-yourself maintenance
PRIUS_OM_OM47A17U_DVD_(U)
4
Maintenance and care
FUSEAmpereCircuit
24 WASHER 15A Windshield washer
25 RR WIP 20A Rear window wiper and washer
26 WIP 30A Windshield wipers
27 MET 7.5A Gauges and meters
28 IGN 10ABrake system, driver support sys-
tem, multiport fuel injection sys-
tem/sequential multiport fuel
injection system, SRS airbag sys-
tem, front passenger occupant
classification system (ECU and
sensors), power management sys-
tem, smart key system, front pas-
senger’s seat belt reminder light
29 PANEL 10AAir conditioning system, personal
light, transmission, P position
switch, navigation system, Solar
Ventilation System, Remote Air
Conditioning System, advanced
parking guidance system, head-
light cleaner, front passenger’s
seat belt reminder light, headlight
leveling system, glove box light,
clock, audio system, MPH or km/h
switch
30 TAIL 10AHeadlight leveling system, park-
ing lights, tail lights, license plate
lights, front fog lights, side marker
lights

480 4-3. Do-it-yourself maintenance
PRIUS_OM_OM47A17U_DVD_(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.
ITO43P163
STEP 2
STEP 3
STEP 4

482 4-3. Do-it-yourself maintenance
PRIUS_OM_OM47A17U_DVD_(U)
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 3
STEP 4

492 4-3. Do-it-yourself maintenance
PRIUS_OM_OM47A17U_DVD_(U)
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.

498 5-1. Essential information
PRIUS_OM_OM47A17U_DVD_(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. This should only be attempted on hard surfaced roads
for short distances at low speeds.
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.
Emergency towing procedure
Take out the towing eyelet. ( P. 537)
Remove the eyelet cover using a
flathead screwdriver.
To protect the bodywork, place a
rag between the screwdriver and
the vehicle body as shown in the
illustration.
Insert the towing eyelet into the
hole and tighten partially by
hand.
STEP 1
STEP 2
STEP 3

5
When trouble arises
499
5-1. Essential information
PRIUS_OM_OM47A17U_DVD_(U)
Tighten down the towing eyelet
securely using a wheel nut
wrench or hard metal bar.
Securely attach a cable or chain 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.
STEP 4
■ 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 installed under the center auxiliary box. ( P. 537)
STEP 5
STEP 6
STEP7

500 5-1. Essential information
PRIUS_OM_OM47A17U_DVD_(U)
CAUTION
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 damaged, 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
Make sure that towing eyelets are installed securely.
If not securely installed, towing eyelets may come loose during towing.
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 driv-
etrain and related parts may be damaged
or electricity generated by the operation
of the motor may cause a fire to occur
depending on the nature of the damage
or malfunction.

510 5-2. Steps to take in an emergency
PRIUS_OM_OM47A17U_DVD_(U)
*1: 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 [5 km/h]).
*2: Seat belt warning buzzer:The driver’s and front passenger’s seat belts reminder sounds to alert the
driver and front passenger that his or her seat belt is not fastened. The
buzzer sounds intermittently for 10 seconds after the vehicle has reached a
speed of at least 12 mph (20 km/h). Then, if the seat belt is still unfastened,
the buzzer will sound in a different tone for 20 more seconds.
■ 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. 141)
■ 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.