Page 426 of 568
426 4-3. Do-it-yourself maintenance
PRIUS v_OM_OM47820U_(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
Page 427 of 568
427
4-3. Do-it-yourself maintenance
PRIUS v_OM_OM47820U_(U)
4
Maintenance and care
■
Parking lights
Turn the bulb base counterclockwise.
Vehicles with halogen headlights
Vehicles with LED headlights
Remove the light bulb.
When installing, reverse the steps listed.
STEP 1
STEP 2
STEP 3
Page 428 of 568
428 4-3. Do-it-yourself maintenance
PRIUS v_OM_OM47820U_(U)
■Front side marker lights
Turn the bulb base counterclockwise.
Vehicles with halogen headlights
Vehicles with LED headlights
Remove the light bulb.
When installing, reverse the steps listed.
STEP 1
STEP 2
STEP 3
Page 435 of 568
435
4-3. Do-it-yourself maintenance
PRIUS v_OM_OM47820U_(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. Hold the
bulb by the plastic or metal portion.
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.
■ To prevent damage or fire
Make sure bulbs are fully seated and locked.
Page 450 of 568

450 5-2. Steps to take in an emergency
PRIUS v_OM_OM47820U_(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 headlightsThe 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
Page 479 of 568
5
When trouble arises
479
5-2. Steps to take in an emergency
PRIUS v_OM_OM47820U_(U)
Emergency start function
When the hybrid system does not start, the following steps can be
used as an interim measure to st art the hybrid system if the
“POWER” switch is functioning normally:
Set the parking brake.
Turn the “POWER” switch to ACCESSORY mode.
Press and hold the “POWER” switch for about 15 seconds
while depressing the brake pedal firmly.
Even if the hybrid system can be started using the above steps, the
system may be malfunctioning. Have the vehicle inspected by your
Toyota dealer.
■ The interior lights and headlights do not turn on, or the horn
does not sound
One of the following may be the cause of the problem:
●One or both of the 12-volt ba ttery terminals may be discon-
nected.
● The 12-volt battery may be discharged. ( P. 483)
Contact your Toyota dealer if the problem cannot be repaired, or if
repair procedures are unknown.
STEP 1
STEP 2
STEP 3
Page 486 of 568

486 5-2. Steps to take in an emergency
PRIUS v_OM_OM47820U_(U)
■Starting the hybrid system when the 12-volt battery is discharged
The hybrid system cannot be started by push-starting.
■ To prevent 12-volt battery discharge
● Turn off the headlights and the audio system while the hybrid system is
off.
● Turn off any unnecessary electrical components when the vehicle is run-
ning at a low speed for an extended period, such as in heavy traffic.
■ When the 12-volt battery is removed or discharged
● The hybrid system may not start. ( P. 388)
● If the 12-volt battery is depleted with the shift position in P, it will not be
possible to shift the shift position other than P. In this case, the vehicle
cannot be towed without lifting both front wheels because the front
wheels are locked by the parking lock. ( P. 439)
● When the 12-volt battery is reconnected, start the hybrid system, depress
the brake pedal, and confirm that it is possible to shift into each shift posi-
tion.
■ Charging the 12-volt battery
The electricity stored in the 12-volt battery will discharge gradually even
when the vehicle is not in use, due to natural discharge and the draining
effects of certain electrical appliances. If the vehicle is left for a long time, the
12-volt battery may discharge, and the hybrid system may be unable to start.
(The 12-volt battery recharges automatically while the hybrid system is oper-
ating.)
Page 508 of 568
508 6-1. Specifications
PRIUS v_OM_OM47820U_(U)
Light bulbs
A: H11 halogen bulbs
B: HB3 halogen bulbs
C: Wedge base bulbs (amber)
D: Wedge base bulbs (clear)
E: Double end bulbs
*
: If equipped
Light BulbsBulb No.WTy p e
Exterior Halogen headlights
Low beam
High beam
LED headlights High beam H11
HB3
HB3 55
60
60A
B
B
Fog lights
*H11 55 A
Front turn signal lights WY21W 21 C
Front side marker lights W5W 5 D
Parking lights W5W 5 D
Rear turn signal lights WY21W 21 C
Back-up lights W21W 21 D
License plate lights W5W 5 D
InteriorPersonal/interior lights
Vehicles without panoramic roof
Vehicles with panoramic roof
5
8D
D
Rear interior light 8E
Vanity lights 8D
Door courtesy lights 5D
Luggage compartment light 5E