2012 TOYOTA PRIUS PLUS brake light

441 4-3. Do-it-yourself maintenance
4
Maintenance and care
PRIUS +_OM_OM47821E_(EE)
FUSEAmpereCircuit
14 STOP 10AStop lights, high mounted stop-
light, brake system, driver support
system
15 P FR DOOR 25A Power windows
16 D FR DOOR 25A Power windows
17 DOOR RR 25A Power windows
18 DOOR RL 25A Power windows
19 S/ROOF 30A Panoramic roof shades
20 ECU-IG NO.1 10AElectric cooling fans, multiplex
communication system
21 ECU-IG NO.2 10ADriver support system, Pre-crash
safety System, inside rear view
mirror, yaw rate & G sensor, brake
system, electric power steering,
navigation system, panoramic roof
shades, seat belt pretensioners,
audio system, emergency flash-
ers, turn signal lights, windshield
wipers, headlight cleaner
22 GAUGE 10AHeadlight leveling system, seat
belt reminder light, gauges and
meters
23 A/C 10A Air conditioning system
24 WASHER 15A Windshield washer
25 RR WIP 20A Rear window wiper and washer

442 4-3. Do-it-yourself maintenance
PRIUS +_OM_OM47821E_(EE)
FUSEAmpereCircuit
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, smart entry & start system
29 PANEL 10AAir conditioning system, emer-
gency flashers, seat heaters,
transmission, P position switch,
navigation system, intelligent park-
ing assist system, headlight
cleaner, seat belt reminder light,
headlight leveling system, glove
box light, clock, audio system,
head-up display
30 TAIL 10AHeadlight leveling system, front
position lights, tail lights, license
plate lights, front fog lights, rear
fog light

468
5-1. Essential information
PRIUS +_OM_OM47821E_(EE)
If you think something is wrong
If you notice any of the following symptoms, your vehicle probably
needs adjustment or repair. Contact any authorized Toyota dealer or
repairer, or another duly qualified and equipped professional as
soon as possible.
Visible symptoms
Fluid leaks under the vehicle
(Water dripping from the air conditioning after use is normal.)
Flat-looking tires or uneven tire wear
High engine coolant temperature warning light flashes or
comes on
Audible symptoms
Changes in exhaust sound
Excessive tire squeal when cornering
Strange noises related to the suspension system
Pinging or other noises related to the hybrid system
Operational symptoms
Engine missing, stumbling or running roughly
Appreciable loss of power
Vehicle pulls heavily to one side when braking
Vehicle pulls heavily to one side when driving on a level road
Loss of brake effectiveness, spongy feeling, pedal almost
touches the floor

5
469
When trouble arises
PRIUS +_OM_OM47821E_(EE)
5-2. Steps to take in an emergency
If a warning light tur ns on or a warning buzzer sounds
Stop the vehicle immediately. Continuing to drive the vehicle
may be dangerous.
The following warning indicates a possible problem in the brake sys-
tem. Immediately stop the vehicle in a safe place and contact any
authorized Toyota dealer or repairer, or another duly qualified and
equipped professional.
*1: Brake system warning buzzer:
When there is a possible problem that could affect braking performance, the
warning light will come on and a warning buzzer will sound.
*2: Parking brake engaged warning buzzer:
A buzzer will sound if the vehicle is driven at a speed of approximately 5 km/h
(3 mph) or more.
Warning lightWarning light/Details
Brake system warning light and warning buzzer (red
indicator)
*1, 2
• Low brake fluid
• Malfunction in the brake system
This light also comes on when the parking brake is not
released. If the light turns off after the parking brake is
fully released, the system is operating normally.
Calmly perform the following actions if any of the warning lights
comes on or flashes. If a light comes on or flashes, but then goes
off, this does not necessarily indicate a malfunction in the system.
However, if this continues to occur, have the vehicle inspected by
any authorized Toyota dealer or repairer, or another duly qualified
and equipped professional.

5
471 5-2. Steps to take in an emergency
When trouble arises
PRIUS +_OM_OM47821E_(EE)
Have the vehicle inspected by any authorized Toyota dealer or repairer,
or another duly qualified and equipped professional immediately.
Failure to investigate the cause of the following warnings may lead to
the system operating abnormally and possibly cause an accident.
Have the vehicle inspected by any authorized Toyota dealer or
repairer, or another duly qualified and equipped professional immedi-
ately.
Warning lightWarning light/Details
Malfunction indicator lamp
Indicates a malfunction in:
• The hybrid system;
• The electronic engine control system; or
• The electronic throttle control system
SRS warning light
Indicates a malfunction in:
• The SRS airbag system;
• The seat belt pretensioner system
ABS warning light
Indicates a malfunction in:
• The ABS; or
• The brake assist system
Electric power steering system warning light (warn-
ing buzzer)
Indicates a malfunction in the EPS system

472 5-2. Steps to take in an emergency
PRIUS +_OM_OM47821E_(EE)
Warning lightWarning light/Details
(Flashes)
(If equipped)Pre-crash safety system warning light
Indicates a malfunction in the pre-crash safety 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. 307)
• The light will turn on when the pre-crash braking is dis-
abled. (P. 308)
• The light will turn on when the system cannot temporar-
ily be used. (P. 476)
(Turns on)Slip indicator light
Indicates a malfunction in:
•VSC;
• TRC; or
• Hill-start assist control
Flashes when the above systems and/or ABS are oper-
ating. (P. 300)
Brake system warning light (yellow indicator)
Indicates a malfunction in:
• The regenerative braking system; or
• The electronically controlled brake system

5
473 5-2. Steps to take in an emergency
When trouble arises
PRIUS +_OM_OM47821E_(EE)
Warning lightWarning light/Details
Parking lock system warning 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.
Parking lock system warning 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.
Hybrid battery indicator light
The hybrid battery (traction battery) will soon need to be
inspected or replaced
Have the hybrid battery (traction battery) inspected by
any authorized Toyota dealer or repairer, or another
duly qualified and equipped professional immediately.
*

478 5-2. Steps to take in an emergency
PRIUS +_OM_OM47821E_(EE)
Electric power steering system warning light (warning buzzer)
When the 12-volt battery charge becomes insufficient or the voltage tempo-
rarily drops, the electric power steering system warning light may come on
and the warning buzzer sounds.
If the malfunction indicator lamp comes on while driving
The malfunction indicator lamp will come on if the fuel tank becomes com-
pletely empty. If the fuel tank is empty, refuel the vehicle immediately. The
malfunction indicator lamp will go off after several trips.
Customization
The vehicle speed linked seat belt reminder buzzer can be disabled.
(Customizable features P. 554) However, Toyota recommends that the
seat belt reminder buzzer be operational to alert the driver and front passen-
ger when seat belts are not fastened.
CAUTION
If both the ABS and the brake system warning lights remain on
Stop your vehicle in a safe place immediately and contact any authorized
Toyota dealer or repairer, or another duly qualified and equipped profes-
sional. The vehicle will become extremely unstable during braking, and the
ABS system may fail, which could cause an accident resulting in death or
serious injury.
When the electric power steering system warning light comes on
The steering wheel may become extremely heavy.
If the steering wheel becomes heavier than usual when operating, hold
firmly and operate using more force than usual.