2018 TOYOTA PRIUS PLUG-IN HYBRID warning light

661
8When trouble arises
PRIUS PHV_OM_OM47C99E_(EE)
8-1. Essential information
Emergency flashers ........... 662
If your vehicle has to
be stopped in an
emergency ....................... 663
8-2. Steps to take in an
emergency
If your vehicle needs
to be towed ...................... 664
If you think something is
wrong ............................... 670
If a warning light turns on
or a warning buzzer
sounds ............................. 671
If a warning message is
displayed ......................... 680
If you have a flat tire .......... 688
If the hybrid system will
not start............................ 706
If the electronic key does
not operate properly ........ 708
If the 12-volt battery is
discharged ....................... 712
If your vehicle
overheats ......................... 718
If the vehicle becomes
stuck ................................ 723

6708-2. Steps to take in an emergency
PRIUS PHV_OM_OM47C99E_(EE)
If you think something is wrong
●Fluid leaks under the vehicle
(Water dripping from the air conditioning after use is normal.)
● Flat-looking tires or uneven tire wear
● High coolant temperature warning light flashes or comes on
● 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
● 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
If you notice any of the following symptoms, your vehicle proba-
bly needs adjustment or repair. Contact any authorized Toyota
retailer or Toyota authorized repairer, or any reliable repairer as
soon as possible.
Visible symptoms
Audible symptoms
Operational symptoms

6718-2. Steps to take in an emergency
PRIUS PHV_OM_OM47C99E_(EE)
8
When trouble arises
If a warning light turns on or a warning
buzzer sounds
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 retailer or Toyota authorized
repairer, or any reliable repairer.
Warning light and warning buzzer list
Warning lightWarning light/Details/Actions
Brake system warning light and warning buzzer (red
indicator)*1
Indicates that:
• The brake fluid level is low; or
• The brake system is malfunctioning
 Immediately stop the vehicle in a safe place and con-
tact any authorized Toyota retailer or Toyota autho-
rized repairer, or any reliable repairer. Continuing to
drive the vehicle may be dangerous.
Brake system warning light (yellow indicator)
Indicates a malfunction in:
• The regenerative braking system; or
• The electronically controlled brake system
 Have the vehicle inspected by any authorized Toyota
retailer or Toyota authorized repairer, or any reliable
repairer immediately.
Charging system warning light
Indicates a malfunction in the vehicle’s charging system
 Immediately stop the vehicle in a safe place and con-
tact any authorized Toyota retailer or Toyota autho-
rized repairer, or any reliable repairer.

6728-2. Steps to take in an emergency
PRIUS PHV_OM_OM47C99E_(EE)
Low engine oil pressure warning light
(warning buzzer)*2
Indicates that the engine oil pressure is too low
 Immediately stop the vehicle in a safe place and con-
tact any authorized Toyota retailer or Toyota autho-
rized repairer, or any reliable repairer.
Malfunction indicator lamp
Indicates a malfunction in:
• The hybrid system;
• The electronic engine control system; or
• The electronic throttle control system
 Have the vehicle inspected by any authorized Toyota
retailer or Toyota authorized repairer, or any reliable
repairer immediately.
SRS warning light
Indicates a malfunction in:
• The SRS airbag system; or
• The seat belt pretensioner system
 Have the vehicle inspected by any authorized Toyota
retailer or Toyota authorized repairer, or any reliable
repairer immediately.
ABS warning light
Indicates a malfunction in:
• The ABS; or
• The brake assist system
 Have the vehicle inspected by any authorized Toyota
retailer or Toyota authorized repairer, or any reliable
repairer immediately.
(Red/yellow)
Electric power steering system warning light (warning
buzzer)
Indicates a malfunction in the EPS (Electric Power Steer-
ing) system
 Have the vehicle inspected by any authorized Toyota
retailer or Toyota authorized repairer, or any reliable
repairer immediately.
Warning lightWarning light/Details/Actions

6738-2. Steps to take in an emergency
PRIUS PHV_OM_OM47C99E_(EE)
8
When trouble arises
(Flashes or illuminates)
PCS warning light
Indicates a malfunction in the PCS (Pre-Crash Safety sys-
tem) or that the system is temporarily unavailable due to
the vehicle being extremely hot/cold, or dirt around a front
sensor, etc. ( P. 406, 680)
 Follow the instructions displayed on the multi-infor-
mation display. ( P. 406, 680)
If the PCS (Pre-Crash Safety system) or VSC (Vehicle
Stability Control) system is disabled, the PCS warning light
will illuminate.
 P. 406
Slip indicator light
Indicates a malfunction in:
• The VSC system;
• The TRC system; or
• The hill-start assist control system
 Have the vehicle inspected by any authorized Toyota
retailer or Toyota authorized repairer, or any reliable
repairer immediately.
The light will flash when the ABS, VSC or TRC system is
operating.
High coolant temperature warning light
• When the light flashes:
Indicates that the engine coolant temperature is too high
The light changes from a flashing to a solid light when
the temperature further increases
 Immediately stop the vehicle in a safe place.
( P. 718)
• When the light comes on without flashing:
Indicates a malfunction in the exhaust heat recirculator
system
 Have the vehicle inspected by any authorized Toyota
retailer or Toyota authorized repairer, or any reliable
repairer immediately.
Warning lightWarning light/Details/Actions

6748-2. Steps to take in an emergency
PRIUS PHV_OM_OM47C99E_(EE)
(Flashes) (If equipped)
ICS OFF indicator
Indicates a malfunction in the Intelligent Clearance Sonar
function
 Have the vehicle inspected by any authorized Toyota
retailer or Toyota authorized repairer, or any reliable
repairer.
The warning light will operate as follows, even when the
system is not malfunctioning:
• The light will come on when the Intelligent Clearance
Sonar function is turned off ( P. 472)
• The light will come on when the Intelligent Clearance
Sonar function is operating ( P. 476)
• The light will flash when the system cannot temporarily
be used ( P. 480)
Open door warning light (warning buzzer)*3
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 6.4 L
(1.7 gal., 1.4 Imp.gal.) or less
 Refuel the vehicle.
Driver’s and front passenger’s seat belt reminder light
(warning buzzer)*4
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 light (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. 680
Warning lightWarning light/Details/Actions

6758-2. Steps to take in an emergency
PRIUS PHV_OM_OM47C99E_(EE)
8
When trouble arises
Tire pressure warning light
When the light comes on:
Low tire inflation pressure such as
• Natural causes ( P. 678)
• Flat tire ( P. 688)
 Adjust the tire inflation pressure to the specified
level.
The light will turn off after a few minutes. In case the
light does not turn off even if the tire inflation pres-
sure is adjusted, have the system checked by any
authorized Toyota retailer or Toyota authorized
repairer, or any reliable repairer.
When the light comes on after blinking for 1 minute:
Malfunction in the tire pressure warning system ( P. 678)
 Have the system checked by any authorized Toyota
retailer or Toyota authorized repairer, or any reliable
repairer.
Warning lightWarning light/Details/Actions

6768-2. Steps to take in an emergency
PRIUS PHV_OM_OM47C99E_(EE)
Brake Override System/Drive-Start Control/
Intelligent Clearance Sonar (symbol display)*5
Brake Override System
Indicates that the accelerator and brake pedals are being
depressed simultaneously, and the Brake Override Sys-
tem is operating
 Release the accelerator pedal and depress the brake
pedal.
Indicates a malfunction in the Brake Override System
(with warning buzzer)
 Have the vehicle inspected by any authorized Toyota
retailer or Toyota authorized repairer, or any reliable
repairer immediately.
Drive-Start Control
Indicates that the shift position was changed and Drive-
Start Control was operated while depressing the accelera-
tor pedal (with warning buzzer)
 Momentarily release the accelerator pedal.
Indicates a malfunction in the Drive-Start Control system
(with warning buzzer)
 Have the vehicle inspected by any authorized Toyota
retailer or Toyota authorized repairer, or any reliable
repairer immediately.
Intelligent Clearance Sonar
Indicates that the Intelligent Clearance Sonar (if equipped)
is operating ( P. 476)
 Follow the instruction that is displayed on the multi-
information display.
Warning lightWarning light/Details/Actions