2021 TOYOTA SIENNA HYBRID display

4466-3. Do-it-yourself maintenance
NOTICE
■When cleaning the air intake
vents
When cleaning the air intake
vents, make sure to only use a
vacuum to suck out dust and
clogs. If a compressed air blow
gun, etc. is used to blow out dust
and clogs, the dust or clogs may
be pushed into the air intake
vents, which may affect the per-
formance of the hybrid battery
(traction battery) and cause a
malfunction.
■To prevent damage to the
vehicle
●Do not allow water or foreign
matter to enter t he air intake
vents when the covers are
removed.
●Carefully handle the removed
filter so that it will not be dam-
aged. If the filter is damaged,
have it replaced with a new filter
by your Toyota dealer.
●Make sure to reinstall the filters
and covers to their original posi-
tions after cleaning.
●Do not install anything to the air
intake vents other than the
exclusive filters for this vehicle
or use the vehicle without the fil-
ters installed.
■If “Maintenance Required for
Traction Battery Cooling
Parts See Owner’s Manual” is
shown on the multi-informa-
tion display
If the vehicle is continuously
driven with the warning message
(indicating that charging/discharg-
ing of the hybrid battery [traction
battery] may become limited) dis-
played, the hybrid battery (traction
battery) may malfunction. If the
warning message is displayed,
clean the air intake vents immedi-
ately.

4637-2. Steps to take in an emergency
7
When trouble arises
The following may indicate a
problem with your transmission.
Contact your Toyota dealer or
commercial towing service
before towing. 
The hybrid system warning
message is shown on the
multi-information display and
the vehicle does not move.
 The vehicle makes an abnor-
mal sound.
From the front (2WD models)
Release the parking brake.
Turn automatic mode off.
( P.244)
From the front (AWD models)
Use a towing dolly under the
rear wheels.
NOTICE
■To prevent damage to the
vehicle when towing using a
wheel-lift type truck
●Do not tow the vehicle from the
rear when the power switch is
off. The steering lock mecha-
nism is not strong enough to
hold the front wheels straight.
●When raising the vehicle,
ensure adequate ground clear-
ance for towing at the opposite
end of the raised vehicle. With-
out adequate clearance, the
vehicle could be damaged while
being towed.
■To prevent damage to the
vehicle when towing with a
sling-type truck
Do not tow with a sling-type truck,
either from the front or rear.
■Recreational towing (behind
motor home, etc.)
Never dinghy tow your vehicle to
prevent causing serious damage
to the AWD system and transmis-
sion. ( P.230)
Situations when it is nec-
essary to contact dealers
before towing
Towing with a wheel-lift
type truck

4667-2. Steps to take in an emergency
■Brake system warning light (warning buzzer)
■Brake system warning light
■Charging system warning light*
*: This light illuminates on the mu lti-information display with a message.
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 malfunc-
tion in the system. However, if this continues to occur, have
the vehicle inspected by your Toyota dealer.
Actions to the warning lights or warning buzzers
Warning lightDetails/Actions
(U.S.A.)
(Red)
(Canada)
Indicates that:
 The brake fluid level is low; or
 The brake system is malfunctioning
 Immediately stop the vehicle in a safe place and
contact your Toyota dealer. Continuing to drive
the vehicle may be dangerous.
Warning lightDetails/Actions
(Yellow)
Indicates a malfunction in:
The parking brake system;
 The regenerative braking system; or
 The electronically controlled brake system
 Have the vehicle insp ected by your Toyota
dealer immediately.
Warning lightDetails/Actions
Indicates a malfunction in the vehicle’s charging sys-
tem
 Immediately stop the vehicle in a safe place and
contact your Toyota dealer.

4677-2. Steps to take in an emergency
7
When trouble arises
■High coolant temperature warning light* (warning buzzer)
*: This light illuminates on the mu lti-information display with a message.
■Hybrid system overheat warning light* (warning buzzer)
*: This light illuminates on the mu lti-information display with a message.
■Low engine oil pressure warning light* (warning buzzer)
*: This light illuminates on the mu lti-information display with a message.
■Malfunction indicator lamp
Warning lightDetails/Actions
Indicates that the engine coolant temperature is too
high
 Immediately stop the v ehicle in a safe place.
Handling method ( P.511)
Warning lightDetails/Actions
Indicates that the hybri d system has overheated
 Stop the vehicle in a safe place.
Handling method ( P.511)
Warning lightDetails/Actions
Indicates that the engine oil pressure is too low
 Immediately stop the vehicle in a safe place and
contact your Toyota dealer.
Warning lightDetails/Actions
(U.S.A.)
(Canada)
Indicates a malfunction in:
 The hybrid system;
 The electronic engi ne control system;
 The electronic throttle control system; or
 The emission control system (if equipped)
 Have the vehicle insp ected by your Toyota
dealer immediately.

4697-2. Steps to take in an emergency
7
When trouble arises
■PCS warning light (warning buzzer)
■LTA indicator (warning buzzer)
■Intuitive parking assist OFF indicator (warning buzzer)
Warning lightDetails/Actions
(Flashes or illumi-
nates)
When a buzzer sounds simultaneously:
Indicates a malfunction has occurred in the PCS (Pre-
Collision System).
 Have the vehicle insp ected by your Toyota
dealer immediately.
When a buzzer does not sound:
The PCS (Pre-Collision System) has become tempo-
rarily unavailable, correctiv e action may be necessary.
 Follow the instructions d isplayed on the multi-
information display. ( P.265, 480)
If the PCS (Pre-Collision S ystem) or VSC (Vehicle Sta-
bility Control) syst em is disabled, the PCS warning
light will illuminate.
 P.274
Warning lightDetails/Actions
(Orange)
Indicates a malfunction in the LTA (Lane Tracing
Assist)
Follow the instructions d isplayed on the multi-
information display. ( P.285)
Warning lightDetails/Actions
(If equipped)
When a buzzer sounds:
Indicates a malfunction in t he Intuitive parking assist
function
 Have the vehicle insp ected by your Toyota
dealer immediately.
When a buzzer does not sound:
Indicates that the system i s temporarily unavailable,
possibly due to a sensor bei ng dirty or covered with
ice, etc.
 Follow the instructions d isplayed on the multi-
information display. ( P.311, 477)

4707-2. Steps to take in an emergency
■RCD OFF indicator (warning buzzer)
■PKSB OFF indicator (warning buzzer)
■RCTA OFF indicator (warning buzzer)
Warning lightDetails/Actions
(If equipped)
When a buzzer sounds:
Indicates a malfunction in the RCD (Rear Camera
Detection) function
 Have the vehicle insp ected by your Toyota
dealer immediately.
When a buzzer does not sound:
Indicates that the function temporarily cannot be used
due to the camera being dirty, etc.
 Follow the instructions d isplayed on the multi-
information display. ( P.477)
Warning lightDetails/Actions
(If equipped)
When a buzzer sounds:
Indicates a malfun ction in the PKSB ( Parking Support
Brake) system
 Have the vehicle insp ected by your Toyota
dealer immediately.
When a buzzer does not sound:
Indicates that the system i s temporarily unavailable,
possibly due to a sensor bei ng dirty or covered with
ice, etc.
 Follow the instructions d isplayed on the multi-
information display. ( P.322)
Warning lightDetails/Actions
(If equipped)
When a buzzer sounds:
Indicates a malfunction in t he RCTA (Rear Cross Traf-
fic Alert) function
 Have the vehicle insp ected by your Toyota
dealer immediately.
When a buzzer does not sound:
Indicates that the rear bumper around the radar sen-
sor is covered with dirt, etc. (P.301)
 Follow the instructions d isplayed on the multi-
information display. ( P.301, 477)

4717-2. Steps to take in an emergency
7
When trouble arises
■Slip indicator
■Brake Override System/Drive-Start Control/PKSB (if
equipped) warning light* (warning buzzer)
*: This light illuminates on the mu lti-information display with a message.
■Brake hold operated indicator (warning buzzer)
Warning lightDetails/Actions
Indicates a malfunction in:
The VSC/Trailer Sway Control system;
 The TRAC system; or
 The hill-start assist control system
 Have the vehicle insp ected by your Toyota
dealer immediately.
Warning lightDetails/Actions
When a buzzer sounds:
 Brake Override System is malfunctioning;
 Drive-Start Control is operating;
 Drive-Start Control i s malfunctioning; or
 Parking Support Brake function (for static objects) (if
equipped) is operating
 Follow the instructions d isplayed on the multi-
information display.
When a buzzer does not sound:
Brake Override Syst em is operating
 Release the accelerator pedal and depress the
brake pedal.
Warning lightDetails/Actions
(Flashes)
Indicates a malfunction in the brake hold system
 Have the vehicle insp ected by your Toyota
dealer immediately.

4777-2. Steps to take in an emergency
7
When trouble arises
The warning lights and warning buzzers operate as follows depend-
ing on the content of the message. If a message indicates the need
for inspection by a dealer, have the vehicle inspected by your Toyota
dealer immediately.
If a warning message
is displayed
The multi-information dis-
play shows warnings of sys-
tem malfunctions,
incorrectly performed oper-
ations, and messages that
indicate a need for mainte-
nance. When a message is
shown, perform the correc-
tion procedure appropriate
to the message.
Multi-information display
Follow the instru ctions of the
message on the multi-information
display.
If any of the warning messages
are shown again after the follow-
ing actions have been performed,
contact your To yota dealer.
A
Messages and warnings