2023 TOYOTA SEQUOIA HYBRID check engine

4686-3. Do-it-yourself maintenance
Owners Manual_USA_M0C043_en
The coolant level is satisfactory
if it is between the “F” and “L”
lines on the reservoir when the
hybrid system is cold.
Engine coolant Engine coolant reservoir cap
“F” line
“L” line
If the level is on or below the “L”
line, add coolant up
to the “F” line.
(  P.543)
Intercooler coolant
Intercooler coolant reservoir
cap
“F” line
“L” line
If the level is on or below the “L”
line, add coolant up to the “F” line.
(  P.543)
Power control unit coolant
Power control unit coolant
reservoir cap
“FULL” line
NOTICE
■To prevent serious engine
damage
Check the oil level on a regular
basis.
■When replacing the engine oil
●Be careful not to spill engine oil
on the vehicle components.
●Avoid overfilling, or the engine
could be damaged.
●Check the oil le vel on the dip-
stick every time you refill the
vehicle.
●Be sure the engine oil filler cap
is properly tightened.
■If oil is spilled on the engine
cover
To prevent the engine cover from
being damaged, remove any
engine oil from the engine cover
as soon as possible using a neu-
tral detergent. Do not use an
organic solvent such as brake
cleaner.
Checking the coolant

4696-3. Do-it-yourself maintenance
Owners Manual_USA_M0C043_en
6
Maintenance and care
“LOW” line
If the level is on or below the “LOW”
line, add coolant up to the “FULL”
line. ( P.543)
■Coolant selection
Only use “Toyota Super Long Life
Coolant” or a similar high quality
ethylene glycol based non-silicate,
non-amine, non-nitrite, and non-
borate coolant with long-life hybrid
organic acid technology.
U.S.A.:“Toyota Super Long Life
Coolant” is a mixture of 50% coolant
and 50% deionized water.
(Minimum temperature: -31°F [-
35°C])
Canada: “Toyota Super Long Life
Coolant” is a mixture of 55% coolant
and 45% deionized water.
(Minimum temperature: -44°F [-
42°C])
For more details about coolant, con-
tact your Toyota dealer.
■If the coolant level drops within
a short time of replenishing
Visually check the radiator, hoses,
engine coolant reser voir cap, inter-
coolant reservoir cap, drain cock
and water pump.
If you cannot find a leak, have your
Toyota dealer test the cap and
check for leaks in the cooling sys-
tem.
Check the radiator, condenser
and intercooler radiators and
clear away any foreign objects.
If either of the above parts is
extremely dirty or you are not
sure of their condition, have
your vehicle inspected by your
Toyota dealer.
■Checking fluid level
The brake fluid level should be
between the “MAX” and “MIN”
WARNING
■When the hybrid system is
hot
Do not remove the coolant reser-
voir cap.
The cooling system may be under
pressure and may spray hot cool-
ant if the cap is removed, causing
serious injuries, such as burns.
NOTICE
■When adding coolant
Coolant is neither plain water nor
straight antifreeze. The correct
mixture of water and antifreeze
must be used to provide proper
lubrication, corrosion protection
and cooling. Be sure to read the
antifreeze or coolant label.
■If you spill coolant
Be sure to wash it off with water to
prevent it from damaging parts or
paint.
Checking the radiator,
condenser and inter-
cooler radiators
WARNING
■When the hybrid system is
hot
Do not touch the radiator, con-
denser or intercooler radiators or
condenser as they may be hot
and cause serious injuries, such
as burns.
Checking and adding the
brake fluid

4956-3. Do-it-yourself maintenance
Owners Manual_USA_M0C043_en
6
Maintenance and care
1 Turn the power switch off.
2 Open the fuse box cover.
Engine compartment: type A
fuse box
Push the tabs in and lift the lid off.
Engine compartment: type B
fuse box
Push the tabs in and lift the lid off.
Passenger’ side instrument
panel
Remove the cover.
Vehicles with footwell lights:
Remove the footwell lights connec-
tor.
Remove the lid.
Make sure to push the claw when
removing/installing the lid.
Checking and replac-
ing fuses
If any of the electrical com-
ponents do not operate, a
fuse may have blown. If this
happens, check and replace
the fuses as necessary.
Checking and replacing
fuses

5207-2. Steps to take in an emergency
Owners Manual_USA_M0C043_entems such as PCS (Pre-Collision
system) or the dynamic radar cruise
control with full-speed range is oper-
ating. If a warning message is
shown, be sure to decelerate the
vehicle or follow an instruction
shown on the multi
-information dis-
play.
A warning message is shown when
Brake Override System operates.
(  P.188)
A warning message is shown when
Drive-Start Control ( P.193) or
Parking Support Brake (if equipped)
(  P.307) operates. Follow the
instructions on the multi-information
display.
●If a message about an operation
of the power switch is displayed
An instruction for operation of the
power switch is shown when the
incorrect procedure for starting the
hybrid system is performed or the
power switch is operated incorrectly.
Follow the instructions shown on the
multi-information display to operate
the power switch again.
●If a message abou t a shift lever
operation is displayed
To prevent the shift lever from being
operated incorrectly or the vehicle
from moving unexpectedly, a mes-
sage that requires shifting the shift
lever may be sho wn on the multi-
information display . In that case, fol-
low the instruction of the message
and shift the shift lever.
●If a message or image about an
open/close state of a part or
replenishment of a consumable is
displayed
Confirm the part indicated by the
multi-information display or a warn-
ing light, and then perform the cop- ing method such as closing the
open door or replenishing a con-
sumable.
■If a message that indicates the
need for visiting your Toyota
dealer is displayed
The system or part shown on the
multi-information di splay is malfunc-
tioning. Have the vehicle inspected
by your Toyota dealer immediately.
■If a message that indicates the
need for referring to Owner’s
Manual is displayed
●If “Engine Coolant Temp High
Stop in a Safe Place See Owner’s
Manual” is shown, follow the
instructions ( P.543).
●If the following messages are
shown, there may be a malfunc-
tion.
Immediately stop the vehicle in a
safe place and contact your Toy-
ota dealer. Continuing to drive the
vehicle may be dangerous.
• “Hybrid System Malfunction”
• “Check Engine”
• “Traction battery system malfunc- tion”
• “Accelerator System Malfunction”
• “Hybrid System Stopped”
• “Smart Key System Malfunction See Owner’s Manual”
●If the following messages are
shown, there may be a malfunc-
tion.
Immediately have the vehicle
inspected by your Toyota dealer.
• “Oil Pressure Low Stop in a Safe Place See Owner’s Manual”
• “Braking Power Low Stop in a
Safe Place See Owner’s Manual”
●If “Maintenance Required for Trac-
tion Battery Cooling Parts See
Owner’s Manual” is shown, the fil-
ter may be clogged, the air intake
vent may be blocked, or there may
be a gap in the duct. Therefore,
perform the follo wing correction
procedure.
• If the air intake vent or filter of the

5217-2. Steps to take in an emergency
Owners Manual_USA_M0C043_en
7
When trouble arises
hybrid battery (traction battery)
are dirty, perform the procedures
on P.489 to clean them.
• If the warning message is shown when the air intake vent and filter
of the hybrid battery (traction bat-
tery) are not dirty, have the vehicle
inspected at you r Toyota dealer.
■If “Shift to P Before Exiting
Vehicle” or “Shift to P when
Parked” is displayed
Message is displayed when the
driver’s door is opened without turn-
ing the power switch to OFF with the
shift lever in any position other than
P.
Shift the shift lever to P.
■If “Shift is in N Release Acceler-
ator Before Shif ting” is shown
Message is displayed when the
accelerator pedal has been
depressed and the shift lever is in N.
Release the accelerator pedal and
shift the shift lever to D, S or R.
■If “Auto Power OFF to Conserve
Battery” is displayed
Power was turned off due to the
automatic power off function.
Next time when starting the hybrid
system, increase the hybrid system
speed slightly and maintain that
level for approximately 5 minutes to
recharge the 12-volt battery.
■If “Headlight System Malfunc-
tion Visit Your Dealer” is dis-
played
The following systems may be mal-
functioning. Have the vehicle
inspected by your Toyota dealer
immediately.
●The LED headlight system
●The automatic headlight leveling
system (if equipped)
●Automatic High Beam
■If “Engine Oil Level Low Add or
Replace” is displayed
The engine oil le vel may be low.
Check the level o f the engine oil,
and add engine oil if necessary. This
message may be displayed if the
vehicle is stopped on a slope. Move
the vehicle to a l evel surface and
check if the message disappears.
■If “Hybrid System Stopped
Steering Power Low” is dis-
played
This message is displayed if the
hybrid system is stopped while driv-
ing.
When steering wheel operations are
heavier than usual, grip the steering
wheel firmly and operate it using
more force than usual.
■If “Maintenance Required
Soon” is displayed
Indicates that all maintenance
according to the driven distance on
the maintenance schedule
* should
be performed soon.
Comes on approximately 4500
miles (7200 km) after the message
has been reset.
If necessary, perform maintenance.
Please reset the m essage after the
maintenance is performed.
(  P.457)
*: Refer to the separate “Scheduled
Maintenance Guide” or “Owner’s
Manual Supplement” for the main-
tenance interval applicable to your
vehicle.
■If “Maintenance Required Visit
Your Dealer” is displayed
Indicates that all maintenance is
required to correspond to the driven
distance on the maintenance sched-
ule
*.
Comes on approximately 5000
miles (8000 km) after the message
has been reset. (The indicator will
not work properly unless the mes-

5227-2. Steps to take in an emergency
Owners Manual_USA_M0C043_ensage has been reset.)
Perform the necessary mainte-
nance. Please reset the message
after the maintenance is performed.
(
 P.457)
*: Refer to the separate “Scheduled
Maintenance Guide” or “Owner’s
Manual Supplement” for the main-
tenance interval applicable to your
vehicle.
■If “Oil Maintenance Required
Soon” is displayed
Indicates that the engine oil should
be scheduled to be changed.
Check the engine oil and change it if
necessary. After changing the
engine oil, make sure to reset the
message. ( P.467)
■If “Oil Maintenance Required” is
displayed
Indicates that the engine oil should
be changed.
Check and change t he engine oil,
and oil filter by your Toyota dealer.
After changing the engine oil, make
sure to reset the message.
(  P.467)
■If a message that indicates the
malfunction of front camera is
displayed
The following sys tems may be sus-
pended until the pr oblem shown in
the message is resolved. ( P.247,
509)
●PCS (Pre-Collis ion System)
●LTA (Lane Tracing Assist)
●Automatic High Beam
●RSA (Road Sign Assist) (if
equipped)
●Dynamic radar cruise control with
full-speed range
■If a message that indicates the
malfunction of radar sensor is
displayed
The following systems may be sus-
pended until the problem shown in
the message is resolved. (P.247,
509)
●PCS (Pre-Collision System)
●LTA (Lane Tracing Assist)
●Dynamic radar cruise control with
full-speed range
■If “Radar Cruise Control
Unavailable See Owner’s Man-
ual” is displayed
The dynamic radar cruise control
with full-speed range system is sus-
pended temporarily or until the prob-
lem shown in the message is
resolved. (causes and coping meth-
ods: P.247)
■If “Radar Cruise Control
Unavailable” is displayed
The dynamic radar cruise control
with full-speed range system cannot
be used temporarily. Use the system
when it becomes available again.
■Warning buzzer
 P.519

5457-2. Steps to take in an emergency
Owners Manual_USA_M0C043_en
7
When trouble arises
6 Start the hybrid system to
check that the radiator cool-
ing fan operates and to check
for coolant leaks from the
radiator or hoses.
7 If the fan is not operating:
Stop the hybrid system
immediately and contact your
Toyota dealer.
If the fan is operating:
Have the vehicle inspected at
the nearest Toyota dealer.
8 Check if “Engine Coolant
Temp High Stop in a Safe
Place See Owner’s Manual”
is shown on the multi-infor-
mation display.
If the message does not disappear:
Stop the hybrid system and contact
your Toyota dealer.
If the message is not displayed:
Have the vehicle i nspected at the
nearest Toyota dealer.
WARNING
■When inspecting under the
hood of your vehicle
Observe the following precau-
tions.
Failure to do so may result in seri-
ous injury such as burns.
●If steam is seen coming from
under the hood, do not open the
hood until the steam has sub-
sided. The engine compart-
ment may be very hot.
●After the hybrid system has
been turned off , check that the
“READY” indicator is off. When
the hybrid system is operating,
the gasoline engine may auto-
matically start, or the cooling fan
may suddenly operate even if
the gasoline engine stops. Do
not touch or approach rotating
parts such as the fan, which
may lead to fingers or clothing
(especially a tie, a scarf or a
muffler) getting caught, resulting
in serious injury.
●Do not loosen the coolant reser-
voir caps, while the hybrid sys-
tem and radiator are hot.
High temperature steam or
coolant could spray out.
NOTICE
■When adding coolant
Add coolant slowly after the
hybrid system has cooled down
sufficiently. Adding cool coolant to
a hot hybrid system too quickly
can cause damage to the hybrid
system.
■To prevent damage to the
cooling system
Observe the following precau-
tions:
●Avoid contaminating the coolant
with foreign matter (such as
sand or dust, etc.).
●Do not use any coolant additive.

5518-1. Specifications
Owners Manual_USA_M0C043_en
8
Vehicle specifications
■Oil capacity (Drain and refill
[Reference
*])
*: The engine oil capacity is a refer- ence quantity to be used when
changing the engine oil. Warm up
and turn off the engine, wait more
than 8 minutes, and check the oil
level on the dipstick.
■Engine oil selection
“Toyota Genuine Motor Oil” is
used in your Toyota vehicle. Use
Toyota approved “Toyota Genu-
ine Motor Oil” or equivalent to
satisfy the following grade and
viscosity.
Oil grade: ILSAC GF-6A multigrade engine
oil
Recommended viscosity: SAE
0W-20
Outside temperature
SAE 0W-20 is the best choice
for good fuel economy and good
starting in cold weather.
If SAE 0W-20 is not available,
SAE 5W-20 oil may be used.
However, it must be replaced
with SAE 0W-20 at the next oil
change.
Electric motor (traction motor)
Ty p ePermanent magnet synchronous motor
Maximum output36 kW
Maximum torque184 ft·lbf (250 N ·m, 25.5 kgf·m)
Hybrid battery (traction battery)
Ty p eNickel-Metal hydride battery
Voltage7.2 V/module
Capacity6.5 Ah
Quantity40 modules
Nominal voltage288 V
Lubrication system
With filter7.7 qt. (7.3 L, 6.4 Imp.
qt.)
Without
filter7.4 qt. (7.0 L, 6.2 Imp.
qt.)