2021 TOYOTA SIENNA HYBRID check engine

35Maintenance Log
MAINTENANCE
MAINTAINING YOUR WARRANTY

IMPORTANT MAINTENANCE
INFORMATION
It is especially important to both
routinely check your vehicle’s engine
oil level (once a month) and regularly
replace the engine oil and oil filter
(see the Maintenance Log section of
this booklet to determine how often
you should change your vehicle’s oil
and filter). Failure to do so can cause
oil starvation and/or oil gelling, which
can result in severe damage to your
vehicle and require costly repairs that
are not covered by the New Vehicle
Limited Warranty.
Maintenance Records
Maintaining your vehicle according to
the recommendations in this booklet is
required to ensure that your warranty
coverage remains intact. You should keep
detailed records of vehicle maintenance,
including date of service, mileage at time
of service and a description of service
and/or parts installation performed. The
scheduled maintenance log in this booklet
can help you document this information. If
you sell your vehicle, be sure to give your
maintenance records to the new owner.
Toyota will not deny a warranty claim
solely because you do not have records
to show that you maintained your vehicle.
However, damage or failure caused by lack
of proper maintenance is not covered
under warranty.


Maintenance Providers
Maintenance and repair services may be
performed by you or by any automotive
service provider you choose. Toyota will
not deny a warranty claim solely because
you used a service provider other than a
Toyota dealership for maintenance and
repairs. However, damage or failure
caused by improper maintenance or
repairs is not covered under warranty.
Dealer-Recommended
Maintenance
Your dealer may recommend more
frequent maintenance intervals or more
maintenance services than those listed in
the scheduled maintenance log. These
additional services are not required to
maintain your warranty coverage. Ask
your dealer to explain any recommended
maintenance not included in the scheduled
maintenance log.
For a complete description of Toyota
warranty coverages, see the Warranty
Information portion of this booklet.
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37Maintenance Log
USING THE MAINTENANCE LOG CHARTS
MAINTENANCE
Special Operating Conditions
In addition to standard maintenance items,
the maintenance log indicates services that
should be performed on vehicles that are
driven under especially demanding
conditions. These “special operating
conditions” and their required maintenance
items are clearly indicated in each chart.
NOTE:
You should perform these additional
maintenance services only if the
majority of your driving is done under
the special operating conditions
indicated. If you only occasionally
drive under these circumstances, it
is not necessary to perform the
additional services.
Engine Oil Selection
Please refer to your Owner’s Manual for the
specific oil viscosity rating recommended
for your vehicle/engine type.
Additional Maintenance
In addition to scheduled maintenance,
your Toyota requires ongoing general
maintenance, such as fluid checks and
visual inspections. These procedures are
explained in the “Maintenance and Care”
section of the Owner’s Manual. Be sure
to perform these procedures regularly to
ensure the most trouble-free operation
of your vehicle.
SuperChrome and
Alloy Wheel Care
If you purchased Genuine Toyota Accessory
SuperChrome or Aluminum Alloy Wheels,
follow these cleaning guidelines to maintain
the appearance of your wheels:
• If wheels are hot, wait for them to cool
before washing.
• Use a soft sponge or cotton cloth to
apply the same mild car-wash soap as
used for the vehicle body. Quickly rinse
off with water. Use a soft cloth to apply
the same car wax as used for the
vehicle body.
• DO NOT USE: Any kind of chemical-
based cleaners, alcohol, solvents,
gasoline, steam cleaners, scouring
pads, wire brushes or coarse abrasives
to clean your wheels.
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41Maintenance Log
MAINTENANCE LOG
MAINTENANCE
30,000 miles or 36 months
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Inspect the following: _ Automatic transmission for signs of leakage _Ball joints and dust covers _Brake lines and hoses _ Brake linings/drums and brake pads/discs5
_Drive shaft boots _Engine/Inverter coolant6
Additional Maintenance Items for Special Operating Conditions3
Driving on dirt roads or dusty roads: ■Tighten nuts and bolts on chassis and body
Driving while towing, using a car-top carrier, or heavy vehicle loading:7
■Tighten nuts and bolts on chassis and body
_Exhaust pipes and mountings _ Fuel lines and connections, fuel tank band and fuel tank vapor vent system hoses _Fuel tank cap gasket _Radiator, condenser and/or intercooler _Rear differential oil (AWD) _Steering gear _Steering linkage and boots
1 Inspect sealed transmissions, transfer cases and differentials for signs of leakage. If any leakage from a sealed component is suspected, it is recommended that you have the sealed component inspected by a Toyota dealer. Inspect power steering fluid (if equipped) and brake fluid level/condition. Inspect engine and inverter (if equipped) coolant level/condition/freezing point. Your dealer may recommend services (Dealer-Recommended Maintenance) based on inspection results.2 Reset the oil replacement reminder light (“MAINT REQD”) or the message “OIL MAINTENANCE REQUIRED” on the multi-information display after maintenance at every 5,000 miles.3 Perform these service items only if you drive primarily under the conditions indicated. 4 Visually check the HV battery cooling intake filter for dirt or dust every 5,000 miles and clean if necessary. Clean every 20,000 miles.5 Inspect thickness measurement and disc runout.6 Refer to “Engine/Inverter Coolant” in the “Explanation of Maintenance Items” section in the back of this guide for more information.7 Not all vehicles are designed for towing. Refer to your Vehicle Owner’s Manual for details.
Dealer Service verification:
Date:Mileage:
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45Maintenance Log
MAINTENANCE LOG
MAINTENANCE
60,000 miles or 72 months
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Inspect the following: _ Automatic transmission for signs of leakage _Ball joints and dust covers _Brake lines and hoses _ Brake linings/drums and brake pads/discs5
_Drive shaft boots
_Engine/Inverter coolant6
Additional Maintenance Items for Special Operating Conditions3
Driving on dirt roads or dusty roads: ■Tighten nuts and bolts on chassis and body
Driving while towing, using a car-top carrier, or heavy vehicle loading:7
■Replace automatic transmission fluid
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Dealer Service verification:
Date:Mileage:
_exhaust pipes and mountings _ fuel lines and connections, fuel tank band and fuel tank vapor vent system hoses _fuel tank cap gasket _radiator, condenser and/or intercooler _rear differential oil (aWD) _Steering gear _Steering linkage and boots
1 inspect sealed transmissions, transfer cases and differentials for signs of leakage. if any leakage from a sealed component is suspected, it is recommended that you have the sealed component inspected by a toyota dealer. inspect power steering fluid (if equipped) and brake fluid level/condition. inspect engine and inverter (if equipped) coolant level/condition/freezing point. Your dealer may recommend services (Dealer-recommended Maintenance) based on inspection results.2 reset the oil replacement reminder light (“Maint reQD”) or the message “oil Maintenance reQUireD” on the multi-information display after maintenance at every 5,000 miles.3 Perform these service items only if you drive primarily under the conditions indicated.4 visually check the Hv battery cooling intake �lter for dirt or dust every 5,000 miles and clean if necessary. clean every 20,000 miles.5 inspect thickness measurement and disc runout.6 refer to “engine/inverter coolant” in the “explanation of Maintenance items” section in the back of this guide for more information. 7 not all vehicles are designed for towing. refer to your vehicle Owner’s Manual for details.
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49Maintenance Log
MAINTENANCE LOG
MAINTENANCE
90,000 miles or 108 months
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Inspect the following: _ Automatic transmission for signs of leakage _Ball joints and dust covers _Brake lines and hoses _ Brake linings/drums and brake pads/discs5
_Drive shaft boots _Engine/Inverter coolant6
Additional Maintenance Items for Special Operating Conditions3
Driving on dirt roads or dusty roads: ■Tighten nuts and bolts on chassis and body
Driving while towing, using a car-top carrier, or heavy vehicle loading:7
■Tighten nuts and bolts on chassis and body
Dealer Service verification:
Date:Mileage:
_exhaust pipes and mountings _ fuel lines and connections, fuel tank band and fuel tank vapor vent system hoses _fuel tank cap gasket _radiator, condenser and/or intercooler _rear differential oil (aWD) _Steering gear _Steering linkage and boots
1 inspect sealed transmissions, transfer cases and differentials for signs of leakage. if any leakage from a sealed component is suspected, it is recommended that you have the sealed component inspected by a toyota dealer. inspect power steering fluid (if equipped) and brake fluid level/condition. inspect engine and inverter (if equipped) coolant level/condition/freezing point. Your dealer may recommend services (Dealer-recommended Maintenance) based on inspection results.2 reset the oil replacement reminder light (“Maint reQD”) or the message “oil Maintenance reQUireD” on the multi-information display after maintenance at every 5,000 miles.3 Perform these service items only if you drive primarily under the conditions indicated.4 visually check the Hv battery cooling intake �lter for dirt or dust every 5,000 miles and clean if necessary. clean every 20,000 miles.5 inspect thickness measurement and disc runout.6 refer to “engine/inverter coolant” in the “explanation of Maintenance items” section in the back of this guide for more information.7 not all vehicles are designed for towing. refer to your vehicle Owner’s Manual for details.
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55Maintenance Log
MAINTENANCE
Driver’s Floor Mat
• Only use the driver’s floor mat
designed specifically for the model
and model year of your vehicle.
• Always properly secure the driver’s
floor mat using the retaining hooks.
• Never install another floor mat on top
of the existing driver’s floor mat.
• Never install the driver’s floor mat
upside down.
Engine Air Filter
Inspect or replace at specified intervals.
When performing inspections, check for
damage, excessive wear and oiliness,
and replace if necessary.
Engine/Inverter Coolant
Drain the cooling system and refill with an
ethylene-glycol type coolant. Inspect hoses
and connections for corrosion and leaks.
Tighten connections and replace parts
when necessary. A qualified technician
should perform these operations.
(For further details, refer to “Radiator,
Condenser and Hoses” in the “Maintenance
and Care” section of the Owner’s Manual).
Your Toyota is equipped with Genuine
Toyota Super Long-Life Coolant. The
replacement intervals for engine coolant
recommended in this booklet are based
on replacement with Genuine Toyota
Super Long-Life Coolant or similar
high-quality non-silicate, non-amine,
non-borate ethylene-glycol coolant with
long-life hybrid organic acid technology
(i.e., a combination of low phosphates
and organic acids). If another type
of ethylene-glycol coolant is used,
replacement intervals may be different.
EXPLANATION OF MAINTENANCE ITEMS
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