2021 TOYOTA AVALON HYBRID battery

4887-2. Steps to take in an emergency
Connect the jumper cables according to the following procedure:
Connect a positive jumper cable clamp to the exclusive jump
starting terminal on your vehicle.
Connect the clamp on the other end of the positive cable to the
positive (+) battery terminal on the second vehicle.
Connect a negative cable clamp to the negative (-) battery termi-
nal on the second vehicle.
Connect the clamp at the other end of the negative cable to a
solid, stationary, unpainted metallic point away from the exclusive
jump starting terminal and any moving parts, as shown in the
illustration.4
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4897-2. Steps to take in an emergency
7
When trouble arises
Start the engine of the second vehicle. Increase the engine speed
slightly and maintain at that level for approximately 5 minutes to
recharge the 12-volt battery of your vehicle.
Open and close any of the doors of your vehicle with the power
switch off.
Maintain the engine speed of the second vehicle and turn the power
switch to ON mode, then start the vehicle's engine.
Make sure the “READY” indicator comes on. If the indicator does
not come on, contact your Toyota dealer.
Once the hybrid system has started, remove the jumper cables in
the exact reverse order from which they were connected.
Close the exclusive jump starting terminal cover, and reinstall the
fuse box cover to its original position.
Once the hybrid system starts, have the vehicle inspected at your
Toyota dealer as soon as possible.5
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4907-2. Steps to take in an emergency
■Starting the hybrid system when the 12-volt battery is discharged
The hybrid system cannot be started by push-starting.
■To prevent 12-volt battery discharge
●Turn off the headlights and the audio system while the hybrid system is off.
●Turn off any unnecessary electrical components when the vehicle is running
at a low speed for an extended period, such as in heavy traffic.
■When the 12-volt battery is removed or discharged
●Information stored in the ECU is cleared. When the 12-volt battery is
depleted, have the vehicle inspected at your Toyota dealer.
●Some systems may require initialization. (P. 535)
■When removing the 12-volt battery terminals
When the 12-volt battery terminals are removed, the information stored in the
ECU is cleared. Before removing the 12-volt battery terminals, contact your
Toyota dealer.
■Charging the 12-volt battery
The electricity stored in the 12-volt battery will discharge gradually even when
the vehicle is not in use, due to natural discharge and the draining effects of
certain electrical appliances. If the vehicle is left for a long time, the 12-volt
battery may discharge, and the hybrid system may be unable to start. (The
12-volt battery recharges automatically while the hybrid system is operating.)
■When recharging or replacing the 12-volt battery
●In some cases, it may not be possible to unlock the doors using the smart
key system when the 12-volt battery is discharged. Use the wireless remote
control or the mechanical key to lock or unlock the doors.
●The hybrid system may not start on the first attempt after the 12-volt battery
has recharged but will start normally after the second attempt. This is not a
malfunction.
●The power switch mode is memorized by the vehicle. When the 12-volt bat-
tery is reconnected, the system will return to the mode it was in before the
12-volt battery was discharged. Before disconnecting the 12-volt battery,
turn the power switch off.
If you are unsure what mode the power switch was in before the 12-volt bat-
tery discharged, be especially careful when reconnecting the 12-volt battery.

4917-2. Steps to take in an emergency
7
When trouble arises
■When replacing the 12-volt battery
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53004800440051000300350048004a0058004f00440057004c[ons).
●Use a 12-volt battery that the case size is same as the previous one (LN2),
20 hour rate capacity (20HR) is equivalent (64Ah) or greater, and perfor-
mance rating (CCA) is equivalent (356A) or greater.
• If the sizes differ, the 12-volt battery cannot be properly secured.
• If the 20 hour rate capacity is low, even if the time period where the vehi-
cle is not used is a short time, the 12-volt battery may discharge and the
hybrid system may not be able to start.
●Use a 12-volt battery with a handle. If a 12-volt battery without a handle is
used, removal is more difficult.
For details, consult your Toyota dealer. ●After replacing, firmly attach the follow-
ing items to the exhaust hole of the 12-
volt battery.
• Use the exhaust hose that was
attached to the 12-volt battery before
replacing and confirm that it is firmly
connected to the hole section of the
vehicle.
• Use the exhaust hole plug included
with the 12-volt battery replaced or
the one installed on the battery prior
to the replacement. (Depending on
the 12-volt battery to be replaced, the
exhaust hole may be plugged.)
Exhaust hole plug
Exhaust hole
Exhaust hose
Hole section of the vehicle
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4927-2. Steps to take in an emergency
WARNING
■When removing the 12-volt battery terminals
Always remove the negative (-) terminal first. If the positive (+) terminal con-
tacts any metal in the surrounding area when the positive (+) terminal is
removed, a spark may occur, leading to a fire in addition to electrical shocks
and death or serious injury.
■Avoiding 12-volt battery fires or explosions
Observe the following precautions to prevent accidentally igniting the flam-
mable gas that may be emitted from the 12-volt battery:
●Make sure each jumper cable is connected to the correct terminal and that
it is not unintentionally in contact with any other than the intended terminal.
●Do not allow the other end of the jumper cable connected to the “+” termi-
nal to come into contact with any other parts or metal surfaces in the area,
such as brackets or unpainted metal.
●Do not allow the + and - clamps of the jumper cables to come into contact
with each other.
●Do not smoke, use matches, cigarette lighters or allow open flame near
the 12-volt battery.
■12-volt battery precautions
The 12-volt battery contains poisonous and corrosive acidic electrolyte,
while related parts contain lead and lead compounds. Observe the following
precautions when handling the 12-volt battery:
●When working with the 12-volt battery, always wear safety glasses and
take care not to allow any battery fluids (acid) to come into contact with
skin, clothing or the vehicle body.
●Do not lean over the 12-volt battery.
●In the event that battery fluid comes into contact with the skin or eyes,
immediately wash the affected area with water and seek medical attention.
Place a wet sponge or cloth over the affected area until medical attention
can be received.
●Always wash your hands after handling the 12-volt battery support, termi-
nals, and other 12-volt battery-related parts.
●Do not allow children near the 12-volt battery.
■After recharging the 12-volt battery
Have the 12-volt battery inspected at your Toyota dealer as soon as possi-
ble.
If the 12-volt battery is deteriorating, continued use may cause the 12-volt
battery to emit a malodorous gas, which may be detrimental to the health of
passengers.

4937-2. Steps to take in an emergency
7
When trouble arises
WARNING
■When replacing the 12-volt battery
After replacing, securely attach the exhaust hose and exhaust hole plug to
the exhaust hole of the replaced 12-volt battery. If not properly installed,
gases (hydrogen) may leak into the vehicle interior, and there is the possi-
ble danger of the gas igniting and exploding.
NOTICE
■When handling jumper cables
When connecting the jumper cables, ensure that they do not become entan-
gled in the cooling fan or engine drive belt.
■To prevent damaging the vehicle
The exclusive jump starting terminal is to be used when charging the 12-volt
battery from another vehicle in an emergency. It cannot be used to jump
start another vehicle.

5048-1. Specifications
Engine
Model A25A-FXS
Type 4-cylinder in line, 4-cycle, gasoline
Bore and stroke 3.44  4.07 in. (87.5  103.4 mm)
Displacement 151.8 cu. in. (2487 cm3)
Valve clearance Automatic adjustment
Fuel
Fuel type Unleaded gasoline only
Octane rating 87 (Research Octane Number 91) or higher
Fuel tank capacity
(Reference)13 gal. (49.3 L, 10.8 Imp. gal.)
Electric motor (Traction motor)
Type Permanent magnet synchronous motor
Maximum output 88 kW
Maximum torque 149 ft•lbf (202 N•m, 20.6 kgf•m)
Hybrid battery (Traction battery)
Type Lithium-ion battery
Voltage 3.7 V/cell
Capacity 4.0 Ah
Quantity 70 cells
Nominal voltage 259 V

5078-1. Specifications
8
Vehicle specifications
*: The fluid capacity is a reference quantity.
If replacement is necessary, contact your Toyota dealer.
*: Minimum pedal clearance when depressed with a force of 67 lbf (300 N, 31
kgf) while the hybrid system is operating.
Electrical system
12-volt battery
Open voltage at
68F (20C):12.0 V or higher
If the voltage is lower than the standard value,
charge the battery.
(When checking the voltage, after turning the
power switch off, wait for 30 seconds with the
high beam headlights illuminated, then turn the
high beam headlights off and check the voltage.)
Charging rates5 A max.
Hybrid transmission
Fluid capacity*4.1 qt. (3.9 L, 3.4 Imp. qt.)
Fluid type Toyota Genuine ATF WS
NOTICE
■Hybrid transmission fluid type
Using transmission fluid other than the above type may cause abnormal
noise or vibration, or ultimately damage the transmission of your vehicle.
Brakes
Pedal clearance*3.3 in. (85 mm)
Pedal free play 0.04  0.24 in. (1  6 mm)
Brake pad wear limit0.04 in. (1.0 mm)
Fluid typeSAE J1703 or FMVSS No.116 DOT 3
SAE J1704 or FMVSS No.116 DOT 4
Steering
Free play Less than 1.2 in. (30 mm)