ECU TOYOTA COROLLA CROSS HYBRID 2023 Service Manual

731-4. Hybrid system
1
For safety and security
WARNING
●If your vehicle needs to be
towed, do so with the four
wheels raised. If the wheels
connected to the electric motor
(traction motor) are on the
ground when towing, the motor
may continue to generate elec-
tricity. This may cause a fire.
(
P.397)
●Carefully inspect the ground
under the vehicle. If you find
that liquid has leaked onto the
ground, the fuel system may
have been damaged. Leave the
vehicle as soon as possible.
●Do not touch the battery if liquid
is leaking from or adhering to it.
If electrolyte (carbonic-based
organic electrolyte) from the
hybrid battery (traction battery)
comes into contact with the
eyes or skin, it could cause
blindness or skin wounds. In the
unlikely event that it comes into
contact with the eyes or skin,
wash it off immediately with a
large amount of water, and seek
immediate medical attention.
●If electrolyte is leaking from the
hybrid battery (traction battery),
do not approach the vehicle.
Even in the unlikely event that
the hybrid battery (traction bat-
tery) is damaged, the internal
construction of the battery will
prevent a large amount of elec-
trolyte from leaking out. How-
ever, any electrolyte that does
leak out will give off a vapor.
This vapor is an irritant to skin
and eyes and could cause acute
poisoning if inhaled.
●Do not bring burning or
high-temperature items close to
the electrolyte.
The electrolyte may ignite and
cause a fire.
■Hybrid battery (traction bat-
tery)
●Your vehicle contains a sealed
lithium-ion battery.
●Never resell, hand over or mod-
ify the hybrid battery. To prevent
accidents, hybrid batteries that
have been removed from a dis-
posed vehicle are collected
through Toyota dealer. Do not
dispose of the battery yourself.
Unless the battery is properly col-
lected, the following may occur,
resulting in dea th or serious
injury:
• The hybrid batte ry may be ille-
gally disposed of or dumped,
and it is hazardous to the envi-
ronment or someone may touch
a high voltage part, resulting in
an electric shock.
• The hybrid battery is intended to be used exclusively with your
hybrid vehicle. If the hybrid bat-
tery is used out side of your
vehicle or modified in any way,
accidents such as electric
shock, heat generation, smoke
generation, an explosion and
electrolyte leakage may occur.
When reselling or handing over
your vehicle, the possibility of an
accident is extremely high
because the person receiving the
vehicle may not be aware of these
dangers.

751-4. Hybrid system
1
For safety and security
your vehicle will not restart. To
restart the hybrid system, con-
tact your Toyota dealer.
A message is automatically dis-
played when a malfunction
occurs in the hybrid system or
an improper operation is
attempted.
If a warning message is shown
on the multi-information display,
read the message and follow the
instructions.
■If a warning light comes on, a
warning message is displayed,
or the 12-volt battery is discon-
nected
The hybrid system may not start. In
this case, try to start the system
again. If the “READY” indicator does
not come on, contact your Toyota
dealer.
Hybrid warning message

761-5. Theft deterrent system
1-5.Theft deterrent system
The indicator light flashes after
the power switch has been
turned off to indicate that the
system is operating.
The indicator light stops flashing
after the power switch has been
turned to ACC or ON to indicate
that the system has been can-
celed.
■System maintenance
The vehicle has a mainte-
nance-free type immobilizer system.
■Conditions that may cause the
system to malfunction
●If the grip portion of the key is in
contact with a metallic object
●If the key is in close proximity to or
touching a key to the security sys-
tem (key with a built-in transpon-
der chip) of another vehicle
Immobilizer system
The vehicle’s keys have
built-in transponder chips
that prevent the hybrid sys-
tem from starting if a key
has not been previously
registered in the vehicle’s
on-board computer.
Never leave the keys inside
the vehicle when you leave
the vehicle.
This system is designed to
help prevent vehicle theft
but does not guarantee
absolute security against all
vehicle thefts.
Operating the system
NOTICE
■To ensure the system oper-
ates correctly
Do not modify or remove the sys-
tem. If modified or removed, the
proper operation of the system
cannot be guaranteed.

771-5. Theft deterrent system
1
For safety and security
*: If equipped
■Items to check before lock-
ing the vehicle
To prevent unexpected trigger-
ing of the alarm and vehicle
theft, make sure of the following:
 Nobody is in the vehicle.
 The windows and moon roof
(if equipped) are closed
before the alarm is set.
 No valuables or other per-
sonal items are left in the
vehicle.
■Setting
Close the doors and hood, and
lock all the doors. The system
will set automatically after 30
seconds.
The indicator light changes from
being on to flashing when the sys-
tem is set.
If all doors are cl osed with back
door or hood open, alarm system
can be set.
■Deactivating or stopping
Do one of the following to deac-
tivate or stop the alarms:
 Unlock the doors.
 Turn the power switch to ACC
or ON, or start the hybrid sys-
tem. (The alarm will be deacti-
vated or stopped after a few
seconds.)
■System maintenance
The vehicle has a mainte-
nance-free type alarm system.
■Triggering of the alarm
The alarm may be triggered in the
following situations:
(Stopping the alarm deactivates the
alarm system.)
●The doors are unlocked using the
mechanical key.
Alarm*
The alarm uses light and
sound to give an alert when
an intrusion is detected.
The alarm is triggered in the
following situations when
the alarm is set:
 A locked door is unlocked or
opened in any way other
than using the entry func-
tion or wireless remote con-
trol. (The doors will lock
again automatically.)
 The hood is opened.
Setting/deactivating/stop-
ping the alarm system

832-1. Instrument cluster
2
Vehicle status information and indicators
*1: These lights come on when the power switch is turned to ON to
indicate that a
system check is
being performed. They will turn
off after the hybrid system is
started, or after a few seconds.
There may be a malfunction in a
system if the lights do not come
on, or turn off. Have the vehicle
inspected by your Toyota dealer.
*2: This light comes on when the system is turned off.
*3: This light illuminates on the out-side rear view mirrors.
*4: This light illuminates on the multi-information display.
*5: When the outside temperature is approximately 37°F (3°C) or
lower, this indicator will flash for
approximately 10 seconds, then
stay on.
*6: This light illuminates on the air conditioning operation panel.
*7: This light illumina tes on the front
interior/personal lights.
Driving assist information
indicator
*1, 2 (
 P.408)
Intuitive parking assist
OFF indicator
*2 (if
equipped) ( P.268)
(Flashes)
Slip indicator*1 ( P.285)
VSC OFF indicator
*1, 2
(  P.286)
Smart key system indica-
tor
*4 (  P.174)
“READY” indicator
(  P.174)
(U.S.A.)
Parking brake indicator
( P.186)
(Canada)
Parking brake indicator
( P.186)
Brake hold standby indi-
cator ( P.189)
Brake hold operated indi-
cator ( P.189)
EV drive mode indicator
(  P.179)
EV indicator ( P. 6 9 )
Eco drive mode indicator
(  P.283)
Sport mode indicator (if
equipped) ( P.283)
Power mode indicator (if
equipped) ( P.283)
Low outside temperature
indicator
*5 (  P.84, 87)
Security indicator
*6
(  P.76, 77)
“AIR BAG ON/OFF”
indicator
*1, 7 ( P. 3 7 )

1153-2. Opening, closing and locking the doors
3
Before driving
3-2.Opening, closing and locking the doors
■Smart key system
Carry the electronic key to
enable this function.
1 Grip the driver’s door handle
to unlock the door. Holding
the driver’s door handle for
approximately 2 seconds
unlocks all the doors. Grip
the front passenger’s door
handle to unlock all the
doors.
*
Make sure to touch the sensor on
the back of the handle.
The doors cannot be unlocked for 3
seconds after the doors are locked.
*: The door unlock settings can be
changed. ( P.115, 463)
2 Touch the lock sensor (the
indentation on the side of the
front door handle) to lock all
the doors.
Check that the door is securely
locked.
■Wireless remote control
1 Locks all the doors
Check that the d oor is securely
locked.
2 Unlocks all the doors
Pressing the button unlocks the
driver’s door. Pressing the button
again within 3 seconds unlocks the
other doors.
Press and hold to open the win-
dows
*1and moon roof*1, 2.
*1: This setting must be customized
at your Toyota dealer.
*2: If equipped
■Switching the door unlock func-
tion
It is possible to set which doors the
entry function unlocks using the
wireless remote control.
1 Turn the power switch off.
2 When the indicator light on the
key surface is not on, press and
hold , (if equipped) or
for approximately 5 sec-
onds while pressing and holding
.
The setting changes each time an
operation is per formed, as shown
below. (When changing the setting
continuously, release the buttons,
wait for at least 5 seconds, and
repeat step 2 .)
Side doors
Unlocking and locking the
doors from the outside

1163-2. Opening, closing and locking the doors
For vehicles with an alarm: To pre-
vent unintended triggering of the
alarm, unlock the doors using the
wireless remote control and open
and close a door once after the set-
tings have been changed. (If a door
is not opened within 60 seconds
after is press ed, the doors will
be locked again an d the alarm will
automatically be set.)
In case that the alarm is triggered,
immediately stop the alarm. ( P. 7 7 )
■Impact detection door lock
release system
In the event that t he vehicle is sub-
ject to a strong impact, all the doors
are unlocked. Depending on the
force of the impact or the type of
accident, however, the system may
not operate.
■Operation signals
A buzzer sounds and the emer-
gency flashers flash to indicate that
the doors have been
locked/unlocked using the entry
function or wireless remote control.
(Locked: Once; Unlocked: Twice)
A buzzer sounds to indicate that the windows and moon roof
*are operat-
ing.
*: If equipped
■Security feature
If a door is not opened within
approximately 60 s econds after the
vehicle is unlocked using the entry
function or wireles s remote control,
the security featur e automatically
locks the vehicle again.
■When the door cannot be
locked by the lock sensor on
the surface of the front door
handle
If the doors cannot be locked by
touching the lock se nsor with a fin-
ger, touch the lock sensor with the
palm of your hand.
If you are wearing gloves, remove
them.
■Door lock buzzer
If an attempt to lock the doors using
the entry function or wireless remote
control is made when a door is not
fully closed, a b uzzer will sound
continuously for 5 seconds. Fully
close the door to stop the buzzer,
and lock the doors again.
■Alarm (if equipped)
Locking the doors will set the alarm
system. ( P. 7 7 )
■Conditions affecting the opera-
tion of the smart key system or
wireless remote control
 P.130
Multi-informa-
tion display/BeepUnlocking func- tion
Beeps 3 times
Holding the
driver’s door
handle unlocks
only the driver’s
door.
Holding the front
passenger’s
door handle
unlocks all the
doors.
Beeps twice
Holding either
front door handle
unlocks all the
doors.

1203-2. Opening, closing and locking the doors
WARNING
●Do not allow a child to open or
close the back door.
Doing so may cause the back
door to move unexpectedly, or
cause the child’s hands, arms,
head, or neck to be caught by the
closing back door.
■Operating the back door
Observe the following precau-
tions. Failure to do so may cause
parts of the body to be caught,
resulting in death or serious injury.
●Remove any heavy loads, such
as snow and ice, from the back
door before opening it. Failure
to do so may cause the back
door to suddenly shut again
after it is opened.
●When opening or closing the
back door, thoroughly check to
make sure the surrounding area
is safe.
●If anyone is in the vicinity, make
sure they are safe and let them
know that the back door is
about to open or close.
●Use caution when opening or
closing the back door in windy
weather as it may move
abruptly in strong wind.
●Vehicles with a power back
door: The power back door may
suddenly shut if it is not opened
fully. It is more difficult to open
or close the back door on an
incline than on a level surface,
so beware of the back door
unexpectedly opening or closing
by itself. Make sure that the
back door is fully open and
secure before using the luggage
compartment.
Vehicles without a power back
door: The back door may sud-
denly shut if it is not opened fully.
It is more difficult to open or close
the back door on an incline than
on a level surfac e, so beware of
the back door unexpectedly open-
ing or closing by itself. Make sure
that the back door is fully open
and secure before using the lug-
gage compartment.
●Vehicles with a power back
door: The back door may sud-
denly shut if it is not opened
fully while on a steep incline.
Make sure that the back door is
secured before using the lug-
gage compartment.
●When closing the back door,
take extra care to prevent your
fingers, etc., from being caught.

1213-2. Opening, closing and locking the doors
3
Before driving
■Smart key system
Carry the electronic key to
enable this function.
1 Unlocks all the doors
The doors cannot be unlocked for 3
seconds after the doors are locked.
2Locks all the doors
Check that the d oor is securely
locked.
■Wireless remote control
 P.115
■Luggage compartment light
●The luggage compartment light
turns on when the back door is
opened.
●If the luggage compartment light is
left on when the power switch is
turned off, the light will go off auto-
matically after 20 minutes.
■Operation signals
 P. 1 1 6
WARNING
●When closing the back door,
make sure to press it lightly on
its outer surface. If the back
door handle is used to fully
close the back door, it may
result in hands or arms being
caught.
●Do not pull on the back door
damper stay (vehicles without a
power back door) (
P.122) or
back door spindle (vehicles with
a power back door) (
P.127) to
close the back door, and do not
hang on the back door damper
stay (vehicles without a power
back door) or back door spindle
(vehicles with a power back
door).
Doing so may cause hands to be
caught or the back door damper
stay (vehicles without a power
back door) or back door spindle
(vehicles with a power back door)
to break, causing an accident.
●Do not pull on the back door
damper stay (
P.122) to close
the back door, and do not hang
on the back door damper stay.
Doing so may cause hands to be
caught or the back door damper
stay to break, causing an acci-
dent.
●If a heavy object is attached to
the back door, it may suddenly
shut again after being opened,
causing someone’s hands,
arms, head or neck to be caught
and injured. Do not attach any
accessories other than genuine
Toyota parts to the back door.
Unlocking and locking the
back door from the out-
side

1263-2. Opening, closing and locking the doors
WARNING
●Use caution when using the
back door closer as it still oper-
ates when the power back door
system is disabled.
■Power back door
Observe the following precautions
when operating the power back
door. Failure to d o so may cause
death or serious injury.
●Check the safety of the sur-
rounding area to make sure
there are no obstacles or any-
thing that could cause any of
your belongings to get caught.
●If anyone is in the vicinity, make
sure they are safe and let them
know that the back door is
about to open or close.
●If the power back door system is
disabled while the power back
door is operating, the back door
will stop operating. The back
door must then be operated
manually. Take extra care in this
situation, as th e back door may
open or close suddenly.
●If the operating conditions of the
power back door (
P.124) are
no longer met, a buzzer may
sound and the back door may
stop opening or closing. The
back door must then be oper-
ated manually. Take extra care
on an incline in this situation, as
the back door may move sud-
denly.
●On an incline, t he back door
may suddenly shut after it
opens. Make sure the back door
is fully open and secure.
●In the following si tuations, the
power back door may detect an
abnormality and automatic
operation may be stopped. In
this case, the back door must
then be operated manually.
Take extra care in this situation,
as the stopped back door may
suddenly open or close, causing
an accident.
• When the back door contacts an obstacle
• When the 12-volt battery volt- age suddenly drops, such as
when the power switch is turned
to ON or the hybrid system is
started during automatic opera-
tion
●If a heavy objec t is attached to
the back door, the back door
may not operate, causing a mal-
function, or the back door may
suddenly shut again after being
opened, causing someone’s
hands, arms, head or neck to be
caught and injured. Do not
attach any acce ssories other
than genuine Toyota parts to the
back door.
■Jam protection function
Observe the following precau-
tions. Failure to do so may cause
death or serious injury.
●Never use any part of your body
to intentionally activate the jam
protection function.
●The jam protection function may
not work if something gets
caught just before the back door
fully closes. Be careful not to
get fingers caught or anything
else.
●The jam protection function may
not work depending on the
shape of the object that is
caught. Be careful not to catch
fingers or anything else.