2024 MAZDA CX90 ECU

3. Pass the flat tire belt through thebuckle.
4. Pull the end of the flat tire beltand secure the sub-woofer and
the wiring harness to the flat
tire.
CAUTION
When pulling the flat tire belt,
wrap the buckle with a cloth. If
the buckle directly contacts the
sub-woofer, the sub-woofer
may be damaged.
5. Secure the flat tire in the luggage compartment using the
flat tire belt.
1. Pull the flat tire belts out ofthe buckle to separate them
into two belts.
2. Hook the clips of the flat tirebelts to the hooks under the
third-row seat.
CAUTION
Be careful that a flat tire belt
does not get caught on a seat
belt.
3. Place the flat tire in the luggage compartment so that
it leans against the luggage
board.
4. Pass the flat tire beltsthrough the wheel of the flat
tire.
What to Do in Case of Emergency
Tire is Punctured or Bursts
8-28
CX-90_8KG7-EA-22L_Edition1_new 2022-11-17 16:05:04

5. Pass the flat tire beltsthrough the buckle.
6. While pressing the flat tireagainst the third-row seat,
pull the ends of the flat tire
belts and secure the flat tire.
CAUTION
When pulling the flat tire
belts, wrap the buckle with a
cloth. If the buckle directly
contacts the aluminum
wheel, the wheel may be
damaged.
7. Slowly close the liftgate while making sure that the liftgate trim
does not contact the flat tire.
NOTE
If the liftgate trim contacts the flat
tire, adjust the position of the flat
tire.
8. Make sure that the liftgate closes securely.
9. Check the tire inflation pressure.
Refer to the specification charts on
page 10-37.
10.Have the flat tire repaired or replaced as soon as possible.
WARNING
Do not drive with any tires that have
incorrect air pressure.
Driving on tires with incorrect air
pressure is dangerous. Tires with
incorrect pressure could affect
handling and result in an accident.
When you check the regular tires' air
pressure, check the spare tire, too.
NOTE
To prevent the jack and tool from
rattling , store them properly.
What to Do in Case of Emergency
Tire is Punctured or Bursts
8-29
CX-90_8KG7-EA-22L_Edition1_new 2022-11-17 16:05:04

Check Engine WarningLight
WARNING
Do not disconnect the lead-acid
battery cables when the check engine
warning light is turned on/flashing.
The engine may be damaged when
reconnecting the lead-acid battery
cables, which could result in a fire.
The light turns on if the engine has a
problem while it is running.
Park the vehicle in a safe place
immediately and contact an
Authorized Mazda Dealer.
If any of the following problems occur,
the check engine warning light turns
on.
There is a problem with the hybrid
system
There is a problem with the emission
control system
There is a problem with the
transmission control system
The fuel tank level being very low or
approaching empty.
The fuel-filler cap is missing or not
tightened securely
If the check engine warning light
remains turned-on/flashing, do not
drive at high speed and have the
vehicle inspected by an Authorized
Mazda Dealer as soon as possible.
Automatic Transmission Warning Light
The light turns on if the system has a
problem.
Contact an Authorized Mazda Dealer.
CAUTION
Do not drive the vehicle with the
automatic transmission warning light
turned on. If the vehicle continues to
be driven while the automatic
transmission warning light is turned on,
the transmission could be damaged.
Have your vehicle inspected by an
Authorized Mazda Dealer as soon as
possible.
What to Do in Case of Emergency
Warning/Indicator Light Turns On
8-45
CX-90_8KG7-EA-22L_Edition1_new 2022-11-17 16:05:04

KEY Warning Light (Red)
The light turns on if the system has a
problem or if the key is out of the
operation range.
Check the contents of the message
displayed and take the necessary
action.
CAUTION
If the power switch indicator light
(amber) flashes at the same time, the
hybrid system may not start. Have the
vehicle inspected by an Authorized
Mazda Dealer as soon as possible.
Security Indicator Light
If the security indicator light turns on/
flashes while driving , do not stop the
hybrid system (leave it operating) and
have the vehicle inspected at an
Authorized Mazda Dealer. If you stop
the hybrid system , you may not be
able to start it again.
If the hybrid system cannot be started,
switch the vehicle power OFF, place
the key in another position within the
operation range, and then restart the
hybrid system.
Check the security indicator light and if
it does not turn off, such as it remains
on or flashes, switch the vehicle power
OFF, wait for a while, and then restart
the hybrid system.
If the hybrid system does not start after
three attempts, a system malfunction
may have occurred. Have the vehicle
inspected by an Authorized Mazda
Dealer.
NOTE
When repairing the immobilizer
system, the key codes will need to be
reprogrammed. Bring all the remaining
keys to an Authorized Mazda Dealer.
What to Do in Case of Emergency
Warning/Indicator Light Turns On
8-48
CX-90_8KG7-EA-22L_Edition1_new2022-11-17 16:05:04

Door-ajar Warning Light/Liftgate-open Warning Light/Hood-open
Warning Light
The light turns on if any door/liftgate/
hood is not closed securely.
Close the door/liftgate/hood securely.
KEY Indicator Light(Green) (Flashing)
The light flashes if the battery power of
the key is low when the vehicle power
is switched from ON to OFF.
Replace the key battery.
What to Do in Case of Emergency
Warning/Indicator Light Turns On
8-54
CX-90_8KG7-EA-22L_Edition1_new 2022-11-17 16:05:04

4.
5. Make sure that the engine cover is securely closed.
Inspection and Servicing/Cleaning
Engine Compartment Inspection
9-12
CX-90_8KG7-EA-22L_Edition1_new2022-11-17 16:05:04

Inspect the antifreeze protection and
coolant level in the coolant reservoir at
least once a year―at the beginning of
the winter season ―and before
traveling where temperatures may drop
below freezing.

Inspect the condition and connections
of all cooling system and heater hoses.
Replace any that are swollen or
deteriorated.

There are two cooling circuits: one for
the automatic transmission, and the
other for the engine. Check both
circuits.
The coolant should be at full in the
radiator and between the F and L
marks, and between the FULL and
LOW marks on the coolant reservoir
when the engine is cool.
There are two coolant reservoir tanks.
Check each of them.
1. The tank for the EV system
2. The tank for the engine

If it is at or near the LOW position, add
enough coolant to the coolant
reservoir to provide freezing and
corrosion protection and to bring the
level to FULL.
Securely tighten the coolant reservoir
tank cap after adding coolant.
CAUTION
 Radiator coolant will damage paint.
Rinse it off quickly if spilled.
 If the “FL22” mark is shown on or
near the cooling system cap, use of
FL-22 is recommended when
replacing engine coolant. Using
engine coolant other than FL-22 may
cause serious damage to the engine
and cooling system.

If the coolant reservoir is empty or new
coolant is required frequently, consult
an Authorized Mazda Dealer.
Inspection and Servicing/Cleaning
Engine Compartment Inspection
9-15
CX-90_8KG7-EA-22L_Edition1_new 2022-11-17 16:05:04

3.

Installing the Hole Cover
1. Insert the hole cover into the cowlgrille.
Make sure that the hole cover holds
the cowl grille and the knobs are in
the correct position.
1. The hole cover
2. The cowl grille
2.

Removing the Lead-acid Battery Cover

Maintaining Lead-acid Battery
To get the best service from a lead-acid
battery:
Keep it securely mounted.Keep the top clean and dry.Keep terminals and connections
clean, tight, and coated with
petroleum jelly or terminal grease.
Rinse off spilled electrolyte
immediately with a solution of water
and baking soda.
Inspection and Servicing/Cleaning
Engine Compartment Inspection
9-20
CX-90_8KG7-EA-22L_Edition1_new 2022-11-17 16:05:04