2024 MAZDA CX90 engine overheat

Engine Coolant
Temperature Gauge
Displays the engine coolant
temperature. The blue range of the
gauge indicates that the engine coolant
temperature is low, and the red range
of the gauge indicates that the engine
coolant temperature is high and
overheating.

CAUTION
If the engine coolant temperature
gauge needle is in the red range, there
is the possibility of overheating. Drive
slowly to reduce engine load.
Refer to Taking Action with
Overheating on page 8-20.
High Voltage Battery Powe r G au ge
The remaining power of the high
voltage battery is indicated when the
vehicle power is switched ON.
When the high voltage battery is fully
charged, F is indicated. As the level
lowers, the needle approaches E.

NOTE
After charging, it may require some
time for the needle to stabilize.
The arrow indicates that the
charging port is on the right side.
Driving
Instrument Cluster
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Do not connect a hydraulic
trailer-brake system to your vehicle's
brake system:
Connecting a hydraulic trailer-brake
system directly to the vehicle brake
system is dangerous and will result in
inadequate braking and possible injury.
Always use lower gears to reduce
speed:
Holding the brake pedal down too
long or too frequently is dangerous as
it could cause the brakes to overheat
and lose power, resulting in loss of
control and a serious accident. Use
lower gears to help reduce speed. Pull
off the road and allow brakes to cool
down whenever braking performance
feels reduced.
CAUTION
Do not tow a trailer during the first
1,000 km (600 miles) of your new
Mazda. If you do, you may damage
the engine, transmission, differential,
wheel bearings, and other
power-train components.
 Be aware of the towing load weight
differences when towing at high
altitudes. For altitudes exceeding
1,000 meter (3,280 ft 10 in), always
reduce the towing load by 10 % for
every 1,000 meter (3,280 ft 10 in)
increase in altitude from the load
indicated under the maximum
GCWR heading in the trailer
towing-load table. If the determined
maximum total towing load weight is
exceeded, the engine and other
power-train parts may be damaged.
 The total trailer weight and tongue
load can be determined by weighing
the trailer on platform scales at a
highway weight station or a trucking
company.
Make all hitch adjustments with
actual loads. Do not load and
unload vehicle while adjusting hitch.
This action will change the vehicle
height.
 Do not use an axle-mounted hitch.
This may damage the axle and
related parts.
 If the vehicle exceeds 100 km/h (62
mph) with a trailer in tow, the
vehicle could be damaged.
 Do not connect a trailer lighting
system directly to the lighting system
of your Mazda. This may damage
your vehicle's electrical system and
lighting systems. Have a recreational
vehicle dealer or trailer rental agency
connect the system, and inspect the
brake lights and turn signals yourself
before each trip.
Other Equipment
Towing (U.S.A. and Canada)
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How to Use the Towing
NOTE
The three main causes of vehicle-trailer accidents are driver error, excessive speed,
and improper trailer loading.
Trailer towing causes higher fuel consumption.The extra weight of the trailer may strain the engine on hot days and on long or
steep upgrades. If the temperature gauge indicates overheating, turn off the air
conditioner, drive safely to the side of the road, park off the right-of-way and wait
for engine to cool.
Verify that your Mazda maintains a near-normal attitude when a loaded or
unloaded trailer is connected. Do not drive if it has an abnormal front-up or
front-down position. Inspect for incorrec t tongue load, worn suspension parts,
and trailer overloading.
Make sure the trailer is properly loaded and the cargo is secure to prevent it from
shifting.
Make sure the mirrors conform to all govern ment regulations. If they do not, install
required rear view mirrors appropriate for towing purposes.
Trailer towing-load table
Because vehicle weights vary, adjustments must be made to meet the requirements
in this table.
(U.S.A.)
Limitation items Limit values
19 inch wheel ve- hicle 21 inch wheel ve-
hicle
MAX. TTW
1,588 kg (3,500 lb)
MAX. GCWR
4,150 kg (9,148 lb)
MAX. GAWR
Front 1,320 kg (2,910 lb) 1,313 kg (2,895 lb)
Rear 1,855 kg (4,090 lb) 1,797 kg (3,962 lb)
MAX. GVWR
3,109 kg (6,854 lb)
Other Equipment
Towing (U.S.A. and Canada)
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If swaying occurs, firmly grip the steering wheel and reduce speed immediately, but
gradually.
Steer straight ahead. If no extreme correction of steering or braking is made, the
combination of less speed and firm steering will result in stability.
Backing up
Backing a vehicle with a trailer requires practice and patience. Back slowly, and have
a helper outside at the rear of the trailer to reduce the risk of an accident.
To turn the trailer, place your hand at th e bottom of the steering wheel and turn it in
the direction you want the trailer to go. Make only slight movements to prevent
sharp or prolonged turning.
Ascending a hill
Shift into a lower gear to reduce the poss ibility of overloading or overheating the
engine, or both.
Descending a hill
Shift into a lower gear and use engine compression as a braking effect.
Pa r k i n g
Always make sure the tires of the trailer and the tow vehicle are blocked while
parked.
Apply the parking brake firmly and put the transmission in P.
Avoid parking on an incline, but if you must, follow these instructions:
1. Depress and hold down the brake pedal.
2. Have a helper put wheel blocks against the downhill side of all vehicle and trailer tires.
3. Then release the brake pedal slowly until the blocks bear the load.
If the grade is downhill, turn the steering wheel so that the front of the front
tires face the curb.
If it is uphill, face the rear of the front tires against the curb.
4. Firmly apply the parking brake.
5. Shift the transmission into P, and stop the engine.
To restart after parking on an incline:
1. With the transmission in P, start the engine. (Be sure to depress and hold the brake pedal.)
2. Shift into gear.
3. Release the parking brake (also the foot brake) and pull away from the wheel blocks. Stop; apply the parking brake and shift into P.
4. Have a helper retrieve the wheel blocks.
Maintenance
If you tow a trailer frequently, have your vehicle serviced as shown in Scheduled
Maintenance (page 9-4).
Other Equipment
Towing (U.S.A. and Canada)
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8What to Do in Case of Emergency
In Case of Emergency................ 8-4Dealing With an Accident....... 8-4
When Towing is Required...........8-5 Having the Vehicle Towed...... 8-5
Using the Towing Hooks......... 8-6
Key Does Not Operate............... 8-8 Canceling the Key Temporary
Suspension Function.............. 8-8
Unlocking Using the Auxiliary
Key....................................... 8-8
Starting the Hybrid System with a
Dead Key Battery................... 8-9
Engine Does Not Start.............. 8-11 Taking Action with Depleted
Lead-acid Battery................. 8-11
Starting a Flooded Engine..... 8-15
Charging Is Not Possible.......... 8-16 Dealing with the Cause........ 8-16
Hybrid System Cannot be
Stopped................................. 8-17 Forcibly Stopping the Hybrid
System................................ 8-17
Problem With the Brake System (Foot
Brake)....................................8-18 Applying the Emergency
Brake.................................. 8-18AUTOHOLD Cannot be
Canceled............................... 8-19Forcibly Canceling the
AUTOHOLD........................ 8-19
Overheating........................... 8-20 Ta k i n g A c t i o n w i t h
Overheating........................ 8-20
Tire is Punctured or Bursts........ 8-22 Changing a Flat Tire (With Spare
Tire).................................... 8-22
Liftgate Cannot Open.............. 8-30 Open the liftgate from the
luggage compartment.......... 8-30
The Power Windows Cannot Be
Operated............................... 8-31 Initializing the Power
Window.............................. 8-31
The Panorama Sunroof Cannot Be
Operated............................... 8-32 Initializing the Panorama
Sunroof............................... 8-32
The Moonroof Cannot Be
Operated............................... 8-33 Initializing the Moonroof...... 8-33
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Ta k i n g A c t i o n w i t hOverheating
If the engine coolant temperature
gauge indicates overheating and the
high engine coolant temperature
warning light is displayed, the vehicle
loses power or you hear a loud
knocking or pinging noise, the engine
is probably too hot.
WARNING
Pull over to a safe location, then
switch the vehicle power off and
make sure the fan is not running
before attempting to work near the
cooling fan.
Working near the cooling fan when it is
running is dangerous. The fan could
continue running indefinitely even if
the engine has stopped and the engine
compartment temperature is high. You
could be hit by the fan and seriously
injured.
Do not remove either
cooling system cap when the engine
and radiator are hot.
When the engine and radiator are hot,
scalding coolant and steam may shoot
out under pressure and cause serious
injury.
Open the hood ONLY after steam is
no longer escaping from the engine.
Steam from an overheated engine is
dangerous. The escaping steam could
seriously burn you.

1. Drive safely to the side of the road and park off the right-of-way.
2. Shift into park (P).
3. Apply the parking brake.
4. Turn off the air conditioner.
5. Check whether coolant or steam is escaping from the engine
compartment.

If steam is coming from the engine
compartment:
Do not go near the front of the
vehicle. Stop the engine.
Wait until the steam dissipates,
then open the hood and start the
engine.

If neither coolant nor steam is
escaping:
Open the hood and idle the engine
until it cools.
CAUTION
If the cooling fan does not operate
while the engine is running, the
engine temperature will increase.
Stop the engine and call an
Authorized Mazda Dealer.
6. Make sure the cooling fan is operating, then turn off the engine
after the temperature has
decreased.
7. When cool, check the coolant level. If it is low, look for coolant leaks
from the radiator and hoses.

What to Do in Case of Emergency
Overheating
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If you find a leak or other damage, or
if coolant is still leaking:
Stop the engine and call an Authorized
Mazda Dealer.
1. Cooling system cap
2. Coolant reservoir
3. Cooling fan
4. Radiator
If you find no problems, the engine is
cool, and no leaks are obvious:
Carefully add coolant as required
(page 9-14).
CAUTION
If the engine continues to overheat or
frequently overheats, have the cooling
system inspected. The engine could be
seriously damaged unless repairs are
made. Consult an Authorized Mazda
Dealer.
What to Do in Case of Emergency
Overheating
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Index
A
Active Driving Display................5-43Active driving display does not
operate................................ 8-36
Maintenance of the dust-proof
sheet................................... 9-39
Add-On Non-Genuine Parts and
Accessories............................. 10-25
Air Bags...................................... 3-4 Driver and front passenger
occupant classification
system................................. 3-16
Front passenger occupant
classification system.............. 3-16
Air-Conditioning Air vents................................ 6-2
Air-conditioning overview....... 6-6
Maintenance........................ 9-32
Operating each switch............ 6-8
Automatic Transmission Selector lever....................... 5-47
Steering shift switches........... 5-51
AWD i-ACTIV AWD....................... 5-98
B
BatteryCharging............................ 5-113
Charging is not possible........ 8-16
Electrical system................. 10-65
Inspecting Lead-acid
battery................................. 9-18
Taking action with depleted lead-
acid battery.......................... 8-11
Brakes
Antilock Brake System
(ABS)................................... 5-84
AUTOHOLD......................... 5-63
AUTOHOLD cannot be
canceled.............................. 8-19
Brake override system........... 5-61
Dynamic Stability Control
(DSC).................................. 5-88
Electric Parking Brake (EPB)....5-57
Hill descent control.............. 5-92
Hill Launch Assist (HLA)........ 5-66
Inspecting the brake fluid...... 9-16
Problem with the brake system
(foot brake)..........................8-18
Tra c t i o n C o n t ro l Sys te m
(TCS)................................... 5-85
Trailer Stability Control
(TSC)................................... 5-90
C
Cell Phones............................ 10-26
Cruise Control........................ 5-225
Customer Assistance (Canada)... 10-9
Customer Assistance (Mexico)...........
.............................................. 10-15
Customer Assistance (Puerto
Rico)...................................... 10-13
Customer Assistance (U.S.A.)..... 10-4
D
DoorsDoors.................................. 4-12
Liftgate................................. 4-18
E
EngineEngine................................10-62
Engine number................... 10-61
Inspecting the coolant.......... 9-14
Inspecting/replenishing engine
oil........................................9-13
Overheating......................... 8-20
Power switch........................ 5-13
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