2017 MAZDA MX5 MIATA cooling

6 –57 Maintenance and Care
Owner Maintenance
*Some models.DESCRIPTION FUSE
RATING PROTECTED COMPONENT
18 A/C MAG 7.5 A Air conditioner
19 AT PUMP
H/L HI 20 A Transmission control system *
20 AT 15 A Transmission control system *
21 D LOCK 25 A Power door locks
22 H/L RH 20 A Headlight (RH)
23
ENG
B2 7.5 A Engine control system
24 TAIL 20 A Taillights, License plate lights, Parking lights
25 DRL 15 A —
26 ROOM 25 A Overhead light
27 FOG 15 A —
28 H/CLEAN 20 A —
29 STOP 10 A Brake lights
30 HORN 15 A Horn
31 H/L LH 20 A Headlight (LH)
32 ABS/DSC S 30 A ABS, Dynamic stability control system
33 HAZARD 15 A Hazard warning flashers, Turn signal lights
34 FUEL PUMP 15 A Fuel system
35
ENG B3 5 A —
36 WIPER 20 A Windshield wipers
37
CABIN
B 50 A For protection of various circuits
38 — — —
39 — — —
40 ABS/DSC M 50 A ABS, Dynamic stability control system
41 EVVT
A/R PUMP 20 A Engine control system
42 EVPS 30 A Brake control system
43 FAN1 30 A Cooling fan
44 FAN2 40 A —
45 ENG.MAIN 40 A Engine control system
46 EPS 60 A Power steering system
47 DEFOG 30 A Rear window defogger
48 IG2 30 A For protection of various circuits
49 INJECTOR 30 A Engine control system
50 HEATER 40 A Air conditioner
51 — — —
52 — — —
MX-5_8FR4-EA-16J_Edition1.indb 57 2016/08/11 20:29:50

7 –23 If Trouble Arises
Battery Runs Out
Jump-StartingJump-starting is dangerous if done incorrectly. So follow the procedure carefully. If you
feel unsure about jump-starting, we strongly recommend that you have a competent service
technician do the work.
WARNING Follow These Precautions Carefully:
To ensure safe and correct handling of the battery, read the following precautions
carefully before using the battery or inspecting it.
Do not allow the positive ( ) terminal to contact any other metal object that
could cause sparks:
Flames and sparks near open battery cells are dangerous. Hydrogen gas, produced
during normal battery operation, could ignite and cause the battery to explode. An
exploding battery can cause serious burns and injuries. When working near a battery, do
not allow metal tools to contact the positive (
) or negative ( ) terminal of the battery.
Keep all flames, including cigarettes, and sparks away from open battery cells:
Flames and sparks near open battery cells are dangerous. Hydrogen gas, produced
during normal battery operation, could ignite and cause the battery to explode. An
exploding battery can cause serious burns and injuries.
Do not jump-start a frozen battery or one with a low fluid level:
Jump-starting a frozen battery or one with a low fluid level is dangerous. It may rupture
or explode, causing serious injury.
Connect the negative cable to a good ground point away from the battery:
Connecting the end of the second jumper cable to the negative (
) terminal of the
discharged battery is dangerous.
A spark could cause the gas around the battery to explode and injure someone.
Route the jumper cables away from parts that will be moving:
Connecting a jumper cable near or to moving parts (cooling fans, belts) is dangerous. The
cable could get caught when the engine starts and cause serious injury.
MX-5_8FR4-EA-16J_Edition1.indb 23 2016/08/11 20:30:00

7 –27 If Trouble Arises
Overheating
OverheatingIf the high engine coolant temperature
warning light turns on, 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 ignition 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. If the high engine coolant temperature
warning light turns on:
1. Drive safely to the side of the road and
park off the right-of-way.
2. Put a vehicle with an automatic
transmission in park (P), a manual
transmission in neutral.
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.
MX-5_8FR4-EA-16J_Edition1.indb 27 2016/08/11 20:30:01

7 –28 If Trouble Arises
Overheating If you find a leak or other damage, or if
coolant is still leaking:
Stop the engine and call an Authorized
Mazda Dealer. Coolant reservoir
Cooling fa nCooling system cap
If you find no problems, the engine is
cool, and no leaks are obvious:
Carefully add coolant as required (page
6-29 ).
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.
MX-5_8FR4-EA-16J_Edition1.indb 28 2016/08/11 20:30:01