2003 MAZDA MODEL B-SERIES cooling

Trailer tow connector
Color Function Comment
3. Tan/White Tail lamp Relay controlled circuit
activated when the park
lamps/headlamps are on.
4. White Ground Matching vehicle circuit
returns to battery's negative
ground.
Driving while you tow
When towing a trailer:
²Turn off the speed control. The speed control may shut off
automatically when you are towing on long, steep grades.
²Consult your local motor vehicle speed regulations for towing a trailer.
²To eliminate excessive shifting, use a lower gear. This will also assist
in transmission cooling. (For additional information, refer to the
Driving with a 5±speed automatic transmissionsection in this
chapter.
²Anticipate stops and brake gradually.
²Do not exceed the GCWR rating or transmission damage may occur.
Servicing after towing
If you tow a trailer for long distances, your vehicle will require more
frequent service intervals. Refer to your service maintenance section for
more information.
Trailer towing tips
²Practice turning, stopping and backing up before starting on a trip to
get the feel of the vehicle trailer combination. When turning, make
wider turns so the trailer wheels will clear curbs and other obstacles.
²Allow more distance for stopping with a trailer attached.
²The trailer tongue weight should be 10±15% of the loaded trailer
weight.
²After you have traveled 80 km (50 miles), thoroughly check your
hitch, electrical connections and trailer wheel lug nuts.
²To aid in engine/transmission cooling and A/C efficiency during hot
weather while stopped in traffic, place the gearshift lever in P (Park)
(automatic transmission) or N (Neutral) (manual transmissions).
Driving
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Fuse/Relay
LocationFuse Amp
RatingPower Distribution Box Description
13 Ð Not used
14 Ð Not used
15 Ð Not used
16 40A** Blower motor
17 20A** Auxiliary cooling fan
18 Ð Not used
19 Ð Not used
20 Ð Not used
21 10A* PCM memory
22 Ð Not used
23 20A* Fuel pump motor
24 30A* Headlamps
25 10A* A/C clutch relay
26 Ð Not used
27 Ð Not used
28 30A* ABS module
29 Ð Not used
30 15A* Trailer Tow
31 20A* Foglamp, Daytime Running Lamps (DRL)
32 Ð Not used
33 15A* Park lamp, Central security module
34 Ð Not used
35 Ð Not used
36 Ð Not used
37 Ð Not used
38 10A* Left headlamp low beam
39 Ð Not used
40 Ð Not used
41 20A* Heated oxygen sensors
42 10A* Right headlamp low beam
43 Ð (Resistor)
Roadside Emergencies
147

Fuse/Relay
LocationFuse Amp
RatingPower Distribution Box Description
44 Ð Not used
45A Ð Wiper HI/LO relay
45B Ð Wiper park/run relay
46A Ð Fuel pump relay
46B Ð Trailer tow relay
47 Ð Starter relay
48 Ð Auxiliary cooling fan relay
49 Ð Not used
50 Ð Not used
51 Ð Not used
52 Ð Not used
53 Ð PCM Diode
54 Ð PCM Relay
55 Ð Blower motor relay
56A Ð A/C clutch relay
56B Ð Front washer pump relay
* Mini Fuses ** Maxi Fuses
Roadside Emergencies
148

to the ON position without starting the engine. The radiator cooling
fans will start to cool the engine.
²If neither coolant nor steam is escaping:open the hood and idle
the engine until it cools. If this does not lower the temperature, stop
the engine and let it cool.
5. Check the coolant level. If it is low, look for leaks in the radiator
hoses and connections, heater hoses and connections, radiator and
water pump.
If you find a leak or other damage, or if coolant is still leaking, stop the
engine and call an Authorized Mazda dealer.
SeeAdding coolantin theMaintenance and specificationssection. If
you find no problems, the engine is cool and no leaks are obvious,
carefully add coolant as required.
WARNING: When the engine and radiator are hot, scalding
coolant and steam may shoot out under pressure and cause
serious injury. Do not remove the cooling system cap when the
engine and radiator are hot.
Note:If the engine continues to overheat or frequently overheats, have
the cooling system inspected. The engine could be seriously damaged
unless repairs are made.
CHANGING THE TIRES
If you get a flat tire while driving, do not apply the brake heavily.
Instead, gradually decrease your speed. Hold the steering wheel firmly
and slowly move to a safe place on the side of the road.
WARNING: The use of tire sealants is not recommended and
may compromise the integrity of your tires.
Conventional spare tire information
If you have the conventional spare tire, you can use it as a spare or a
regular tire. The spare is identical to the other tires on your vehicle,
although the wheel may not match.
Roadside Emergencies
152

Preparing your vehicle
When the battery is disconnected or a new battery is installed, the
transmission must relearn its shift strategy. As a result, the transmission
may have firm and/or soft shifts. This operation is considered normal and
will not affect function or durability of the transmission. Over time, the
adaptive learning process will fully update transmission operation.
1.Use only a 12±volt supply to start your vehicle.
2. Do not disconnect the battery of the disabled vehicle as this could
damage the vehicle's electrical system.
3. Park the booster vehicle close to the hood of the disabled vehicle
making sure the two vehiclesdo nottouch. Set the parking brake on
both vehicles and stay clear of the engine cooling fan and other
moving parts.
4. Check all battery terminals and remove any excessive corrosion
before you attach the battery cables. Ensure that vent caps are tight
and level.
5. Turn the heater fan on in both vehicles to protect any electrical
surges. Turn all other accessories off.
Connecting the jumper cables
1. Connect the positive (+) booster cable to the positive (+) terminal of
the discharged battery.
Note:In the illustrations,lightning boltsare used to designate the
assisting (boosting) battery.
+–+–
Roadside Emergencies
159

Chart symbols
I: Inspect, and if necessary correct, clean or replace
A: Adjust
R: Replace
L: Lubricate
Normal driving service intervals ± perform at the months or distances
shown, whichever occurs first.
Maintenance ItemMaintenance Interval (Number of months or km (miles),
whichever comes first)
Months 4 8 12 16 20 24 28 32 36 40 44 48
x 1000 Miles 5 10 15 20 25 30 35 40 45 50 55 60
(x 1000 km) (8) (16) (24) (32) (40) (48) (56) (64) (72) (80) (88) (96)
ENGINE
Engine oil Ðevery 6 months RRRRRRRRRRR R
Oil filterÐevery 6 months RRRRRRRRRRR R
PCV valve
AIR CLEANER
Air cleaner filter R R
IGNITION SYSTEM
Spark plugs *4
COOLING SYSTEM
Engine Coolant (green) Replace at first 45,000 miles (72,000 km) or 36
months, after that, every 30,000 miles (48,000 km)
or 24 months
Engine Coolant (yellow) Replace at first 100,000 miles (160,000 km) or 60
months, after that, every 50,000 miles (80,000 km)
or 36 months
Coolant condition and protection,
hoses and clamps Ð annually Ðprior
to cold weather every 12 monthsIII I
CHASSIS AND BODY
Wheel lug nut torque *1 IIIIIIIIIII I
Inspect tires for wear and rotate (X =
recommended interval for optimal
tire life)IXIXXIXXIXX I
Clutch reservoir fluid level IIIIII
Front wheel bearings (4x2) L
Disc brake system I I I I
Maintenance and Specifications
183

5. The California Air Resources Board has determined that the failure
to perform this maintenance item will not nullify the emission
warranty nor limit recall liability prior to completion of the vehicle's
useful life.
Maintenance ItemMaintenance Interval (Number of months or Miles (km),
whichever comes first)
Months 52 56 60 64 68 72 76 80 84 88 92 96
x 1000 Miles 65 70 75 80 85 90 95 100 105 110 115 120
(x 1000 km) (104) (112) (121) (128) (136) (144) (152) (160) (168)(176)(184) (192)
ENGINE
Engine oil Ðevery 6 months RRRRRRRRRRRR
Oil filterÐevery 6 months RRRRRRRRRRRR
PCV valve R
AIR CLEANER
Air cleaner filter R R
IGNITION SYSTEM
Spark plugs *4 R
COOLING SYSTEM
Engine Coolant (green) Replace at first 45,000 miles (72,000 km) or 36
months, after that, every 30,000 miles (48,000 km) or
24 months
Engine Coolant (yellow) Replace at first 100,000 miles (160,000 km) or 60
months, after that, every 50,000 miles (80,000 km) or
36 months
Coolant condition and
protection, hoses and clamps Ð
annually Ðprior to cold weather
every 12 monthsIIII
CHASSIS AND BODY
Wheel lug nut
torque*1I IIIIIIIIIII
Inspect tires for wear and rotate
(X = recommended interval for
optimal tire life)XXIXXIXXIXXI
Clutch reservoir fluid level IIIIII
Front wheel bearings (4x2) L
Disc brake systemIIII
Caliper slide railsLLLL
Maintenance and Specifications
185

²Check cooling system fluid level and coolant strength.
²Check battery water level (non-maintenance free).
²Check battery connections and clean if necessary.
SERVICE RECOMMENDATIONS
To help you service your vehicle:
²We highlight do-it-yourself items in the engine compartment for easy
location.
²We provide a Scheduled Maintenance section which makes tracking
routine service easy.
If your vehicle requires professional service, your dealership can provide
necessary parts and service. Check your ªWarranty Informationº to find
out which parts and services are covered.
Use only recommended fuels, lubricants, fluids and service parts
conforming to specifications. Genuine Mazda parts are designed and built
to provide the best performance in your vehicle.
PRECAUTIONS WHEN SERVICING YOUR VEHICLE
²Do not work on a hot engine.
²Make sure that nothing gets caught in moving parts.
²Do not work on a vehicle with the engine running in an enclosed
space, unless you are sure you have enough ventilation.
²Keep all open flames and other lit material away from the battery and
all fuel related parts.
Working with the engine off
²Automatic transmission:
1. Set the parking brake and shift to P (Park).
2. Turn off the engine and remove the key.
3. Block the wheels.
²Manual transmission:
1. Set the parking brake, depress the clutch and place the gearshift in 1
(First).
2. Turn off the engine and remove the key.
3. Block the wheels.
Maintenance and Specifications
190