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Mazda CX 7. Manual - part 160

WHEEL AND TIRES

02-12–1

02-12

2007 Mazda CX-7 Workshop Manual (1871–1U–06B)

Revised 3/2007 (Ref. No. R051/07)

02-12

WHEEL AND TIRES

WHEEL AND TIRE SPECIFICATION . . . 02-12–1
WHEEL BALANCE ADJUSTMENT . . . . 02-12–2

Adhesive-type Balance Weight

(Outer). . . . . . . . . . . . . . . . . . . . . . . . 02-12–2

Knock-type Balance Weight (Inner) . . . 02-12–3
Remaining Amount of Unbalance

Confirmation. . . . . . . . . . . . . . . . . . . . 02-12–3

TIRE PRESSURE ADJUSTMENT

(WITH TPMS) . . . . . . . . . . . . . . . . . . . . 02-12–3

WHEEL UNIT ID REGISTRATION . . . . . . 02-12–4

Using M-MDS . . . . . . . . . . . . . . . . . . . . 02-12–4
Without Using M-MDS. . . . . . . . . . . . . . 02-12–4

WHEEL UNIT

REMOVAL/INSTALLATION . . . . . . . . . . 02-12–4

Valve Core Removal Note . . . . . . . . . . . 02-12–5
Wheel Unit Removal Note . . . . . . . . . . . 02-12–5
Wheel Unit Installation Note . . . . . . . . . 02-12–6

End of Toc

WM: WHEELS AND TIRES

WHEEL AND TIRE SPECIFICATION

id021200800100

Wheel and tire

: Total weight exceeds 160 g {5.65 oz}.

: One balance weight: 60 g {2.12 oz} max. If the total weight exceeds 100 g {3.53 oz} on one side, rebalance

after moving the tire around on the rim. Do not use three or more balance weights.

End Of Sie

Item

Specification

Standard tire and wheel

Wheel

Size

× 7 1/2J

Offset

(mm {in})

50 {1.97}

Pitch circle diameter

(mm {in})

114.3 {4.50}

Material

Aluminum alloy

Tire

Size

P235/60R18 102H

235/60R18 103H (Mexico spec.)

Air pressure
(kPa {kgf/cm

, psi})

Front

220 {2.2, 32}

230 {2.3, 34} (Mexico spec.)

Rear

220 {2.2, 32}

230 {2.3, 34} (Mexico spec.)

Remaining tread

(mm {in})

1.6 {0.06}

Wheel and
tire

Wheel and tire runout

Radial
direction

1.5 {0.06} max.

(mm {in}) Lateral

direction

2.0 {0.08} max.

Wheel imbalance

(g {oz})

Adhesive-type*

: 10 {0.35} max.

Knock-type*

: 6 {0.21} max.

Tightening torque

(N·m {kgf·m, ft·lbf})

88.2—117.6 {9.00—11.99, 65.06—86.73}

Temporary spare tire

Wheel

Size

× 4T

× 5J

Offset

(mm {in})

40 {1.57}

45 {1.77}

Pitch circle diameter

(mm {in})

114.3 {4.50}

Material

Steel

Tire

Size

T155/90D18 103M

205/80R16 100M

Air pressure
(kPa {kgf/cm

, psi})

420 {4.2, 60}

250 {2.5, 36}

Wheel and
tire

Wheel and tire runout

Radial
direction

2.0 {0.08} max.

(mm {in}) Lateral

direction

2.5 {0.10} max.

WHEEL AND TIRES

02-12–2

2007 Mazda CX-7 Workshop Manual (1871–1U–06B)

WHEEL BALANCE ADJUSTMENT

id021200800200

Caution

• Adjust the outer wheel balance first, then the inner wheel balance.

• Be careful not to scratch the wheels.

Adhesive-type Balance Weight (Outer)

1. Remove the old balance weight from the wheel.
2. Remove the double-sided adhesive tape remaining on the wheel, then clean and degrease the bonding area.
3. Set the wheel on a wheel balancer, measure the amount of unbalance and the position with the mode set for

knock-type balance weight.

4. Multiply the amount of unbalance by 1.6 to obtain the balance weight value.
5. Select a balance weight closest to the weight

value and attach the balance weight on the
position (outer) indicated by the wheel balancer.

Example calculation of balance weight value

Indicated amount of unbalance: 23 g {0.81

oz}

23 g {0.81 oz}

×1.6 = 36.8 g {1.30 oz}

Selected balance weight value: 35 g {1.24

oz}

Note

• When selecting a balance weight, select one

closest to the calculated value.
Example: 32.4 g {1.14 oz} = 30 g {1.06 oz}

Caution

• Use a genuine balance weight or equivalent (steel).

• When attaching the weight, press the weight with a force of 25 N {2.5 kgf, 5.5 lbf} per 5 g for 2 s or

more.

6. If attaching tow balance weights, position them so

that each is on either side of the position indicated
by the wheel balancer.

Caution

• Do not attach weight balances in a row.

• Do not overlap the balance weights.

• Total weight must not exceed 160 g {5.65

oz}.

ATTACH ALONG GAP

WHEEL

TIRE

CENTER OF
BALANCE WEIGHT

INNER

OUTER

POSITION INDICATED
BY WHEEL BALANCER

ADHESIVE-TYPE
BALANCE WEIGHT

acxuuw00001036

ATTACH ON EITHER SIDE

POSITION INDICATED BY WHEEL BALANCER

(DO NOT ATTACH
IN A ROW)

(DO NOT OVERLAP)

NO GOOD

acxuuw00001037

WHEEL AND TIRES

02-12–3

02-12

Knock-type Balance Weight (Inner)

1. Measure the amount of unbalance with a wheel balancer.
2. Attach a weight corresponding to the measured

weight value on the position (inner) indicated by
the wheel balancer.

Caution

• Do not attach three or more balance

weights.

• One balance weight must not exceed 60 g

{2.12 oz}, and a total of tow balance
weights must not exceed 100 g {3.53 oz}.

Remaining Amount of Unbalance Confirmation

1. After installing the outer and inner balance weights, operate the wheel balancer again.
2. Confirm that the remaining unbalance does not exceed the following on either side.

• If the remaining unbalance exceeds the specifications, adjust the wheel balance again.

Specifications

Outer (Adhesive-type): 10 g {0.35 oz}
Inner (Knock-type): 6 g {0.21 oz}

End Of Sie

TIRE PRESSURE ADJUSTMENT (WITH TPMS)

id021200800300

1. Use of a digital gauge is recommended for accurate measurement of the air pressure.
2. Tire pressure lowers gradually as time passes. Due to this, monthly air pressure inspection is recommended.
3. Perform tire pressure adjustment before driving. (When tires are cold.)

• Tire pressure will increase after driving because the internal temperature of the tire is high. If tire pressure

is adjusted to specifications when the internal temperature of the tire is high, tire pressure will decrease
when the internal temperature of the tire decreases to the same level as ambient temperature. If the tire
pressure is lower than the lower-limit pressure, the TPMS warning light may illuminate.

• Even though the air pressure is adjusted to specifications, the indicated air pressure may be higher than the

specified value when the internal temperature of the tire is higher than ambient temperature. (Example: Air
pressure changes approx. 10 kPa {0.1 kgf/cm

, 1.5 psi} when the temperature changes 10

°C {18 °F})

Caution

• In an area or a season with varying temperatures, tire pressure will change due to ambient

temperature change. If the tire pressure is lower than the lower-limit pressure due to low ambient
temperature, the TPMS warning light may illuminate. Adjust the pressure when the TPMS warning
light illuminates.

• Do not tilt or use excessive side force when checking air pressure or inflating the tire with air.

Which can provide enough leverage to easily bend or break the wheel unit.

• To prevent damage to the valve area of

the wheel unit or pressure loss during air
pressure adjustment, use a type B tool
with a round end as shown in the figure,
not a type A tool.

End Of Sie

WM: TIRE PRESSURE MONITORING SYSTEM

WHEEL

TIRE

CENTER OF
BALANCE WEIGHT

INNER SIDE

OUTER SIDE

POSITION INDICATED
BY WHEEL BALANCE

KNOCK-TYPE
BALANCE WEIGHT

acxuuw00001038

TYPE A

TYPE B

acxuuw00001039

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WHEEL AND TIRES

02-12–4

WHEEL UNIT ID REGISTRATION

id021200800400

Note

• After the wheel unit replacement, registration of the wheel unit identification codes must be performed.

• ID registration can be done using the M-MDS, or not using the M-MDS.

Using M-MDS

1. After the vehicle is identified, select the following items from the initialization screen of the M-MDS.

• This function is available for only the IDS (notebook PC).

1. Select the “Body” tab.
2. Select the “TPMS Functions”.
3. Select the “Wheel Unit ID Registration”.

2. Leave the vehicle with the engine off for 15 min or more.
3. Verify that the TPMS warning light turns on and off in 0.5 s cycles repeatedly.
4. Drive the vehicle at a speed of 25 km/h {15.5 mph} or more for 10 min to implement the wheel unit ID

registration.

Note

• If the ID registration is not completed even after driving the vehicle for 10 min or more at a speed of 25

km/h {15.5 mph} or more, the TPMS warning light flashes.

5. Verify that the TPMS warning light turns off.

Note

• If the wheel unit ID registration cannot be performed after driving 10 min or more, refer to the symptom

troubleshooting procedure.

Without Using M-MDS

1. Turn the ignition switch to the ON position, then turn it off.
2. Leave the vehicle with the engine off for 15 min or more.
3. Drive the vehicle at a speed of 25 km/h {15.5 mph} or more for 10 min or more.
4. After driving for 10 min, verify that the TPMS warning light does not flash and is not illuminated.

End Of Sie

WM: WHEEL SENSOR

WHEEL UNIT REMOVAL/INSTALLATION

id021200800600

1. Remove in the order indicated in the table.
2. Install in the reverse order of removal.
3. When replacing wheel unit (s), register the new wheel unit ID (s). (See 02-12-4 WHEEL UNIT ID

REGISTRATION.)

Note

• If the wheel unit is replaced with a new one, the ID registration must be performed. When the ID

registration is finished, the data for the new wheel unit is displayed on the M-MDS.

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Content .. 158 159 160 161 ..