Mazda CX 7. Manual — part 174

SYMPTOM TROUBLESHOOTING

03-03–5

03-03

NO.3 ABNORMAL NOISE AND/OR VIBRATION FROM COUPLING COMPONENT

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Diagnostic procedure

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Abnormal noise and/or vibration from coupling component

[TROUBLESHOOTING HINTS]

• Abnormal noise and/or vibration from coupling component during driving

• Propeller shaft is malfunctioning or attached improperly.

• Engine mount or differential mount malfunction

• Resonance of rotating parts on vehicle (engine, propeller shaft, rear differential, tire, etc.)

• Resonance with engine vibration (mainly with exhaust system parts)

• Rear differential malfunction

• Coupling component malfunction

STEP

INSPECTION

ACTION

1

VERIFY DSC, PCM, AND AWD SYSTEM DTCS

• Verify DSC, PCM, and AWD system DTCs

using the M-MDS.

• Are there any DTCs present?

Yes

Go to applicable DTC inspection.

No

Go to next step.

2

VERIFY INSTALLATION CONDITION OF
VEHICLE PARTS

• Verify installation condition for following:

— Propeller shaft (including bending and

joint operation)

— Center bearing

— Engine mount

— Differential mount

— Hub bearing

— Exhaust system parts

— ABS wheel-speed sensor

• Are they properly installed?

Yes

Go to next step.

No

Repair or replace malfunctioning part.

3

DETERMINE IF MALFUNCTION IS CAUSED
BY REAR DIFFERENTIAL

• Install tires of another brand.

Note

• When tires of another brand are

installed, the same malfunction can
occur due to conditions different from
customer explanation. Be careful not
to confuse it with customer complaint.

• Perform simulation driving at the same

engine speed, gear position, and vehicle
speed that customer vehicle had
malfunction.

• Does the same malfunction occur?

Yes

Reinstall customer’s vehicle tire. Go to next step.

No

AWD system is okay.
Reinstall customer’s vehicle tire.

4

INSPECT REAR DIFFERENTIAL

• Inspect rear differential for following:

— Backlash

— Teeth contact

(See 03-14-10 REAR DIFFERENTIAL

ASSEMBLY)

• Are they okay?

Yes

Replace coupling component.

No

Inspect malfunctioning part and adjust it if necessary.

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GENERAL PROCEDURES

03-10–1

03-10

03-10

GENERAL PROCEDURES

GENERAL PROCEDURES

(FRONT AND REAR AXLES) . . . . . . . 03-10–1

Wheel and Tire Installation . . . . . . . . . 03-10–1

Suspension Links

Removal/Installation . . . . . . . . . . . . . . 03-10–1

Connector Disconnection . . . . . . . . . . . 03-10–1
Electronic AWD Control System

Parts. . . . . . . . . . . . . . . . . . . . . . . . . . 03-10–1

End of Toc

WM: DRIVELINE/AXLE

GENERAL PROCEDURES (FRONT AND REAR AXLES)

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Wheel and Tire Installation

1. When installing the wheels and tires, tighten the

wheel nuts in a criss-cross pattern to the following
tightening torque.

Tightening torque

88.2— 117.6 N·m {9.00— 11.99 kgf·m,

65.06— 86.73 ft·lbf}

Suspension Links Removal/Installation

1. For the joint sections with rubber bushings, raise the vehicle using a lift, and then temporarily tighten the

installation bolts and nuts. Lower the vehicle to the ground and tighten them completely with the specified
torque.

Connector Disconnection

1. Disconnect the negative battery cable before performing any work that requires handling of connectors. (See

01-17-2 BATTERY REMOVAL/INSTALLATION[L3 WITH TC].)

Electronic AWD Control System Parts

1. After servicing the electronic AWD control system parts, verify that no DTC has been stored. Clear any DTCs

remaining in the memory.

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