VEHICLE BODY OR CLUTCH PEDAL VIBRATES/SHIFT OPERATION DIFFICULTY/NOISE HEARD [A26M-R, A26MX-R]

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Malfunction Symptom

• Vehicle body vibrates during idling or while driving
• Clutch pedal vibrates
• Shift operation is difficult because clutch does not fully release
• Teeth grinding noise is heard
• Booming noise is heard

Possible Cause

• Dual-mass flywheel malfunction

Diagnostic Procedure

1. Inspect the dual-mass flywheel. (See FLYWHEEL INSPECTION.)

2. Place the dual-mass flywheel on the surface plate so that the secondary flywheel is pointed upward.

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3. Set the dial gauge and magnetic stand on the surface plate.

4. Set the dial gauge pointer to the desired position at a diameter of 250 mm {9.84 in} around the center on the secondary flywheel.

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5. Apply a load of approx. 50 N {5.1 kgf, 11 lbf} to the friction surface which is opposed 180 degree to the dial gauge end, and measure the oscillation amount of the dial gauge.

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  • If the oscillation amount of the dial gauge exceeds the allowance, replace the dual-mass flywheel.

  Dual-mass flywheel oscillation allowance

  1.5 mm {0.059 in}