22

VIBRATION CONCERNS (ENGINE)

DESCRIPTION

• Vibration from under hood or driveline

POSSIBLE CAUSE

• Loose attaching bolts or worn parts

• Components malfunction such as worn parts

STEP

INSPECTION

RESULTS

ACTION

1

Inspect the following components for loose attaching bolts or worn parts:

• Cooling fan

• Drive belt and pulleys

• Generator

• Engine mounts

• Exhaust system mounts

All items normal?

Yes

Inspect the following systems:

• Wheels

• AT

• Driveline

• Suspension

No

Readjust or retighten engine mount installation position.

Service if necessary for other parts.

2

• Verify test results.

• If normal, return to diagnostic index to service any additional symptoms.

  (See SYMPTOM DIAGNOSTIC INDEX [LF].)

• If malfunction remains, inspect related Service Bulletins and/or On-line Repair Information and perform repair or diagnosis.

• If vehicle is repaired, troubleshooting completed.

• If vehicle is not repaired or additional diagnostic information is not available, replace the PCM.

  (See PCM REMOVAL/INSTALLATION [LF].)