NO.22 VIBRATION CONCERNS (ENGINE) [MZI-3.7]

id0103d2802800

22 | VIBRATION CONCERNS (ENGINE)
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DESCRIPTION | • Vibration from under bonnet or driveline.
POSSIBLE CAUSE | • Loose attaching bolts or worn parts ― Cooling fan ― Drive belt and pulleys ― Generator ― Engine mounts ― Exhaust mounts • Components malfunction such as worn parts ― Improper balance of wheels and tires ― Driveline malfunction ― Suspension malfunction

Diagnostic procedure

STEP | INSPECTION | RESULTS | ACTION
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1 | Inspect the following components for loose attaching bolts or worn parts: • Cooling fan • Drive belt and pulleys • Generator • Engine mounts • Exhaust system mounts Are all items normal? | Yes | Inspect the following systems: • Wheels • ATX • Driveline • Suspension Repair or replace the malfunctioning part according to the inspection results.
No | Readjust or retighten the 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 [MZI-3.7].) ― If malfunction remains, inspect related Service 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 [MZI-3.7].)