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

id0103d2802800

22

VIBRATION CONCERNS (ENGINE)

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

22	VIBRATION CONCERNS (ENGINE)
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
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.
1		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].)