F2–220
TROUBLESHOOTING
NO.22 VIBRATION CONCERNS (ENGINE)
A6E408018881224
Diagnostic Procedure
22 VIBRATION CONCERNS (ENGINE)
DESCRIPTION • Vibration from under hood or driveline.
POSSIBLE
CAUSE
• Loose attaching bolts or worn parts
• Cooling fan No.1 or cooling fan No.2 seat are improper
• Engine or transaxle mounts are improperly installed
• Components malfunction such as worn parts
• Erratic signal from CMP sensor
• ECT sensor or related circuit malfunction
• Accelerator position sensor or related circuit malfunction
• MAF/IAT sensor or related circuit malfunction
• Idle switch or related circuit malfunction
• Incorrect adjustment of accelerator position sensor and/or idle switch
• Fuel injector malfunction
• Vacuum leakage
• Improper tension or damaged drive belts
• Improper balance of wheels or tires
• Driveline malfunction
• Suspension malfunction
Warning
The following troubleshooting flow chart contains the fuel system diagnosis and repair
procedures. Read the following warnings before performing the fuel system services:
• Fuel vapor is hazardous. It can easily ignite, causing serious injury and damage. Always keep
sparks and flames away from fuel.
• Fuel line spills and leakage are dangerous. Fuel can ignite and cause serious injury or death
and damage. Fuel can also irritate skin and eyes. To prevent this, always complete “BEFORE
REPAIR PROCEDURE” and “AFTER REPAIR PROCEDURE” described in this manual.
STEP INSPECTION RESULTS ACTION
1 Inspect following components for loose attaching
bolts or worn parts:
• Cooling fan No.1
• Cooling fan No.2
• Cooling fan No.1 and cooling fan No.2 seat
• Drive belt and pulley
• Engine mounts
• Exhaust system
Are all items okay?
Yes Go to next step.
No Readjust or retighten engine mount installation
position.
Service as necessary for other parts.
2 Inspect vacuum leakage.
Are vacuum hoses okay?
Yes Go to next step.
No Service as necessary.
Repeat Step 2.
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