If you have not completed the Vibration Analysis tables as indicated and reviewed Vibration
Diagnostic Aids, refer to Vibration Diagnostic Aids BEFORE proceeding.
Check Service Bulletins
If BOTH of the following statements are TRUE, then check service bulletins for the condition
identified. If the condition has already been identified and investigated prior to this vehicle, and
has been determined to be something that is not truly an operating characteristic or that perhaps
is not design-intent, there will likely be adjustments or corrections identified which will address
the condition.
You CAREFULLY followed the steps indicated through reviewing the Diagnostic Starting Point
– Vibration Diagnosis and completing the Vibration Analysis tables identified and you have
duplicated the vibration concern.
You have come to the conclusion through comparison with a very equally-equipped, same
model year and type, KNOWN GOOD vehicle that the customer’s concern is a condition that
appears to be a potential operating characteristic of the vehicle.