Flow of Diagnosis

The preliminary diagnosis starts with the customer interview. The history of the problem must be investigated: When was it first noticed? Did it appear suddenly or gradually? Did any abnormal occurrence coincide with or precede its appearance (such as pothole or curb impacts, minor collisions, etc.)? Were any repair procedures performed or parts replaced? It is also necessary to know any special conditions affecting the appearance and degree of the problem, such as road speed, type of road, drive mode, engine temperature, ambient temperature, etc.

A gradual appearance of the problem indicates a deterioration of a component, such as tires or front wheel bearings.

A sudden appearance of the problem could indicate a lost wheel balance weight.