During the last 10-15 years, vehicle design
and engineering have dramatically changed due to the following factors:
| • | Decreased fuel supplies |
| • | Corporate Average Fuel Economy requirements |
| • | Ability to withstand collision |
| • | Rising customer expectations |
Most Vehicle designs have evolved from full-frame construction to lighter
unibody designs. These designs transfer noise and vibration much more readily.
During this same period, options such as the following have become
increasingly popular:
| • | All-wheel or four-wheel drive |
Such options increase engine load and can also generate unwanted noise
and vibration.
Customer perception of quality can be directly linked to the presence
or absence of unwanted noise and vibration. A technician's ability to quickly
diagnose and repair a noise or vibration directly affects that customer's
loyalty to the dealership.
The intent of this sub-section of the service manual is to provide a
systematic approach to vehicle vibration diagnosis and correction. By using
Strategy Based Diagnosis and troubleshooting philosophies covered in this
sub-section, technicians will be able to provide effective and timely repairs.
