| • | Review the exhaust system description and operation in order to
familiarize yourself with the system functions. Refer to
Exhaust System Description
. |
| • | All diagnostics on a vehicle follow a logical process. Strategy
Based Diagnostics is a uniform approach for repairing all systems. When
repairs are necessary start with the diagnostic flow to resolve system problems.
For instructions, refer to
Strategy Based Diagnosis
in General Information. |
Visual/Physical Inspection
| • | Inspect for aftermarket or non-OEM devices such as, but not including;
tail pipe extensions, headers, and exhaust cutouts. This could affect the
operation and performance of the exhaust system. |
| • | Verify the exact operating conditions under which the concern
exists. Note factors such as engine RPM, engine temperature, engine load,
and the frequency of the concern. |
| • | Inspect the easily accessible or visible system components for
damage or conditions which could cause any symptom. |
Intermittent
Test the vehicle under the same conditions that the customer reported
in order to verify the system is operating as designed.
Symptom List
Refer to a symptom diagnostic procedure from the following list in order
to diagnose the symptom:
| • | Exhaust buzz, groan, hum noise |
