Strategy Based Diagnostics
Review the system operations in order to familiarize yourself with the system
functions. Refer to
Transfer Case Disassembled View
in Transfer Case -
NVG 900 Unit Repair,
Transfer Case Description and Operation
, and
Rear Drive Axle Description and Operation
in Rear Drive Axle. All diagnosis on a vehicle should follow
a logical process. Strategy based diagnostics is a uniform approach for repairing
all systems. The diagnostic flow may always be used in order to resolve a system condition.
The diagnostic flow is the place to start when repairs are necessary. For a detailed
explanation, refer to
Strategy Based Diagnosis
in
General Information.
Visual/Physical Inspection
| • | Inspect the easily accessible or visible system components for obvious
damage or conditions which could cause the symptom. |
| • | Verify the exact operating conditions under which the concern exists.
Note factors such as speed, road conditions, ambient temperature, and other specifics. |
| • | Compare the driving characteristics or sounds, if applicable, to a known
good vehicle and ensure you are not trying to correct a normal condition. |
Intermittent
Test the vehicle under the same conditions that the customer reported in order
to verify the system is operating properly.
Symptom List
Refer to a symptom diagnostic procedure from the following list in order to
diagnose the symptom:
