Strategy Based Diagnostics
Review the system operations in order to familiarize yourself with the system functions. Refer to
Driveline Disassembled Views
,
Propeller Shaft Description and Operation
,
Transfer Case Description and Operation
for the transfer case NVG900 and
Rear Drive Axle Description and Operation
. 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 problem. The diagnostic flow is the place to start when repairs are necessary. For a detailed explanation, refer to
Strategy Based Diagnosis
.
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 make sure 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:
