Strategy Based Diagnostics
Review the system operations in order to familiarize yourself with the system functions. Refer to
Propeller Shaft Description and Operation,
Transfer Case Description and Operation for the NVG900 transfer case, Differential Case General Description, and Differential Carrier
Assembly Description in this service manual. 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
| | Important: The constant velocity (CV) joint is not serviceable. If the boot is torn or the joint is worn or damaged, replace the propeller shaft as an assembly.
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| • | Inspect the easily accessible or visible system components for obvious damage or conditions which could cause the symptom. |
| • | Inspect the CV joint boot for rips or cracks. |
| • | Rotate the CV joint to inspect for binding. |
| • | Inspect the CV joint for grease or oil leakage. |
| • | 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:
