Strategy Based Diagnostics
Review the system operations in order to familiarize yourself with the system
functions. Refer to
Transfer Case Disassembled View,
Transfer Case Description and Operation, and
Differential Carrier Assembly Description 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. |
| • | Check for the correct lubricant levels and the proper viscosities. |
| • | Verify the exact operating conditions under which the concern exists.
Note factors such as vehicle 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:
