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
Differential Carrier Assembly Description in Rear Drive Axle section of 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 Diagnostics in the General Information section of this service manual.
Visual/Physical Inspection
| • | Inspect for aftermarket devices which could affect the operation of the
vehicle. Refer to Checking After Market Accessories procedure in the Body Removal
and Installation service manual. |
| • | Inspect 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:
| • | Diagnostic Starting Point-Transfer Case |
| • | Diagnostic Starting Point-Rear Drive Axle in Rear Drive Axle |
| • | Noisy on Turns in Rear Drive Axle |
