Strategy Based Diagnostics
Review the system operations in order to familiarize yourself with
the system functions. Refer to
Transfer Case Disassembled View
and
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 problem. The diagnostic flow is the place to start when
repairs are necessary. For a detailed explanation, refer to Strategy Based
Diagnostics in General Information.
Visual/Physical Inspection
| • | Inspect for aftermarket devices, which could affect the operation
of the vehicle. Refer to Checking Aftermarket Accessories in Wiring Systems. |
| • | 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:
