Strategy Based Diagnostics
Review the system operations in order to familiarize yourself with the system
functions. Refer to Driveline Disassembled View, Propeller Shaft General Description,
Transfer Case General Description, 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 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 Aftermarket Accessories procedure in the Body Electrical
service manual. |
| • | 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:
| • | Ping, Snap, or Click Noise |
| • | Shudder on Acceleration at Low Speed |
