Important: Perform the Transfer Case Diagnostic System Check before using the Symptom
Tables in order to verify that all of the following are true:
| • | The control module(s) can communicate via the serial data link. |
| • | Review the system operation in order to familiarize yourself with
the system functions. Refer to
Transfer Case Description
for System Operation. |
Visual/Physical Inspection
| • | Inspect for aftermarket devices which could affect the operation
of the automatic transfer case system. 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. |
| • | Inspect the automatic transfer case for the proper fluid level. |
Intermittent
Faulty electrical connections or wiring may be the cause of intermittent
conditions. Refer to
Testing for Intermittent Conditions and Poor Connections
in Wiring Systems.
Symptom List
Refer to a symptom diagnostic procedure from the following list in order
to diagnose the symptom:
