Important: Perform the
Diagnostic System Check - Vehicle
in Vehicle DTC Information before using
the Symptom Tables in order to verify that all of the following are true:
| • | There are no diagnostic trouble codes (DTCs) set. |
| • | The control module or modules can communicate via the serial data link. |
Visual/Physical Inspection
| • | Inspect for aftermarket devices which could affect the operation of the
automatic transfer case (ATC) 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 ATC 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:
