Symptoms - Transfer Case

Symptoms - Transfer Case

Important: Perform the Transfer Case Diagnostic System Check before using the Symptom Tables in order to verify that all of the following are true:
^ There are no DTCs set.
^ The control module(s) can communicate via the serial data link.
^ Review the system operation in order to familiarize yourself with the system functions.

Visual/Physical Inspection
^ Inspect for aftermarket devices which could affect the operation of the automatic transfer case system.
^ 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.

Symptom List
Refer to a symptom diagnostic procedure from the following list in order to diagnose the symptom:

^ Service Indicator Always On
Service Indicator Always on

^ Service Indicator Inoperative
Service Indicator Inoperative

Service Indicator Always On
Test Description
The numbers below refer to the step numbers on the diagnostic table.
2. Determines whether the failure is the result of a faulty transfer case shift control module or the instrument cluster.