Symptoms - Transfer Case

Symptoms - Transfer Case

Important:
1. Perform the Diagnostic System Check - Vehicle before using the Symptom Tables in order to verify that the following statements are true: Diagnostic System Check - Vehicle

^ There are no diagnostic trouble codes (DTCs) present.

^ The control module or modules can communicate via the serial data link.

2. Review the system operation in order to familiarize yourself with the system functions. Refer to Transfer Case Description and Operation.

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. Refer to Testing for Intermittent Conditions and Poor Connections in Diagnostic Aids in Diagnostic Aids. Component Tests and General Diagnostics

Symptom List

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

* Electronic Rear Differential Lock Will Not Engage
* Electronic Rear Differential Lock Will Not Disengage
* Transfer Case Shift Control Switch Inoperative
* Transfer Case Shift Control Switch Indicator Always On - Two or More
* Transfer Case Shift Control Switch Indicator Flashes, then Returns to Previous Mode
* Transfer Case Shift Control Switch Indicator Inoperative - One or More
* Service Indicator Always On
* Service Indicator Inoperative
* Transfer Case Popping Noise
* Transfer Case Whine or Rumble Noise
* Transfer Case Growl or Grinding Noise
* Transfer Case Clunk in 4HI Lock
* Transfer Case Clunk in 4LO Lock
* Transfer Case Clunk during Acceleration and Deceleration
* Transfer Case Shudder or Binding
* Transfer Case Will Not Shift
* Transfer Case Jumps Out of Gear
* Transfer Case Leak Diagnosis