Symptoms - Transfer Case

Symptoms - Transfer Case

Important:
* Perform the Diagnostic System Check - Vehicle Diagnostic System Check - Vehicle before using the symptom tables in order to verify the following statements are true:


- There are no diagnostic trouble codes (DTCs) set.

- The control modules 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 and Operation MP 3010 (NP0) - Transfer Case.


Visual/Physical Inspection

* Inspect for aftermarket devices which could affect the operation of the automatic transfer case system. Refer to Checking Aftermarket Accessories Checking Aftermarket Accessories.
* 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 cause intermittent conditions. Refer to Testing for Intermittent Conditions and Poor Connections Testing for Intermittent Conditions and Poor Connections.

Symptom List

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

* Front Axle Will Not Engage Front Axle Will Not Engage
* Front Axle Will Not Disengage Front Axle Will Not Disengage
* Transfer Case Shift Control Switch Inoperative Transfer Case Shift Control Switch Inoperative
* No Correction for Slip in All-Wheel Drive Mode No Correction for Slip in All-Wheel Drive Mode
* Transfer Case Shift Control Switch Indicator Always On - Two or More Transfer Case Shift Control Switch Indicator Always On - Two or More
* Transfer Case Shift Control Switch Indicator Inoperative - One or More Transfer Case Shift Control Switch Indicator Inoperative - One or More
* Service Indicator Always On Service Indicator Always On
* Transfer Case Popping Noise Transfer Case Popping Noise
* Transfer Case Whine or Rumble Noise Transfer Case Whine or Rumble Noise
* Transfer Case Growl or Grinding Noise Transfer Case Growl or Grinding Noise
* Transfer Case Grating Noise Transfer Case Grating Noise
* Transfer Case Clunk in 2HI Only Transfer Case Clunk in 2HI Only
* Transfer Case Clunk in 4HI Transfer Case Clunk in 4HI
* Transfer Case Clunk During Acceleration and Deceleration Transfer Case Clunk During Acceleration and Deceleration
* Transfer Case Shudder or Binding Transfer Case Shudder or Binding
* Transfer Case Leak Diagnosis Transfer Case Leak Diagnosis