Symptoms

SYMPTOMS - TRANSFER CASE

IMPORTANT:
1. Perform the Transfer Case Diagnostic System Check before using the Symptom Tables in order to verify that the following statements are true:
- DTCs are not set.
- The control modules can communicate via the serial data link. Diagnostic System Check
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.

Symptom List
Refer to a symptom diagnostic procedure from the following list in order to diagnose the symptom:
- Electronic Rear Differential Lock Will Nor 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