Initial Inspection and Diagnostic Overview

Four-Wheel Drive Systems

Overview

The DD295 transfer case is a permanent four-wheel-d rive unit, with 50/50 torque distribution to the front and rear driveshafts and is identical for all engine derivatives. For additional information, Four-Wheel Drive Systems

Inspection and Verification

1. Verify the customer concern.
2. Confirm which, if any, warning lights and/or messages were displayed on the instrument cluster. For a list of messages, Information and Message Center
3. Visually inspect for obvious mechanical or electrical faults.





4. If an obvious cause for an observed or reported concern is found, correct the cause (if possible) before proceeding to the next step.
5. Use the approved diagnostic system or a scan tool to retrieve any DTCs before moving onto the symptom chart or DTC index.
^ Make sure that all DTCs are cleared following rectification.