Warning Signs the Differential Control Module is Failing:
- The vehicle may have trouble shifting between drive modes (like 2WD and 4WD).
- The service light or AWD warning light might come on.
- You might hear strange noises from the rear differential.
- The vehicle could experience reduced traction or poor handling, especially in slippery conditions.
- The differential might lock up or not engage properly.
How to Test if this part is the problem:
- Get the error codes read by a mechanic or auto parts store. This will tell you if the differential control module is reporting a problem.
- Check the wiring and connections to the module. Make sure they are clean and tight.
- A mechanic can use a scan tool to monitor the module's performance and see if it is sending the correct signals.
- Sometimes, swapping the module with a known good one (if available) can help diagnose the problem.
Common Failure Causes:
- Water or dirt getting into the module.
- Electrical problems, like shorts or loose connections.
- Normal wear and tear over time.
- Damage from accidents or impacts.
- Corrosion of the module's internal components.
