Diagnosis And Testing - MDS Solenoid
WARNING: This page is about a different car, the 2013 RAM 3500 HD and 2013 RAM 2500 HD. However, it is still accessible from the selected car via links, so may be relevant.
The Multi-Displacement System (MDS) has the following detectable issues:
- solenoid circuit
- fail to deactivate a cylinder(s)
- fail to reactivate a cylinder(s)
- low oil pressure
| CONDITION | POSSIBLE CAUSES | CORRECTION |
|---|---|---|
| MDS does not activate | 1. Low oil pressure. | 1. Check for proper oil pressure. |
| 2. Bad oil temperature sensor. | 2. Replace the oil temperature sensor. | |
| 3. Malfunctioning MDS solenoid. | 3. Replace the solenoid. | |
| 4. Malfunctioning MDS tappet. | 4. Replace tappet (s). | |
| MDS does not deactivate | 1. Low oil pressure. | 1. Check or proper oil pressure. |
| 2. Bad oil temperature sensor. | 2. Replace the oil temp sensor. | |
| 3. Malfunctioning MDS solenoid. | 3. Replace the solenoid. | |
| 4. Malfunctioning MDS tappet. | 4. Replace tappet(s). |