Displacement On Demand (DOD) System Diagnosis

Displacement on Demand (DoD) System Diagnosis
1. Check the engine oil level. Fill as required.
2. Using the scan tool, check for diagnostic codes within the engine control module (ECM). Refer to Diagnostic System Check - Vehicle. Repair as required. Diagnostic System Check - Vehicle
3. Verify proper engine oil pressure and operation of the Displacement-on-Demand (DoD) oil pressure regulator valve.
4. Verify proper operation of the DoD system components.
5. Remove the valve lifter oil manifold (VLOM).
6. Verify proper operation of the VLOM.
7. Replace the DoD valve lifters as required. Both intake and exhaust lifters should be replaced in pairs.