ECM Replacement

If the engine control module (ECM) is replaced, the following procedures must be performed:

1. ECM Reprogramming-Refer to Service Programming System (SPS) .
2. The CKP System Variation Learn-Refer to Crankshaft Position System Variation Learn for the 3.5L engine or Crankshaft Position System Variation Learn for the 3.9L engine.
3. The Throttle/Idle Learn procedure-Refer to Throttle/Idle Learn for the 3.5L or Throttle/Idle Learn for the 3.9L
4. Fuel Composition Diagnosis-Refer to Fuel Composition Diagnosis for the 3.5L (LZE) engine or Fuel Composition Diagnosis for the 3.9L (LGD) engine.
5. Engine Oil Life Remaining-When available, use a scan tool to reset the Engine Oil Life Remaining back to the original percentage recorded before the module was replaced.
6. Transmission Fluid Life Remaining-When available, use the scan tool to reset the Transmission Fluid Life Remaining back to the original percentage recorded before the module was replaced.
7. Theft Deterrent-Refer to Immobilizer System Component Programming .