Engine Control Module: Testing and Inspection

Engine Control Module Programming and Setup (Gasoline Engines)

The following service procedures require either a programming or a setup event performed for a complete repair.

ECM Replacement

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

* The ECM Reprogramming-Refer to Service Programming System (SPS) (Service Programming System (SPS)).
* The CKP Variation Learn-Refer to Crankshaft Position System Variation Learn (Testing and Inspection) for the V6, Crankshaft Position System Variation Learn (Testing and Inspection) for the V8, or Crankshaft Position System Variation Learn (Testing and Inspection) for the Hybrid.
* The Theft Deterrent Programming-Refer to Theft Deterrent Module Programming and Setup (Testing and Inspection).
* The Fuel Composition Diagnostic-Refer to Fuel Composition Diagnosis (Fuel Composition Diagnosis) for the 5.3L (LMG or LC9).
* The Throttle Learn procedure-Refer to Throttle/Idle Learn (Testing and Inspection) for the V6, Throttle/Idle Learn (Testing and Inspection) for the V8, or Throttle/Idle Learn (Testing and Inspection) for the Hybrid.
* 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.
* Transmission Fluid Life Remaining-When available, use a scan tool to reset the Transmission Fluid Life Remaining back to the original percentage recorded before the module was replaced.

ECM Reprogramming

Important: DO NOT reprogram a FlexFuel (E85) vehicle while the fuel composition learn function is active. If necessary, drive the vehicle until the scan tool indicates that the fuel composition learn parameter is inactive. Programming with the fuel composition learn active will result in fuel trim DTCs.


* If the ECM needs to be reprogrammed, refer to Service Programming System (SPS) (Service Programming System (SPS)).
* 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 reprogrammed.
* Transmission Fluid Life Remaining-When available, use a scan tool to reset the Transmission Fluid Life Remaining back to the original percentage recorded before the module was reprogrammed.

Setup for Component Replacement

The replacement of some components will require a setup procedure for complete repair.

If any of the following components are replaced, a CKP Variation Learn Procedure must be performed. Refer to Crankshaft Position System Variation Learn (Testing and Inspection) for the V6, Crankshaft Position System Variation Learn (Testing and Inspection) for the V8, or Crankshaft Position System Variation Learn (Testing and Inspection) for the Hybrid.

* Engine replacement
* Any engine repair that disturbs the crankshaft position (CKP) sensor or its relationship with the crankshaft reluctor wheel
* CKP sensor

If the throttle body is replaced, a Throttle Learn procedure must be performed. Refer to Throttle/Idle Learn (Testing and Inspection) for the V6, Throttle/Idle Learn (Testing and Inspection) for the V8, or Throttle/Idle Learn (Testing and Inspection) for the Hybrid.