The following service procedures require either a programming or a setup event be performed for a complete repair.
Powertrain Control Module (PCM) Replacement
If the powertrain control module (PCM) is replaced, the following procedures must be performed:
- The PCM reprogramming--Refer to
Service Programming System (SPS)
.
- The Crankshaft Position (CKP) Variation Learn--Refer to
Crankshaft Position System Variation Learn
in Engine Controls - 4.2L (LL8).
PCM Reprogramming
Important: Ensure that the CKP variation learn procedure is performed after reprogramming.
| • | If the powertrain control module (PCM) requires programming, the following procedures must be performed: |
| • | 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 crankshaft position (CKP) variation learn procedure must be performed. Refer to
Crankshaft Position System Variation Learn
in Engine Controls - 4.2L (LL8).
| • | Any engine repair that disturbs the crankshaft position CKP sensor or its relationship with the crankshaft reluctor wheel |
