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Programming and Relearning

IMPORTANT: Anytime a replacement PCM is installed the PCM must relearn the crankshaft notches.

When a replacement PCM is installed, or crankshaft position sensor or crankshaft or engine has been replaced, follow these procedures to relearn crankshaft notches:
1. Using Scan tool select "Crankshaft Pos. Variation Learn" under special functions menu.
2. Follow instructions as given on Scan tool.

IMPORTANT: This procedure will not be initiated if any misfire is detected. If misfire DTCs are present, refer to "Misfire Diagnosis" section prior to attempting to relearn crankshaft notches.