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ECM To TDM Link Procedure

WARNING: This page is about a different car, the 2010 Chevrolet Aveo. However, it is still accessible from the selected car via links, so may be relevant.

This procedure will relearn the prerelease password and the challenge/response data between the theft deterrent module (TDM) and the engine control module (ECM) after replacing the ECM or TDM. Refer to Service Programming System (SPS) .

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