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. Idle Learn Procedure-Refer to Idle Learn
3. The crankshaft position (CKP) System Variation Learn Procedure- Refer to Crankshaft Position System Variation Learn
4. Theft Deterrent-Refer to Programming Theft Deterrent System Components (Tech 2) or Programming Theft Deterrent System Components (Scan 100) . The ECM will learn the incoming fuel continue password immediately upon receipt of a password message. Once a password message is received, and a password is learned, a learn procedure must be performed to change this password again. An ECM which has been previously installed in another vehicle will have learned the other vehicle's fuel continue password, and will require a learn procedure after programming to learn the current vehicle's password.