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Home >> Chevrolet >> 2004 >> Optra Base, Automatic >> Repair and Diagnosis (Single Page) >> Engine Performance >> System >> Engine Controls - 2.0L (L34 GMDAT) - Repair Instructions >> Repair Instructions >> Engine Control Module Replacement >> Installation Procedure
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Installation Procedure

    Fig 1: Identifying ECM
    GM1289499Courtesy of GENERAL MOTORS CORP.
  1. Connect the ECM connectors to the ECM.
  2. Align the ECM into the mounting base.
  3. Snap the ECM into its mounting base.
  4. Install the ECM trim locks.
  5. Connect the negative battery cable.
  6. Perform a crankshaft position (CKP) system variation learning procedure and the idle learn procedure. Refer to Crankshaft Position System Variation Learn  and Throttle/Idle Learn .
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