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Home >> Chevrolet >> 2004 >> Optra Base, Automatic >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - 1.8L (L79) - 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 system variation learning procedure. Refer to Crankshaft Position System Variation Learn .
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