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Home >> Saturn >> 2003 >> Ion 1 Standard >> Repair and Diagnosis >> Engine Performance >> Remove, Overhaul & Install >> Removal & Installation >> Computerized Engine Controls >> Engine Control Module >> Installation
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Engine Control Module: Installation

  1. Use the retaining tab to secure the ECM when installing the ECM to the underhood junction block bracket.
  2. Connect the large ECM harness connector to the ECM. See Fig 1 .
  3. Connect the small ECM harness connector to the ECM.
  4. Connect the negative battery cable.
  5. Program the ECM. See ENGINE CONTROL MODULE REPROGRAMMING  .
Fig 1: Locating ECM Components
G00248334Courtesy of GENERAL MOTORS CORP.
Fig 2: Removing & Installing ECM
G00248335Courtesy of GENERAL MOTORS CORP.
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