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Home >> Saturn >> 2007 >> Ion 2 4D Sedan, Standard >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls And Fuel - 2.2L - Introduction (2 Of 2) >> Repair Instructions >> Engine Control Module Replacement >> Removal Procedure
July 1: So it begins. Don't worry, this is not in the correct legal jurisdiction!

Removal Procedure

  1. Using a scan tool, retrieve the percentage of remaining engine oil. Record the remaining engine oil life.
  2. Disconnect the negative battery cable. Refer to Battery Negative Cable Disconnection and Connection in Engine Electrical.
    3. Fig 1: View Of Engine Electrical Center
    GM873343Courtesy of GENERAL MOTORS CORP.
  3. Disconnect the small engine control module (ECM) harness connector (3) from the ECM.
  4. Remove the bolt retaining the large ECM connector to the ECM.
  5. Disconnect the large ECM harness connector (4) from the ECM.
    6. Fig 2: View Of ECM
    GM857196Courtesy of GENERAL MOTORS CORP.
    NOTE: Control module damage may result when the metal case contacts battery voltage. DO NOT contact the control module metal case with battery voltage when servicing a control module, using battery booster cables or when charging the vehicles battery.
  6. Use the retaining tab to release the ECM from the underhood junction block bracket.
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