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Home >> Saturn >> 2004 >> Ion 1 Automatic >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls (Introduction) >> Repair Instructions >> Engine Control Module (ECM) Replacement >> Installation Procedure
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Installation Procedure

  1. Use the retaining tab to secure the ECM, when installing the ECM to the underhood junction block bracket.
    2. Fig 1: View Of ECM
    GM857196Courtesy of GENERAL MOTORS CORP.
    NOTE: Refer to Fastener Notice in Cautions and Notices.
  2. Connect the large ECM harness connector (4) to the ECM.

    Tighten:  Tighten the bolt to 4 N.m (35 lb in).

  3. Connect the small ECM harness connector (3) to the ECM.
    4. Fig 2: View Of Engine Electrical Center
    GM873343Courtesy of GENERAL MOTORS CORP.
  4. Connect the negative Battery Cable. Refer to Battery Negative Cable Disconnect/Connect Procedure in Engine Electrical.
  5. Program the ECM. Refer to Service Programming System (SPS) in Programming.
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