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Home >> Cadillac >> 2005 >> CTS Base, 2.8 T, Automatic >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - 2.8L - Introduction >> Repair Instructions >> Engine Control Module (ECM) Replacement >> Installation Procedure
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Installation Procedure

    Fig 1: View Of ECM Bracket
    GM887861Courtesy of GENERAL MOTORS CORP.
  1. Install the ECM bracket (1).
    2. NOTE: Refer to Fastener Notice in Cautions and Notices.
  2. Install the ECM bracket bolts (2 and 3).

    Tighten: 

    1. Tighten the ECM to cylinder head bolts (2) to 10 N.m (89 lb in).
    2. Tighten the ECM to engine front cover bolt (3) to 23 N.m (17 lb ft).

    3. Fig 2: View Of Engine Wiring Harness Bracket Bolt - Side Of ECM Bracket
    GM945513Courtesy of GENERAL MOTORS CORP.
  3. Install the wire harness retainer and bolt (2) to the side of the ECM bracket.

    Tighten:  Tighten the bolt to 23 N.m (17 lb ft).

    4. Fig 3: View Of Engine Wiring Harness Bracket Bolt - Top Of ECM Bracket
    GM945521Courtesy of GENERAL MOTORS CORP.
  4. Install the electrical connector bracket and bolt to the ECM bracket.

    Tighten:  Tighten the bolt to 10 N.m (89 lb in).

    5. Fig 4: View Of ECM Redundant Ground Wire Bolt
    GM1343434Courtesy of GENERAL MOTORS CORP.
  5. Install the wiring harness ground wire and bolt (1) to the ECM bracket.

    Tighten:  Tighten the bolt 10 N.m (89 lb in).

    6. Fig 5: View Of ECM
    GM887860Courtesy of GENERAL MOTORS CORP.
    NOTE: In order to prevent any possible electrostatic discharge damage to the ECM, do not touch the connector pins.
  6. Install the ECM.
  7. Install the ECM bolts.

    Tighten:  Tighten the bolts to 10 N.m (89 lb in).

    8. Fig 6: View Of ECM Redundant Ground Wire Bolt
    GM1343434Courtesy of GENERAL MOTORS CORP.
  8. Install the ECM redundant ground and bolt (2) to the ECM.

    Tighten:  Tighten the bolt to 5 N.m (44 lb in).

    9. Fig 7: View Of ECM Wiring Harness Connector
    GM945720Courtesy of GENERAL MOTORS CORP.
  9. Install the engine side (lower) ECM connector.
    10. Fig 8: View Of Upper ECM Connector
    GM1343429Courtesy of GENERAL MOTORS CORP.
  10. Install the body side (upper) ECM connector.
  11. Install the ECM/TCM fuse in the underhood fuse block. Refer to Electrical Center Identification Views in Wiring Systems.
  12. Install the TCM/IPC fuse in the underhood fuse block. Refer to Electrical Center Identification Views in Wiring Systems.
  13. Install the ECM fuse in the underhood fuse block. Refer to Electrical Center Identification Views in Wiring Systems.
  14. Connect the battery negative cable to the battery. Refer to Battery Negative Cable Disconnect/Connect Procedure in Engine Electrical.
  15. Program the ECM. Refer to Control Module References in Computer/Integrating Systems.
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