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Home >> Cadillac >> 2004 >> CTS Base, 3.6 7 >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - 3.6L - Introduction >> Repair Instructions >> Engine Control Module (ECM) Replacement >> Installation Procedure
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Installation Procedure

    Fig 1: Installing 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 bracket bolt (2) to 10 N.m (89 lb in).
    2. Tighten the ECM bracket bolts (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 wire harness retainer 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 electrical connector bracket bolt to 10 N.m (89 lb in).

    5. Fig 4: Installing Wiring Harness Ground Wire And Bolt To ECM Bracket
    GM1343434Courtesy of GENERAL MOTORS CORP.
  5. Install the wiring harness ground wire and bolt to the ECM bracket.

    Tighten:  Tighten the wiring harness ground wire bolt 10 N.m (89 lb in).

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

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

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

    Tighten:  Tighten the ECM redundant ground wire 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 Service Programming System (SPS) in Programming.
  16. Turn OFF the ignition for at least 5 seconds after the programming event is complete.
  17. Perform the idle learn procedure. Refer to Idle Learn Procedure .
  18. Use the scan tool to clear all DTCs.
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