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Home › Isuzu › 2005 › Ascender Limited, RWD › Repair and Diagnosis › Transmission › Automatic Trans › Automatic Transmission - Repair Instructions › Repair Instructions › Transmission Control Module (TCM) Replacement › Installation Procedure

Installation Procedure

  1. If the ECM/TCM bracket (1) was previously removed, install the ECM/TCM bracket (1) to the vehicle frame.
    2. Fig 1: ECM/TCM Bracket Retaining Bolt
    GM1521466Courtesy of GENERAL MOTORS CORP.
  2. Install the ECM/TCM bracket retaining bolts (2).
    3. NOTE: Refer to Fastener Notice in Cautions and Notices.
  3. Tighten the ECM/TCM bracket bolts.

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

    4. Fig 2: ECM/TCM Bracket
    GM1521468Courtesy of GENERAL MOTORS CORP.
  4. If the ECM was previously removed from the ECM/TCM bracket (2), install the ECM (3). Refer to Engine Control Module (ECM) Replacement in Engine Controls - 5.3L.
    5. Fig 3: ECM/TCM Bracket
    GM1521496Courtesy of GENERAL MOTORS CORP.
  5. Insert the TCM (1) into the retaining slot of the ECM/TCM bracket (2).
    6. Fig 4: ECM/TCM Bracket
    GM1521482Courtesy of GENERAL MOTORS CORP.
  6. Secure the TCM (2) to the ECM/TCM mounting bracket ensuring the TCM retaining tab (1) is fully engaged.
    7. Fig 5: ECM/TCM Connectors
    GM1521481Courtesy of GENERAL MOTORS CORP.
  7. Connect the ECM electrical connector (1) to the TCM (2) if previously removed.
    8. Fig 6: ECM/TCM Cover & Bracket
    GM1521469Courtesy of GENERAL MOTORS CORP.
  8. Install the ECM/TCM cover (2) to the ECM/TCM bracket (1).
  9. Ensure the ECM/TCM cover retainers (2) are fully engaged with the ECM/TCM bracket (1).
  10. Connect the cooling fan electrical connector.
  11. Connect the negative battery cable. Refer to Battery Negative Cable Disconnect/Connect Procedure in Engine Electrical.
  12. If the TCM was replaced the replacement TCM must be programmed. Refer to Transmission Control Module Programming and Setup in Programming and Setup.
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