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Home >> Cadillac >> 2021 >> CT5 V, 4WD >> Repair and Diagnosis >> General Information >> Reset Procedures >> Programming And Setup >> Repair Instructions >> P16 Instrument Panel Cluster Control Module: Programming and Setup >> Reprogram ECU (UDV or UHS)
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Reprogram ECU (UDV or UHS)

To program a replacement or an existing ECU, perform the following procedure:

  1. Ignition ON/Vehicle in Service Mode.
    2. NOTE:

    Ensure programming of this module is performed using the EL-52100 (MDI 2). Using the EL-47955 (MDI) will result in a programming failure.

  2. Access the Service Programming System (SPS) and follow the on-screen instructions.
  3. Ignition/Vehicle OFF.
  4. On the SPS Supported Controllers screen, select P16 Instrument Cluster - Graphics Programming and follow the on-screen instructions.
  5. On the SPS Supported Controllers screen, select P16 Instrument Cluster - Programming and follow the on-screen instructions.
    6. NOTE:

    If Ethernet programming fails, ensure Instrument Cluster is communicating over ethernet properly. Refer to Scan Tool Does Not Communicate with Vehicle

  7. Clear DTCs.
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