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Home >> Ford >> 2021 >> Explorer ST >> Repair and Diagnosis (Single Page) >> Engine Performance >> System >> Engine Controls - Diagnostic Methods (Hybrid) -- Ford >> Transmission Control Module (TCM) Reprogramming >> Description >> Making Changes To The TCM Calibration
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Making Changes To The TCM Calibration

If the TCM does not complete the reflash after two consecutive attempts, follow the instructions listed below:

  1. If the TCM reprogramming aborts during the procedure:
    • Reprogram the TCM again.
    • After the TCM reprogramming is successfully completed, clear the continuous DTCs in the PCM and the TCM.
  2. If the TCM reprogramming aborts immediately after the start:
    • Turn the ignition OFF.
    • Disconnect the PCM B connector, and leave it disconnected.
    • Turn the ignition ON.
    • Start the TCM reprogramming.
    • After the TCM reprogramming is successfully completed, turn the ignition OFF and connect the PCM B connector.
    • Clear any PCM and TCM DTCs that may have been stored during reprogramming.