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Home >> Jeep >> 2021 >> Grand Cherokee Trackhawk >> Repair and Diagnosis (Single Page) >> Accessories & Equipment >> Communication Devices >> Electronic Control Modules (Service Information) >> Module, Transmission Control (TCM) >> Module Programming >> 8HP45/845RE TCM Programming Procedure >> Module Programming

Module Programming

PROGRAMMING THE TRANSMISSION CONTROL MODULE (TCM) 

NOTE:

New TCMs are supplied with generic software. When replacing a TCM, it must be programmed with vehicle specific software.

NOTE:

Failure to properly program the TCM will cause Diagnostic Trouble Codes (DTCs) to be set.

  1. The following conditions must be met during the reprogramming procedure:
    • Battery must be maintained between 10 and 16 volts. Connect a battery charger if necessary.
    • Ambient temperature must be between 0°C (32°F) 60°C (140°F).
    • Gear Selector must be in PARK.
  2. With the scan tool, download the appropriate TCM flash file to the scan tool.
  3. Turn the ignition on.
  4. Following the menu on the scan tool, program the TCM.
  5. Perform the TCM ADAPTATION procedure. Refer to the appropriate diagnostic information .
  6. Perform the TRANSMISSION VERIFICATION TEST. Refer to the appropriate diagnostic information .

    Is the Programming Procedure and TCM Adaptation Procedure complete?

    Yes 

    • Perform the TRANSMISSION VERIFICATION TEST. Refer to the appropriate diagnostic information .
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