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Home >> Jeep >> 2021 >> Grand Cherokee Trackhawk >> Repair and Diagnosis >> Body & Frame >> Seats >> (Memory Seat Module Driver (MSMD) - Electrical Diagnostics) >> DTC Troubleshooting >> B221C-42-(MSM) Memory Seat Module Internal-General Memory Failure >> Diagnostic Test

Diagnostic Test

CHECK FOR AN ACTIVE DTC 

  1. With the scan tool, read DTCs and record on the repair order.
  2. Record the Environmental Data.
  3. With the scan tool, erase DTCs.
  4. Using the recorded Environmental Data, along with the When Monitored and Set Conditions above, operate the vehicle in the conditions that set the DTC.
  5. With the scan tool, read MSMD DTCs.

    Is the same DTC active?

    Yes 

    • Attempt to update (flash) the Memory Seat Module-Driver (MSMD). If you are unable to update the controller, or if this DTC continues to reset after updating, replace and program the MSMD in accordance with the Service Information. Refer to MODULE, MEMORY, SEAT (MSM), REMOVAL .
    • Perform POWER SEAT SYSTEM VERIFICATION TEST. Refer to POWER SEAT SYSTEM VERIFICATION TEST  .

    No