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DTC 1 - TCCM Internal Fault

  1. Turn ignition switch on and off 5 times, waiting 5 seconds between each cycle. Recheck DTCs. If DTC 1 is present, go to next step. If no DTC does not return, problem is intermittent.
  2. Check circuit 1640 (Orange wire) between fuse panel and TCCM for open. If open circuit was found and repaired, recheck for DTC. If open circuit was not found, replace TCCM and recheck for DTC.
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