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DTC U0101: Notes

DTC U0101 [AJ] DETECTION CONDITION AND POSSIBLE CAUSES

DTC U0101 PCM cannot receive any signals from TCM
DETECTION CONDITION 
  • PCM cannot receive any signals from TCM.

Diagnostic support note 

  • This is a continuous monitor (CCM).
  • The MIL illuminates if the PCM detects the above malfunction condition in the first drive cycle.
  • PENDING CODE is available if the PCM detects the above malfunction condition.
  • DTC is stored in the PCM memory.
POSSIBLE CAUSE 
  • Short to ground circuit between TCM terminal 2J and PCM terminal 66
  • Short to ground circuit between TCM terminal 2M and PCM terminal 92
  • Open circuit between TCM terminal 2J and PCM terminal 66
  • Open circuit between TCM terminal 2M and PCM terminal 92
  • Short to power circuit between TCM terminal 2J and PCM terminal 66
  • Short to power circuit between TCM terminal 2M and PCM terminal 92
  • Damaged TCM
  • Damaged PCM