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DTC U0302-00: TCM Processor Error: Notes

DTC U0302:00 TCM processor error
Detection Condition 
  • When any of the following conditions is met:
    • CAN communication line malfunction between TCM and PCM
    • TCM internal malfunction

Diagnostic support note 

  • This is a continuous monitor (other).
  • The check engine light illuminates if the PCM detects the above malfunction condition during the first drive cycle.
  • FREEZE FRAME DATA/Snapshot data is available.
  • DTC is stored in the PCM memory.
Fail-Safe Function 
  • Not applicable
Possible Cause 
  • TCM connector or terminals malfunction
  • PCM connector or terminals malfunction
  • CAN communication line malfunction between PCM and TCM (local CAN between PCM and TCM)
    • TCM terminal G-PCM terminal 1A
    • TCM terminal H-PCM terminal 1B
  • TCM DTC is stored.
  • CAN drive error (TCM or PCM)
  • PCM malfunction
  • TCM malfunction
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