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Home >> Mazda >> 2020 >> CX-3 AWD >> Repair and Diagnosis >> Transmission >> Automatic Trans >> On-Board Diagnostics - Transaxle >> DTC U0074-00: Can System Communication Error (Local Can Between TCM And Pcm) (TCM) >> Notes
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DTC U0074-00: Can System Communication Error (Local Can Between TCM And Pcm) (TCM): Notes

DTC U0074:00 (TCM) DETECTION CONDITION AND POSSIBLE CAUSE

DTC U0074:00 CAN system communication error (local CAN between TCM and PCM)
DETECTION CONDITION  
  • Under the following condition, a communication error (local CAN between TCM and PCM) occurs:
    • Battery voltage is 10 V or more.
FAIL-SAFE FUNCTION  
  • Set to TCC control.
  • Inhibits learning control.
  • Inhibits manual mode.
  • Inhibits neutral idle control.
  • Inhibits AAS.
  • Inhibits 5GR and 6GR.
  • Inhibits shift down when the accelerator pedal is depressed.
POSSIBLE CAUSE  
  • CAN communication line malfunction between TCM and PCM (local CAN between TCM and PCM)
  • PCM DTC is stored.
  • TCM malfunction
SYSTEM WIRING DIAGRAM Not applicable