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Home >> Mazda >> 2021 >> CX-30 Turbo Premium >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 4 (On-Board Diagnostics - Automatic Transaxle (EV6A-El, EV6AX-El)) >> DTC U0074-00: Can System Communication Error (Local Can Between TCM And Pcm) >> Outline

DTC U0074-00: Can System Communication Error (Local Can Between TCM And Pcm): Outline

WARNING: This page is about a different variant/trim than selected.
DTC U0074:00 (TCM, EV6A-EL, EV6AX-EL, US) DETECTION CONDITION AND POSSIBLE CAUSE

System malfunction location 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
  • 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
Connector diagram
  • Not applicable