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Home >> Mazda >> 2021 >> CX-9 Signature >> Repair and Diagnosis >> Engine Performance >> System >> On-Board Diagnostic - Engine Control System (6 Of 6) >> DTC U0074-00: Can System Communication Error (Local Can Between Pcm And TCM) >> Notes
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DTC U0074-00: Can System Communication Error (Local Can Between Pcm And TCM): Notes

DTC U0074:00 DETECTION CONDITION AND POSSIBLE CAUSE

DTC U0074:00 CAN system communication error (local CAN between PCM and TCM)
DETECTION CONDITION
  • Malfunction in CAN bus communication line.

    Diagnostic support note

  • This is a continuous monitor (other).
  • The check engine light does not illuminate.
  • FREEZE FRAME DATA is not available.
  • Snapshot data is available.
  • DTC is stored in the PCM memory.
FAIL-SAFE FUNCTION Not applicable
POSSIBLE CAUSE
  • 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.
  • PCM malfunction
  • TCM malfunction
G13697942Courtesy of MAZDA MOTORS CORP.