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Home >> Mazda >> 2024 >> 3 S >> Repair and Diagnosis >> Transmission >> Automatic Trans >> On-Board Diagnostic - Automatic Transaxle >> DTC U0140-00: Can Communication System: Communication Error To Body Control Module (BCM)

DTC U0140-00: Can Communication System: Communication Error To Body Control Module (BCM)

U0140-00: (TCM) DETECTION CONDITION AND POSSIBLE CAUSE

System malfunction location CAN communication system: Communication error to body control module (BCM)
Detection condition
  • The TCM cannot receive the signal from the body control module (BCM).
Preconditions 
  • Battery voltage: Specified value or more
Fail-safe
  • Inhibits learning control.
  • Inhibits neutral idle control.
  • Cancel the i-stop control.
Possible cause
  1. CAN communication line malfunction between TCM and body control module (BCM)
    NOTE:
  2. Control valve body malfunction (TCM malfunction) (Refer to CONTROL VALVE BODY REMOVAL/INSTALLATION [EV6A-EL, EV6AX-EL] , or CONTROL VALVE BODY REMOVAL/INSTALLATION [GW6AX-EL] in service information.)
Repeatability verification procedure
  • Not applicable
System wiring diagram
  • Not applicable