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Home >> Mazda >> 2024 >> CX-90 Turbo Select >> Repair and Diagnosis >> Electrical >> Motors, Switches, Relays >> On-Board Diagnostic - Dash-Electrical Supply Unit (2 Of 2) >> DTC B2009-92: Communication Error With Body Control Module (BCM), Dash-Electrical Supply Unit, Door-Electrical Supply Unit Or ECM (E-SKYACTIV PHEV)/Pcm (Except E-SKYACTIV PHEV)

DTC B2009-92: Communication Error With Body Control Module (BCM), Dash-Electrical Supply Unit, Door-Electrical Supply Unit Or ECM (E-SKYACTIV PHEV)/Pcm (Except E-SKYACTIV PHEV)

B2009:92 (DASH_ESU) DETECTION CONDITION AND POSSIBLE CAUSE

System malfunction location Communication error with body control module (BCM), dash-electrical supply unit, door-electrical supply unit or ECM (e-SKYACTIV PHEV)/PCM (except e-SKYACTIV PHEV)
Detection condition
  • The dash-electrical supply unit detects any of the following conditions.
    • The climate control unit cannot receive CAN signal from the body control module (BCM).
    • The climate control unit cannot receive CAN signal from the dash-electrical supply unit.
    • The climate control unit cannot receive CAN signal from the door-electrical supply unit.
    • The climate control unit cannot receive CAN signal from the ECM (e-SKYACTIV PHEV)/PCM (except e-SKYACTIV PHEV).
Fail-safe
  • Not applicable
Possible cause
  1. Malfunction in CAN communication line between body control module (BCM) and climate control unit
    NOTE:
  2. Malfunction in CAN communication line between dash-electrical supply unit and climate control unit
    NOTE:
  3. Malfunction in CAN communication line between door-electrical supply unit and climate control unit
    NOTE:
  4. Malfunction in CAN communication line between ECM (e-SKYACTIV PHEV)/PCM (except e-SKYACTIV PHEV) and climate control unit
    NOTE:
Repeatability verification procedure
  • Not applicable
System wiring diagram
  • Not applicable