DTC B2009-92: Communication Error With Body Control Module (BCM), Dash-Electrical Supply Unit Or Pcm [Dash-Electrical Supply Unit]: Outline

WARNING: This page is about a different car, the 2020 Mazda CX-30. However, it is still accessible from the selected car via links, so may be relevant.

DTC B2009:92 [DASH-ELECTRICAL SUPPLY UNIT] DETECTION CONDITION AND POSSIBLE CAUSE

System malfunction location	Communication error with body control module (BCM), dash-electrical supply unit or PCM
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 PCM.
Fail-safe	Not applicable
Possible cause	Malfunction in CAN communication line between body control module (BCM) and climate control unit Malfunction in CAN communication line between dash-electrical supply unit and climate control unit Malfunction in CAN communication line between PCM and climate control unit
System wiring diagram	Not applicable
Connector diagram	Not applicable