DTC U2300-56: Configuration Data Of Body Control Module (BCM) Is Invalid [Connectivity Master 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 U2300:56 (CONNECTIVITY MASTER UNIT) DETECTION CONDITION AND POSSIBLE CAUSE

System malfunction location	Configuration data of body control module (BCM) is invalid
Detection condition	The connectivity master unit (CMU) received invalid configuration data from the body control module (BCM) for 1 s.
Fail-safe	Not applicable
Possible cause	Inappropriate connectivity master unit (CMU) replacement procedure Configuration data of body control module (BCM) and connectivity master unit (CMU) not matched Body control module (BCM) configuration data write error The connectivity master unit (CMU) configuration after replacement is not implemented. Connectivity master unit (CMU) malfunction Body control module (BCM) malfunction
System wiring diagram	Not applicable
Connector diagram	Not applicable