DTC U0300-51: Internal Control Module Software Incompatibility [DSC HU/Cm]: Outline

WARNING: This page is about a different car, the 2021 Mazda 3. However, it is still accessible from the selected car via links, so may be relevant.

DTC U0300:51 (DSC HU/CM) DETECTION CONDITION AND POSSIBLE CAUSE

System malfunction location	Internal control module software incompatibility
Detection condition	The DSC HU/CM detects that software incompatible with the hardware specification was written
Fail-safe	Refer to "DTC Table" and "Fail-safe Function Malfunction Contents Table". (See DTC TABLE [DSC HU/CM (US)] .)
Possible cause	Writing of software incompatible with hardware specification for DSC HU/CM implemented DSC HU/CM internal malfunction
System wiring diagram	Not applicable
Connector diagram	Not applicable