DTC B13D3-51: Unregistered Remote Transmitter Is Detected (BCM): 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 B13D3:51 (BCM) DETECTION CONDITION AND POSSIBLE CAUSE

System malfunction location	Unregistered remote transmitter is detected
Detection condition	The LF control unit detects that the remote transmitter has not been programmed, when the push button start system performs authorization of the remote transmitter.
Fail-safe	Not applicable
Possible cause	Remote transmitter malfunction The remote transmitter is not programmed after replacing the LF control unit. Unprogrammed remote transmitter was used. Push button start malfunction LF control unit malfunction Body control module (BCM) malfunction
System wiring diagram	Not applicable
Connector diagram	Not applicable