DTC U0443-00: Error Signal Received From Rear Body Control Module (RBCM): Notes

WARNING: This page is about a different car, the 2018 Mazda 6. However, it is still accessible from the selected car via links, so may be relevant.

DTC U0443:00 RADAR UNIT DETECTION CONDITION AND POSSIBLE CAUSE

Description	Error Signal Received From Rear Body Control Module (RBCM)
Detection condition	Communication error between rear body control module (RBCM) and radar unit
Fail-safe	Inhibits the Mazda radar cruise control (MRCC) system control Inhibits the smart brake support (SBS) system control
Possible cause	DTCs are stored in the rear body control module (RBCM). Rear body control module (RBCM) malfunction DTCs are stored in the instrument cluster. Instrument cluster malfunction Radar unit malfunction
System wiring diagram	Not applicable