LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Mazda >> 2021 >> 6 Signature >> Repair and Diagnosis (Single Page) >> Accessories & Equipment >> Communication Devices >> On-Board Diagnostic - Rear Body Control Module (RBCM) >> DTC U0447-86: Communication Error Between Front Body Control Module (FBCM) And Instrument Cluster (RBCM) >> Notes
April 5, 2026: LEMON Manuals is launched! Read the announcement.

DTC U0447-86: Communication Error Between Front Body Control Module (FBCM) And Instrument Cluster (RBCM): Notes

DTC U0447:86 (RBCM) DETECTION CONDITION AND POSSIBLE CAUSE

Description Communication error between front body control module (FBCM) and instrument cluster
Detection condition
  • Rear body control module (RBCM) receives the error signals from the instrument cluster for 10 times continuously with the ignition switched ON (engine off or on).
Fail-safe Not applicable
Possible cause
  • DTCs are stored in the instrument cluster.
  • Instrument cluster malfunction
  • Rear body control module (RBCM) malfunction
System wiring diagram Not applicable