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Home >> Mazda >> 2021 >> CX-3 AWD >> Repair and Diagnosis >> Accessories & Equipment >> Drivers Assistance Systems - ADAS >> On-Board Diagnostic - Blind Spot Monitoring Control Module >> DTC U1A4B-43/U1A4B-44/U1A4B-45/U1A4B-46/U1A4B-47/U1A4B-48/U1A4B-49/U1A4B-96: Blind Spot Monitoring (BSM) Control Module (RH) Malfunction (Blind Spot Monitoring System) >> Notes

DTC U1A4B-43/U1A4B-44/U1A4B-45/U1A4B-46/U1A4B-47/U1A4B-48/U1A4B-49/U1A4B-96: Blind Spot Monitoring (BSM) Control Module (RH) Malfunction (Blind Spot Monitoring System): Notes

CAUTION:
  • When replacing a blind spot monitoring (BSM) control module (RH) having any of the following part numbers, it is necessary to replace the blind spot monitoring (BSM) control module (LH) at the same time to perform the configuration normally.
    • DB2R-67Y80
    • DB2R-67Y80 A
DTC U1A4B:43/U1A4B:44/U1A4B:45/U1A4B:46/U1A4B:47/U1A4B:48/U1A4B:49/U1A4B:9 6 (BLIND SPOT MONITORING SYSTEM) DETECTION CONDITION AND POSSIBLE CAUSE

Description Blind spot monitoring (BSM) control module (RH) malfunction
Detection condition
  • U1A4B:43
    • Blind spot monitoring (BSM) control module (RH) external RAM malfunction detected with the ignition switched ON (engine off or on).
  • U1A4B:44
    • Blind spot monitoring (BSM) control module (RH) internal RAM malfunction detected with the ignition switched ON (engine off or on).
  • U1A4B:45
    • Blind spot monitoring (BSM) control module (RH) ROM malfunction detected with the ignition switched ON (engine off or on).
  • U1A4B:46
    • Blind spot monitoring (BSM) control module (RH) EEPROM malfunction detected with the ignition switched ON (engine off or on).
  • U1A4B:47
    • Blind spot monitoring (BSM) control module (RH) monitoring system malfunction detected with the ignition switched ON (engine off or on).
  • U1A4B:48
    • Blind spot monitoring (BSM) control module (RH) communication circuit malfunction detected with the ignition switched ON (engine off or on).
  • U1A4B:49
    • Blind spot monitoring (BSM) control module (RH) voltage control circuit malfunction detected for 1 s or more with the ignition switched ON (engine off or on).
  • U1A4B:96
    • Blind spot monitoring (BSM) control module (RH) internal circuit malfunction detected for 1 s or more with the ignition switched ON (engine off or on).
Fail-safe
  • U1A4B:43
    • Blind spot monitoring (BSM) system is stopped.
  • U1A4B:44
    • Blind spot monitoring (BSM) system is stopped.
  • U1A4B:45
    • Blind spot monitoring (BSM) system is stopped.
  • U1A4B:46
    • Blind spot monitoring (BSM) system is stopped.
  • U1A4B:47
    • Blind spot monitoring (BSM) system is stopped.
  • U1A4B:48
    • Blind spot monitoring (BSM) system is stopped.
  • U1A4B:49
    • Blind spot monitoring (BSM) system is stopped.
  • U1A4B:96
    • Blind spot monitoring (BSM) system is stopped.
Possible cause
  • Blind spot monitoring (BSM) control module (RH) malfunction
System wiring diagram Not applicable
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