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Home >> Mazda >> 2023 >> 3 Select, 4D Hatchback >> Repair and Diagnosis (Single Page) >> Accessories & Equipment >> Collision/Avoidance >> On-Board Diagnostic - Adaptive Led Headlights Control Module >> DTC U0122-87: Communication Error With DSC HU/Control Module [Adaptive Led Headlights Control Module] >> With Mazda M Hybrid Outline >> Outline
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DTC U0122:87 (ADAPTIVE LED HEADLIGHTS CONTROL MODULE) DETECTION CONDITION AND POSSIBLE CAUSE

System malfunction location Communication error with electronically controlled brake unit
Detection condition
  • The adaptive LED headlights control module cannot receive CAN signal from the electronically controlled brake unit.
Fail-safe
  • Perform the following controls with the adaptive LED headlights turned on.
    • Turn off glare-free high beam.
    • Set wide-range low beam as basic light distribution.
  • Control of the headlight auto leveling system is continued.
Possible cause
  • Malfunction in CAN communication line between electronically controlled brake unit and adaptive LED headlights control module
System wiring diagram Not applicable