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Home >> Mazda >> 2020 >> 3 Base, 4D Hatchback, AWD >> Repair and Diagnosis >> Accessories & Equipment >> Headlights >> On-Board Diagnostic - Adaptive Front Lighting System Control Module >> DTC U0122-87: Communication Error With DSC HU/Cm (Adaptive Front Lighting System (AFS) Control Module (Us)) >> Outline

DTC U0122-87: Communication Error With DSC HU/Cm (Adaptive Front Lighting System (AFS) Control Module (Us)): Outline

DTC U0122:87 (ADAPTIVE FRONT LIGHTING SYSTEM (AFS) CONTROL MODULE (US)) DETECTION CONDITION AND POSSIBLE CAUSE

System malfunction location Communication error with DSC HU/CM
Detection condition
  • The adaptive front lighting system (AFS) control module cannot receive CAN signal from the DSC HU/CM.
Fail-safe
  • The swivel actuator is moved to the center.
  • The headlight leveling actuator is stopped at the position when the malfunction is determined.
Possible cause
  • Malfunction in CAN communication line between DSC HU/CM and adaptive front lighting system (AFS) control module
System wiring diagram Not applicable