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Home >> Mazda >> 2022 >> 3 Select, 4D Sedan >> Repair and Diagnosis >> External Pages >> Different car >> Section 79 (On-Board Diagnostic - Adaptive Front Lighting System Control Module) >> DTC U212A-87: Communication Error With Light Control Module (LH) [Adaptive Front Lighting System (AFS) Control Module] >> Outline
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DTC U212A-87: Communication Error With Light Control Module (LH) [Adaptive Front Lighting System (AFS) Control Module]: Outline

WARNING: This page is about a different car, the 2021 Mazda 3. However, it is still accessible from the selected car via links, so may be relevant.
DTC U212A:87 [ADAPTIVE FRONT LIGHTING SYSTEM (AFS) CONTROL MODULE] DETECTION CONDITION AND POSSIBLE CAUSE

System malfunction location Communication error with light control module (LH)
Detection condition
  • The adaptive front lighting system (AFS) control module cannot receive CAN signal from the light control module (LH).
Fail-safe
  • Control of the adaptive front lighting system (AFS) is continued.
  • Control of the headlight auto leveling system is continued.
Possible cause
  • Malfunction in CAN communication line between light control module (LH) and adaptive front lighting system (AFS) control module
System wiring diagram Not applicable