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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 U0001-88: Unit Communication Error (HS-Can) [Adaptive Front Lighting System (AFS) Control Module] >> Outline
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DTC U0001-88: Unit Communication Error (HS-Can) [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 U0001:88 [ADAPTIVE FRONT LIGHTING SYSTEM (AFS) CONTROL MODULE] DETECTION CONDITION AND POSSIBLE CAUSE

System malfunction location Unit communication error (HS-CAN)
Detection condition
  • The adaptive front lighting system (AFS) control module detected CAN BUS communication line (HS-CAN) malfunction 10 times continuously.
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 BUS communication line
System wiring diagram Not applicable