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Home >> Mazda >> 2024 >> CX-30 Premium >> Repair and Diagnosis >> Accessories & Equipment >> Headlights >> On-Board Diagnostic - Adaptive Front Lighting System Control Module >> DTC B1437-87: Communication Error With Front Combination Light (LH)[Adaptive Front Lighting System (AFS) Control Module]
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DTC B1437-87: Communication Error With Front Combination Light (LH)[Adaptive Front Lighting System (AFS) Control Module]

B1437: 87 (ALH/AFS/ALV) DETECTION CONDITION AND POSSIBLE CAUSE

System malfunction location Communication error with front combination light (LH)
Detection condition
  • The adaptive LED headlights control module detected communication error with the front combination light (LH).
Fail-safe
  • The headlight leveling actuator is stopped at the position when the malfunction is determined.
Possible cause
  1. Front combination light (LH) malfunction (Refer to applicable FRONT COMBINATION LIGHT REMOVAL/INSTALLATION in the service information.)
  2. Adaptive LED headlights control module malfunction (Refer to applicable ADAPTIVE FRONT LIGHTING SYSTEM (AFS) CONTROL MODULE REMOVAL/INSTALLATION in the service information.)
Repeatability verification procedure
  1. Clear the DTC recorded in the memory. (see CLEARING DTC .)
System wiring diagram
  • Not applicable