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Home >> Mazda >> 2021 >> 6 Signature >> Repair and Diagnosis >> Accessories & Equipment >> Headlights >> On-Board Diagnostic - Adaptive Front Lighting System Control Module >> DTC B1D00-13: Headlight (LH) Circuit Malfunction [Adaptive Front Lighting System (AFS) Control Module] >> Notes

DTC B1D00-13: Headlight (LH) Circuit Malfunction [Adaptive Front Lighting System (AFS) Control Module]: Notes

DTC B1D00:13 [ADAPTIVE FRONT LIGHTING SYSTEM (AFS) CONTROL MODULE] DETECTION CONDITION AND POSSIBLE CAUSE

Description Headlight (LH) circuit malfunction
Detection condition
  • The AFS control module detected an open circuit in the headlight (LH) circuit during the headlight LO on control for 5 s or more with the ignition switched ON (engine off or on).
Fail-safe
  • Control of the AFS is continued.
  • Control of the headlight auto leveling system is continued.
Possible cause
  • DTCs are stored in the front body control module (FBCM).
  • Headlight LO (LH) circuit malfunction
  • Front combination light (LH) connector or terminal malfunction
  • AFS control module connector or terminal malfunction
  • Short to ground in wiring harness between AFS control module terminal L and front combination light (LH) terminal N
  • Open circuit in wiring harness between AFS control module terminal L and front combination light (LH) terminal N
  • Front combination light (LH) malfunction
  • AFS control module malfunction
G13726001Courtesy of MAZDA MOTORS CORP.