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Home >> Mazda >> 2021 >> 6 Signature >> Repair and Diagnosis >> Accessories & Equipment >> Headlights >> On-Board Diagnostic - Auto Leveling Control Module >> DTC B1D01-13: Headlight (RH) Circuit Malfunction [Auto Leveling Control Module] >> Notes
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DTC B1D01-13: Headlight (RH) Circuit Malfunction [Auto Leveling Control Module]: Notes

DTC B1D01:13 [AUTO LEVELING CONTROL MODULE] DETECTION CONDITION AND POSSIBLE CAUSE

Description Headlight (RH) circuit malfunction
Detection condition
  • The auto leveling control module detected an open circuit in the headlight (RH) 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 headlight auto leveling system is continued.
Possible cause
  • DTCs are stored in the front body control module (FBCM).
    • Headlight LO relay circuit malfunction
  • Front combination light (RH) connector or terminal malfunction
  • Auto leveling control module connector or terminal malfunction
  • Short to ground in wiring harness between auto leveling control module terminal J and front combination light (RH) terminal N
  • Open circuit in wiring harness between auto leveling control module terminal J and front combination light (RH) terminal N
  • Front combination light (RH) malfunction
  • Auto leveling control module malfunction
G13723963Courtesy of MAZDA MOTORS CORP.