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Home >> Mazda >> 2019 >> 6 Signature >> Repair and Diagnosis (Single Page) >> Accessories & Equipment >> Communication Devices >> On-Board Diagnostics - Front Body Control Module (FBCM) >> DTC B134D-02: Headlight Control Signal Error >> Notes
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DTC B134D-02: Headlight Control Signal Error: Notes

DTC B134D:02 (FRONT BODY CONTROL MODULE (FBCM)) DETECTION CONDITION AND POSSIBLE CAUSE

Description Headlight Control Signal Error
Detection condition
  • Front body control module (FBCM) receives the error signal from unit for 5 s or more with the ignition switched ON (engine off or on)
Fail-safe
  • If DTC B134D:02 is detected when the ignition is switched ON (engine off or on), the headlight LO and the TNS (parking lights) are illuminated.
  • If DTC B134D:02 is cleared, the headlight LO and the TNS (parking turned off, and the operation returns to normal.
Possible cause
  • DTCs are stored in the start stop unit.
  • Front body control module (FBCM) malfunction
System wiring diagram Not applicable