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Home >> Mazda >> 2019 >> CX-9 Signature >> Repair and Diagnosis (Single Page) >> Accessories & Equipment >> Communication Devices >> On-Board Diagnostic - Front Body Control Module (FBCM) >> DTC B134D-02: Headlight Control Signal Error [Front Body Control Module (FBCM)] >> Notes
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DTC B134D-02: Headlight Control Signal Error [Front Body Control Module (FBCM)]: 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 the start stop 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 lights) are 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