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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 B10A6-64: Light Switch Error Signal Received >> Notes
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DTC B10A6-64: Light Switch Error Signal Received: Notes

DTC B10A6:64 (FRONT BODY CONTROL MODULE (FBCM)) DETECTION CONDITION AND POSSIBLE CAUSE

Description Light Switch Error Signal Received
Detection condition
  • Front body control module (FBCM) receives the error signals from unit for 5 s or more with the ignition switched ON (engine off or on)
Fail-safe
  • If DTC B10A6:64 is detected when the ignition is switched ON (engine off or on), the headlight LO and the TNS (parking lights) are illuminated.
  • If DTC B10A6:64 is cleared, the headlight LO and the TNS (parking turned off, and the operation returns to normal.
Possible cause
  • Start stop unit malfunction
  • Light switch malfunction
  • Front body control module (FBCM) malfunction
System wiring diagram Not applicable