FixVault

DTC B10A6-64: Light Switch Error Signal Received [Front Body Control Module (FBCM)]: 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 the start stop 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 lights) are 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