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DTC B1780: Front Occupant Classification Sensor LH Circuit Malfunction: Description

The front occupant classification sensor LH circuit consists of the occupant classification ECU and the front occupant classification sensor LH.

DTC B1780 is recorded when a malfunction is detected in the front occupant classification sensor LH circuit.

DTC No. DTC Detecting Condition Trouble Area
B1780
  • Occupant classification ECU detects line short circuit signal, open circuit signal, short circuit to ground signal or short circuit to B+ signal in the front occupant classification sensor LH circuit for 2 seconds
  • Front occupant classification sensor LH malfunction
  • Occupant classification ECU malfunction
  • No. 1 seat wire
  • Front seat assembly RH (Front occupant classification sensor LH)
  • Occupant classification ECU