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DTC B1771: Passenger Side Buckle Switch Circuit Malfunction [10/2021 - 11/2023]: Description

The front passenger side buckle switch circuit consists of the occupant detection ECU and front passenger side buckle switch (front seat inner belt assembly RH).

DTC B1771 is stored when a malfunction is detected in the front passenger side buckle switch circuit.

DTC No. Detection Item DTC Detection Condition Trouble Area
B1771 Passenger Side Buckle Switch Circuit Malfunction
  • The occupant detection ECU detects a line short, short to ground or B+, or an open in the front passenger side buckle switch circuit.
  • Front passenger side buckle switch malfunction
  • Occupant detection ECU malfunction
  • Front seat wire RH
  • Front passenger side buckle switch (Front seat inner belt assembly RH)
  • Occupant detection ECU
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