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Home >> Toyota >> 2021 >> Corolla LE >> Repair and Diagnosis >> External Pages >> Different car >> Section 200 (Occupant Classification System - Diagnostic Codes & Symptom Tests (Model Code: ZRE172)) >> Occupant Classification System >> DTC B1771: Passenger Side Buckle Switch Circuit Malfunction [08/2013 - 08/2016] >> Description
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DTC B1771: Passenger Side Buckle Switch Circuit Malfunction [08/2013 - 08/2016]: Description

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

DTC B1771 is stored when a malfunction is detected in the 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 passenger side buckle switch circuit.
  • Passenger side buckle switch malfunction
  • Occupant detection ECU malfunction
  • Front seat wire RH
  • Passenger side buckle switch (Front seat inner belt assembly RH)
  • Occupant detection ECU