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Home >> Lexus >> 2017 >> RC 200t Base >> Repair and Diagnosis (Single Page) >> Restraints >> Air Bag, SRS >> Occupant Classification System - Diagnostic Codes & Symptom Tests >> Occupant Classification System >> DTC B1790: Center Airbag Sensor Assembly Communication Circuit Malfunction [09/2014 - 09/2020] >> Description

DTC B1790: Center Airbag Sensor Assembly Communication Circuit Malfunction [09/2014 - 09/2020]: Description

The center airbag sensor assembly communication circuit consists of the occupant detection ECU and airbag ECU assembly.

DTC B1790 is stored when a malfunction is detected in the center airbag sensor assembly communication circuit.

DTC No. Detection Item DTC Detection Condition Trouble Area
B1790 Center Airbag Sensor Assembly Communication Circuit Malfunction
  • The occupant detection ECU detects a line short, short to ground or B+, or an open in the center airbag sensor assembly communication circuit.
  • Occupant detection ECU malfunction
  • Airbag ECU assembly malfunction
  • Floor wire
  • Front seat wire RH
  • Occupant detection ECU
  • Airbag ECU assembly