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Home >> Lexus >> 2021 >> LC 500 2D Coupe >> Repair and Diagnosis >> Restraints >> Air Bag, SRS >> Airbag System - Diagnostic Codes (Coupe) (2 Of 5) >> Airbag System >> DTC B163A/3A: Side Airbag Sensor Assembly No. 2 (LH) [03/2017 - 04/2020] >> Description

DTC B163A/3A: Side Airbag Sensor Assembly No. 2 (LH) [03/2017 - 04/2020]: Description

The side collision sensor LH circuit consists of the airbag ECU assembly, door side airbag sensor LH, side airbag sensor assembly LH and rear airbag sensor LH.

The door side airbag sensor LH, side airbag sensor assembly LH and rear airbag sensor LH detect impacts to the vehicle and send signals to the airbag ECU assembly to determine if the airbags and pretensioners should be deployed.

DTC B163A/3A is stored when a malfunction is detected in the side airbag sensor assembly LH.

DTC No. Detection Item DTC Detection Condition Trouble Area Warning Indicate Test Mode / Check Mode
B163A/3A Side Airbag Sensor Assembly No. 2 (LH)
  • Side airbag sensor assembly LH malfunction
  • Airbag ECU assembly malfunction
  • Side airbag sensor assembly LH
  • Airbag ECU assembly
Comes on Not applicable