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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 B163B/86: Side Airbag Sensor Assembly No. 2 Lost Communication (LH); DTC B163C/86: Side Airbag Sensor Assembly No. 2 Initialization Error (LH) [03/2017 - 04/2020] >> Description

DTC B163B/86: Side Airbag Sensor Assembly No. 2 Lost Communication (LH); DTC B163C/86: Side Airbag Sensor Assembly No. 2 Initialization Error (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.

These DTCs are stored when a malfunction is detected in the side collision sensor LH circuit.

DTC No. Detection Item DTC Detection Condition Trouble Area Warning Indicate Test Mode / Check Mode
B163B/86 Side Airbag Sensor Assembly No. 2 Lost Communication (LH)
  • The airbag ECU assembly detects a line short, short to ground or B+, or an open in the side collision sensor LH circuit.
  • Side airbag sensor assembly LH malfunction
  • Airbag ECU assembly malfunction
  • Floor wire
  • Side airbag sensor assembly LH
  • Airbag ECU assembly
Comes on Not applicable
B163C/86 Side Airbag Sensor Assembly No. 2 Initialization Error (LH)
  • The airbag ECU assembly detects a line short, short to ground or B+, or an open in the side collision sensor LH circuit.
  • Side airbag sensor assembly LH malfunction
  • Airbag ECU assembly malfunction
  • Floor wire
  • Side airbag sensor assembly LH
  • Airbag ECU assembly
Comes on Not applicable