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Home >> Lexus >> 2021 >> LC 500 2D Coupe >> Repair and Diagnosis >> Restraints >> Air Bag, SRS >> Airbag System - Diagnostic Codes (Coupe) (1 Of 5) >> Airbag System >> DTC B1612/83: Lost Communication with Front Airbag Sensor RH; DTC B1613/83: Front Airbag Sensor RH Initialization Incomplete [03/2017 - 04/2020] >> Description

DTC B1612/83: Lost Communication with Front Airbag Sensor RH; DTC B1613/83: Front Airbag Sensor RH Initialization Incomplete [03/2017 - 04/2020]: Description

The front airbag sensor RH circuit consists of the airbag ECU assembly and front airbag sensor RH.

The front airbag sensor RH detects impacts to the vehicle and sends signals to the airbag ECU assembly to determine if the airbag should be deployed.

DTC B1612/83 or B1613/83 is stored when a malfunction is detected in the front airbag sensor RH circuit.

DTC No. Detection Item DTC Detection Condition Trouble Area Warning Indicate Test Mode / Check Mode
B1612/83 Lost Communication with Front Airbag Sensor RH One of the following conditions is met:
  • The airbag ECU assembly detects a line short circuit signal, open circuit signal, short circuit to ground signal or short circuit to B+ signal in the front airbag sensor RH circuit for 2 seconds.
  • A front airbag sensor RH malfunction.
  • An airbag ECU assembly malfunction.
  • Instrument panel wire
  • Engine room main wire
  • Front airbag sensor RH
  • Airbag ECU assembly
Comes on Not applicable
B1613/83 Front Airbag Sensor RH Initialization Incomplete One of the following conditions is met:
  • The airbag ECU assembly detects a line short circuit signal, open circuit signal, short circuit to ground signal or short circuit to B+ signal in the front airbag sensor RH circuit for 2 seconds.
  • A front airbag sensor RH malfunction.
  • An airbag ECU assembly malfunction.
  • Instrument panel wire
  • Engine room main wire
  • Front airbag sensor RH
  • Airbag ECU assembly
Comes on Not applicable