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Home >> Toyota >> 2021 >> 4Runner Limited, RWD >> Repair and Diagnosis >> Restraints >> Air Bag, SRS >> Airbag System - Diagnostic Codes (B100-B1690) >> Airbag System >> DTC B1612: Front Airbag Sensor Lost Communication (RH); DTC B1613: Front Airbag Sensor Initialization Error (RH) [08/2019 - ] >> Description

DTC B1612: Front Airbag Sensor Lost Communication (RH); DTC B1613: Front Airbag Sensor Initialization Error (RH) [08/2019 - ]: Description

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

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

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

DTC Code DTC Detection Condition Trouble Area
B1612 One of the following conditions is met:
  • The airbag sensor 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 sensor assembly malfunction.
  • Instrument panel wire
  • Engine room main wire
  • Front airbag sensor RH
  • Airbag sensor assembly
B1613 One of the following conditions is met:
  • The airbag sensor 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 sensor assembly malfunction.
  • Instrument panel wire
  • Engine room main wire
  • Front airbag sensor RH
  • Airbag sensor assembly