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Home >> Toyota >> 2018 >> Mirai >> Repair and Diagnosis >> Restraints >> Air Bag, SRS >> Airbag System - Diagnostic Codes (2 Of 3) >> Airbag System >> DTC B1692-81: Lost Communication with Door Side Airbag Sensor RH; DTC B1693-81: Door Side Airbag Sensor RH Initialization Incomplete [06/2015 - ] >> Description

DTC B1692-81: Lost Communication with Door Side Airbag Sensor RH; DTC B1693-81: Door Side Airbag Sensor RH Initialization Incomplete [06/2015 - ]: Description

The door side airbag sensor RH is composed of a safing sensor, diagnostic circuit, lateral deceleration sensor, etc. When the airbag sensor assembly receives a signal from the lateral deceleration sensor, the airbag sensor assembly judges whether the SRS should be activated. If a malfunction is detected in the side satellite sensor bus circuit, the airbag sensor assembly stores DTCs B1692/81 and/or B1693/81.

DTC No. Detection Item DTC Detection Condition Trouble Area Test Mode / Check Mode
B1692/81 Lost Communication with Door Side Airbag Sensor RH
  • The airbag sensor assembly detects a line short, short to ground or B+, or an open in the door side airbag sensor RH circuit.
  • Rear airbag sensor RH malfunction
  • Door side airbag sensor RH malfunction
  • Airbag sensor assembly malfunction
  • Floor wire No. 2
  • Rear airbag sensor RH
  • Door side airbag sensor RH
  • Front door wire RH
  • Airbag sensor assembly
Does not apply to test/check mode
B1693/81 Door Side Airbag Sensor RH Initialization Incomplete
  • The airbag sensor assembly detects a line short, short to ground or B+, or an open in the door side airbag sensor RH circuit.
  • Rear airbag sensor RH malfunction
  • Door side airbag sensor RH malfunction
  • Airbag sensor assembly malfunction
  • Floor wire No. 2
  • Rear airbag sensor RH
  • Door side airbag sensor RH
  • Front door wire RH
  • Airbag sensor assembly
Does not apply to test/check mode