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Home >> Toyota >> 2021 >> 4Runner TRD Pro >> Repair and Diagnosis >> Restraints >> Air Bag, SRS >> Airbag System - Diagnostic Codes (B1690-B1905) & Symptom Tests >> Airbag System >> DTC B1693-81: Door Side Airbag Sensor RH Initialization Incomplete; DTC B1698-82: Door Side Airbag Sensor LH Initialization Incomplete [08/2015 - 08/2019] >> Description

DTC B1693-81: Door Side Airbag Sensor RH Initialization Incomplete; DTC B1698-82: Door Side Airbag Sensor LH Initialization Incomplete [08/2015 - 08/2019]: Description

The circuit for the side collision sensor LH or RH (to determine deployment of the front seat side airbag LH or RH and curtain shield airbag LH or RH) is composed of the center airbag sensor, rear airbag sensor LH or RH and side airbag sensor LH or RH.

The rear airbag sensor LH or RH and side airbag sensor LH or RH detect impacts to the vehicle and send signals to the center airbag sensor to determine if the airbag should be deployed.

DTC B1693-81 or B1698-82 is stored when a malfunction is detected in the circuit for the side collision sensor LH or RH (to determine deployment of the front seat side airbag LH or RH and curtain shield airbag LH or RH).

DTC Code DTC Detection Condition Trouble Area
B1693-81 One of the following conditions is met:
  • The center airbag sensor detects a line short circuit signal, open circuit signal, short circuit to ground signal or short circuit to B+ signal in the circuit for the side collision sensor RH (to determine deployment of the front seat side airbag RH and curtain shield airbag RH) for 2 seconds.
  • A side airbag sensor RH malfunction.
  • A rear airbag sensor RH malfunction.
  • A center airbag sensor malfunction.
  • Floor wire
  • Front door wire RH
  • Side airbag sensor assembly RH
  • Rear airbag sensor RH
  • Center airbag sensor assembly
B1698-82 One of the following conditions is met:
  • The center airbag sensor detects a line short circuit signal, open circuit signal, short circuit to ground signal or short circuit to B+ signal in the circuit for the side collision sensor LH (to determine deployment of the front seat side airbag LH and curtain shield airbag LH) for 2 seconds.
  • A side airbag sensor LH malfunction.
  • A rear airbag sensor LH malfunction.
  • A center airbag sensor malfunction.
  • No. 2 floor wire
  • Front door wire LH
  • Side airbag sensor assembly LH
  • Rear airbag sensor LH
  • Center airbag sensor assembly