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Home >> Lexus >> 2008 >> IS 250 RWD, Automatic >> Repair and Diagnosis >> External Pages >> Different car >> Section 33 (Supplemental Restraint System) >> Airbag System >> DTC B1620/21 Driver Side - Side Airbag Sensor Malfunction >> Description

DTC B1620/21 Driver Side - Side Airbag Sensor Malfunction: Description

WARNING: This page is about a different car, the 2008 Lexus IS F. However, it is still accessible from the selected car via links, so may be relevant.

The driver side - side collision sensor circuit (to determine deployment of the front seat side airbag assembly LH and curtain shield airbag assembly LH) is composed of the center airbag sensor assembly, side airbag sensor LH, and rear airbag sensor LH

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

DTC B1620/21 is recorded when a malfunction is detected in the side airbag sensor LH

DTC DETECTION CONDITION CHART

DTC No. DTC Detection Condition Trouble Area
B1620/21
  • Side airbag sensor LH malfunction
  • Center airbag sensor assembly malfunction
  • Side airbag sensor LH
  • Center airbag sensor assembly