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Home >> Lexus >> 2011 >> RX 350 FWD >> Repair and Diagnosis >> Restraints >> Air Bag, SRS >> Supplemental Restraint System (Diagnostic Codes (B1000/31 - B1653/35)) >> Airbag System >> DTC B1620/21: Side Airbag Sensor RH Circuit Malfunction >> Description

DTC B1620/21: Side Airbag Sensor RH Circuit Malfunction: Description

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

The side airbag sensor RH (for rear side) 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 RH (for rear side).

DTC No. DTC Detection Condition Trouble Area
B1620/21
  • Side airbag sensor RH (for rear side) malfunction
  • Center airbag sensor assembly malfunction
  • Side airbag sensor RH (for Rear side)
  • Center airbag sensor assembly