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Home >> Lexus >> 2021 >> LS 500h RWD >> Repair and Diagnosis >> Restraints >> Air Bag, SRS >> Airbag System (W/O Advanced Park) - Diagnostic Codes (1 Of 3) >> AIRBAG SYSTEM (w/o Advanced Park) >> DTC B1620: Side Airbag Sensor Assembly (RH); DTC B1622: Side Airbag Sensor Assembly Lost Communication (RH) [10/2020 - 11/2021] >> Description

DTC B1620: Side Airbag Sensor Assembly (RH); DTC B1622: Side Airbag Sensor Assembly Lost Communication (RH) [10/2020 - 11/2021]: Description

The side airbag sensor assembly RH consists of a lateral deceleration sensor, etc.

If the airbag ECU assembly receives signals from the lateral deceleration sensor, it determines whether the SRS should be activated.

DTC B1620 or B1622 is stored when a malfunction is detected in the side airbag sensor assembly RH circuit.

DTC No. Detection Item DTC Detection Condition Trouble Area Warning Indicate Test Mode / Check Mode
B1620 Side Airbag Sensor Assembly (RH) Either condition is met:
  • A side airbag sensor assembly RH malfunction.
  • An airbag ECU assembly malfunction.
  • Side airbag sensor assembly RH
  • Airbag ECU assembly
Comes on Not applicable
B1622 Side Airbag Sensor Assembly Lost Communication (RH) Either condition is met:
  • A side airbag sensor assembly RH malfunction.
  • An airbag ECU assembly malfunction.
  • Side airbag sensor assembly RH
  • Airbag ECU assembly
Comes on Not applicable