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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 B1628: Side Airbag Sensor Assembly Initialization Error (LH) [10/2020 - 11/2021] >> Description

DTC B1628: Side Airbag Sensor Assembly Initialization Error (LH) [10/2020 - 11/2021]: Description

The circuit for the side collision sensor LH is composed of the airbag ECU assembly, door side airbag sensor LH, side airbag sensor assembly LH and rear airbag sensor LH.

The side airbag sensor assembly LH detects impacts to the vehicle and sends signals to the airbag ECU assembly to determine if the airbag should be deployed.

DTC B1628 is stored when a malfunction is detected in the circuit for the side collision sensor LH.

DTC No. Detection Item DTC Detection Condition Trouble Area Warning Indicate Test Mode / Check Mode
B1628 Side Airbag Sensor Assembly Initialization Error (LH) One of the following conditions is met:
  • The airbag ECU assembly 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 for 2 seconds.
  • A side airbag sensor assembly LH malfunction.
  • An airbag ECU assembly malfunction.
  • Floor wire
  • Side airbag sensor assembly LH
  • Airbag ECU assembly
Comes on Not applicable