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Home >> Lexus >> 2020 >> ES 300h Luxury >> Repair and Diagnosis >> External Pages >> Different car >> Section 68 (Airbag System (Except Hybrid) - Diagnostic Codes (1 Of 3)) >> AIRBAG SYSTEM (for Gasoline Model) >> DTC B1635: Curtain Shield Airbag Sensor (LH); DTC B1637: Curtain Shield Airbag Sensor Lost Communication (LH) [06/2018 - 09/2022] >> Description

DTC B1635: Curtain Shield Airbag Sensor (LH); DTC B1637: Curtain Shield Airbag Sensor Lost Communication (LH) [06/2018 - 09/2022]: Description

WARNING: This page does not describe the selected car, but rather 10 other vehicles, including the 2024 Lexus ES 350, 2024 Lexus ES 250, 2023 Lexus ES 350, 2023 Lexus ES 250, and 2022 Lexus ES 350. However, it is still accessible from the selected car via links, so may be relevant.

The side collision sensor LH circuit (bus 1) consists of the airbag ECU assembly, door side airbag sensor LH and side No. 2 airbag sensor assembly LH.

The door side airbag sensor LH and side No. 2 airbag sensor assembly LH detect impacts to the vehicle and send signals to the airbag ECU assembly to determine if the airbags and pretensioners should be deployed.

These DTCs are stored when a malfunction is detected in the side No. 2 airbag sensor assembly LH.

DTC No. Detection Item DTC Detection Condition Trouble Area Warning Indicate Test Mode / Check Mode
B1635 Curtain Shield Airbag Sensor (LH)
  • Side No. 2 airbag sensor assembly LH malfunction
  • Airbag ECU assembly malfunction
  • Side No. 2 airbag sensor assembly LH
  • Airbag ECU assembly
Comes on Does not apply to test/check mode
B1637 Curtain Shield Airbag Sensor Lost Communication (LH)
  • Side No. 2 airbag sensor assembly LH malfunction
  • Airbag ECU assembly malfunction
  • Side No. 2 airbag sensor assembly LH
  • Airbag ECU assembly
Comes on Does not apply to test/check mode