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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] >> Procedure

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

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.
  1. CHECK SIDE NO. 2 AIRBAG SENSOR ASSEMBLY LH 
    1. Turn the engine switch off.
      GTY447346Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *1 Side No. 2 Airbag Sensor Assembly RH
      *2 Airbag ECU Assembly
    2. Disconnect the cable from the negative (-) battery terminal.
      WARNING:

      Wait at least 90 seconds after disconnecting the cable from the negative (-) battery terminal to disable the SRS system.

    3. Interchange the side No. 2 airbag sensor assembly LH with RH and connect the connectors.
    4. Connect the cable to the negative (-) battery terminal.
    5. Turn the engine switch on (IG), and wait for at least 60 seconds.
    6. Clear the DTCs stored in memory.

      Body Electrical > SRS Airbag > Clear DTCs 

    7. Turn the engine switch off.
    8. Turn the engine switch on (IG), and wait for at least 60 seconds.
    9. Check for DTCs.

      Body Electrical > SRS Airbag > Trouble Codes 

      HINT: 

      Codes other than DTCs B1630, B1632, B1635 and B1637 may be output at this time, but they are not related to this check.

      Result

      Result Proceed to
      DTC B1635 or B1637 is output. A
      DTC B1630 or B1632 is output. B
      DTCs B1630, B1632, B1635 and B1637 are not output. C
    10. Turn the engine switch off.
    11. Disconnect the cable from the negative (-) battery terminal.
      WARNING:

      Wait at least 90 seconds after disconnecting the cable from the negative (-) battery terminal to disable the SRS system.

    12. Return the side No. 2 airbag sensor assembly LH and RH to their original positions and connect the connectors.

    Result: 

    A 

    REPLACE AIRBAG ECU ASSEMBLY. Refer to  REMOVAL [06/2018 - 08/2020]  , or refer to  REMOVAL [08/2020 - 08/2021]  , or refer to  REMOVAL [08/2021 - 09/2022] 

    Result: 

    B 

    REPLACE SIDE NO. 2 AIRBAG SENSOR ASSEMBLY LH. Refer to  REMOVAL [06/2018 - 08/2020]  , or refer to  REMOVAL [08/2020 - 08/2021]  , or refer to  REMOVAL [08/2021 - 09/2022] 

    Result: 

    C 

    USE SIMULATION METHOD TO CHECK. Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [06/2018 - ] 

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