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Home >> Lexus >> 2021 >> LC 500 2D Coupe >> Repair and Diagnosis >> Restraints >> Air Bag, SRS >> Airbag System - Diagnostic Codes (Coupe) (4 Of 5) >> Airbag System >> DTC B1815/54: Short in Front Passenger Side Squib 2nd Step Circuit; DTC B1816/54: Open in Front Passenger Side Squib 2nd Step Circuit; DTC B1817/54: Short to GND in Front Passenger Side Squib 2nd Step Circuit; DTC B1818/54: Short to B+ in Front Passenger Side Squib 2nd Step Circuit [03/2017 - 04/2020] >> Caution / Notice / Hint

Caution / Notice / Hint

NOTE:
  • After turning the engine switch off, waiting time may be required before disconnecting the cable from the negative (-) battery terminal. Therefore, make sure to read the disconnecting the cable from the negative (-) battery terminal notices before proceeding with work.

    Refer to PRECAUTION [03/2017 - 05/2023]

  • When disconnecting the cable from the negative (-) battery terminal while performing repairs, some systems need to be initialized after the cable is reconnected.

    Refer to INITIALIZATION [03/2017 - 04/2020]

HINT: 

To perform the simulation method, enter check mode (signal check) with the Techstream (Refer to HOW TO PROCEED WITH TROUBLESHOOTING [03/2017 - 04/2020] ), and then wiggle each connector of the airbag system or drive the vehicle on various types of road (Refer to CHECK MODE PROCEDURE [03/2017 - ] ).

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