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Home >> Lexus >> 2018 >> LC 500 >> Repair and Diagnosis >> Restraints >> Air Bag, SRS >> Airbag System - Diagnostic Codes (Coupe) (5 Of 5) & Symptom Tests >> Airbag System >> DTC B1905/74: Short in Front Pretensioner Squib LH Circuit; DTC B1906/74: Open in Front Pretensioner Squib LH Circuit; DTC B1907/74: Short to GND in Front Pretensioner Squib LH Circuit; DTC B1908/74: Short to B+ in Front Pretensioner Squib LH 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 CHECK MODE PROCEDURE [03/2017 - ] ), and then wiggle each connector of the airbag system or drive the vehicle on various types of road (Refer to HOW TO PROCEED WITH TROUBLESHOOTING [03/2017 - 04/2020] ).

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