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Home >> Lexus >> 2021 >> ES 300h Luxury >> Repair and Diagnosis >> External Pages >> Different car >> Section 221 (Airbag System (Except Hybrid) - Diagnostic Codes (3 Of 3) & Symptom Tests) >> AIRBAG SYSTEM (for Gasoline Model) >> DTC B1905: Short in P/T Squib (LH) Circuit; DTC B1906: Open in P/T Squib (LH) Circuit; DTC B1907: Short in P/T Squib (LH) Circuit (to Ground); DTC B1908: Short in P/T Squib (LH) Circuit (to +B) [06/2018 - ] >> Description

DTC B1905: Short in P/T Squib (LH) Circuit; DTC B1906: Open in P/T Squib (LH) Circuit; DTC B1907: Short in P/T Squib (LH) Circuit (to Ground); DTC B1908: Short in P/T Squib (LH) Circuit (to +B) [06/2018 - ]: 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 front pretensioner squib LH circuit consists of the airbag ECU assembly and front seat outer belt assembly LH.

The airbag ECU assembly uses this circuit to deploy the pretensioner when deployment conditions are met.

These DTCs are stored when a malfunction is detected in the front pretensioner squib LH circuit.

DTC No. Detection Item DTC Detection Condition Trouble Area Warning Indicate Test Mode / Check Mode
B1905 Short in P/T Squib (LH) Circuit
  • The airbag ECU assembly detects a line short in the front pretensioner squib LH circuit during the primary check.
  • Front pretensioner squib LH malfunction
  • Airbag ECU assembly malfunction
  • Floor wire
  • Front pretensioner squib LH (Front seat outer belt assembly LH)
  • Airbag ECU assembly
 Comes on Applies to check mode
B1906 Open in P/T Squib (LH) Circuit
  • The airbag ECU assembly detects an open in the front pretensioner squib LH circuit.
  • Front pretensioner squib LH malfunction
  • Airbag ECU assembly malfunction
  • Floor wire
  • Front pretensioner squib LH (Front seat outer belt assembly LH)
  • Airbag ECU assembly
 Comes on Applies to check mode
B1907 Short in P/T Squib (LH) Circuit (to Ground)
  • The airbag ECU assembly detects a short to ground in the front pretensioner squib LH circuit.
  • Front pretensioner squib LH malfunction
  • Airbag ECU assembly malfunction
  • Floor wire
  • Front pretensioner squib LH (Front seat outer belt assembly LH)
  • Airbag ECU assembly
 Comes on Applies to check mode
B1908 Short in P/T Squib (LH) Circuit (to +B)
  • The airbag ECU assembly detects a short to B+ in the front pretensioner squib LH circuit.
  • Front pretensioner squib LH malfunction
  • Airbag ECU assembly malfunction
  • Floor wire
  • Front pretensioner squib LH (Front seat outer belt assembly LH)
  • Airbag ECU assembly
 Comes on Applies to check mode
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