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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 B1900: Short in P/T Squib (RH) Circuit; DTC B1901: Open in P/T Squib (RH) Circuit; DTC B1902: Short in P/T Squib (RH) Circuit (to Ground); DTC B1903: Short in P/T Squib (RH) Circuit (to +B) [06/2018 - ] >> Description

DTC B1900: Short in P/T Squib (RH) Circuit; DTC B1901: Open in P/T Squib (RH) Circuit; DTC B1902: Short in P/T Squib (RH) Circuit (to Ground); DTC B1903: Short in P/T Squib (RH) 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 RH circuit consists of the airbag ECU assembly and front seat outer belt assembly RH.

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 RH circuit.

DTC No. Detection Item DTC Detection Condition Trouble Area Warning Indicate Test Mode / Check Mode
B1900 Short in P/T Squib (RH) Circuit
  • The airbag ECU assembly detects a line short in the front pretensioner squib RH circuit during the primary check.
  • Front pretensioner squib RH malfunction
  • Airbag ECU assembly malfunction
  • Floor wire
  • Front pretensioner squib RH (Front seat outer belt assembly RH)
  • Airbag ECU assembly
 Comes on Applies to check mode
B1901 Open in P/T Squib (RH) Circuit
  • The airbag ECU assembly detects an open in the front pretensioner squib RH circuit.
  • Front pretensioner squib RH malfunction
  • Airbag ECU assembly malfunction
  • Floor wire
  • Front pretensioner squib RH (Front seat outer belt assembly RH)
  • Airbag ECU assembly
 Comes on Applies to check mode
B1902 Short in P/T Squib (RH) Circuit (to Ground)
  • The airbag ECU assembly detects a short to ground in the front pretensioner squib RH circuit.
  • Front pretensioner squib RH malfunction
  • Airbag ECU assembly malfunction
  • Floor wire
  • Front pretensioner squib RH (Front seat outer belt assembly RH)
  • Airbag ECU assembly
 Comes on Applies to check mode
B1903 Short in P/T Squib (RH) Circuit (to +B)
  • The airbag ECU assembly detects a short to B+ in the front pretensioner squib RH circuit.
  • Front pretensioner squib RH malfunction
  • Airbag ECU assembly malfunction
  • Floor wire
  • Front pretensioner squib RH (Front seat outer belt assembly RH)
  • Airbag ECU assembly
 Comes on Applies to check mode
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