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Home >> Lexus >> 2017 >> RX 350 Base, AWD >> Repair and Diagnosis (Single Page) >> Restraints >> Air Bag, SRS >> Airbag System - Diagnostic Codes & Symptom Tests >> Airbag System >> 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) [08/2019 - ] >> Description
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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) [08/2019 - ]: Description

The front pretensioner squib RH circuit consists of the airbag sensor assembly and front seat outer belt assembly RH.

The airbag sensor 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 sensor assembly detects a line short in the front pretensioner squib RH circuit during the primary check.
  • Front pretensioner squib RH malfunction
  • Airbag sensor assembly malfunction
  • Floor wire
  • Front pretensioner squib RH (Front seat outer belt assembly RH)
  • Airbag sensor assembly
 Comes on Applies to check mode
B1901 Open in P/T Squib (RH) Circuit
  • The airbag sensor assembly detects an open in the front pretensioner squib RH circuit.
  • Front pretensioner squib RH malfunction
  • Airbag sensor assembly malfunction
  • Floor wire
  • Front pretensioner squib RH (Front seat outer belt assembly RH)
  • Airbag sensor assembly
 Comes on Applies to check mode
B1902 Short in P/T Squib (RH) Circuit (to Ground)
  • The airbag sensor assembly detects a short to ground in the front pretensioner squib RH circuit.
  • Front pretensioner squib RH malfunction
  • Airbag sensor assembly malfunction
  • Floor wire
  • Front pretensioner squib RH (Front seat outer belt assembly RH)
  • Airbag sensor assembly
 Comes on Applies to check mode
B1903 Short in P/T Squib (RH) Circuit (to +B)
  • The airbag sensor assembly detects a short to B+ in the front pretensioner squib RH circuit.
  • Front pretensioner squib RH malfunction
  • Airbag sensor assembly malfunction
  • Floor wire
  • Front pretensioner squib RH (Front seat outer belt assembly RH)
  • Airbag sensor assembly
 Comes on Applies to check mode
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