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Home >> Lexus >> 2022 >> LS 500h AWD >> Repair and Diagnosis >> Restraints >> Air Bag, SRS >> Airbag System (W/O Advanced Park) - Diagnostic Codes (3 Of 3) >> AIRBAG SYSTEM (w/o Advanced Park) >> DTC B1885: Short in Rear Seat Cushion Squib LH Circuit; DTC B1886: Open in Rear Seat Cushion Squib LH Circuit; DTC B1887: Short to GND in Rear Seat Cushion Squib LH Circuit; DTC B1888: Short to B+ in Rear Seat Cushion Squib LH Circuit [10/2020 - 10/2023] >> Description

DTC B1885: Short in Rear Seat Cushion Squib LH Circuit; DTC B1886: Open in Rear Seat Cushion Squib LH Circuit; DTC B1887: Short to GND in Rear Seat Cushion Squib LH Circuit; DTC B1888: Short to B+ in Rear Seat Cushion Squib LH Circuit [10/2020 - 10/2023]: Description

The rear seat cushion squib LH circuit consists of the airbag ECU assembly and rear seat cushion airbag assembly LH.

The circuit instructs the SRS to deploy when deployment conditions are met.

These DTCs are stored when a malfunction is detected in the rear seat cushion squib LH circuit.

DTC No. Detection Item DTC Detection Condition Trouble Area Warning Indicate Test Mode / Check Mode
B1885 Short in Rear Seat Cushion Squib LH Circuit One of the following conditions is met:
  • The airbag ECU assembly detects a line short circuit signal 5 times in the rear seat cushion squib LH circuit during the primary check.
  • A rear seat cushion airbag assembly LH malfunction.
  • An airbag ECU assembly malfunction.
  • Floor wire
  • Rear seat wire LH
  • Rear Seat Cushion airbag assembly LH
  • Airbag ECU assembly
Comes on Applicable
B1886 Open in Rear Seat Cushion Squib LH Circuit One of the following conditions is met:
  • The airbag ECU assembly detects an open circuit signal in the rear seat cushion squib LH circuit for 2 seconds.
  • A rear seat cushion airbag assembly LH malfunction.
  • An airbag ECU assembly malfunction.
  • Floor wire
  • Rear seat wire LH
  • Rear Seat Cushion airbag assembly LH
  • Airbag ECU assembly
Comes on Applicable
B1887 Short to GND in Rear Seat Cushion Squib LH Circuit One of the following conditions is met:
  • The airbag ECU assembly detects a short circuit to ground signal in the rear seat cushion squib LH circuit for 0.5 seconds.
  • A rear seat cushion airbag assembly LH malfunction.
  • An airbag ECU assembly malfunction.
  • Floor wire
  • Rear seat wire LH
  • Rear Seat Cushion airbag assembly LH
  • Airbag ECU assembly
Comes on Applicable
B1888 Short to B+ in Rear Seat Cushion Squib LH Circuit One of the following conditions is met:
  • The airbag ECU assembly detects a short circuit to B+ signal in the rear seat cushion squib LH circuit for 0.5 seconds.
  • A rear seat cushion airbag assembly LH malfunction.
  • An airbag ECU assembly malfunction.
  • Floor wire
  • Rear seat wire LH
  • Rear Seat Cushion airbag assembly LH
  • Airbag ECU assembly
Comes on Applicable