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Home >> Lexus >> 2018 >> NX 300h >> Repair and Diagnosis >> Restraints >> Air Bag, SRS >> Airbag System - Diagnostic Codes (3 Of 3) & Symptom Tests >> Airbag System >> DTC B1875-67: Short in Passenger Side Front Seat Cushion Squib Circuit; DTC B1876-67: Open in Passenger Side Front Seat Cushion Squib Circuit; DTC B1877-67: Short to GND in Passenger Side Front Seat Cushion Squib Circuit; DTC B1878-67: Short to B+ in Passenger Side Front Seat Cushion Squib Circuit [10/2014 - 05/2019] >> Description

DTC B1875-67: Short in Passenger Side Front Seat Cushion Squib Circuit; DTC B1876-67: Open in Passenger Side Front Seat Cushion Squib Circuit; DTC B1877-67: Short to GND in Passenger Side Front Seat Cushion Squib Circuit; DTC B1878-67: Short to B+ in Passenger Side Front Seat Cushion Squib Circuit [10/2014 - 05/2019]: Description

The front seat cushion squib RH circuit consists of the airbag ECU assembly and the front seat cushion airbag assembly RH.

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

These DTCs are recorded when a malfunction is detected in the front seat cushion squib RH circuit.

DTC No. Detection Item DTC Detection Condition Trouble Area
B1875/67 Short in Passenger Side Front Seat Cushion Squib Circuit One of the following conditions is met: 
  • The airbag ECU assembly receives a line short circuit signal 5 times in the front seat cushion squib RH circuit during primary check.
  • A front seat cushion airbag assembly RH malfunction
  • An airbag ECU assembly malfunction
  • Floor wire
  • Front seat cushion airbag assembly RH
  • Airbag ECU assembly
B1876/67 Open in Passenger Side Front Seat Cushion Squib Circuit One of the following conditions is met: 
  • The airbag ECU assembly receives an open circuit signal in the front seat cushion squib RH circuit for 2 seconds.
  • A front seat cushion airbag assembly RH malfunction
  • An airbag ECU assembly malfunction
  • Floor wire
  • Front seat cushion airbag assembly RH
  • Airbag ECU assembly
B1877/67 Short to GND in Passenger Side Front Seat Cushion Squib Circuit One of the following conditions is met: 
  • The airbag ECU assembly receives a short circuit to ground signal in the front seat cushion squib RH circuit for 0.5 seconds.
  • A front seat cushion airbag assembly RH malfunction
  • An airbag ECU assembly malfunction
  • Floor wire
  • Front seat cushion airbag assembly RH
  • Airbag ECU assembly
B1878/67 Short to B+ in Passenger Side Front Seat Cushion Squib Circuit One of the following conditions is met: 
  • The airbag ECU assembly receives a short circuit to B+ signal in the front seat cushion squib RH circuit for 0.5 seconds.
  • A front seat cushion airbag assembly RH malfunction
  • An airbag ECU assembly malfunction
  • Floor wire
  • Front seat cushion airbag assembly RH
  • Airbag ECU assembly
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