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Home >> Lexus >> 2008 >> IS 250 RWD, Automatic >> Repair and Diagnosis >> External Pages >> Different car >> Section 33 (Supplemental Restraint System) >> Airbag System >> DTC B1815/54 Short in Front Passenger Side Squib 2nd Step Circuit; DTC B1816/54 Open in Front Passenger Side Squib 2nd Step Circuit; DTC B1817/54 Short to GND in Front Passenger Side Squib 2nd Step Circuit; DTC B1818/54 Short to B+ in Front Passenger Side Squib 2nd Step Circuit >> Description

DTC B1815/54 Short in Front Passenger Side Squib 2nd Step Circuit; DTC B1816/54 Open in Front Passenger Side Squib 2nd Step Circuit; DTC B1817/54 Short to GND in Front Passenger Side Squib 2nd Step Circuit; DTC B1818/54 Short to B+ in Front Passenger Side Squib 2nd Step Circuit: Description

WARNING: This page is about a different car, the 2008 Lexus IS F. However, it is still accessible from the selected car via links, so may be relevant.

The front passenger side squib 2nd step circuit consists of the center airbag sensor assembly and the front passenger airbag assembly.

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

These DTCs are recorded when a malfunction is detected in the front passenger side squib 2nd step circuit.

DTC DETECTION CONDITION CHART

DTC No. DTC Detection Condition Trouble Area
B1815/54
  • The center airbag sensor assembly receives a line short circuit signal 5 times in the front passenger side squib 2nd step circuit during primary check
  • Front passenger side squib 2nd step malfunction
  • Center airbag sensor assembly malfunction
  • Instrument panel wire
  • Instrument panel wire assembly
  • Front passenger airbag assembly (Front passenger side squib 2nd step)
  • Center airbag sensor assembly
B1816/54
  • The center airbag sensor assembly receives an open circuit signal in the front passenger side squib 2nd step circuit for 2 seconds
  • Front passenger side squib 2nd step malfunction
  • Center airbag sensor assembly malfunction
  • Instrument panel wire
  • Instrument panel wire assembly
  • Front passenger airbag assembly (Front passenger side squib 2nd step)
  • Center airbag sensor assembly
B1817/54
  • The center airbag sensor assembly receives a short circuit to ground signal in the front passenger side squib 2nd step circuit for 0 5 seconds
  • Front passenger side squib 2nd step malfunction
  • Center airbag sensor assembly malfunction
  • Instrument panel wire
  • Instrument panel wire assembly
  • Front passenger airbag assembly (Front passenger side squib 2nd step)
  • Center airbag sensor assembly
B1818/54
  • The center airbag sensor assembly receives a short circuit to B+ signal in the front passenger side squib 2nd step circuit for 0 5 seconds
  • Front passenger side squib 2nd step malfunction
  • Center airbag sensor assembly malfunction
  • Instrument panel wire
  • Instrument panel wire assembly
  • Front passenger airbag assembly (Front passenger side squib 2nd step)
  • Center airbag sensor assembly
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